From newcfd at yahoo.com  Sat Dec  1 09:27:31 2018
From: newcfd at yahoo.com (newcfd)
Date: Sat, 1 Dec 2018 07:27:31 -0700 (MST)
Subject: [vtkusers] isosurface update issue
In-Reply-To: <CANjZAi_3UKRKN+37zg45Xm73W1vqmuRTEiKHAuVuoisFrhO8Rg@mail.gmail.com>
References: <1543554725951-0.post@n5.nabble.com>
 <CANjZAi_3UKRKN+37zg45Xm73W1vqmuRTEiKHAuVuoisFrhO8Rg@mail.gmail.com>
Message-ID: <1543674451900-0.post@n5.nabble.com>

Thanks for your reply. mapSphere was a typing error and should be mapper.
I made the following changes and still have the same problem.

void MyApp::redraw( const double value )
{
    if ( m_pActor == nullptr )
    {
       m_pActor = vtkActor::New();
      vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
       mapper->SetScalarRange(0.0, 1.0);
       m_pActor->SetMapper( mapper );

       renderer->AddActor( m_pActor );
       renderer->SetBackground(1,1,1); // Background color white
   }

   vtkStructuredGrid * mesh =...

  vtkSmartPointer<vtkContourFilter> filter =
  vtkSmartPointer<vtkContourFilter>::New();
  filter->SetInputData( mesh );
  filter->SetNumberOfContours( 1 );
  filter->Setvalue( 0, value ); // value is passed in

  m_pActor->GetMapper()->SetInputConnection( filter->GetOutputPort() );
  renderWindow->Render();
}

It may not be a good idea to delete the actor and make a new one in every
call.



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Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From elvis.stansvik at orexplore.com  Sat Dec  1 09:27:49 2018
From: elvis.stansvik at orexplore.com (Elvis Stansvik)
Date: Sat, 1 Dec 2018 15:27:49 +0100
Subject: [vtkusers] Freeing actor memory
In-Reply-To: <1543601528571.35049@auckland.ac.nz>
References: <1543601528571.35049@auckland.ac.nz>
Message-ID: <CAE-7VJkGYJxmMRYvbdbOcOTGBZ+PXSWUeURE=DPqfMW59U10Vw@mail.gmail.com>

Den fre 30 nov. 2018 kl 19:12 skrev Gib Bogle <g.bogle at auckland.ac.nz>:
>
> I am sequentially rendering a scene composed of an increasing number of actors, each of which is a clipped and capped cone (to be precise, each member of the scene is made up of two actors ? the clipped cone and the cap).    I am not sure about the right way to remove the actors and free the associated memory when the time comes.  The list of things created with New() for each composite actor is quite long (the code is based on the CapClip example.):
>
>
>
> coneSource = vtkSmartPointer<vtkConeSource>::New();
>
> plane = vtkSmartPointer<vtkPlane>::New();
>
> clipMapper = vtkSmartPointer<vtkDataSetMapper>::New();
>
> clipActor = vtkSmartPointer<vtkActor>::New();
>
> boundaryEdges = vtkSmartPointer<vtkFeatureEdges>::New();
>
> boundaryStrips = vtkSmartPointer<vtkStripper>::New();
>
> boundaryPoly = vtkSmartPointer<vtkPolyData>::New();
>
> boundaryMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
>
> boundaryActor = vtkSmartPointer<vtkActor>::New();
>
>
>
> My proposed approach is to use a struct to hold all the vtkSmartPointers, creating a new ACTOR_STRUCT (stored in an array or list) every time a composite actor is created:
>
>
>
> struct actor_struct {
>
>        vtkSmartPointer<vtkConeSource> coneSource;
>
>        vtkSmartPointer<vtkPlane> plane;
>
>        vtkSmartPointer<vtkClipPolyData> clipper;
>
>        vtkSmartPointer<vtkDataSetMapper> clipMapper;
>
>        vtkSmartPointer<vtkActor> clipActor;
>
>        vtkSmartPointer<vtkFeatureEdges> boundaryEdges;
>
>        vtkSmartPointer<vtkStripper> boundaryStrips;
>
>        vtkSmartPointer<vtkPolyData> boundaryPoly;
>
>        vtkSmartPointer<vtkPolyDataMapper> boundaryMapper;
>
>        vtkSmartPointer<vtkActor> boundaryActor;
>
> };
>
> typedef actor_struct ACTOR_STRUCT;
>
>
>
> The motivation is to be able to locate all the allocated objects when memory needs to be freed, but I suspect it is neither the conventional nor the best way.  I have two questions:

I don't know about conventional, but that's how we do it too. In
various places, we have structs or classes that hold smart pointers to
the VTK objects we need to keep alive.

>
>
>
> What is the usual way to handle this situation?
>
> If my proposed method is OK, how should all the actor memory be freed?

The objects will be freed when the smart pointer to them is destroyed
(provided no other user has increased the RefCount of the objects).

HTH,
Elvis

>
>
>
> I?d be grateful if somebody with a better understanding of VTK and C++ could advise me.
>
>
>
> Thanks
>
> Gib
>
>
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers

From g.bogle at auckland.ac.nz  Sat Dec  1 09:48:42 2018
From: g.bogle at auckland.ac.nz (Gib Bogle)
Date: Sat, 1 Dec 2018 14:48:42 +0000
Subject: [vtkusers] [FORGED] Re:  Freeing actor memory
In-Reply-To: <CAE-7VJkGYJxmMRYvbdbOcOTGBZ+PXSWUeURE=DPqfMW59U10Vw@mail.gmail.com>
References: <1543601528571.35049@auckland.ac.nz>,
 <CAE-7VJkGYJxmMRYvbdbOcOTGBZ+PXSWUeURE=DPqfMW59U10Vw@mail.gmail.com>
Message-ID: <1543675715532.49517@auckland.ac.nz>

Thanks Elvis.  Good to know that this is a valid approach.  What about the order of destroying the smart pointers.  Should that be the reverse of the order in which they are created?

Cheers, Gib
________________________________________
From: Elvis Stansvik <elvis.stansvik at orexplore.com>
Sent: Sunday, 2 December 2018 3:27 a.m.
To: Gib Bogle
Cc: VTK Users
Subject: [FORGED] Re: [vtkusers] Freeing actor memory

Den fre 30 nov. 2018 kl 19:12 skrev Gib Bogle <g.bogle at auckland.ac.nz>:
>
> I am sequentially rendering a scene composed of an increasing number of actors, each of which is a clipped and capped cone (to be precise, each member of the scene is made up of two actors ? the clipped cone and the cap).    I am not sure about the right way to remove the actors and free the associated memory when the time comes.  The list of things created with New() for each composite actor is quite long (the code is based on the CapClip example.):
>
>
>
> coneSource = vtkSmartPointer<vtkConeSource>::New();
>
> plane = vtkSmartPointer<vtkPlane>::New();
>
> clipMapper = vtkSmartPointer<vtkDataSetMapper>::New();
>
> clipActor = vtkSmartPointer<vtkActor>::New();
>
> boundaryEdges = vtkSmartPointer<vtkFeatureEdges>::New();
>
> boundaryStrips = vtkSmartPointer<vtkStripper>::New();
>
> boundaryPoly = vtkSmartPointer<vtkPolyData>::New();
>
> boundaryMapper = vtkSmartPointer<vtkPolyDataMapper>::New();
>
> boundaryActor = vtkSmartPointer<vtkActor>::New();
>
>
>
> My proposed approach is to use a struct to hold all the vtkSmartPointers, creating a new ACTOR_STRUCT (stored in an array or list) every time a composite actor is created:
>
>
>
> struct actor_struct {
>
>        vtkSmartPointer<vtkConeSource> coneSource;
>
>        vtkSmartPointer<vtkPlane> plane;
>
>        vtkSmartPointer<vtkClipPolyData> clipper;
>
>        vtkSmartPointer<vtkDataSetMapper> clipMapper;
>
>        vtkSmartPointer<vtkActor> clipActor;
>
>        vtkSmartPointer<vtkFeatureEdges> boundaryEdges;
>
>        vtkSmartPointer<vtkStripper> boundaryStrips;
>
>        vtkSmartPointer<vtkPolyData> boundaryPoly;
>
>        vtkSmartPointer<vtkPolyDataMapper> boundaryMapper;
>
>        vtkSmartPointer<vtkActor> boundaryActor;
>
> };
>
> typedef actor_struct ACTOR_STRUCT;
>
>
>
> The motivation is to be able to locate all the allocated objects when memory needs to be freed, but I suspect it is neither the conventional nor the best way.  I have two questions:

I don't know about conventional, but that's how we do it too. In
various places, we have structs or classes that hold smart pointers to
the VTK objects we need to keep alive.

>
>
>
> What is the usual way to handle this situation?
>
> If my proposed method is OK, how should all the actor memory be freed?

The objects will be freed when the smart pointer to them is destroyed
(provided no other user has increased the RefCount of the objects).

HTH,
Elvis

>
>
>
> I?d be grateful if somebody with a better understanding of VTK and C++ could advise me.
>
>
>
> Thanks
>
> Gib
>
>
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers

From srbn.ghosh99 at gmail.com  Sun Dec  2 04:06:34 2018
From: srbn.ghosh99 at gmail.com (Shrabani Ghosh)
Date: Sun, 2 Dec 2018 02:06:34 -0700 (MST)
Subject: [vtkusers] Delete Edge and create new edge link in vtkSmartPointer
 polydata
Message-ID: <1543741594644-0.post@n5.nabble.com>

For the purpose of mesh decimation I need to delete an edge and create a new
edge for vtkSmartPointer polydata. Is there any function which can
DeleteEdge and Create new edge?

Thank You



--
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From paulo.r.m.carvalho at gmail.com  Sun Dec  2 08:41:06 2018
From: paulo.r.m.carvalho at gmail.com (Paulo Carvalho)
Date: Sun, 2 Dec 2018 11:41:06 -0200
Subject: [vtkusers] vtkParallelCoordinatesView with Qt
In-Reply-To: <AM4PR0902MB176404BF2D727274F12405A9B7D10@AM4PR0902MB1764.eurprd09.prod.outlook.com>
References: <AM4PR0902MB176404BF2D727274F12405A9B7D10@AM4PR0902MB1764.eurprd09.prod.outlook.com>
Message-ID: <CA+xrYwhO7W20fNnunu84b21ag_T1PapooBpwFNmuTDBd5e+bpA@mail.gmail.com>

Hi, Zoltan,

   Please, try the .cpp attached.  I managed to get the graph showing
within the main window and with the interactor working.  The two reasons
for the misbehavior were:

1) The code created a new renderer instead of using the view's.

2) The view and the Qt widget were using different render window objects.

  In conclusion, there were two renderers and two render windows in the
program, causing the observed misbehavior.  Let us know whether it works.

[image: image.png]

regards,

Paulo



Em qua, 28 de nov de 2018 ?s 09:28, Zoltan Kovacs <
Zoltan.Kovacs at esi-group.com> escreveu:

> Dear all,
>
>
>
> Based on the example
>
> https://www.vtk.org/Wiki/VTK/Examples/Cxx/InfoVis/ParallelCoordinatesView
>
> I created a simple Qt project using the class vtkParallelCoordinatesView.  It has only a main window with a PushButton and a QWidget to launch a file
>
> opening dialog for any CSV file and view its content. I also created a Qt Form Class called "ParallelCoordinatesView" with the public function "View", which contains the CSV file reading and the parallel coordinates visualization code from the example. I attached the files.
>
> There are two issues with the functions setting up the render window and the interactor in the public function "View".
>
>
>
> These function calls are commented out in the code:
>
>
>
>     // Set up render window
>
>     view->GetRenderer()->SetBackground(1.0, 1.0, 1.0);
>
>     view->GetRenderer()->GradientBackgroundOff();
>
>     view->GetRenderWindow()->SetSize(1200,600);
>
>     //view->SetInteractor(renderWindowInteractor);
>
>     //view->SetRenderWindow(renderWindow);
>
>     view->ResetCamera();
>
>     view->Render();
>
>     //view->GetInteractor()->Start();
>
>
>
> When I compile and run the code in this form, the parallel coordinates view appears in a window detached from the Qt MainWindow after the file test.csv has been read from the file opening dialog.
>
>
>
> If I remove the comments only from
>
>    //view->SetInteractor(renderWindowInteractor);
>
>     //view->SetRenderWindow(renderWindow);
>
> and compile and run the code then the view window appears in the QWidget in the MainWindow, as expected,
>
> but as soon as I start to move the cursor, everything blacks out in the Mainwindow.
>
>
>
> If remove the comment only from the line
>
>  //view->GetInteractor()->Start();
>
> the I can select lines in the parallel coodinates view vindow, as expected with starting the interactor,
>
> but the Mainwindow hangs.
>
>
>
> I would like to ask if there is a proper setup of the render window and the interactor for the class vtkParallelCoordinatesView with Qt? Thank you very much for your help.
>
>
>
> Kind regards,
>
> Zoltan
>
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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#include "parallelcoordinatesview.h"
#include "ui_parallelcoordinatesview.h"

ParallelCoordinatesView::ParallelCoordinatesView(QVTKOpenGLWidget *OGLWidget, QWidget *widget, QWidget *parent) :
    QWidget(parent),
    ui(new Ui::ParallelCoordinatesView)
{
    ui->setupUi(this);
    ui->setupUi(this);
    QHBoxLayout * layout = new QHBoxLayout();
    layout->addWidget(OGLWidget);
    widget->setLayout(layout);

    renderWindow            = vtkSmartPointer<vtkGenericOpenGLRenderWindow>::New();

    table                   = vtkSmartPointer<vtkTable>::New();
    reader                  = vtkSmartPointer<vtkDelimitedTextReader>::New();
    polydata                = vtkSmartPointer<vtkPolyData>::New();
    rep                     = vtkSmartPointer<vtkParallelCoordinatesRepresentation>::New();
    view                    = vtkSmartPointer<vtkParallelCoordinatesView>::New();

    //Do not create a new renderer, use the view's renderer.
    renderer = view->GetRenderer();

    //Both the view and the Qt widget must share the same render window
    view->SetRenderWindow( renderWindow );
    OGLWidget->SetRenderWindow( renderWindow );

    renderWindowInteractor  = renderWindow->GetInteractor();
    renderWindowInteractor->SetRenderWindow(renderWindow);
    renderer->SetBackground(1.0, 1.0, 1.0);
    renderer->GradientBackgroundOff();
    renderWindow->AddRenderer(renderer);
}

ParallelCoordinatesView::~ParallelCoordinatesView()
{
    delete ui;
}

void ParallelCoordinatesView::View(QString fileName)
{
    std::string title;
    std::string inputFilename = fileName.toStdString();

    reader->SetFileName(inputFilename.c_str());
    reader->SetHaveHeaders(1);
    reader->DetectNumericColumnsOn();
    reader->SetFieldDelimiterCharacters(",");
    reader->Update();

    table = reader->GetOutput();
    title = vtksys::SystemTools::GetFilenameWithoutExtension(
                vtksys::SystemTools::GetFilenameName(inputFilename));

    for (vtkIdType i = 0; i < table->GetNumberOfColumns(); ++i)
        polydata->GetPointData()->AddArray(table->GetColumn(i));

    rep->SetInputData(polydata);

    for (vtkIdType i = 0; i < table->GetNumberOfColumns(); ++i)
    {
        if (vtkStringArray::SafeDownCast(table->GetColumn(i)))
            continue;
        else
            rep->SetInputArrayToProcess(i, 0, 0, 0, table->GetColumn(i)->GetName());
    }

    rep->SetFontSize(.5);
    rep->SetPlotTitle(title.c_str());
    rep->SetLineOpacity(0.5);
    rep->SetLineColor(0.7, 0.7, 0.7);
    rep->SetAxisColor(0.0, 0.0, 0.0);
    rep->SetAxisLabelColor(0.0, 0.0, 0.0);

    // Set up the Parallel Coordinates View and hook in the Representation
    view->SetRepresentation(rep);
    view->SetInspectMode(1);
    view->SetDisplayHoverText(1);

    // Brush Mode determines the type of interaction you perform to select data
    view->SetBrushModeToLasso();
    view->SetBrushOperatorToReplace();

    view->ResetCamera();
    view->Render();
    view->GetInteractor()->Start();
}

From rastor.ragereaver at gmail.com  Sun Dec  2 10:27:24 2018
From: rastor.ragereaver at gmail.com (=?UTF-8?Q?Rados=C5=82aw_Furmaniak?=)
Date: Sun, 2 Dec 2018 16:27:24 +0100
Subject: [vtkusers] Color PolyData based on VolumeData
Message-ID: <CAKO8d6O1SNov0HV6BzjY=VX1b3ghYNrq88jO_tChgS87=vFXOQ@mail.gmail.com>

Hi All,
I am trying to prepare a PolyData object from a series od DCM images and
color it using some transfer function. I managed to create PolyData using
vtkContourFilter.
I also have vtkVolume object with mapped colors, so I know that I have
correct color transfer function and I am able to map intensities onto
desired colors.
 What I am trying to do is achieve the same results colorwise with the
PolyData from ContourFilter. However, I do not know how to tackle this
problem. I have tried using ProbeFilter with PolyData as input and RGB
ImageData as the source, but the output is the same as input.
Any suggestions how to approach this problem or if I am going the right
way? I am fairly new to the VTK, so I do not know many of its possibilites
yet.
I'm working on Python 3.6 with VTK 8.1.1.
Any help is appreciated.
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From Andx_roo at live.com  Sun Dec  2 23:26:42 2018
From: Andx_roo at live.com (Andaharoo)
Date: Sun, 2 Dec 2018 21:26:42 -0700 (MST)
Subject: [vtkusers] Color PolyData based on VolumeData
In-Reply-To: <CAKO8d6O1SNov0HV6BzjY=VX1b3ghYNrq88jO_tChgS87=vFXOQ@mail.gmail.com>
References: <CAKO8d6O1SNov0HV6BzjY=VX1b3ghYNrq88jO_tChgS87=vFXOQ@mail.gmail.com>
Message-ID: <1543811202678-0.post@n5.nabble.com>

So, if I understand right, you want to color the scalar/whatever field onto
the poly? Just provide vtkPolyData with scalars and set the polyData's
mapper scalar visibility to on.

If you give it 1 component scalars you can give the mapper a color function
to map them. If you give it 3 component uchar it should just display them as
color (as long as scalar visibility is on). Like so:


// Create the scalars array
vtkDoubleArray* scalars = vtkDoubleArray::New();
scalars->SetName("Scalars");
// For every point in the poly
for (vtkIdType i = 0; i < outputPoly->GetNumberOfPoints(); i++)
{
	double pt[3];
	outputPoly->GetPoint(i, pt);

	scalars->InsertTuple1(i, trilinearSamplePoint(inputImage, pt[0], pt[1],
pt[2], 1, 0));
}
// Add the scalar data to the poly data
outputPoly->GetPointData()->AddArray(scalars);
outputPoly->GetPointData()->SetActiveScalars("Scalars");


This just goes through all the points in the polygon and gets the color from
the image. Getting the color at a point in an image can be done by simply
using the nearest color from the image (nearest neighbor) or better would be
to use trilinear interpolation of the 8 nearest colors which I used in my
example. Also note my code expects float image input:
static const int calcIndex(int x, int y, int z, int width, int height) {
return x + width * (y + height * z); }

static float trilinearSamplePoint(vtkImageData* imageData, float x, float y,
float z, int numComps, int comp)
{
	float* imagePtr = static_cast<float*>(imageData->GetScalarPointer());
	double* spacing = imageData->GetSpacing();
	double* origin = imageData->GetOrigin();
	int* dim = imageData->GetDimensions();

	// We assume point x, y, z is in the image
	int xi = (x - origin[0]) / spacing[0];
	int yi = (y - origin[1]) / spacing[1];
	int zi = (z - origin[2]) / spacing[2];

	// Get the intensities at the 8 nearest neighbors
	float i000 = imagePtr[calcIndex(xi, yi, zi, dim[0], dim[1]) * numComps +
comp];
	float i100 = imagePtr[calcIndex(xi + 1, yi, zi, dim[0], dim[1]) * numComps
+ comp];
	float i110 = imagePtr[calcIndex(xi + 1, yi + 1, zi, dim[0], dim[1] *
numComps + comp)];
	float i010 = imagePtr[calcIndex(xi, yi + 1, zi, dim[0], dim[1]) * numComps
+ comp];

	float i001 = imagePtr[calcIndex(xi, yi, zi + 1, dim[0], dim[1]) * numComps
+ comp];
	float i101 = imagePtr[calcIndex(xi + 1, yi, zi + 1, dim[0], dim[1]) *
numComps + comp];
	float i111 = imagePtr[calcIndex(xi + 1, yi + 1, zi + 1, dim[0], dim[1]) *
numComps + comp];
	float i011 = imagePtr[calcIndex(xi, yi + 1, zi + 1, dim[0], dim[1]) *
numComps + comp];

	// Get the fractional/unit distance from nearest neighbor 000
	float rx = xi * spacing[0] + origin[0]; // Position of node
	rx = (x - rx) / spacing[0]; // (Node - actual point position) / voxel width
	float ry = yi * spacing[1] + origin[1];
	ry = (y - ry) / spacing[1];
	float rz = zi * spacing[2] + origin[2];
	rz = (z - rz) / spacing[2];

	// Now we do the trilinear interpolation
	float ax = i000 + (i100 - i000) * rx;
	float bx = i010 + (i110 - i010) * rx;
	float cy = ax + (bx - ax) * ry;

	float dx = i001 + (i101 - i001) * rx;
	float ex = i011 + (i111 - i011) * rx;
	float fy = dx + (ex - dx) * ry;

	float gz = cy + (fy - cy) * rz;
	return gz;
}




--
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From lasso at queensu.ca  Mon Dec  3 01:50:06 2018
From: lasso at queensu.ca (Andras Lasso)
Date: Mon, 3 Dec 2018 06:50:06 +0000
Subject: [vtkusers] Color PolyData based on VolumeData
In-Reply-To: <1543811202678-0.post@n5.nabble.com>
References: <CAKO8d6O1SNov0HV6BzjY=VX1b3ghYNrq88jO_tChgS87=vFXOQ@mail.gmail.com>
 <1543811202678-0.post@n5.nabble.com>
Message-ID: <YQBPR0101MB1859FEE8601440A0F60A73F5D8AE0@YQBPR0101MB1859.CANPRD01.PROD.OUTLOOK.COM>

You can copy voxel values from a volume to a polydata using vtkProbeFilter.

However, this won't help you if you obtained your polydata using a vtkContourFilter, because the contour filter generates isosurface, which means all extracted points have the same intensity value in the input volume. No matter what transfer function you apply, you'll always end up with a solid colored surface.

It is a common desire to replace volume rendering by displaying a colored surface, but this is not feasible (https://discourse.slicer.org/t/save-volume-rendering-as-stl-file/524/20).

If your goal is 3D printing then you may use voxel printing technique, which allows printing directly from volume rendering, without segmenting any surfaces (https://discourse.slicer.org/t/printing-volume-renderings-in-plastic/3017).

If your goal is volume-rendering-like display (for example, you want to show "volume rendering" in Unity) then you need to use an actual volume renderer.

Andras


-----Original Message-----
From: vtkusers <vtkusers-bounces at public.kitware.com> On Behalf Of Andaharoo
Sent: Sunday, December 2, 2018 11:27 PM
To: vtkusers at vtk.org
Subject: Re: [vtkusers] Color PolyData based on VolumeData

So, if I understand right, you want to color the scalar/whatever field onto the poly? Just provide vtkPolyData with scalars and set the polyData's mapper scalar visibility to on.

If you give it 1 component scalars you can give the mapper a color function to map them. If you give it 3 component uchar it should just display them as color (as long as scalar visibility is on). Like so:


// Create the scalars array
vtkDoubleArray* scalars = vtkDoubleArray::New();
scalars->SetName("Scalars");
// For every point in the poly
for (vtkIdType i = 0; i < outputPoly->GetNumberOfPoints(); i++) {
	double pt[3];
	outputPoly->GetPoint(i, pt);

	scalars->InsertTuple1(i, trilinearSamplePoint(inputImage, pt[0], pt[1], pt[2], 1, 0)); } // Add the scalar data to the poly data
outputPoly->GetPointData()->AddArray(scalars);
outputPoly->GetPointData()->SetActiveScalars("Scalars");


This just goes through all the points in the polygon and gets the color from the image. Getting the color at a point in an image can be done by simply using the nearest color from the image (nearest neighbor) or better would be to use trilinear interpolation of the 8 nearest colors which I used in my example. Also note my code expects float image input:
static const int calcIndex(int x, int y, int z, int width, int height) { return x + width * (y + height * z); }

static float trilinearSamplePoint(vtkImageData* imageData, float x, float y, float z, int numComps, int comp) {
	float* imagePtr = static_cast<float*>(imageData->GetScalarPointer());
	double* spacing = imageData->GetSpacing();
	double* origin = imageData->GetOrigin();
	int* dim = imageData->GetDimensions();

	// We assume point x, y, z is in the image
	int xi = (x - origin[0]) / spacing[0];
	int yi = (y - origin[1]) / spacing[1];
	int zi = (z - origin[2]) / spacing[2];

	// Get the intensities at the 8 nearest neighbors
	float i000 = imagePtr[calcIndex(xi, yi, zi, dim[0], dim[1]) * numComps + comp];
	float i100 = imagePtr[calcIndex(xi + 1, yi, zi, dim[0], dim[1]) * numComps
+ comp];
	float i110 = imagePtr[calcIndex(xi + 1, yi + 1, zi, dim[0], dim[1] * numComps + comp)];
	float i010 = imagePtr[calcIndex(xi, yi + 1, zi, dim[0], dim[1]) * numComps
+ comp];

	float i001 = imagePtr[calcIndex(xi, yi, zi + 1, dim[0], dim[1]) * numComps
+ comp];
	float i101 = imagePtr[calcIndex(xi + 1, yi, zi + 1, dim[0], dim[1]) * numComps + comp];
	float i111 = imagePtr[calcIndex(xi + 1, yi + 1, zi + 1, dim[0], dim[1]) * numComps + comp];
	float i011 = imagePtr[calcIndex(xi, yi + 1, zi + 1, dim[0], dim[1]) * numComps + comp];

	// Get the fractional/unit distance from nearest neighbor 000
	float rx = xi * spacing[0] + origin[0]; // Position of node
	rx = (x - rx) / spacing[0]; // (Node - actual point position) / voxel width
	float ry = yi * spacing[1] + origin[1];
	ry = (y - ry) / spacing[1];
	float rz = zi * spacing[2] + origin[2];
	rz = (z - rz) / spacing[2];

	// Now we do the trilinear interpolation
	float ax = i000 + (i100 - i000) * rx;
	float bx = i010 + (i110 - i010) * rx;
	float cy = ax + (bx - ax) * ry;

	float dx = i001 + (i101 - i001) * rx;
	float ex = i011 + (i111 - i011) * rx;
	float fy = dx + (ex - dx) * ry;

	float gz = cy + (fy - cy) * rz;
	return gz;
}




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From polly_sukting at hotmail.com  Mon Dec  3 09:11:24 2018
From: polly_sukting at hotmail.com (Polly Pui)
Date: Mon, 3 Dec 2018 14:11:24 +0000
Subject: [vtkusers] Extract csv row and column into points
In-Reply-To: <CAB5Fpx6bJdwqWApqLL6VX9ujvA=rmY4TGKbtCudHaaJv=5LbjQ@mail.gmail.com>
References: <PU1PR04MB224515848C5C382583A56FD18FC60@PU1PR04MB2245.apcprd04.prod.outlook.com>
 <CAB5Fpx6aD4P33uL0BietXMAPFOai02-VeoMHFqPg=xOrXJ+_Kw@mail.gmail.com>
 <PU1PR04MB224518529F148A7B0962FFB28FC60@PU1PR04MB2245.apcprd04.prod.outlook.com>
 <CAB5Fpx4o9Bp0ENsHQwW18YHLMAWSFwq0vYWYeUSBLVb+987PBA@mail.gmail.com>
 <PU1PR04MB224548E063937C0DB0C4D9168FDC0@PU1PR04MB2245.apcprd04.prod.outlook.com>
 <CAB5Fpx6DggqwVuOwSaJNKhOUstjekUKqc4B1qfd32CQ4P-D8Ow@mail.gmail.com>
 <PU1PR04MB22451781CE75C5AFD32A25A38FDA0@PU1PR04MB2245.apcprd04.prod.outlook.com>
 <PU1PR04MB2245B467BC9D8479BFB9BBD08FDA0@PU1PR04MB2245.apcprd04.prod.outlook.com>,
 <CAB5Fpx6bJdwqWApqLL6VX9ujvA=rmY4TGKbtCudHaaJv=5LbjQ@mail.gmail.com>
Message-ID: <SL2PR04MB3273F58E486D73A34007437D8FAE0@SL2PR04MB3273.apcprd04.prod.outlook.com>

Thanks Cory, you are so helpful. I am trying to figure out how to skip the header of the csv file before calling for Kmeansclustering.
I am getting there. If you have any idea on how to skip reading the header, please advice:)

Thank you so much.

Regards,
Polly
________________________________
From: Cory Quammen <cory.quammen at kitware.com>
Sent: Wednesday, November 28, 2018 12:53 AM
To: Polly Pui
Cc: vtkusers; David Thompson
Subject: Re: [vtkusers] Extract csv row and column into points

Polly,

It seems I was mistaken about the output of the vtkKMeansStatistics filter. It looks like it does not pass through the input columns with something like a cluster label. I have no experience with the filter, so I'm not sure how to guide you from here. David Thompson (CC'ed) would know more since he was an author of the filter. He may be able to help if he has time.

Some resources that may help:

Doxygen page:
https://www.vtk.org/doc/nightly/html/classvtkKMeansStatistics.html#details

Example:
https://www.vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/Statistics/ExampleKMeansStatistics.cxx

Cory

On Wed, Nov 21, 2018 at 1:16 AM Polly Pui <polly_sukting at hotmail.com<mailto:polly_sukting at hotmail.com>> wrote:
And also I tried to remove the lines in order to test if the columns are called successfully. I received the error stated "Failed to locate the columns to use for the point coordinates".

These are the codes:
std::string inputFilename = argv[1];

vtkSmartPointer<vtkDelimitedTextReader> reader =
 vtkSmartPointer<vtkDelimitedTextReader>::New();
reader->SetFileName(inputFilename.c_str());
reader->SetFieldDelimiterCharacters(",");
reader->DetectNumericColumnsOn();
//reader->GetHaveHeaders();
reader->Update();

reader->GetOutput()->Dump();
///////KmeansCluster

vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
 vtkSmartPointer<vtkKMeansStatistics>::New();
kMeansStatistics->SetInputConnection(reader->GetOutputPort());
kMeansStatistics->SetColumnStatus("X", 1);
kMeansStatistics->SetColumnStatus("Y", 1);
kMeansStatistics->SetColumnStatus("Z", 1);
kMeansStatistics->RequestSelectedColumns();
kMeansStatistics->SetAssessOption(true);
kMeansStatistics->SetDefaultNumberOfClusters(5);
//kMeansStatistics->SetLearnOption(1);//to learn the cluster value
kMeansStatistics->SetMaxNumIterations(15);
kMeansStatistics->Update();

vtkSmartPointer<vtkTableToPolyData> t2pd = vtkSmartPointer<vtkTableToPolyData>::New();
t2pd->SetInputConnection(kMeansStatistics->GetOutputPort());
t2pd->SetXColumn("X");
t2pd->SetYColumn("Y");
t2pd->SetZColumn("Z");

vtkSmartPointer<vtkPolyDataMapper> mapper =
 vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(t2pd->GetOutputPort());

vtkSmartPointer<vtkActor> actor =
 vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
actor->GetProperty()->SetPointSize(3);
actor->GetProperty()->SetColor(1, 1, 1);

vtkSmartPointer<vtkRenderer> renderer =
 vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
 vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
renderWindow->SetSize(640, 480);

vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
 vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);

renderer->AddActor(actor);
renderer->SetBackground(0, 0, 0); // Background color black

renderWindow->Render();
renderWindowInteractor->Start();

return EXIT_SUCCESS;
}

I supposed the column of interest to be called are "X", "Y" and "Z".
Please advice.
Thank you very much.

Regards,
Polly
________________________________
From: vtkusers <vtkusers-bounces at public.kitware.com<mailto:vtkusers-bounces at public.kitware.com>> on behalf of Polly Pui <polly_sukting at hotmail.com<mailto:polly_sukting at hotmail.com>>
Sent: Wednesday, November 21, 2018 2:01 PM
To: Cory Quammen
Cc: vtkusers
Subject: Re: [vtkusers] Extract csv row and column into points

Hi Cory,
Thanks for your reply.
I followed your advice and changed the lines as you mentioned.
But I still couldn't get the output successfully.

I would like to clarify if I called the column of interest correctly.
Please refer to the attachment. The columns that to be called as X,Y,Z coordinates are named as "X", "Y", "Z".
When i run the exe file. It failed to load and couldn't get the correct cluster.

This is the codes that I am using.
..............
int main(int argc, char* argv[])
{
std::string inputFilename = argv[1];

vtkSmartPointer<vtkDelimitedTextReader> reader =
 vtkSmartPointer<vtkDelimitedTextReader>::New();
reader->SetFileName(inputFilename.c_str());
reader->SetFieldDelimiterCharacters(",");
reader->DetectNumericColumnsOn();
//reader->GetHaveHeaders();
reader->Update();

///////KmeansCluster

vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
 vtkSmartPointer<vtkKMeansStatistics>::New();
kMeansStatistics->SetInputConnection(reader->GetOutputPort());
kMeansStatistics->SetColumnStatus("X", 1);
kMeansStatistics->SetColumnStatus("Y", 1);
kMeansStatistics->SetColumnStatus("Z", 1);
kMeansStatistics->RequestSelectedColumns();
kMeansStatistics->SetAssessOption(true);
kMeansStatistics->SetDefaultNumberOfClusters(5);
//kMeansStatistics->SetLearnOption(1);//to learn the cluster value
kMeansStatistics->SetMaxNumIterations(15);
kMeansStatistics->Update();

//// Display the results in CMD (each row)
kMeansStatistics->GetOutput()->Dump();

////Group the points according to ID number
vtkSmartPointer<vtkIntArray> clusterArray =
 vtkSmartPointer<vtkIntArray>::New();
clusterArray->SetNumberOfComponents(1);
clusterArray->SetName("ClusterId");

for (int r = 0; r < kMeansStatistics->GetOutput()->GetNumberOfRows(); r++)
{
 vtkVariant v = kMeansStatistics->GetOutput()->GetValue(r, kMeansStatistics->GetOutput()->GetNumberOfColumns() - 1);
 std::cout << "Point " << r << " is in cluster " << v.ToInt() << std::endl;
 clusterArray->InsertNextValue(v.ToInt());
}

//// Create a lookup table to map cell data to colors
vtkSmartPointer<vtkLookupTable> lut =
 vtkSmartPointer<vtkLookupTable>::New();
int tableSize = (kMeansStatistics + 1, 10);
lut->SetNumberOfTableValues(tableSize);
lut->Build();

////ColorCells
vtkSmartPointer<vtkNamedColors> colors =
 vtkSmartPointer<vtkNamedColors>::New();
lut->SetTableValue(0, colors->GetColor4d("Black").GetData());
lut->SetTableValue(1, colors->GetColor4d("Banana").GetData());
lut->SetTableValue(2, colors->GetColor4d("Tomato").GetData());
lut->SetTableValue(3, colors->GetColor4d("Peacock").GetData());
lut->SetTableValue(4, colors->GetColor4d("Lavender").GetData());
lut->SetTableValue(5, colors->GetColor4d("Flesh").GetData());
lut->SetTableValue(6, colors->GetColor4d("Raspberry").GetData());
lut->SetTableValue(7, colors->GetColor4d("Salmon").GetData());
lut->SetTableValue(8, colors->GetColor4d("Mint").GetData());
lut->SetTableValue(9, colors->GetColor4d("Wheat").GetData());

// Output the cluster centers

vtkMultiBlockDataSet* outputMetaDS = vtkMultiBlockDataSet::SafeDownCast(kMeansStatistics->GetOutputDataObject(vtkStatisticsAlgorithm::OUTPUT_MODEL));
vtkTable* outputMeta = vtkTable::SafeDownCast(outputMetaDS->GetBlock(0));

vtkDoubleArray* coord0 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("X"));
vtkDoubleArray* coord1 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Y"));
vtkDoubleArray* coord2 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Z"));

for (unsigned int i = 0; i < coord0->GetNumberOfTuples(); ++i)
{
 std::cout << coord0->GetValue(i) << " " << coord1->GetValue(i) << " " << coord2->GetValue(i) << std::endl;
}

vtkSmartPointer<vtkTableToPolyData> t2pd = vtkSmartPointer<vtkTableToPolyData>::New();
t2pd->SetInputConnection(kMeansStatistics->GetOutputPort());
t2pd->SetXColumn("X");
t2pd->SetYColumn("Y");
t2pd->SetZColumn("Z");

vtkSmartPointer<vtkPolyDataMapper> mapper =
 vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(t2pd->GetOutputPort());

vtkSmartPointer<vtkActor> actor =
 vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
actor->GetProperty()->SetPointSize(3);
actor->GetProperty()->SetColor(1, 1, 1);

vtkSmartPointer<vtkRenderer> renderer =
 vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
 vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
renderWindow->SetSize(640, 480);

vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
 vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);

//renderer->AddActor(actor);
renderer->SetBackground(0, 0, 0); // Background color black

renderWindow->Render();
renderWindowInteractor->Start();

return EXIT_SUCCESS;
}
.........
Please advice. Thank you again!

Regards,
Polly

________________________________
From: Cory Quammen <cory.quammen at kitware.com<mailto:cory.quammen at kitware.com>>
Sent: Monday, November 19, 2018 10:52 PM
To: Polly Pui
Cc: vtkusers
Subject: Re: [vtkusers] Extract csv row and column into points



On Thu, Nov 15, 2018 at 1:26 AM Polly Pui <polly_sukting at hotmail.com<mailto:polly_sukting at hotmail.com>> wrote:
Hi Cory,
Thanks for your reply.
I edited my codes by following your advice. However, I am not able to visualize the point of cluster and got an error message.

I have a few questions here.
Is it possible to call VTK unstructured grid data into vtkKmeansStatistics?

No, vtkKMeansStatistics requires a vtkTable input (it is a subclass of vtkTableAlgorithm). vtkTable is different from a vtkPolyData, which is what you are trying to create. See more inline comments further down.

Actually what i wanted to do is very simple.
I want to read my csv or vtk file and then cluster the points using kmeansclustering.
Initially, I extracted points from csv file manually and I could get my desired output. But it is too time consuming.
Currently, I want to input the csv or vtk file and get the cluster automatically and store in a datasheet.
I attach my code as follows:

#include <vtkVersion.h>
#include "library.h"

#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPointData.h>
#include <vtkPolyData.h>
#include <vtkXMLPolyDataWriter.h>


std::string inputFilename = argv[1];

vtkSmartPointer<vtkDelimitedTextReader> reader =
 vtkSmartPointer<vtkDelimitedTextReader>::New();
reader->SetFileName(inputFilename.c_str());
reader->SetFieldDelimiterCharacters(",");
reader->DetectNumericColumnsOn();
reader->Update();

///////KmeansCluster

vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
 vtkSmartPointer<vtkKMeansStatistics>::New();
kMeansStatistics->SetInputConnection(reader->GetOutputPort());
kMeansStatistics->SetColumnStatus("Column 3", 1);
kMeansStatistics->SetColumnStatus("Column 4", 1);
kMeansStatistics->SetColumnStatus("Column 5", 1);
kMeansStatistics->RequestSelectedColumns();
kMeansStatistics->SetAssessOption(true);
kMeansStatistics->SetDefaultNumberOfClusters(2);
//kMeansStatistics->SetMaxNumIterations(15);
kMeansStatistics->Update();

// Display the results in CMD (each row)
kMeansStatistics->GetOutput()->Dump();


//Group the points according to ID number
vtkSmartPointer<vtkIntArray> clusterArray =
 vtkSmartPointer<vtkIntArray>::New();
clusterArray->SetNumberOfComponents(1);
clusterArray->SetName("ClusterId");

for (int r = 0; r < kMeansStatistics->GetOutput()->GetNumberOfRows(); r++)
{
 vtkVariant v = kMeansStatistics->GetOutput()->GetValue(r, kMeansStatistics->GetOutput()->GetNumberOfColumns() - 1);
 std::cout << "Point " << r << " is in cluster " << v.ToInt() << std::endl;
 clusterArray->InsertNextValue(v.ToInt());
}

// Create a lookup table to map cell data to colors
vtkSmartPointer<vtkLookupTable> lut =
 vtkSmartPointer<vtkLookupTable>::New();
int tableSize = (kMeansStatistics + 1, 10);
lut->SetNumberOfTableValues(tableSize);
lut->Build();

//ColorCells
vtkSmartPointer<vtkNamedColors> colors =
 vtkSmartPointer<vtkNamedColors>::New();
lut->SetTableValue(0, colors->GetColor4d("Black").GetData());
lut->SetTableValue(1, colors->GetColor4d("Banana").GetData());
lut->SetTableValue(2, colors->GetColor4d("Tomato").GetData());
lut->SetTableValue(3, colors->GetColor4d("Peacock").GetData());
lut->SetTableValue(4, colors->GetColor4d("Lavender").GetData());
lut->SetTableValue(5, colors->GetColor4d("Flesh").GetData());
lut->SetTableValue(6, colors->GetColor4d("Raspberry").GetData());
lut->SetTableValue(7, colors->GetColor4d("Salmon").GetData());
lut->SetTableValue(8, colors->GetColor4d("Mint").GetData());
lut->SetTableValue(9, colors->GetColor4d("Wheat").GetData());

// Output the cluster centers

vtkMultiBlockDataSet* outputMetaDS = vtkMultiBlockDataSet::SafeDownCast(kMeansStatistics->GetOutputDataObject(vtkStatisticsAlgorithm::OUTPUT_MODEL));
vtkSmartPointer<vtkTable> outputMeta = vtkTable::SafeDownCast(outputMetaDS->GetBlock(0));
//vtkSmartPointer<vtkTable> outputMeta = vtkTable::SafeDownCast( outputMetaDS->GetBlock( 1 ) );
vtkDoubleArray* coord0 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 0"));
vtkDoubleArray* coord1 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 1"));
vtkDoubleArray* coord2 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 2"));

for (unsigned int i = 0; i < coord0->GetNumberOfTuples(); ++i)
{
 std::cout << coord0->GetValue(i) << " " << coord1->GetValue(i) << " " << coord2->GetValue(i) << std::endl;

}

vtkSmartPointer<vtkPolyData> polydata =
 vtkSmartPointer<vtkPolyData>::New();
polydata->GetPointData()->SetScalars(clusterArray);


The below won't work. vtkKMeansStatistics produces a vtkTable, while the vtkPolyDataMapper requires a vtkPolyData. To convert a vtkTable to a vtkPolyData, which is the key piece you are missing, use vtkTableToPolyData. This class iterates over the rows, treats the columns you designate as X, Y, Z coordinates, and adds the remaining columns as point data arrays in the output vtkPolyData.

It will look something like this:

vtkSmartPointer<vtkTableToPolyData> t2pd = vtkSmartPointer<vtkTableToPolyData>::New();
t2pd->SetInputConnection(kMeansStatistics->GetOutputPort());
t2pd->SetXColumn("name of column to be used as x-coordinate");
t2pd->SetYColumn("name of column to be used as y-coordinate");
t2pd->SetZColumn("name of column to be used as z-coordinate");

Now, change, the code below from:

vtkSmartPointer<vtkPolyDataMapper> mapper =
 vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(kMeansStatistics->GetOutputPort());

to

vtkSmartPointer<vtkPolyDataMapper> mapper =
 vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(t2pd->GetOutputPort());

That should do it.

Cory

vtkSmartPointer<vtkActor> actor =
 vtkSmartPointer<vtkActor>::New();
actor->SetMapper(mapper);
actor->GetProperty()->SetPointSize(3);
actor->GetProperty()->SetColor(1, 0, 0);

vtkSmartPointer<vtkRenderer> renderer =
 vtkSmartPointer<vtkRenderer>::New();
vtkSmartPointer<vtkRenderWindow> renderWindow =
 vtkSmartPointer<vtkRenderWindow>::New();
renderWindow->AddRenderer(renderer);
renderWindow->SetSize(640, 480);

vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
 vtkSmartPointer<vtkRenderWindowInteractor>::New();
renderWindowInteractor->SetRenderWindow(renderWindow);

renderer->AddActor(actor);
renderer->SetBackground(0, 0, 0); // Background color black

renderWindow->Render();
renderWindowInteractor->Start();

return EXIT_SUCCESS;
}


Thank you so much.

Regards,
Polly
________________________________
From: Cory Quammen <cory.quammen at kitware.com<mailto:cory.quammen at kitware.com>>
Sent: Tuesday, November 13, 2018 11:34 PM
To: Polly Pui
Cc: vtkusers
Subject: Re: [vtkusers] Extract csv row and column into points

Ah, so you want to use the vtkKMeansStatistics filter. That filter operates on vtkTable data. To use it, you don't need to create points at all. Instead, you can connect the  vtkDelimitedTextReader directly to the vtkKMeansStatistics filter like so:

vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
 vtkSmartPointer<vtkKMeansStatistics>::New();
kMeansStatistics->SetInputConnection(reader->GetOutputPort());
kMeansStatistics->SetColumnStatus("column1", 1);
kMeansStatistics->SetColumnStatus("column2", 1);
kMeansStatistics->SetColumnStatus("column3, 1);
kMeansStatistics->RequestSelectedColumns();
kMeansStatistics->SetAssessOption(true);
kMeansStatistics->SetDefaultNumberOfClusters(1);
//kMeansStatistics->SetMaxNumIterations(15);
kMeansStatistics->Update();

Here, I've altered your calls to SetColumnStatus() under the assumption you know the column names of interest.

HTH,
Cory


On Fri, Nov 9, 2018 at 10:16 AM Polly Pui <polly_sukting at hotmail.com<mailto:polly_sukting at hotmail.com>> wrote:
Hi,
Thanks for your reply.
Is it possible to have more elaborations from you?

How can I get the number of points from vtkTableToPolyData?
I got an error saying that vtkTableToPolyData has no members of GetNumberOfPoints.
I need those points to proceed to KmeansStatistics.

This is my code:
......
std::string inputFilename = argv[1];

vtkSmartPointer<vtkDelimitedTextReader> reader =
 vtkSmartPointer<vtkDelimitedTextReader>::New();
reader->SetFileName(inputFilename.c_str());
reader->SetFieldDelimiterCharacters(" ");
reader->DetectNumericColumnsOn();
reader->Update();
int numberOfRows = reader->GetOutput()->GetNumberOfRows();

vtkSmartPointer<vtkTableToPolyData> inputData =
 vtkSmartPointer<vtkTableToPolyData>::New();
inputData->SetInputConnection(reader->GetOutputPort);

for (int c = 0; c < 3; ++c)
{
 std::stringstream colName;
 colName << "coord " << c;
 vtkSmartPointer<vtkDoubleArray> doubleArray =
  vtkSmartPointer<vtkDoubleArray>::New();
 doubleArray->SetNumberOfComponents(1);
 doubleArray->SetName(colName.str().c_str());
 doubleArray->SetNumberOfTuples(inputData->GetNumberOfPoints());


 for (int r = 0; r < inputData->GetNumberOfPoints(); ++r)
 {
  double p[3];
  inputData->GetPoint(r, p);
  doubleArray->SetValue(r, p[c]);
 }
 inputData->AddColumn(doubleArray);
}

vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
 vtkSmartPointer<vtkKMeansStatistics>::New();

#if VTK_MAJOR_VERSION <= 5
kMeansStatistics->SetInput(vtkStatisticsAlgorithm::INPUT_DATA, inputData);
#else
kMeansStatistics->SetInputData(vtkStatisticsAlgorithm::INPUT_DATA, inputData);
#endif
kMeansStatistics->SetColumnStatus(inputData->GetColumnName(0), 1);
kMeansStatistics->SetColumnStatus(inputData->GetColumnName(1), 1);
kMeansStatistics->SetColumnStatus(inputData->GetColumnName(2), 1);
kMeansStatistics->RequestSelectedColumns();
kMeansStatistics->SetAssessOption(true);
kMeansStatistics->SetDefaultNumberOfClusters(1);
//kMeansStatistics->SetMaxNumIterations(15);
kMeansStatistics->Update();

Thanks again.

Regards,
Polly
________________________________
From: Cory Quammen <cory.quammen at kitware.com<mailto:cory.quammen at kitware.com>>
Sent: Friday, November 9, 2018 10:07 PM
To: Polly Pui
Cc: vtkusers
Subject: Re: [vtkusers] Extract csv row and column into points

vtkDelimitedTextReader -> vtkTableToPolyData is a pipeline that should make this much simpler.

On Fri, Nov 9, 2018 at 1:14 AM Polly Pui <polly_sukting at hotmail.com<mailto:polly_sukting at hotmail.com>> wrote:
Hi,
Is there any clue that i can extract the row and column data from a csv file and read them as points?
Currently I am using vtkpoints to read points by inserting points manually to my .cpp .
Is it possible for me to call the csv directly and read the data (eg. column 3-5, row 2-10)?

I attach my code here.
......
int main(int, char*[])
{

vtkSmartPointer<vtkPoints> points =
 vtkSmartPointer<vtkPoints>::New();
points->InsertNextPoint(8.4312, -36.489, -1500.7);
points->InsertNextPoint(8.8408, -37.726, -1500.4);
points->InsertNextPoint(11.372, -37.787, -1501.5);
points->InsertNextPoint(11.263, -36.384, -1501.9);
points->InsertNextPoint(9.3914, -40.819, -1500.8);
points->InsertNextPoint(11.685, -42.482, -1502.7);
points->InsertNextPoint(14.235, -38.096, -1503.5);
points->InsertNextPoint(13.972, -43.051, -1504.2);
points->InsertNextPoint(9.22, -43.904, -1504);

vtkSmartPointer<vtkTable> inputData =
 vtkSmartPointer<vtkTable>::New();
for (int c = 0; c < 3; ++c)
{
 std::stringstream colName;
 colName << "coord " << c;
 vtkSmartPointer<vtkDoubleArray> doubleArray =
  vtkSmartPointer<vtkDoubleArray>::New();
 doubleArray->SetNumberOfComponents(1);
 doubleArray->SetName(colName.str().c_str());
 doubleArray->SetNumberOfTuples(points->GetNumberOfPoints());

 for (int r = 0; r < points->GetNumberOfPoints(); ++r)
 {
  double p[3];
  points->GetPoint(r, p);
  doubleArray->SetValue(r, p[c]);
 }
 inputData->AddColumn(doubleArray);
}

Thank you very much.

Regards,
Polly
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Cory Quammen
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--
Cory Quammen
Staff R&D Engineer
Kitware, Inc.


--
Cory Quammen
Staff R&D Engineer
Kitware, Inc.


--
Cory Quammen
Staff R&D Engineer
Kitware, Inc.
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From cory.quammen at kitware.com  Mon Dec  3 09:18:01 2018
From: cory.quammen at kitware.com (Cory Quammen)
Date: Mon, 3 Dec 2018 09:18:01 -0500
Subject: [vtkusers] Extract csv row and column into points
In-Reply-To: <SL2PR04MB3273F58E486D73A34007437D8FAE0@SL2PR04MB3273.apcprd04.prod.outlook.com>
References: <PU1PR04MB224515848C5C382583A56FD18FC60@PU1PR04MB2245.apcprd04.prod.outlook.com>
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 <PU1PR04MB2245B467BC9D8479BFB9BBD08FDA0@PU1PR04MB2245.apcprd04.prod.outlook.com>
 <CAB5Fpx6bJdwqWApqLL6VX9ujvA=rmY4TGKbtCudHaaJv=5LbjQ@mail.gmail.com>
 <SL2PR04MB3273F58E486D73A34007437D8FAE0@SL2PR04MB3273.apcprd04.prod.outlook.com>
Message-ID: <CAB5Fpx5TZUm5u-EbyAO+sFSC9mG=W5repmimwozb2eKCC7MO1g@mail.gmail.com>

Polly,

To skip headers when reading the CSV file, call

vtkDelimitedTextReader::SetHaveHeaders(true);

The default behavior is to assume there is no header line.

HTH,
Cory
On Mon, Dec 3, 2018 at 9:11 AM Polly Pui <polly_sukting at hotmail.com> wrote:
>
> Thanks Cory, you are so helpful. I am trying to figure out how to skip the header of the csv file before calling for Kmeansclustering.
> I am getting there. If you have any idea on how to skip reading the header, please advice:)
>
> Thank you so much.
>
> Regards,
> Polly
> ________________________________
> From: Cory Quammen <cory.quammen at kitware.com>
> Sent: Wednesday, November 28, 2018 12:53 AM
> To: Polly Pui
> Cc: vtkusers; David Thompson
> Subject: Re: [vtkusers] Extract csv row and column into points
>
> Polly,
>
> It seems I was mistaken about the output of the vtkKMeansStatistics filter. It looks like it does not pass through the input columns with something like a cluster label. I have no experience with the filter, so I'm not sure how to guide you from here. David Thompson (CC'ed) would know more since he was an author of the filter. He may be able to help if he has time.
>
> Some resources that may help:
>
> Doxygen page:
> https://www.vtk.org/doc/nightly/html/classvtkKMeansStatistics.html#details
>
> Example:
> https://www.vtk.org/gitweb?p=VTK.git;a=blob;f=Examples/Statistics/ExampleKMeansStatistics.cxx
>
> Cory
>
> On Wed, Nov 21, 2018 at 1:16 AM Polly Pui <polly_sukting at hotmail.com> wrote:
>
> And also I tried to remove the lines in order to test if the columns are called successfully. I received the error stated "Failed to locate the columns to use for the point coordinates".
>
> These are the codes:
> std::string inputFilename = argv[1];
>
> vtkSmartPointer<vtkDelimitedTextReader> reader =
>  vtkSmartPointer<vtkDelimitedTextReader>::New();
> reader->SetFileName(inputFilename.c_str());
> reader->SetFieldDelimiterCharacters(",");
> reader->DetectNumericColumnsOn();
> //reader->GetHaveHeaders();
> reader->Update();
>
> reader->GetOutput()->Dump();
> ///////KmeansCluster
>
> vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
>  vtkSmartPointer<vtkKMeansStatistics>::New();
> kMeansStatistics->SetInputConnection(reader->GetOutputPort());
> kMeansStatistics->SetColumnStatus("X", 1);
> kMeansStatistics->SetColumnStatus("Y", 1);
> kMeansStatistics->SetColumnStatus("Z", 1);
> kMeansStatistics->RequestSelectedColumns();
> kMeansStatistics->SetAssessOption(true);
> kMeansStatistics->SetDefaultNumberOfClusters(5);
> //kMeansStatistics->SetLearnOption(1);//to learn the cluster value
> kMeansStatistics->SetMaxNumIterations(15);
> kMeansStatistics->Update();
>
> vtkSmartPointer<vtkTableToPolyData> t2pd = vtkSmartPointer<vtkTableToPolyData>::New();
> t2pd->SetInputConnection(kMeansStatistics->GetOutputPort());
> t2pd->SetXColumn("X");
> t2pd->SetYColumn("Y");
> t2pd->SetZColumn("Z");
>
> vtkSmartPointer<vtkPolyDataMapper> mapper =
>  vtkSmartPointer<vtkPolyDataMapper>::New();
> mapper->SetInputConnection(t2pd->GetOutputPort());
>
> vtkSmartPointer<vtkActor> actor =
>  vtkSmartPointer<vtkActor>::New();
> actor->SetMapper(mapper);
> actor->GetProperty()->SetPointSize(3);
> actor->GetProperty()->SetColor(1, 1, 1);
>
> vtkSmartPointer<vtkRenderer> renderer =
>  vtkSmartPointer<vtkRenderer>::New();
> vtkSmartPointer<vtkRenderWindow> renderWindow =
>  vtkSmartPointer<vtkRenderWindow>::New();
> renderWindow->AddRenderer(renderer);
> renderWindow->SetSize(640, 480);
>
> vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
>  vtkSmartPointer<vtkRenderWindowInteractor>::New();
> renderWindowInteractor->SetRenderWindow(renderWindow);
>
> renderer->AddActor(actor);
> renderer->SetBackground(0, 0, 0); // Background color black
>
> renderWindow->Render();
> renderWindowInteractor->Start();
>
> return EXIT_SUCCESS;
> }
>
> I supposed the column of interest to be called are "X", "Y" and "Z".
> Please advice.
> Thank you very much.
>
> Regards,
> Polly
> ________________________________
> From: vtkusers <vtkusers-bounces at public.kitware.com> on behalf of Polly Pui <polly_sukting at hotmail.com>
> Sent: Wednesday, November 21, 2018 2:01 PM
> To: Cory Quammen
> Cc: vtkusers
> Subject: Re: [vtkusers] Extract csv row and column into points
>
> Hi Cory,
> Thanks for your reply.
> I followed your advice and changed the lines as you mentioned.
> But I still couldn't get the output successfully.
>
> I would like to clarify if I called the column of interest correctly.
> Please refer to the attachment. The columns that to be called as X,Y,Z coordinates are named as "X", "Y", "Z".
> When i run the exe file. It failed to load and couldn't get the correct cluster.
>
> This is the codes that I am using.
> ..............
> int main(int argc, char* argv[])
> {
> std::string inputFilename = argv[1];
>
> vtkSmartPointer<vtkDelimitedTextReader> reader =
>  vtkSmartPointer<vtkDelimitedTextReader>::New();
> reader->SetFileName(inputFilename.c_str());
> reader->SetFieldDelimiterCharacters(",");
> reader->DetectNumericColumnsOn();
> //reader->GetHaveHeaders();
> reader->Update();
>
> ///////KmeansCluster
>
> vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
>  vtkSmartPointer<vtkKMeansStatistics>::New();
> kMeansStatistics->SetInputConnection(reader->GetOutputPort());
> kMeansStatistics->SetColumnStatus("X", 1);
> kMeansStatistics->SetColumnStatus("Y", 1);
> kMeansStatistics->SetColumnStatus("Z", 1);
> kMeansStatistics->RequestSelectedColumns();
> kMeansStatistics->SetAssessOption(true);
> kMeansStatistics->SetDefaultNumberOfClusters(5);
> //kMeansStatistics->SetLearnOption(1);//to learn the cluster value
> kMeansStatistics->SetMaxNumIterations(15);
> kMeansStatistics->Update();
>
> //// Display the results in CMD (each row)
> kMeansStatistics->GetOutput()->Dump();
>
> ////Group the points according to ID number
> vtkSmartPointer<vtkIntArray> clusterArray =
>  vtkSmartPointer<vtkIntArray>::New();
> clusterArray->SetNumberOfComponents(1);
> clusterArray->SetName("ClusterId");
>
> for (int r = 0; r < kMeansStatistics->GetOutput()->GetNumberOfRows(); r++)
> {
>  vtkVariant v = kMeansStatistics->GetOutput()->GetValue(r, kMeansStatistics->GetOutput()->GetNumberOfColumns() - 1);
>  std::cout << "Point " << r << " is in cluster " << v.ToInt() << std::endl;
>  clusterArray->InsertNextValue(v.ToInt());
> }
>
> //// Create a lookup table to map cell data to colors
> vtkSmartPointer<vtkLookupTable> lut =
>  vtkSmartPointer<vtkLookupTable>::New();
> int tableSize = (kMeansStatistics + 1, 10);
> lut->SetNumberOfTableValues(tableSize);
> lut->Build();
>
> ////ColorCells
> vtkSmartPointer<vtkNamedColors> colors =
>  vtkSmartPointer<vtkNamedColors>::New();
> lut->SetTableValue(0, colors->GetColor4d("Black").GetData());
> lut->SetTableValue(1, colors->GetColor4d("Banana").GetData());
> lut->SetTableValue(2, colors->GetColor4d("Tomato").GetData());
> lut->SetTableValue(3, colors->GetColor4d("Peacock").GetData());
> lut->SetTableValue(4, colors->GetColor4d("Lavender").GetData());
> lut->SetTableValue(5, colors->GetColor4d("Flesh").GetData());
> lut->SetTableValue(6, colors->GetColor4d("Raspberry").GetData());
> lut->SetTableValue(7, colors->GetColor4d("Salmon").GetData());
> lut->SetTableValue(8, colors->GetColor4d("Mint").GetData());
> lut->SetTableValue(9, colors->GetColor4d("Wheat").GetData());
>
> // Output the cluster centers
>
> vtkMultiBlockDataSet* outputMetaDS = vtkMultiBlockDataSet::SafeDownCast(kMeansStatistics->GetOutputDataObject(vtkStatisticsAlgorithm::OUTPUT_MODEL));
> vtkTable* outputMeta = vtkTable::SafeDownCast(outputMetaDS->GetBlock(0));
>
> vtkDoubleArray* coord0 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("X"));
> vtkDoubleArray* coord1 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Y"));
> vtkDoubleArray* coord2 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Z"));
>
> for (unsigned int i = 0; i < coord0->GetNumberOfTuples(); ++i)
> {
>  std::cout << coord0->GetValue(i) << " " << coord1->GetValue(i) << " " << coord2->GetValue(i) << std::endl;
> }
>
> vtkSmartPointer<vtkTableToPolyData> t2pd = vtkSmartPointer<vtkTableToPolyData>::New();
> t2pd->SetInputConnection(kMeansStatistics->GetOutputPort());
> t2pd->SetXColumn("X");
> t2pd->SetYColumn("Y");
> t2pd->SetZColumn("Z");
>
> vtkSmartPointer<vtkPolyDataMapper> mapper =
>  vtkSmartPointer<vtkPolyDataMapper>::New();
> mapper->SetInputConnection(t2pd->GetOutputPort());
>
> vtkSmartPointer<vtkActor> actor =
>  vtkSmartPointer<vtkActor>::New();
> actor->SetMapper(mapper);
> actor->GetProperty()->SetPointSize(3);
> actor->GetProperty()->SetColor(1, 1, 1);
>
> vtkSmartPointer<vtkRenderer> renderer =
>  vtkSmartPointer<vtkRenderer>::New();
> vtkSmartPointer<vtkRenderWindow> renderWindow =
>  vtkSmartPointer<vtkRenderWindow>::New();
> renderWindow->AddRenderer(renderer);
> renderWindow->SetSize(640, 480);
>
> vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
>  vtkSmartPointer<vtkRenderWindowInteractor>::New();
> renderWindowInteractor->SetRenderWindow(renderWindow);
>
> //renderer->AddActor(actor);
> renderer->SetBackground(0, 0, 0); // Background color black
>
> renderWindow->Render();
> renderWindowInteractor->Start();
>
> return EXIT_SUCCESS;
> }
> .........
> Please advice. Thank you again!
>
> Regards,
> Polly
>
> ________________________________
> From: Cory Quammen <cory.quammen at kitware.com>
> Sent: Monday, November 19, 2018 10:52 PM
> To: Polly Pui
> Cc: vtkusers
> Subject: Re: [vtkusers] Extract csv row and column into points
>
>
>
> On Thu, Nov 15, 2018 at 1:26 AM Polly Pui <polly_sukting at hotmail.com> wrote:
>
> Hi Cory,
> Thanks for your reply.
> I edited my codes by following your advice. However, I am not able to visualize the point of cluster and got an error message.
>
> I have a few questions here.
> Is it possible to call VTK unstructured grid data into vtkKmeansStatistics?
>
>
> No, vtkKMeansStatistics requires a vtkTable input (it is a subclass of vtkTableAlgorithm). vtkTable is different from a vtkPolyData, which is what you are trying to create. See more inline comments further down.
>
>
> Actually what i wanted to do is very simple.
> I want to read my csv or vtk file and then cluster the points using kmeansclustering.
> Initially, I extracted points from csv file manually and I could get my desired output. But it is too time consuming.
> Currently, I want to input the csv or vtk file and get the cluster automatically and store in a datasheet.
> I attach my code as follows:
>
> #include <vtkVersion.h>
> #include "library.h"
>
> #include <vtkSmartPointer.h>
> #include <vtkProperty.h>
> #include <vtkPointData.h>
> #include <vtkPolyData.h>
> #include <vtkXMLPolyDataWriter.h>
>
>
> std::string inputFilename = argv[1];
>
> vtkSmartPointer<vtkDelimitedTextReader> reader =
>  vtkSmartPointer<vtkDelimitedTextReader>::New();
> reader->SetFileName(inputFilename.c_str());
> reader->SetFieldDelimiterCharacters(",");
> reader->DetectNumericColumnsOn();
> reader->Update();
>
> ///////KmeansCluster
>
> vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
>  vtkSmartPointer<vtkKMeansStatistics>::New();
> kMeansStatistics->SetInputConnection(reader->GetOutputPort());
> kMeansStatistics->SetColumnStatus("Column 3", 1);
> kMeansStatistics->SetColumnStatus("Column 4", 1);
> kMeansStatistics->SetColumnStatus("Column 5", 1);
> kMeansStatistics->RequestSelectedColumns();
> kMeansStatistics->SetAssessOption(true);
> kMeansStatistics->SetDefaultNumberOfClusters(2);
> //kMeansStatistics->SetMaxNumIterations(15);
> kMeansStatistics->Update();
>
> // Display the results in CMD (each row)
> kMeansStatistics->GetOutput()->Dump();
>
>
>
>
> //Group the points according to ID number
> vtkSmartPointer<vtkIntArray> clusterArray =
>  vtkSmartPointer<vtkIntArray>::New();
> clusterArray->SetNumberOfComponents(1);
> clusterArray->SetName("ClusterId");
>
> for (int r = 0; r < kMeansStatistics->GetOutput()->GetNumberOfRows(); r++)
> {
>  vtkVariant v = kMeansStatistics->GetOutput()->GetValue(r, kMeansStatistics->GetOutput()->GetNumberOfColumns() - 1);
>  std::cout << "Point " << r << " is in cluster " << v.ToInt() << std::endl;
>  clusterArray->InsertNextValue(v.ToInt());
> }
>
> // Create a lookup table to map cell data to colors
> vtkSmartPointer<vtkLookupTable> lut =
>  vtkSmartPointer<vtkLookupTable>::New();
> int tableSize = (kMeansStatistics + 1, 10);
> lut->SetNumberOfTableValues(tableSize);
> lut->Build();
>
> //ColorCells
> vtkSmartPointer<vtkNamedColors> colors =
>  vtkSmartPointer<vtkNamedColors>::New();
> lut->SetTableValue(0, colors->GetColor4d("Black").GetData());
> lut->SetTableValue(1, colors->GetColor4d("Banana").GetData());
> lut->SetTableValue(2, colors->GetColor4d("Tomato").GetData());
> lut->SetTableValue(3, colors->GetColor4d("Peacock").GetData());
> lut->SetTableValue(4, colors->GetColor4d("Lavender").GetData());
> lut->SetTableValue(5, colors->GetColor4d("Flesh").GetData());
> lut->SetTableValue(6, colors->GetColor4d("Raspberry").GetData());
> lut->SetTableValue(7, colors->GetColor4d("Salmon").GetData());
> lut->SetTableValue(8, colors->GetColor4d("Mint").GetData());
> lut->SetTableValue(9, colors->GetColor4d("Wheat").GetData());
>
> // Output the cluster centers
>
> vtkMultiBlockDataSet* outputMetaDS = vtkMultiBlockDataSet::SafeDownCast(kMeansStatistics->GetOutputDataObject(vtkStatisticsAlgorithm::OUTPUT_MODEL));
> vtkSmartPointer<vtkTable> outputMeta = vtkTable::SafeDownCast(outputMetaDS->GetBlock(0));
> //vtkSmartPointer<vtkTable> outputMeta = vtkTable::SafeDownCast( outputMetaDS->GetBlock( 1 ) );
> vtkDoubleArray* coord0 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 0"));
> vtkDoubleArray* coord1 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 1"));
> vtkDoubleArray* coord2 = vtkDoubleArray::SafeDownCast(outputMeta->GetColumnByName("Column 2"));
>
> for (unsigned int i = 0; i < coord0->GetNumberOfTuples(); ++i)
> {
>  std::cout << coord0->GetValue(i) << " " << coord1->GetValue(i) << " " << coord2->GetValue(i) << std::endl;
>
> }
>
> vtkSmartPointer<vtkPolyData> polydata =
>  vtkSmartPointer<vtkPolyData>::New();
> polydata->GetPointData()->SetScalars(clusterArray);
>
>
> The below won't work. vtkKMeansStatistics produces a vtkTable, while the vtkPolyDataMapper requires a vtkPolyData. To convert a vtkTable to a vtkPolyData, which is the key piece you are missing, use vtkTableToPolyData. This class iterates over the rows, treats the columns you designate as X, Y, Z coordinates, and adds the remaining columns as point data arrays in the output vtkPolyData.
>
> It will look something like this:
>
> vtkSmartPointer<vtkTableToPolyData> t2pd = vtkSmartPointer<vtkTableToPolyData>::New();
> t2pd->SetInputConnection(kMeansStatistics->GetOutputPort());
> t2pd->SetXColumn("name of column to be used as x-coordinate");
> t2pd->SetYColumn("name of column to be used as y-coordinate");
> t2pd->SetZColumn("name of column to be used as z-coordinate");
>
> Now, change, the code below from:
>
>
> vtkSmartPointer<vtkPolyDataMapper> mapper =
>  vtkSmartPointer<vtkPolyDataMapper>::New();
> mapper->SetInputConnection(kMeansStatistics->GetOutputPort());
>
>
> to
>
> vtkSmartPointer<vtkPolyDataMapper> mapper =
>  vtkSmartPointer<vtkPolyDataMapper>::New();
> mapper->SetInputConnection(t2pd->GetOutputPort());
>
> That should do it.
>
> Cory
>
>
> vtkSmartPointer<vtkActor> actor =
>  vtkSmartPointer<vtkActor>::New();
> actor->SetMapper(mapper);
> actor->GetProperty()->SetPointSize(3);
> actor->GetProperty()->SetColor(1, 0, 0);
>
> vtkSmartPointer<vtkRenderer> renderer =
>  vtkSmartPointer<vtkRenderer>::New();
> vtkSmartPointer<vtkRenderWindow> renderWindow =
>  vtkSmartPointer<vtkRenderWindow>::New();
> renderWindow->AddRenderer(renderer);
> renderWindow->SetSize(640, 480);
>
> vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
>  vtkSmartPointer<vtkRenderWindowInteractor>::New();
> renderWindowInteractor->SetRenderWindow(renderWindow);
>
> renderer->AddActor(actor);
> renderer->SetBackground(0, 0, 0); // Background color black
>
> renderWindow->Render();
> renderWindowInteractor->Start();
>
> return EXIT_SUCCESS;
> }
>
>
> Thank you so much.
>
> Regards,
> Polly
> ________________________________
> From: Cory Quammen <cory.quammen at kitware.com>
> Sent: Tuesday, November 13, 2018 11:34 PM
> To: Polly Pui
> Cc: vtkusers
> Subject: Re: [vtkusers] Extract csv row and column into points
>
> Ah, so you want to use the vtkKMeansStatistics filter. That filter operates on vtkTable data. To use it, you don't need to create points at all. Instead, you can connect the  vtkDelimitedTextReader directly to the vtkKMeansStatistics filter like so:
>
> vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
>  vtkSmartPointer<vtkKMeansStatistics>::New();
> kMeansStatistics->SetInputConnection(reader->GetOutputPort());
> kMeansStatistics->SetColumnStatus("column1", 1);
> kMeansStatistics->SetColumnStatus("column2", 1);
> kMeansStatistics->SetColumnStatus("column3, 1);
> kMeansStatistics->RequestSelectedColumns();
> kMeansStatistics->SetAssessOption(true);
> kMeansStatistics->SetDefaultNumberOfClusters(1);
> //kMeansStatistics->SetMaxNumIterations(15);
> kMeansStatistics->Update();
>
> Here, I've altered your calls to SetColumnStatus() under the assumption you know the column names of interest.
>
> HTH,
> Cory
>
>
> On Fri, Nov 9, 2018 at 10:16 AM Polly Pui <polly_sukting at hotmail.com> wrote:
>
> Hi,
> Thanks for your reply.
> Is it possible to have more elaborations from you?
>
> How can I get the number of points from vtkTableToPolyData?
> I got an error saying that vtkTableToPolyData has no members of GetNumberOfPoints.
> I need those points to proceed to KmeansStatistics.
>
> This is my code:
> ......
> std::string inputFilename = argv[1];
>
> vtkSmartPointer<vtkDelimitedTextReader> reader =
>  vtkSmartPointer<vtkDelimitedTextReader>::New();
> reader->SetFileName(inputFilename.c_str());
> reader->SetFieldDelimiterCharacters(" ");
> reader->DetectNumericColumnsOn();
> reader->Update();
> int numberOfRows = reader->GetOutput()->GetNumberOfRows();
>
> vtkSmartPointer<vtkTableToPolyData> inputData =
>  vtkSmartPointer<vtkTableToPolyData>::New();
> inputData->SetInputConnection(reader->GetOutputPort);
>
> for (int c = 0; c < 3; ++c)
> {
>  std::stringstream colName;
>  colName << "coord " << c;
>  vtkSmartPointer<vtkDoubleArray> doubleArray =
>   vtkSmartPointer<vtkDoubleArray>::New();
>  doubleArray->SetNumberOfComponents(1);
>  doubleArray->SetName(colName.str().c_str());
>  doubleArray->SetNumberOfTuples(inputData->GetNumberOfPoints());
>
>
>  for (int r = 0; r < inputData->GetNumberOfPoints(); ++r)
>  {
>   double p[3];
>   inputData->GetPoint(r, p);
>   doubleArray->SetValue(r, p[c]);
>  }
>  inputData->AddColumn(doubleArray);
> }
>
> vtkSmartPointer<vtkKMeansStatistics> kMeansStatistics =
>  vtkSmartPointer<vtkKMeansStatistics>::New();
>
> #if VTK_MAJOR_VERSION <= 5
> kMeansStatistics->SetInput(vtkStatisticsAlgorithm::INPUT_DATA, inputData);
> #else
> kMeansStatistics->SetInputData(vtkStatisticsAlgorithm::INPUT_DATA, inputData);
> #endif
> kMeansStatistics->SetColumnStatus(inputData->GetColumnName(0), 1);
> kMeansStatistics->SetColumnStatus(inputData->GetColumnName(1), 1);
> kMeansStatistics->SetColumnStatus(inputData->GetColumnName(2), 1);
> kMeansStatistics->RequestSelectedColumns();
> kMeansStatistics->SetAssessOption(true);
> kMeansStatistics->SetDefaultNumberOfClusters(1);
> //kMeansStatistics->SetMaxNumIterations(15);
> kMeansStatistics->Update();
>
> Thanks again.
>
> Regards,
> Polly
> ________________________________
> From: Cory Quammen <cory.quammen at kitware.com>
> Sent: Friday, November 9, 2018 10:07 PM
> To: Polly Pui
> Cc: vtkusers
> Subject: Re: [vtkusers] Extract csv row and column into points
>
> vtkDelimitedTextReader -> vtkTableToPolyData is a pipeline that should make this much simpler.
>
> On Fri, Nov 9, 2018 at 1:14 AM Polly Pui <polly_sukting at hotmail.com> wrote:
>
> Hi,
> Is there any clue that i can extract the row and column data from a csv file and read them as points?
> Currently I am using vtkpoints to read points by inserting points manually to my .cpp .
> Is it possible for me to call the csv directly and read the data (eg. column 3-5, row 2-10)?
>
> I attach my code here.
> ......
> int main(int, char*[])
> {
>
> vtkSmartPointer<vtkPoints> points =
>  vtkSmartPointer<vtkPoints>::New();
> points->InsertNextPoint(8.4312, -36.489, -1500.7);
> points->InsertNextPoint(8.8408, -37.726, -1500.4);
> points->InsertNextPoint(11.372, -37.787, -1501.5);
> points->InsertNextPoint(11.263, -36.384, -1501.9);
> points->InsertNextPoint(9.3914, -40.819, -1500.8);
> points->InsertNextPoint(11.685, -42.482, -1502.7);
> points->InsertNextPoint(14.235, -38.096, -1503.5);
> points->InsertNextPoint(13.972, -43.051, -1504.2);
> points->InsertNextPoint(9.22, -43.904, -1504);
>
> vtkSmartPointer<vtkTable> inputData =
>  vtkSmartPointer<vtkTable>::New();
> for (int c = 0; c < 3; ++c)
> {
>  std::stringstream colName;
>  colName << "coord " << c;
>  vtkSmartPointer<vtkDoubleArray> doubleArray =
>   vtkSmartPointer<vtkDoubleArray>::New();
>  doubleArray->SetNumberOfComponents(1);
>  doubleArray->SetName(colName.str().c_str());
>  doubleArray->SetNumberOfTuples(points->GetNumberOfPoints());
>
>  for (int r = 0; r < points->GetNumberOfPoints(); ++r)
>  {
>   double p[3];
>   points->GetPoint(r, p);
>   doubleArray->SetValue(r, p[c]);
>  }
>  inputData->AddColumn(doubleArray);
> }
>
> Thank you very much.
>
> Regards,
> Polly
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
>
>
> --
> Cory Quammen
> Staff R&D Engineer
> Kitware, Inc.
>
>
>
> --
> Cory Quammen
> Staff R&D Engineer
> Kitware, Inc.
>
>
>
> --
> Cory Quammen
> Staff R&D Engineer
> Kitware, Inc.
>
>
>
> --
> Cory Quammen
> Staff R&D Engineer
> Kitware, Inc.



-- 
Cory Quammen
Staff R&D Engineer
Kitware, Inc.

From dave.demarle at kitware.com  Mon Dec  3 10:02:37 2018
From: dave.demarle at kitware.com (David E DeMarle)
Date: Mon, 3 Dec 2018 10:02:37 -0500
Subject: [vtkusers] isosurface update issue
In-Reply-To: <1543674451900-0.post@n5.nabble.com>
References: <1543554725951-0.post@n5.nabble.com>
 <CANjZAi_3UKRKN+37zg45Xm73W1vqmuRTEiKHAuVuoisFrhO8Rg@mail.gmail.com>
 <1543674451900-0.post@n5.nabble.com>
Message-ID: <CANjZAi-=if6-r8-P1XMFnZfsf58jahs60yN1K0zsX9qJqDy-7A@mail.gmail.com>

>
> It may not be a good idea to delete the actor and make a new one in every
> call.


It can work, but in addition to deleting the old actor, you have to call
renderer->RemoveActor(oldactor); Otherwise the renderer's reference keeps
the original actor alive.

David E DeMarle
Kitware, Inc.
Principal Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Sat, Dec 1, 2018 at 9:27 AM newcfd via vtkusers <
vtkusers at public.kitware.com> wrote:

> Thanks for your reply. mapSphere was a typing error and should be mapper.
> I made the following changes and still have the same problem.
>
> void MyApp::redraw( const double value )
> {
>     if ( m_pActor == nullptr )
>     {
>        m_pActor = vtkActor::New();
>       vtkSmartPointer<vtkPolyDataMapper> mapper =
> vtkSmartPointer<vtkPolyDataMapper>::New();
>        mapper->SetScalarRange(0.0, 1.0);
>        m_pActor->SetMapper( mapper );
>
>        renderer->AddActor( m_pActor );
>        renderer->SetBackground(1,1,1); // Background color white
>    }
>
>    vtkStructuredGrid * mesh =...
>
>   vtkSmartPointer<vtkContourFilter> filter =
>   vtkSmartPointer<vtkContourFilter>::New();
>   filter->SetInputData( mesh );
>   filter->SetNumberOfContours( 1 );
>   filter->Setvalue( 0, value ); // value is passed in
>
>   m_pActor->GetMapper()->SetInputConnection( filter->GetOutputPort() );
>   renderWindow->Render();
> }
>
> It may not be a good idea to delete the actor and make a new one in every
> call.
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From ivandiegorodriguez at gmail.com  Mon Dec  3 10:46:46 2018
From: ivandiegorodriguez at gmail.com (ivan rodriguez)
Date: Mon, 3 Dec 2018 16:46:46 +0100
Subject: [vtkusers] key press event in vtkWeb
Message-ID: <CAOJ-3OR4Y3AFfG2C0wJ91opEGW1JE_0p_ekCoZJTgiUAsecWUg@mail.gmail.com>

Hello,

I'm using the module vtkWeb for Remote Rendering, following this simple
python example:

*https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py
<https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py>*

and I have modified it in order to include a keyPress event. The code works
but the
key event is not working . Please find my code below (the only modification
from the link is the class MyInteractorStyle ).

I'll really appreciate any help with this!

Thanks !!





##########################################################################
##########################################################################

# import to process args
import sys
import os

# import vtk modules.
import vtk
from vtk.web import protocols
from vtk.web import wslink as vtk_wslink
from wslink import server

try:
    import argparse
except ImportError:
    # since  Python 2.6 and earlier don't have argparse, we simply provide
    # the source for the same as _argparse and we use it instead.
    from vtk.util import _argparse as argparse

#
=============================================================================
# Create custom ServerProtocol class to handle clients requests
#
=============================================================================


class MyInteractorStyle(vtk.vtkInteractorStyleTrackballCamera):

    def __init__(self,renderer, cone):
        self.parent = renderer.GetInteractor()
self.resolution=5
self.cone = cone

        self.AddObserver("KeyPressEvent",self.keyPressEvent)

    def keyPressEvent(self,obj,event):
        key = self.parent.GetKeySym()
        if key == 'l':
    print(key)
    self.cone.SetResolution(self.resolution)
    self.resolution+=1
        return




class _WebCone(vtk_wslink.ServerProtocol):

    # Application configuration
    view    = None
    authKey = "wslink-secret"

    def initialize(self):
        global renderer, renderWindow, renderWindowInteractor, cone,
mapper, actor

        # Bring used components
        self.registerVtkWebProtocol(protocols.vtkWebMouseHandler())
        self.registerVtkWebProtocol(protocols.vtkWebViewPort())
        self.registerVtkWebProtocol(protocols.vtkWebViewPortImageDelivery())

self.registerVtkWebProtocol(protocols.vtkWebViewPortGeometryDelivery())

        # Update authentication key to use
        self.updateSecret(_WebCone.authKey)

        # Create default pipeline (Only once for all the session)
        if not _WebCone.view:
            # VTK specific code
            renderer = vtk.vtkRenderer()
            renderWindow = vtk.vtkRenderWindow()
            renderWindow.AddRenderer(renderer)

            renderWindowInteractor = vtk.vtkRenderWindowInteractor()
            renderWindowInteractor.SetRenderWindow(renderWindow)



            cone = vtk.vtkConeSource()
            mapper = vtk.vtkPolyDataMapper()
            actor = vtk.vtkActor()

            mapper.SetInputConnection(cone.GetOutputPort())
            actor.SetMapper(mapper)


renderWindowInteractor.SetInteractorStyle(MyInteractorStyle(renderWindow,
cone))

            renderer.AddActor(actor)
            renderer.ResetCamera()
            renderWindow.Render()

            # VTK Web application specific
            _WebCone.view = renderWindow
            self.getApplication().GetObjectIdMap().SetActiveObject("VIEW",
renderWindow)

  #  renderWindowInteractor.Start()

#
=============================================================================
# Main: Parse args and start server
#
=============================================================================

if __name__ == "__main__":
    # Create argument parser
    parser = argparse.ArgumentParser(description="VTK/Web Cone
web-application")

    # Add default arguments
    server.add_arguments(parser)

    # Extract arguments
    args = parser.parse_args()

    # Configure our current application
    _WebCone.authKey = args.authKey

    # Start server
    server.start_webserver(options=args, protocol=_WebCone)
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From sebastien.jourdain at kitware.com  Mon Dec  3 10:54:03 2018
From: sebastien.jourdain at kitware.com (Sebastien Jourdain)
Date: Mon, 3 Dec 2018 08:54:03 -0700
Subject: [vtkusers] key press event in vtkWeb
In-Reply-To: <CAOJ-3OR4Y3AFfG2C0wJ91opEGW1JE_0p_ekCoZJTgiUAsecWUg@mail.gmail.com>
References: <CAOJ-3OR4Y3AFfG2C0wJ91opEGW1JE_0p_ekCoZJTgiUAsecWUg@mail.gmail.com>
Message-ID: <CABObKxczcdWRPySL9HvYMRLY1WdL8bQ=YE8rrQdzcpMd36zq0w@mail.gmail.com>

The event handling needs to happen on the client side (JS) which should
then trigger a RPC call to the server to adjust the resolution of the
server data. I don't think we register any key listener in the browser
that's why they don't get forwarded to the server.

On Mon, Dec 3, 2018 at 8:47 AM ivan rodriguez <ivandiegorodriguez at gmail.com>
wrote:

> Hello,
>
> I'm using the module vtkWeb for Remote Rendering, following this simple
> python example:
>
> *https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py
> <https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py>*
>
> and I have modified it in order to include a keyPress event. The code
> works but the
> key event is not working . Please find my code below (the only
> modification from the link is the class MyInteractorStyle ).
>
> I'll really appreciate any help with this!
>
> Thanks !!
>
>
>
>
>
> ##########################################################################
> ##########################################################################
>
> # import to process args
> import sys
> import os
>
> # import vtk modules.
> import vtk
> from vtk.web import protocols
> from vtk.web import wslink as vtk_wslink
> from wslink import server
>
> try:
>     import argparse
> except ImportError:
>     # since  Python 2.6 and earlier don't have argparse, we simply provide
>     # the source for the same as _argparse and we use it instead.
>     from vtk.util import _argparse as argparse
>
> #
> =============================================================================
> # Create custom ServerProtocol class to handle clients requests
> #
> =============================================================================
>
>
> class MyInteractorStyle(vtk.vtkInteractorStyleTrackballCamera):
>
>     def __init__(self,renderer, cone):
>         self.parent = renderer.GetInteractor()
> self.resolution=5
> self.cone = cone
>
>         self.AddObserver("KeyPressEvent",self.keyPressEvent)
>
>     def keyPressEvent(self,obj,event):
>         key = self.parent.GetKeySym()
>         if key == 'l':
>     print(key)
>     self.cone.SetResolution(self.resolution)
>     self.resolution+=1
>         return
>
>
>
>
> class _WebCone(vtk_wslink.ServerProtocol):
>
>     # Application configuration
>     view    = None
>     authKey = "wslink-secret"
>
>     def initialize(self):
>         global renderer, renderWindow, renderWindowInteractor, cone,
> mapper, actor
>
>         # Bring used components
>         self.registerVtkWebProtocol(protocols.vtkWebMouseHandler())
>         self.registerVtkWebProtocol(protocols.vtkWebViewPort())
>
> self.registerVtkWebProtocol(protocols.vtkWebViewPortImageDelivery())
>
> self.registerVtkWebProtocol(protocols.vtkWebViewPortGeometryDelivery())
>
>         # Update authentication key to use
>         self.updateSecret(_WebCone.authKey)
>
>         # Create default pipeline (Only once for all the session)
>         if not _WebCone.view:
>             # VTK specific code
>             renderer = vtk.vtkRenderer()
>             renderWindow = vtk.vtkRenderWindow()
>             renderWindow.AddRenderer(renderer)
>
>             renderWindowInteractor = vtk.vtkRenderWindowInteractor()
>             renderWindowInteractor.SetRenderWindow(renderWindow)
>
>
>
>             cone = vtk.vtkConeSource()
>             mapper = vtk.vtkPolyDataMapper()
>             actor = vtk.vtkActor()
>
>             mapper.SetInputConnection(cone.GetOutputPort())
>             actor.SetMapper(mapper)
>
>
> renderWindowInteractor.SetInteractorStyle(MyInteractorStyle(renderWindow,
> cone))
>
>             renderer.AddActor(actor)
>             renderer.ResetCamera()
>             renderWindow.Render()
>
>             # VTK Web application specific
>             _WebCone.view = renderWindow
>             self.getApplication().GetObjectIdMap().SetActiveObject("VIEW",
> renderWindow)
>
>   #  renderWindowInteractor.Start()
>
> #
> =============================================================================
> # Main: Parse args and start server
> #
> =============================================================================
>
> if __name__ == "__main__":
>     # Create argument parser
>     parser = argparse.ArgumentParser(description="VTK/Web Cone
> web-application")
>
>     # Add default arguments
>     server.add_arguments(parser)
>
>     # Extract arguments
>     args = parser.parse_args()
>
>     # Configure our current application
>     _WebCone.authKey = args.authKey
>
>     # Start server
>     server.start_webserver(options=args, protocol=_WebCone)
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From andrea.gavana at gmail.com  Mon Dec  3 11:09:38 2018
From: andrea.gavana at gmail.com (Andrea Gavana)
Date: Mon, 3 Dec 2018 17:09:38 +0100
Subject: [vtkusers] vtkProgressBar attached to an actor
Message-ID: <CAEf70bxGKBKwiRW8viniAV2iLHC71HDhfcDVhqfuXDXpVGeu0w@mail.gmail.com>

Hello everyone,

    I?ve been googling around without much success until now, so I am
turning to this kind mailing list for suggestions.

I have a 3D scene with multiple unstructured grids and some STL actors at
defined positions (in 3D). I would like to be able to ?attach? a progress
bar to each of these STL actors - as my scene in rendered in a time
dependent way, with the user able to go back and forth in time, it would
make a nice touch for what I?m showing.

Now, it seems to me vtkProgressBarWidget is a 2D animal, so I?m unclear how
I can place it below the STL actor and anche it there even if the user
zooms/pans the 3D window.

Maybe what I?m trying to accomplish is simply not possible, but I?m open to
all suggestions you may have.

Thank you in advance.

Andrea.
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From ivandiegorodriguez at gmail.com  Mon Dec  3 11:22:28 2018
From: ivandiegorodriguez at gmail.com (ivan rodriguez)
Date: Mon, 3 Dec 2018 17:22:28 +0100
Subject: [vtkusers] key press event in vtkWeb
In-Reply-To: <CABObKxeQuER5Sw6tHg6JNWN_7BXJVikY6W7vh4GOLUPFBYohog@mail.gmail.com>
References: <CAOJ-3OR4Y3AFfG2C0wJ91opEGW1JE_0p_ekCoZJTgiUAsecWUg@mail.gmail.com>
 <CABObKxczcdWRPySL9HvYMRLY1WdL8bQ=YE8rrQdzcpMd36zq0w@mail.gmail.com>
 <CAOJ-3OR+RpGGQmL2a-D330cqtcL7f6BSoavr0f-4ZeqarJMaUA@mail.gmail.com>
 <CABObKxeQuER5Sw6tHg6JNWN_7BXJVikY6W7vh4GOLUPFBYohog@mail.gmail.com>
Message-ID: <CAOJ-3OSrLfjTZOfQk1-98a+M_2BRAjyEN1-AM==ke8QXOXzEiA@mail.gmail.com>

Thanks for the explanation! I don't really know how to add a listener on
the client side so I'll really appreciate any help with that.  Do you have
some example or do you know if there are some examples online about that?







On Mon, Dec 3, 2018 at 5:12 PM Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> I'm not saying it is not the way to go. You just need to add a listener on
> the client side for the keyPress and forward that to the server.
> That's it. Nothing more than that.
>
> On Mon, Dec 3, 2018 at 9:06 AM ivan rodriguez <
> ivandiegorodriguez at gmail.com> wrote:
>
>> Thanks for the quick response!
>>
>> I have an application written in VTK doing an animation through a
>> timerCallback and using key events and I wanted to have a similar version
>> for the browser.
>> So if vtkWeb is not the right way to go, do you know if vtk.js could be a
>> good option for that?
>>
>> Thanks!
>>
>> On Mon, Dec 3, 2018 at 4:54 PM Sebastien Jourdain <
>> sebastien.jourdain at kitware.com> wrote:
>>
>>> The event handling needs to happen on the client side (JS) which should
>>> then trigger a RPC call to the server to adjust the resolution of the
>>> server data. I don't think we register any key listener in the browser
>>> that's why they don't get forwarded to the server.
>>>
>>> On Mon, Dec 3, 2018 at 8:47 AM ivan rodriguez <
>>> ivandiegorodriguez at gmail.com> wrote:
>>>
>>>> Hello,
>>>>
>>>> I'm using the module vtkWeb for Remote Rendering, following this simple
>>>> python example:
>>>>
>>>> *https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py
>>>> <https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py>*
>>>>
>>>> and I have modified it in order to include a keyPress event. The code
>>>> works but the
>>>> key event is not working . Please find my code below (the only
>>>> modification from the link is the class MyInteractorStyle ).
>>>>
>>>> I'll really appreciate any help with this!
>>>>
>>>> Thanks !!
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> ##########################################################################
>>>>
>>>> ##########################################################################
>>>>
>>>> # import to process args
>>>> import sys
>>>> import os
>>>>
>>>> # import vtk modules.
>>>> import vtk
>>>> from vtk.web import protocols
>>>> from vtk.web import wslink as vtk_wslink
>>>> from wslink import server
>>>>
>>>> try:
>>>>     import argparse
>>>> except ImportError:
>>>>     # since  Python 2.6 and earlier don't have argparse, we simply
>>>> provide
>>>>     # the source for the same as _argparse and we use it instead.
>>>>     from vtk.util import _argparse as argparse
>>>>
>>>> #
>>>> =============================================================================
>>>> # Create custom ServerProtocol class to handle clients requests
>>>> #
>>>> =============================================================================
>>>>
>>>>
>>>> class MyInteractorStyle(vtk.vtkInteractorStyleTrackballCamera):
>>>>
>>>>     def __init__(self,renderer, cone):
>>>>         self.parent = renderer.GetInteractor()
>>>> self.resolution=5
>>>> self.cone = cone
>>>>
>>>>         self.AddObserver("KeyPressEvent",self.keyPressEvent)
>>>>
>>>>     def keyPressEvent(self,obj,event):
>>>>         key = self.parent.GetKeySym()
>>>>         if key == 'l':
>>>>     print(key)
>>>>     self.cone.SetResolution(self.resolution)
>>>>     self.resolution+=1
>>>>         return
>>>>
>>>>
>>>>
>>>>
>>>> class _WebCone(vtk_wslink.ServerProtocol):
>>>>
>>>>     # Application configuration
>>>>     view    = None
>>>>     authKey = "wslink-secret"
>>>>
>>>>     def initialize(self):
>>>>         global renderer, renderWindow, renderWindowInteractor, cone,
>>>> mapper, actor
>>>>
>>>>         # Bring used components
>>>>         self.registerVtkWebProtocol(protocols.vtkWebMouseHandler())
>>>>         self.registerVtkWebProtocol(protocols.vtkWebViewPort())
>>>>
>>>> self.registerVtkWebProtocol(protocols.vtkWebViewPortImageDelivery())
>>>>
>>>> self.registerVtkWebProtocol(protocols.vtkWebViewPortGeometryDelivery())
>>>>
>>>>         # Update authentication key to use
>>>>         self.updateSecret(_WebCone.authKey)
>>>>
>>>>         # Create default pipeline (Only once for all the session)
>>>>         if not _WebCone.view:
>>>>             # VTK specific code
>>>>             renderer = vtk.vtkRenderer()
>>>>             renderWindow = vtk.vtkRenderWindow()
>>>>             renderWindow.AddRenderer(renderer)
>>>>
>>>>             renderWindowInteractor = vtk.vtkRenderWindowInteractor()
>>>>             renderWindowInteractor.SetRenderWindow(renderWindow)
>>>>
>>>>
>>>>
>>>>             cone = vtk.vtkConeSource()
>>>>             mapper = vtk.vtkPolyDataMapper()
>>>>             actor = vtk.vtkActor()
>>>>
>>>>             mapper.SetInputConnection(cone.GetOutputPort())
>>>>             actor.SetMapper(mapper)
>>>>
>>>>
>>>> renderWindowInteractor.SetInteractorStyle(MyInteractorStyle(renderWindow,
>>>> cone))
>>>>
>>>>             renderer.AddActor(actor)
>>>>             renderer.ResetCamera()
>>>>             renderWindow.Render()
>>>>
>>>>             # VTK Web application specific
>>>>             _WebCone.view = renderWindow
>>>>
>>>> self.getApplication().GetObjectIdMap().SetActiveObject("VIEW", renderWindow)
>>>>
>>>>   #  renderWindowInteractor.Start()
>>>>
>>>> #
>>>> =============================================================================
>>>> # Main: Parse args and start server
>>>> #
>>>> =============================================================================
>>>>
>>>> if __name__ == "__main__":
>>>>     # Create argument parser
>>>>     parser = argparse.ArgumentParser(description="VTK/Web Cone
>>>> web-application")
>>>>
>>>>     # Add default arguments
>>>>     server.add_arguments(parser)
>>>>
>>>>     # Extract arguments
>>>>     args = parser.parse_args()
>>>>
>>>>     # Configure our current application
>>>>     _WebCone.authKey = args.authKey
>>>>
>>>>     # Start server
>>>>     server.start_webserver(options=args, protocol=_WebCone)
>>>>
>>>> _______________________________________________
>>>> Powered by www.kitware.com
>>>>
>>>> Visit other Kitware open-source projects at
>>>> http://www.kitware.com/opensource/opensource.html
>>>>
>>>> Please keep messages on-topic and check the VTK FAQ at:
>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>
>>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>>
>>>> Follow this link to subscribe/unsubscribe:
>>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>>
>>>
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From sebastien.jourdain at kitware.com  Mon Dec  3 11:32:51 2018
From: sebastien.jourdain at kitware.com (Sebastien Jourdain)
Date: Mon, 3 Dec 2018 09:32:51 -0700
Subject: [vtkusers] key press event in vtkWeb
In-Reply-To: <CAOJ-3OSrLfjTZOfQk1-98a+M_2BRAjyEN1-AM==ke8QXOXzEiA@mail.gmail.com>
References: <CAOJ-3OR4Y3AFfG2C0wJ91opEGW1JE_0p_ekCoZJTgiUAsecWUg@mail.gmail.com>
 <CABObKxczcdWRPySL9HvYMRLY1WdL8bQ=YE8rrQdzcpMd36zq0w@mail.gmail.com>
 <CAOJ-3OR+RpGGQmL2a-D330cqtcL7f6BSoavr0f-4ZeqarJMaUA@mail.gmail.com>
 <CABObKxeQuER5Sw6tHg6JNWN_7BXJVikY6W7vh4GOLUPFBYohog@mail.gmail.com>
 <CAOJ-3OSrLfjTZOfQk1-98a+M_2BRAjyEN1-AM==ke8QXOXzEiA@mail.gmail.com>
Message-ID: <CABObKxeE=7LHS5tNVUeV3N6J+ygRy+uL2ACH5BTiO8r3pGyfDQ@mail.gmail.com>

Below is an example, but Google should be able to help you also on the JS
side...
https://github.com/Kitware/vtk-js/blob/master/Sources/Rendering/Core/RenderWindowInteractor/index.js#L214-L222

Then for the RPC part you can find some inspiration there even if it is on
ParaView
https://github.com/Kitware/paraviewweb-examples

Just FYI, if that make sense for what you are trying to do, we have support
contract that could speed up the process on your end.

HTH,

Seb

On Mon, Dec 3, 2018 at 9:22 AM ivan rodriguez <ivandiegorodriguez at gmail.com>
wrote:

> Thanks for the explanation! I don't really know how to add a listener on
> the client side so I'll really appreciate any help with that.  Do you have
> some example or do you know if there are some examples online about that?
>
>
>
>
>
>
>
> On Mon, Dec 3, 2018 at 5:12 PM Sebastien Jourdain <
> sebastien.jourdain at kitware.com> wrote:
>
>> I'm not saying it is not the way to go. You just need to add a listener
>> on the client side for the keyPress and forward that to the server.
>> That's it. Nothing more than that.
>>
>> On Mon, Dec 3, 2018 at 9:06 AM ivan rodriguez <
>> ivandiegorodriguez at gmail.com> wrote:
>>
>>> Thanks for the quick response!
>>>
>>> I have an application written in VTK doing an animation through a
>>> timerCallback and using key events and I wanted to have a similar version
>>> for the browser.
>>> So if vtkWeb is not the right way to go, do you know if vtk.js could be
>>> a good option for that?
>>>
>>> Thanks!
>>>
>>> On Mon, Dec 3, 2018 at 4:54 PM Sebastien Jourdain <
>>> sebastien.jourdain at kitware.com> wrote:
>>>
>>>> The event handling needs to happen on the client side (JS) which should
>>>> then trigger a RPC call to the server to adjust the resolution of the
>>>> server data. I don't think we register any key listener in the browser
>>>> that's why they don't get forwarded to the server.
>>>>
>>>> On Mon, Dec 3, 2018 at 8:47 AM ivan rodriguez <
>>>> ivandiegorodriguez at gmail.com> wrote:
>>>>
>>>>> Hello,
>>>>>
>>>>> I'm using the module vtkWeb for Remote Rendering, following this
>>>>> simple python example:
>>>>>
>>>>> *https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py
>>>>> <https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py>*
>>>>>
>>>>> and I have modified it in order to include a keyPress event. The code
>>>>> works but the
>>>>> key event is not working . Please find my code below (the only
>>>>> modification from the link is the class MyInteractorStyle ).
>>>>>
>>>>> I'll really appreciate any help with this!
>>>>>
>>>>> Thanks !!
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> ##########################################################################
>>>>>
>>>>> ##########################################################################
>>>>>
>>>>> # import to process args
>>>>> import sys
>>>>> import os
>>>>>
>>>>> # import vtk modules.
>>>>> import vtk
>>>>> from vtk.web import protocols
>>>>> from vtk.web import wslink as vtk_wslink
>>>>> from wslink import server
>>>>>
>>>>> try:
>>>>>     import argparse
>>>>> except ImportError:
>>>>>     # since  Python 2.6 and earlier don't have argparse, we simply
>>>>> provide
>>>>>     # the source for the same as _argparse and we use it instead.
>>>>>     from vtk.util import _argparse as argparse
>>>>>
>>>>> #
>>>>> =============================================================================
>>>>> # Create custom ServerProtocol class to handle clients requests
>>>>> #
>>>>> =============================================================================
>>>>>
>>>>>
>>>>> class MyInteractorStyle(vtk.vtkInteractorStyleTrackballCamera):
>>>>>
>>>>>     def __init__(self,renderer, cone):
>>>>>         self.parent = renderer.GetInteractor()
>>>>> self.resolution=5
>>>>> self.cone = cone
>>>>>
>>>>>         self.AddObserver("KeyPressEvent",self.keyPressEvent)
>>>>>
>>>>>     def keyPressEvent(self,obj,event):
>>>>>         key = self.parent.GetKeySym()
>>>>>         if key == 'l':
>>>>>     print(key)
>>>>>     self.cone.SetResolution(self.resolution)
>>>>>     self.resolution+=1
>>>>>         return
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> class _WebCone(vtk_wslink.ServerProtocol):
>>>>>
>>>>>     # Application configuration
>>>>>     view    = None
>>>>>     authKey = "wslink-secret"
>>>>>
>>>>>     def initialize(self):
>>>>>         global renderer, renderWindow, renderWindowInteractor, cone,
>>>>> mapper, actor
>>>>>
>>>>>         # Bring used components
>>>>>         self.registerVtkWebProtocol(protocols.vtkWebMouseHandler())
>>>>>         self.registerVtkWebProtocol(protocols.vtkWebViewPort())
>>>>>
>>>>> self.registerVtkWebProtocol(protocols.vtkWebViewPortImageDelivery())
>>>>>
>>>>> self.registerVtkWebProtocol(protocols.vtkWebViewPortGeometryDelivery())
>>>>>
>>>>>         # Update authentication key to use
>>>>>         self.updateSecret(_WebCone.authKey)
>>>>>
>>>>>         # Create default pipeline (Only once for all the session)
>>>>>         if not _WebCone.view:
>>>>>             # VTK specific code
>>>>>             renderer = vtk.vtkRenderer()
>>>>>             renderWindow = vtk.vtkRenderWindow()
>>>>>             renderWindow.AddRenderer(renderer)
>>>>>
>>>>>             renderWindowInteractor = vtk.vtkRenderWindowInteractor()
>>>>>             renderWindowInteractor.SetRenderWindow(renderWindow)
>>>>>
>>>>>
>>>>>
>>>>>             cone = vtk.vtkConeSource()
>>>>>             mapper = vtk.vtkPolyDataMapper()
>>>>>             actor = vtk.vtkActor()
>>>>>
>>>>>             mapper.SetInputConnection(cone.GetOutputPort())
>>>>>             actor.SetMapper(mapper)
>>>>>
>>>>>
>>>>> renderWindowInteractor.SetInteractorStyle(MyInteractorStyle(renderWindow,
>>>>> cone))
>>>>>
>>>>>             renderer.AddActor(actor)
>>>>>             renderer.ResetCamera()
>>>>>             renderWindow.Render()
>>>>>
>>>>>             # VTK Web application specific
>>>>>             _WebCone.view = renderWindow
>>>>>
>>>>> self.getApplication().GetObjectIdMap().SetActiveObject("VIEW", renderWindow)
>>>>>
>>>>>   #  renderWindowInteractor.Start()
>>>>>
>>>>> #
>>>>> =============================================================================
>>>>> # Main: Parse args and start server
>>>>> #
>>>>> =============================================================================
>>>>>
>>>>> if __name__ == "__main__":
>>>>>     # Create argument parser
>>>>>     parser = argparse.ArgumentParser(description="VTK/Web Cone
>>>>> web-application")
>>>>>
>>>>>     # Add default arguments
>>>>>     server.add_arguments(parser)
>>>>>
>>>>>     # Extract arguments
>>>>>     args = parser.parse_args()
>>>>>
>>>>>     # Configure our current application
>>>>>     _WebCone.authKey = args.authKey
>>>>>
>>>>>     # Start server
>>>>>     server.start_webserver(options=args, protocol=_WebCone)
>>>>>
>>>>> _______________________________________________
>>>>> Powered by www.kitware.com
>>>>>
>>>>> Visit other Kitware open-source projects at
>>>>> http://www.kitware.com/opensource/opensource.html
>>>>>
>>>>> Please keep messages on-topic and check the VTK FAQ at:
>>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>>
>>>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>>>
>>>>> Follow this link to subscribe/unsubscribe:
>>>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>>>
>>>>
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From david.gobbi at gmail.com  Mon Dec  3 11:34:33 2018
From: david.gobbi at gmail.com (David Gobbi)
Date: Mon, 3 Dec 2018 09:34:33 -0700
Subject: [vtkusers] vtkProgressBar attached to an actor
In-Reply-To: <CAEf70bxGKBKwiRW8viniAV2iLHC71HDhfcDVhqfuXDXpVGeu0w@mail.gmail.com>
References: <CAEf70bxGKBKwiRW8viniAV2iLHC71HDhfcDVhqfuXDXpVGeu0w@mail.gmail.com>
Message-ID: <CANwS1=GTqSb6aqkmrFufi4A-xdeKqyvt6WHKw_rZvzhpwAR=6Q@mail.gmail.com>

Hi Andrea,

A generic way of doing this is to write a callback for vtkRenderer's
StartEvent.  Then every time the renderer is preparing to render the scene,
it will call your callback, and your callback can set the position of the
2D actors.  The vtkCoordinate class provides a convenient way of converting
from 3D to 2D coordinates.

Other than callbacks, I don't think there's any way to do it.  The VTK
label actors can be used to automatically position text at 3D locations,
but there don't seem to be any classes for placing an arbitrary 2D actor at
a 3D location.

  David

On Mon, Dec 3, 2018 at 9:09 AM Andrea Gavana <andrea.gavana at gmail.com>
wrote:

> Hello everyone,
>
>     I?ve been googling around without much success until now, so I am
> turning to this kind mailing list for suggestions.
>
> I have a 3D scene with multiple unstructured grids and some STL actors at
> defined positions (in 3D). I would like to be able to ?attach? a progress
> bar to each of these STL actors - as my scene in rendered in a time
> dependent way, with the user able to go back and forth in time, it would
> make a nice touch for what I?m showing.
>
> Now, it seems to me vtkProgressBarWidget is a 2D animal, so I?m unclear
> how I can place it below the STL actor and anche it there even if the user
> zooms/pans the 3D window.
>
> Maybe what I?m trying to accomplish is simply not possible, but I?m open
> to all suggestions you may have.
>
> Thank you in advance.
>
> Andrea.
>
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From ivandiegorodriguez at gmail.com  Mon Dec  3 11:35:34 2018
From: ivandiegorodriguez at gmail.com (ivan rodriguez)
Date: Mon, 3 Dec 2018 17:35:34 +0100
Subject: [vtkusers] key press event in vtkWeb
In-Reply-To: <CABObKxeE=7LHS5tNVUeV3N6J+ygRy+uL2ACH5BTiO8r3pGyfDQ@mail.gmail.com>
References: <CAOJ-3OR4Y3AFfG2C0wJ91opEGW1JE_0p_ekCoZJTgiUAsecWUg@mail.gmail.com>
 <CABObKxczcdWRPySL9HvYMRLY1WdL8bQ=YE8rrQdzcpMd36zq0w@mail.gmail.com>
 <CAOJ-3OR+RpGGQmL2a-D330cqtcL7f6BSoavr0f-4ZeqarJMaUA@mail.gmail.com>
 <CABObKxeQuER5Sw6tHg6JNWN_7BXJVikY6W7vh4GOLUPFBYohog@mail.gmail.com>
 <CAOJ-3OSrLfjTZOfQk1-98a+M_2BRAjyEN1-AM==ke8QXOXzEiA@mail.gmail.com>
 <CABObKxeE=7LHS5tNVUeV3N6J+ygRy+uL2ACH5BTiO8r3pGyfDQ@mail.gmail.com>
Message-ID: <CAOJ-3OQcb_UvumiowojMJCZ9o96x0wqUbiD=FQxUvCaTjeV5dA@mail.gmail.com>

Thanks a lot!

On Mon, Dec 3, 2018 at 5:33 PM Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> Below is an example, but Google should be able to help you also on the JS
> side...
>
> https://github.com/Kitware/vtk-js/blob/master/Sources/Rendering/Core/RenderWindowInteractor/index.js#L214-L222
>
> Then for the RPC part you can find some inspiration there even if it is on
> ParaView
> https://github.com/Kitware/paraviewweb-examples
>
> Just FYI, if that make sense for what you are trying to do, we have
> support contract that could speed up the process on your end.
>
> HTH,
>
> Seb
>
> On Mon, Dec 3, 2018 at 9:22 AM ivan rodriguez <
> ivandiegorodriguez at gmail.com> wrote:
>
>> Thanks for the explanation! I don't really know how to add a listener on
>> the client side so I'll really appreciate any help with that.  Do you have
>> some example or do you know if there are some examples online about that?
>>
>>
>>
>>
>>
>>
>>
>> On Mon, Dec 3, 2018 at 5:12 PM Sebastien Jourdain <
>> sebastien.jourdain at kitware.com> wrote:
>>
>>> I'm not saying it is not the way to go. You just need to add a listener
>>> on the client side for the keyPress and forward that to the server.
>>> That's it. Nothing more than that.
>>>
>>> On Mon, Dec 3, 2018 at 9:06 AM ivan rodriguez <
>>> ivandiegorodriguez at gmail.com> wrote:
>>>
>>>> Thanks for the quick response!
>>>>
>>>> I have an application written in VTK doing an animation through a
>>>> timerCallback and using key events and I wanted to have a similar version
>>>> for the browser.
>>>> So if vtkWeb is not the right way to go, do you know if vtk.js could be
>>>> a good option for that?
>>>>
>>>> Thanks!
>>>>
>>>> On Mon, Dec 3, 2018 at 4:54 PM Sebastien Jourdain <
>>>> sebastien.jourdain at kitware.com> wrote:
>>>>
>>>>> The event handling needs to happen on the client side (JS) which
>>>>> should then trigger a RPC call to the server to adjust the resolution of
>>>>> the server data. I don't think we register any key listener in the browser
>>>>> that's why they don't get forwarded to the server.
>>>>>
>>>>> On Mon, Dec 3, 2018 at 8:47 AM ivan rodriguez <
>>>>> ivandiegorodriguez at gmail.com> wrote:
>>>>>
>>>>>> Hello,
>>>>>>
>>>>>> I'm using the module vtkWeb for Remote Rendering, following this
>>>>>> simple python example:
>>>>>>
>>>>>> *https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py
>>>>>> <https://github.com/dmreagan/vtk-remote-render/blob/master/server/vtk_server.py>*
>>>>>>
>>>>>> and I have modified it in order to include a keyPress event. The code
>>>>>> works but the
>>>>>> key event is not working . Please find my code below (the only
>>>>>> modification from the link is the class MyInteractorStyle ).
>>>>>>
>>>>>> I'll really appreciate any help with this!
>>>>>>
>>>>>> Thanks !!
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> ##########################################################################
>>>>>>
>>>>>> ##########################################################################
>>>>>>
>>>>>> # import to process args
>>>>>> import sys
>>>>>> import os
>>>>>>
>>>>>> # import vtk modules.
>>>>>> import vtk
>>>>>> from vtk.web import protocols
>>>>>> from vtk.web import wslink as vtk_wslink
>>>>>> from wslink import server
>>>>>>
>>>>>> try:
>>>>>>     import argparse
>>>>>> except ImportError:
>>>>>>     # since  Python 2.6 and earlier don't have argparse, we simply
>>>>>> provide
>>>>>>     # the source for the same as _argparse and we use it instead.
>>>>>>     from vtk.util import _argparse as argparse
>>>>>>
>>>>>> #
>>>>>> =============================================================================
>>>>>> # Create custom ServerProtocol class to handle clients requests
>>>>>> #
>>>>>> =============================================================================
>>>>>>
>>>>>>
>>>>>> class MyInteractorStyle(vtk.vtkInteractorStyleTrackballCamera):
>>>>>>
>>>>>>     def __init__(self,renderer, cone):
>>>>>>         self.parent = renderer.GetInteractor()
>>>>>> self.resolution=5
>>>>>> self.cone = cone
>>>>>>
>>>>>>         self.AddObserver("KeyPressEvent",self.keyPressEvent)
>>>>>>
>>>>>>     def keyPressEvent(self,obj,event):
>>>>>>         key = self.parent.GetKeySym()
>>>>>>         if key == 'l':
>>>>>>     print(key)
>>>>>>     self.cone.SetResolution(self.resolution)
>>>>>>     self.resolution+=1
>>>>>>         return
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> class _WebCone(vtk_wslink.ServerProtocol):
>>>>>>
>>>>>>     # Application configuration
>>>>>>     view    = None
>>>>>>     authKey = "wslink-secret"
>>>>>>
>>>>>>     def initialize(self):
>>>>>>         global renderer, renderWindow, renderWindowInteractor, cone,
>>>>>> mapper, actor
>>>>>>
>>>>>>         # Bring used components
>>>>>>         self.registerVtkWebProtocol(protocols.vtkWebMouseHandler())
>>>>>>         self.registerVtkWebProtocol(protocols.vtkWebViewPort())
>>>>>>
>>>>>> self.registerVtkWebProtocol(protocols.vtkWebViewPortImageDelivery())
>>>>>>
>>>>>> self.registerVtkWebProtocol(protocols.vtkWebViewPortGeometryDelivery())
>>>>>>
>>>>>>         # Update authentication key to use
>>>>>>         self.updateSecret(_WebCone.authKey)
>>>>>>
>>>>>>         # Create default pipeline (Only once for all the session)
>>>>>>         if not _WebCone.view:
>>>>>>             # VTK specific code
>>>>>>             renderer = vtk.vtkRenderer()
>>>>>>             renderWindow = vtk.vtkRenderWindow()
>>>>>>             renderWindow.AddRenderer(renderer)
>>>>>>
>>>>>>             renderWindowInteractor = vtk.vtkRenderWindowInteractor()
>>>>>>             renderWindowInteractor.SetRenderWindow(renderWindow)
>>>>>>
>>>>>>
>>>>>>
>>>>>>             cone = vtk.vtkConeSource()
>>>>>>             mapper = vtk.vtkPolyDataMapper()
>>>>>>             actor = vtk.vtkActor()
>>>>>>
>>>>>>             mapper.SetInputConnection(cone.GetOutputPort())
>>>>>>             actor.SetMapper(mapper)
>>>>>>
>>>>>>
>>>>>> renderWindowInteractor.SetInteractorStyle(MyInteractorStyle(renderWindow,
>>>>>> cone))
>>>>>>
>>>>>>             renderer.AddActor(actor)
>>>>>>             renderer.ResetCamera()
>>>>>>             renderWindow.Render()
>>>>>>
>>>>>>             # VTK Web application specific
>>>>>>             _WebCone.view = renderWindow
>>>>>>
>>>>>> self.getApplication().GetObjectIdMap().SetActiveObject("VIEW", renderWindow)
>>>>>>
>>>>>>   #  renderWindowInteractor.Start()
>>>>>>
>>>>>> #
>>>>>> =============================================================================
>>>>>> # Main: Parse args and start server
>>>>>> #
>>>>>> =============================================================================
>>>>>>
>>>>>> if __name__ == "__main__":
>>>>>>     # Create argument parser
>>>>>>     parser = argparse.ArgumentParser(description="VTK/Web Cone
>>>>>> web-application")
>>>>>>
>>>>>>     # Add default arguments
>>>>>>     server.add_arguments(parser)
>>>>>>
>>>>>>     # Extract arguments
>>>>>>     args = parser.parse_args()
>>>>>>
>>>>>>     # Configure our current application
>>>>>>     _WebCone.authKey = args.authKey
>>>>>>
>>>>>>     # Start server
>>>>>>     server.start_webserver(options=args, protocol=_WebCone)
>>>>>>
>>>>>> _______________________________________________
>>>>>> Powered by www.kitware.com
>>>>>>
>>>>>> Visit other Kitware open-source projects at
>>>>>> http://www.kitware.com/opensource/opensource.html
>>>>>>
>>>>>> Please keep messages on-topic and check the VTK FAQ at:
>>>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>>>
>>>>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>>>>
>>>>>> Follow this link to subscribe/unsubscribe:
>>>>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>>>>
>>>>>
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From meakcey at gmail.com  Mon Dec  3 16:02:44 2018
From: meakcey at gmail.com (meakcey)
Date: Mon, 3 Dec 2018 14:02:44 -0700 (MST)
Subject: [vtkusers] Crashing on GetGlobalIds
In-Reply-To: <CANjZAi8T3Za4Cx-CrkSkYYWh6LeKoXHP3aqzQEo=j3iKRSFv6w@mail.gmail.com>
References: <1543069040005-0.post@n5.nabble.com>
 <1543070864626-0.post@n5.nabble.com>
 <CANjZAi8T3Za4Cx-CrkSkYYWh6LeKoXHP3aqzQEo=j3iKRSFv6w@mail.gmail.com>
Message-ID: <1543870964413-0.post@n5.nabble.com>

Thank you for your suggestion
assert(globalIds); line is not crashing. That means as you pointed out,
visible filter should be throwing out the globalids.
Could you guide me through the source of filters?




--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From rastor.ragereaver at gmail.com  Mon Dec  3 16:14:27 2018
From: rastor.ragereaver at gmail.com (=?UTF-8?Q?Rados=C5=82aw_Furmaniak?=)
Date: Mon, 3 Dec 2018 22:14:27 +0100
Subject: [vtkusers] Color PolyData based on VolumeData
In-Reply-To: <YQBPR0101MB1859FEE8601440A0F60A73F5D8AE0@YQBPR0101MB1859.CANPRD01.PROD.OUTLOOK.COM>
References: <CAKO8d6O1SNov0HV6BzjY=VX1b3ghYNrq88jO_tChgS87=vFXOQ@mail.gmail.com>
 <1543811202678-0.post@n5.nabble.com>
 <YQBPR0101MB1859FEE8601440A0F60A73F5D8AE0@YQBPR0101MB1859.CANPRD01.PROD.OUTLOOK.COM>
Message-ID: <CAKO8d6Pz7TTXaU+9FG6m4pFKarG13TnbXP04htpPbf8LcaFV-g@mail.gmail.com>

Thanks a lot!
The solution from Andaharoo was what I was looking for.

pon., 3 gru 2018 o 07:50 Andras Lasso <lasso at queensu.ca> napisa?(a):

> You can copy voxel values from a volume to a polydata using vtkProbeFilter.
>
> However, this won't help you if you obtained your polydata using a
> vtkContourFilter, because the contour filter generates isosurface, which
> means all extracted points have the same intensity value in the input
> volume. No matter what transfer function you apply, you'll always end up
> with a solid colored surface.
>
> It is a common desire to replace volume rendering by displaying a colored
> surface, but this is not feasible (
> https://discourse.slicer.org/t/save-volume-rendering-as-stl-file/524/20).
>
> If your goal is 3D printing then you may use voxel printing technique,
> which allows printing directly from volume rendering, without segmenting
> any surfaces (
> https://discourse.slicer.org/t/printing-volume-renderings-in-plastic/3017
> ).
>
> If your goal is volume-rendering-like display (for example, you want to
> show "volume rendering" in Unity) then you need to use an actual volume
> renderer.
>
> Andras
>
>
> -----Original Message-----
> From: vtkusers <vtkusers-bounces at public.kitware.com> On Behalf Of
> Andaharoo
> Sent: Sunday, December 2, 2018 11:27 PM
> To: vtkusers at vtk.org
> Subject: Re: [vtkusers] Color PolyData based on VolumeData
>
> So, if I understand right, you want to color the scalar/whatever field
> onto the poly? Just provide vtkPolyData with scalars and set the polyData's
> mapper scalar visibility to on.
>
> If you give it 1 component scalars you can give the mapper a color
> function to map them. If you give it 3 component uchar it should just
> display them as color (as long as scalar visibility is on). Like so:
>
>
> // Create the scalars array
> vtkDoubleArray* scalars = vtkDoubleArray::New();
> scalars->SetName("Scalars");
> // For every point in the poly
> for (vtkIdType i = 0; i < outputPoly->GetNumberOfPoints(); i++) {
>         double pt[3];
>         outputPoly->GetPoint(i, pt);
>
>         scalars->InsertTuple1(i, trilinearSamplePoint(inputImage, pt[0],
> pt[1], pt[2], 1, 0)); } // Add the scalar data to the poly data
> outputPoly->GetPointData()->AddArray(scalars);
> outputPoly->GetPointData()->SetActiveScalars("Scalars");
>
>
> This just goes through all the points in the polygon and gets the color
> from the image. Getting the color at a point in an image can be done by
> simply using the nearest color from the image (nearest neighbor) or better
> would be to use trilinear interpolation of the 8 nearest colors which I
> used in my example. Also note my code expects float image input:
> static const int calcIndex(int x, int y, int z, int width, int height) {
> return x + width * (y + height * z); }
>
> static float trilinearSamplePoint(vtkImageData* imageData, float x, float
> y, float z, int numComps, int comp) {
>         float* imagePtr =
> static_cast<float*>(imageData->GetScalarPointer());
>         double* spacing = imageData->GetSpacing();
>         double* origin = imageData->GetOrigin();
>         int* dim = imageData->GetDimensions();
>
>         // We assume point x, y, z is in the image
>         int xi = (x - origin[0]) / spacing[0];
>         int yi = (y - origin[1]) / spacing[1];
>         int zi = (z - origin[2]) / spacing[2];
>
>         // Get the intensities at the 8 nearest neighbors
>         float i000 = imagePtr[calcIndex(xi, yi, zi, dim[0], dim[1]) *
> numComps + comp];
>         float i100 = imagePtr[calcIndex(xi + 1, yi, zi, dim[0], dim[1]) *
> numComps
> + comp];
>         float i110 = imagePtr[calcIndex(xi + 1, yi + 1, zi, dim[0], dim[1]
> * numComps + comp)];
>         float i010 = imagePtr[calcIndex(xi, yi + 1, zi, dim[0], dim[1]) *
> numComps
> + comp];
>
>         float i001 = imagePtr[calcIndex(xi, yi, zi + 1, dim[0], dim[1]) *
> numComps
> + comp];
>         float i101 = imagePtr[calcIndex(xi + 1, yi, zi + 1, dim[0],
> dim[1]) * numComps + comp];
>         float i111 = imagePtr[calcIndex(xi + 1, yi + 1, zi + 1, dim[0],
> dim[1]) * numComps + comp];
>         float i011 = imagePtr[calcIndex(xi, yi + 1, zi + 1, dim[0],
> dim[1]) * numComps + comp];
>
>         // Get the fractional/unit distance from nearest neighbor 000
>         float rx = xi * spacing[0] + origin[0]; // Position of node
>         rx = (x - rx) / spacing[0]; // (Node - actual point position) /
> voxel width
>         float ry = yi * spacing[1] + origin[1];
>         ry = (y - ry) / spacing[1];
>         float rz = zi * spacing[2] + origin[2];
>         rz = (z - rz) / spacing[2];
>
>         // Now we do the trilinear interpolation
>         float ax = i000 + (i100 - i000) * rx;
>         float bx = i010 + (i110 - i010) * rx;
>         float cy = ax + (bx - ax) * ry;
>
>         float dx = i001 + (i101 - i001) * rx;
>         float ex = i011 + (i111 - i011) * rx;
>         float fy = dx + (ex - dx) * ry;
>
>         float gz = cy + (fy - cy) * rz;
>         return gz;
> }
>
>
>
>
> --
> Sent from:
> https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fvtk.1045678.n5.nabble.com%2FVTK-Users-f1224199.html&amp;data=02%7C01%7Classo%40queensu.ca%7C34224811bdf846b9c4a808d658d7898f%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636794080091371821&amp;sdata=iziee8ltwEAWna3RvM3dma7A3p94NWMHCfIwclRpR0I%3D&amp;reserved=0
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>
> Please keep messages on-topic and check the VTK FAQ at:
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>
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> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
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>
> Please keep messages on-topic and check the VTK FAQ at:
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From bill.lorensen at gmail.com  Mon Dec  3 21:20:31 2018
From: bill.lorensen at gmail.com (Bill Lorensen)
Date: Mon, 3 Dec 2018 18:20:31 -0800
Subject: [vtkusers] Help with vtkInterpolateDataSetAttributes
In-Reply-To: <F948DFBF-F7DD-488E-ADE4-3C3326A834C3@inl.gov>
References: <F948DFBF-F7DD-488E-ADE4-3C3326A834C3@inl.gov>
Message-ID: <CADZJ4hMhJs=sH2FVhq=djKJ-6awNMETkLbxyuyAxyrjUhwGVvw@mail.gmail.com>

I suspect that vtkInterpolateDataSetAttributes may be buggy. The are no
tests that interpolate scalar data. I'm looking into it.

On Thu, Nov 29, 2018, 8:13 AM Andrew E. Slaughter via vtkusers <
vtkusers at public.kitware.com wrote:

> I am attempting to interpolate between two ExodusII (vtkExodusIIReader)
> results using the vtkInterpolateDataSetAttributes, but am having trouble
> getting it to work. I was able to perform an interpolation that mimics the
> behavior with calls to vtkAbstractArray::InterpolateTuple, but this doesn?t
> seem like the correct solution.
>
>
>
> I have attached a script that show what I am trying to do, including what
> is working and what is not. I know that for this problem I could use
> vtkTemporalInterpolator, but for the actual problem I am trying to solve it
> isn?t appropriate. I am using python bindings with VTK7.1 on MacOS.
>
>
>
> I would appreciate any help I can get making this work.
>
>
>
> Thanks,
>
> Andrew
>
>
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From trlsmax at gmail.com  Mon Dec  3 22:35:13 2018
From: trlsmax at gmail.com (Max Chen)
Date: Mon, 3 Dec 2018 20:35:13 -0700 (MST)
Subject: [vtkusers] how to render VTK into user provided FBO
Message-ID: <1543894513711-0.post@n5.nabble.com>

Hi all,

I want VTK render into a FBO I created and use the texture attached to this
FBO to render into a glfw window.

I tried this :
create a class from vtkExternalOpenGLRenderWindow so I can modify the
protected member.

class MyRW : public vtkExternalOpenGLRenderWindow
{
public:
	void SetFBO(unsigned int fbo, unsigned int tex, unsigned int w, unsigned
int h);
};

void MyRW::SetFBO(unsigned int fbo, unsigned int tex, unsigned int w,
unsigned int h)
{

	this->SetBackLeftBuffer(GL_COLOR_ATTACHMENT0);
	this->SetFrontLeftBuffer(GL_COLOR_ATTACHMENT0);
	this->SetBackBuffer(GL_COLOR_ATTACHMENT0);
	this->SetFrontBuffer(GL_COLOR_ATTACHMENT0);

	this->Size[0] = w;
	this->Size[1] = h;
	this->NumberOfFrameBuffers = 1;
	this->DepthRenderBufferObject = 0;
	this->FrameBufferObject = static_cast<unsigned int>(fbo);
	this->TextureObjects[0] = static_cast<unsigned int>(tex);
	this->OffScreenRendering = 1;
	this->OffScreenUseFrameBuffer = 1;
	this->Modified();
}

I also pass the glfw window pointer to vtkCommand::WindowMakeCurrentEvent.

In the glfw loop :

	// render into FBO
	glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
        myvtk->render();
	glBindFramebuffer(GL_FRAMEBUFFER, 0);

	// use the texture
	glEnable(GL_TEXTURE_2D);
	glBindTexture(GL_TEXTURE_2D, m_tex);
	unsigned int e = glGetError();
	glColor4f(1, 1, 1, 1);
	glBegin(GL_QUADS);
	glTexCoord2f(0.0, 0.0); glVertex3f(-1.0, -1.0, 0);
	glTexCoord2f(1.0, 0.0); glVertex3f(1.0, -1.0, 0);
	glTexCoord2f(1.0, 1.0); glVertex3f(1.0, 1.0, 0);
	glTexCoord2f(0.0, 1.0); glVertex3f(-1.0, 1.0, 0);
	glEnd();
	glBindTexture(GL_TEXTURE_2D, 0);
	glDisable(GL_TEXTURE_2D);

        // draw imgui 
        ImGui_ImplOpenGL2_RenderDrawData(ImGui::GetDrawData());

but it did not work, window is flickering and imgui just disappear.

I setup a cmake test project in github, please help.
https://github.com/trlsmax/imgui-vtk <https://github.com/trlsmax/imgui-vtk>  



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From andrea.gavana at gmail.com  Mon Dec  3 23:57:59 2018
From: andrea.gavana at gmail.com (Andrea Gavana)
Date: Tue, 4 Dec 2018 05:57:59 +0100
Subject: [vtkusers] vtkProgressBar attached to an actor
In-Reply-To: <CANwS1=GTqSb6aqkmrFufi4A-xdeKqyvt6WHKw_rZvzhpwAR=6Q@mail.gmail.com>
References: <CAEf70bxGKBKwiRW8viniAV2iLHC71HDhfcDVhqfuXDXpVGeu0w@mail.gmail.com>
 <CANwS1=GTqSb6aqkmrFufi4A-xdeKqyvt6WHKw_rZvzhpwAR=6Q@mail.gmail.com>
Message-ID: <CAEf70bwQMaYF-GYibs4gf59h+e-s=iTnmAGSVcPFd1jVjQ+dyg@mail.gmail.com>

Hi David,

On Mon, 3 Dec 2018 at 17.34, David Gobbi <david.gobbi at gmail.com> wrote:

> Hi Andrea,
>
> A generic way of doing this is to write a callback for vtkRenderer's
> StartEvent.  Then every time the renderer is preparing to render the scene,
> it will call your callback, and your callback can set the position of the
> 2D actors.  The vtkCoordinate class provides a convenient way of converting
> from 3D to 2D coordinates.
>
> Other than callbacks, I don't think there's any way to do it.  The VTK
> label actors can be used to automatically position text at 3D locations,
> but there don't seem to be any classes for placing an arbitrary 2D actor at
> a 3D location.
>


Thank you for your answer. I?ll give it a go and see if I can make it work.

Andrea.


>
>   David
>
> On Mon, Dec 3, 2018 at 9:09 AM Andrea Gavana <andrea.gavana at gmail.com>
> wrote:
>
>> Hello everyone,
>>
>>     I?ve been googling around without much success until now, so I am
>> turning to this kind mailing list for suggestions.
>>
>> I have a 3D scene with multiple unstructured grids and some STL actors at
>> defined positions (in 3D). I would like to be able to ?attach? a progress
>> bar to each of these STL actors - as my scene in rendered in a time
>> dependent way, with the user able to go back and forth in time, it would
>> make a nice touch for what I?m showing.
>>
>> Now, it seems to me vtkProgressBarWidget is a 2D animal, so I?m unclear
>> how I can place it below the STL actor and anche it there even if the user
>> zooms/pans the 3D window.
>>
>> Maybe what I?m trying to accomplish is simply not possible, but I?m open
>> to all suggestions you may have.
>>
>> Thank you in advance.
>>
>> Andrea.
>>
>
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From newcfd at yahoo.com  Tue Dec  4 04:13:19 2018
From: newcfd at yahoo.com (newcfd)
Date: Tue, 4 Dec 2018 02:13:19 -0700 (MST)
Subject: [vtkusers] isosurface update issue
In-Reply-To: <CANjZAi-=if6-r8-P1XMFnZfsf58jahs60yN1K0zsX9qJqDy-7A@mail.gmail.com>
References: <1543554725951-0.post@n5.nabble.com>
 <CANjZAi_3UKRKN+37zg45Xm73W1vqmuRTEiKHAuVuoisFrhO8Rg@mail.gmail.com>
 <1543674451900-0.post@n5.nabble.com>
 <CANjZAi-=if6-r8-P1XMFnZfsf58jahs60yN1K0zsX9qJqDy-7A@mail.gmail.com>
Message-ID: <1543914799956-0.post@n5.nabble.com>

I did it in the way you recommended, David. The old ones are still there.
rederWindow->Render() and QVTKOpenGLWidget->update() are added
as well. No help. VTK version 8.1.

void MyApp::redraw( const double value )
{
    if ( m_pActor != nullptr )
    {
          renderer->RemoveActor(m_pActor );
          m_pActor->Delete();
          m_pActor = nullptr;
    }

    m_pActor = vtkActor::New();
    vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetScalarRange(0.0, 1.0);
    m_pActor->SetMapper( mapper );

   renderer->AddActor( m_pActor );
   renderer->SetBackground(1,1,1); // Background color white

   vtkStructuredGrid * mesh =...

  vtkSmartPointer<vtkContourFilter> filter =
  vtkSmartPointer<vtkContourFilter>::New();
  filter->SetInputData( mesh );
  filter->SetNumberOfContours( 1 );
  filter->Setvalue( 0, value ); // value is passed in

  m_pActor->GetMapper()->SetInputConnection( filter->GetOutputPort() );
  renderer->Render();
} 



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From ken.martin at kitware.com  Tue Dec  4 07:56:56 2018
From: ken.martin at kitware.com (Ken Martin)
Date: Tue, 4 Dec 2018 07:56:56 -0500
Subject: [vtkusers] how to render VTK into user provided FBO
In-Reply-To: <1543894513711-0.post@n5.nabble.com>
References: <1543894513711-0.post@n5.nabble.com>
Message-ID: <CANXz0Sb83L3bd1OtG1e8cORY_uvdT8KHXeHsdiwr69vrf-pVtg@mail.gmail.com>

Try binding your FBO and context and then use
InitializeFromCurrentContext.  That has some logic to record the current
FBO and use it for subsequent operations.  That might do what you want.

- Ken

On Mon, Dec 3, 2018 at 10:35 PM Max Chen <trlsmax at gmail.com> wrote:

> Hi all,
>
> I want VTK render into a FBO I created and use the texture attached to this
> FBO to render into a glfw window.
>
> I tried this :
> create a class from vtkExternalOpenGLRenderWindow so I can modify the
> protected member.
>
> class MyRW : public vtkExternalOpenGLRenderWindow
> {
> public:
>         void SetFBO(unsigned int fbo, unsigned int tex, unsigned int w,
> unsigned
> int h);
> };
>
> void MyRW::SetFBO(unsigned int fbo, unsigned int tex, unsigned int w,
> unsigned int h)
> {
>
>         this->SetBackLeftBuffer(GL_COLOR_ATTACHMENT0);
>         this->SetFrontLeftBuffer(GL_COLOR_ATTACHMENT0);
>         this->SetBackBuffer(GL_COLOR_ATTACHMENT0);
>         this->SetFrontBuffer(GL_COLOR_ATTACHMENT0);
>
>         this->Size[0] = w;
>         this->Size[1] = h;
>         this->NumberOfFrameBuffers = 1;
>         this->DepthRenderBufferObject = 0;
>         this->FrameBufferObject = static_cast<unsigned int>(fbo);
>         this->TextureObjects[0] = static_cast<unsigned int>(tex);
>         this->OffScreenRendering = 1;
>         this->OffScreenUseFrameBuffer = 1;
>         this->Modified();
> }
>
> I also pass the glfw window pointer to vtkCommand::WindowMakeCurrentEvent.
>
> In the glfw loop :
>
>         // render into FBO
>         glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
>         myvtk->render();
>         glBindFramebuffer(GL_FRAMEBUFFER, 0);
>
>         // use the texture
>         glEnable(GL_TEXTURE_2D);
>         glBindTexture(GL_TEXTURE_2D, m_tex);
>         unsigned int e = glGetError();
>         glColor4f(1, 1, 1, 1);
>         glBegin(GL_QUADS);
>         glTexCoord2f(0.0, 0.0); glVertex3f(-1.0, -1.0, 0);
>         glTexCoord2f(1.0, 0.0); glVertex3f(1.0, -1.0, 0);
>         glTexCoord2f(1.0, 1.0); glVertex3f(1.0, 1.0, 0);
>         glTexCoord2f(0.0, 1.0); glVertex3f(-1.0, 1.0, 0);
>         glEnd();
>         glBindTexture(GL_TEXTURE_2D, 0);
>         glDisable(GL_TEXTURE_2D);
>
>         // draw imgui
>         ImGui_ImplOpenGL2_RenderDrawData(ImGui::GetDrawData());
>
> but it did not work, window is flickering and imgui just disappear.
>
> I setup a cmake test project in github, please help.
> https://github.com/trlsmax/imgui-vtk <https://github.com/trlsmax/imgui-vtk>
>
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
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>
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27510 USA

This communication, including all attachments, contains confidential and
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From kor1581 at gmail.com  Tue Dec  4 09:27:59 2018
From: kor1581 at gmail.com (ran)
Date: Tue, 4 Dec 2018 07:27:59 -0700 (MST)
Subject: [vtkusers] Occurring vtkDebugLeaks even smartpointers are used
Message-ID: <1543933679005-0.post@n5.nabble.com>

I'm using vtk 8.1.0 for displaying DICOM images in three windows in Qt widget
application in windows 10. 
For this mainly uses uses three instances vtkResliceImageViewer,
vtkGenericOpenGLRenderWindow, vtkDICOMReader, vtkDICOMMetaData,
vtkInteractorStyleImage
also uses QVTKOpenGLWidget for fitting the images in Qt window. 
I'm using smart pointers for all the objects, for vtk uses vtkSmartPointer,
Qt uses QPointer.
While the application window closes occurring a long list of vtkDebugLeaks. 
Also, the application crashes while opening the second time.
Is these vtkDebugLeaks affect the application working? or can ignore
The list shows a long list which also includes classes not using and can't
find main classes of causing the leaks.
Even though uses smart pointers, why these leaks happen.

Below shows the list of leaks, 

/vtkDebugLeaks has detected LEAKS!
Class "vtkOpenGLRenderTimerLog" has 3 instances still around.
Class "vtkOpenGLTextActor" has 6 instances still around.
Class "vtkSynchronizedTemplatesCutter3D" has 3 instances still around.
Class "vtk3DWidgetConnection" has 3 instances still around.
Class "vtkOpenGLTextMapper" has 3 instances still around.
Class "vtkTextureObject" has 6 instances still around.
Class "vtkCellData" has 78 instances still around.
Class "vtkResliceImageViewerMeasurements" has 3 instances still around.
Class "vtkTransformPolyDataFilter" has 3 instances still around.
Class "vtkCollection" has 9 instances still around.
Class "vtkFrustumCoverageCuller" has 3 instances still around.
Class "vtkInformationIntegerVectorValue" has 45 instances still around.
Class "vtkInformationVector" has 861 instances still around.
Class "vtkPerspectiveTransform" has 6 instances still around.
Class "vtkResliceCursorPicker" has 3 instances still around.
Class "vtkPlaneCollection" has 3 instances still around.
Class "vtkResliceCursorActor" has 3 instances still around.
Class "vtkPointData" has 78 instances still around.
Class "vtkImageActor" has 6 instances still around.
Class "vtkWidgetEventTranslator" has 6 instances still around.
Class "class vtkBuffer<unsigned short>" has 3 instances still around.
Class "vtkProperty2D" has 6 instances still around.
Class "vtkCompositeDataPipeline" has 153 instances still around.
Class "vtkMatrix3x3" has 144 instances still around.
Class "vtkProp3DCollection" has 9 instances still around.
Class "vtkTrivialProducer" has 45 instances still around.
Class "vtkOpenGLIndexBufferObject" has 552 instances still around.
Class "vtkMatrix4x4" has 669 instances still around.
Class "vtkUnsignedShortArray" has 3 instances still around.
Class "class vtkBuffer<__int64>" has 54 instances still around.
Class "vtkPickingManager" has 3 instances still around.
Class "QVTKInteractor" has 3 instances still around.
Class "vtkCoordinate" has 30 instances still around.
Class "vtkImageMapToColors" has 3 instances still around.
Class "vtkBox" has 3 instances still around.
Class "vtkPlane" has 18 instances still around.
Class "vtkSimpleTransform" has 27 instances still around.
Class "class vtkBuffer<unsigned char>" has 15 instances still around.
Class "vtkPlaneSource" has 6 instances still around.
Class "vtkPoints" has 105 instances still around.
Class "vtkIntArray" has 6 instances still around.
Class "vtkInformation" has 1902 instances still around.
Class "vtkImageReslice" has 3 instances still around.
Class "vtkActorCollection" has 12 instances still around.
Class "vtkLine" has 12 instances still around.
Class "vtkInformationStringVectorValue" has 6 instances still around.
Class "vtkBoundedPlanePointPlacer" has 3 instances still around.
Class "vtkGenericOpenGLRenderWindow" has 3 instances still around.
Class "vtkMultiThreader" has 15 instances still around.
Class "vtkVolumeCollection" has 3 instances still around.
Class "vtkAssemblyPath" has 3 instances still around.
Class "vtkPropCollection" has 27 instances still around.
Class "vtkResliceCursorLineRepresentation" has 3 instances still around.
Class "vtkAssemblyNode" has 3 instances still around.
Class "vtkInformationIntegerPointerValue" has 24 instances still around.
Class "vtkSynchronizedTemplates3D" has 3 instances still around.
Class "vtkGenericCell" has 9 instances still around.
Class "vtkDICOMMetaData" has 3 instances still around.
Class "vtkPolyData" has 57 instances still around.
Class "vtkLookupTable" has 6 instances still around.
Class "vtkPixel" has 12 instances still around.
Class "class vtkBuffer<int>" has 6 instances still around.
Class "vtkPropPicker" has 6 instances still around.
Class "imriLocalizerVtkInteractionStyleImage" has 3 instances still around.
Class "vtkActor2D" has 6 instances still around.
Class "vtkOpenGLCamera" has 3 instances still around.
Class "vtkPlaneWidget" has 3 instances still around.
Class "vtkOpenGLVertexArrayObject" has 552 instances still around.
Class "vtkOpenGLActor" has 69 instances still around.
Class "vtkResliceCursorWidget" has 3 instances still around.
Class "vtkOpenGLPolyDataMapper" has 72 instances still around.
Class "vtkIdList" has 48 instances still around.
Class "vtkWorldPointPicker" has 6 instances still around.
Class "vtkEmptyCell" has 9 instances still around.
Class "vtkRectilinearSynchronizedTemplates" has 3 instances still around.
Class "vtkObserverMediator" has 3 instances still around.
Class "vtkConeSource" has 6 instances still around.
Class "vtkDoubleArray" has 66 instances still around.
Class "vtkInteractorStyleImage" has 3 instances still around.
Class "vtkMatrixToLinearTransform" has 9 instances still around.
Class "vtkAlgorithmOutput" has 93 instances still around.
Class "vtkCullerCollection" has 3 instances still around.
Class "vtkOpenGLRenderer" has 3 instances still around.
Class "vtkImageStencilData" has 3 instances still around.
Class "vtkInformationIntegerValue" has 1743 instances still around.
Class "vtkImageProperty" has 6 instances still around.
Class "vtkTextProperty" has 15 instances still around.
Class "vtkOpenGLPolyDataMapper2D" has 12 instances still around.
Class "vtkGridSynchronizedTemplates3D" has 3 instances still around.
Class "vtkOpenGLLight" has 3 instances still around.
Class "vtkTextRepresentation" has 3 instances still around.
Class "vtkCellArray" has 54 instances still around.
Class "vtkRendererCollection" has 3 instances still around.
Class "vtkClipPolyData" has 3 instances still around.
Class "vtkShaderProgram" has 9 instances still around.
Class "class vtkBuffer<float>" has 81 instances still around.
Class "vtkResliceCursor" has 3 instances still around.
Class "vtkCutter" has 3 instances still around.
Class "vtkOpenGLShaderCache" has 3 instances still around.
Class "vtkTDxInteractorStyleCamera" has 6 instances still around.
Class "vtkImageData" has 21 instances still around.
Class "vtkFloatArray" has 81 instances still around.
Class "vtkInformationStringValue" has 24 instances still around.
Class "vtkInformationExecutivePortVectorValue" has 93 instances still
around.
Class "vtkImageMapToWindowLevelColors" has 3 instances still around.
Class "vtkContourValues" has 15 instances still around.
Class "vtkIdTypeArray" has 54 instances still around.
Class "vtkTransform" has 276 instances still around.
Class "vtkLinearExtrusionFilter" has 6 instances still around.
Class "vtkOutlineSource" has 6 instances still around.
Class "vtkOpenGLVertexBufferObjectGroup" has 84 instances still around.
Class "vtkFieldData" has 84 instances still around.
Class "vtkTextWidget" has 3 instances still around.
Class "vtkOpenGLProperty" has 33 instances still around.
Class "class vtkBuffer<double>" has 66 instances still around.
Class "vtkScalarsToColors" has 6 instances still around.
Class "vtkOpenGLTexture" has 18 instances still around.
Class "vtkInformationDoubleVectorValue" has 45 instances still around.
Class "vtkLineSource" has 6 instances still around.
Class "vtkLightCollection" has 3 instances still around.
Class "vtkEvent" has 42 instances still around.
Class "vtkWidgetCallbackMapper" has 6 instances still around.
Class "vtkUnsignedCharArray" has 15 instances still around.
Class "vtkSphereSource" has 12 instances still around.
Class "vtkShader" has 27 instances still around.
Class "vtkTDxInteractorStyleSettings" has 6 instances still around.
Class "vtkCellPicker" has 6 instances still around.
Class "vtkStreamingDemandDrivenPipeline" has 45 instances still around.
Class "vtkResliceCursorPolyDataAlgorithm" has 3 instances still around.
Class "vtkTextureUnitManager" has 3 instances still around.
Class "vtkOpenGLVertexBufferObjectCache" has 3 instances still around.
Class "vtkActor2DCollection" has 3 instances still around.
Class "vtkAssemblyPaths" has 3 instances still around.
Class "vtkTimerLog" has 93 instances still around.
Class "vtkResliceImageViewer" has 3 instances still around.
Class "vtkCommand or subclass" has 135 instances still around.
Class "vtkOpenGLImageSliceMapper" has 6 instances still around.
Class "vtkInformationExecutivePortValue" has 126 instances still around.
Class "vtkFXAAOptions" has 3 instances still around.
/



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From david.gobbi at gmail.com  Tue Dec  4 13:22:50 2018
From: david.gobbi at gmail.com (David Gobbi)
Date: Tue, 4 Dec 2018 11:22:50 -0700
Subject: [vtkusers] Occurring vtkDebugLeaks even smartpointers are used
In-Reply-To: <1543933679005-0.post@n5.nabble.com>
References: <1543933679005-0.post@n5.nabble.com>
Message-ID: <CANwS1=GbgQVMizsdCXe543+o+zfqgttgFsnAvPYm14iaxa6YAw@mail.gmail.com>

Hi Ran,

It's good to see people using vtkDICOMReader instead of the old
vtkDICOMImageReader!

My guess is that vtkGenericOpenGLRenderWindow isn't being deleted, and it
is holding references (directly or indirectly) to all of the other objects
that are leaking.  And, of course, the QVTKOpenGLWidget holds the reference
to the vtkGenericOpenGLRenderWindow.

So either QVTKOpenGLWidget isn't being destroyed, or you are keeping an
extra reference to vtkGenericOpenGLRenderWindow in addition to the
reference kept by QVTKOpenGLWidget.  Once you fix the
vtkGenericOpenGLRenderWindow leak, then all the other leaks should vanish.

  David

On Tue, Dec 4, 2018 at 7:28 AM ran <kor1581 at gmail.com> wrote:

> I'm using vtk 8.1.0 for displaying DICOM images in three windows in Qt
> widget
> application in windows 10.
> For this mainly uses uses three instances vtkResliceImageViewer,
> vtkGenericOpenGLRenderWindow, vtkDICOMReader, vtkDICOMMetaData,
> vtkInteractorStyleImage
> also uses QVTKOpenGLWidget for fitting the images in Qt window.
> I'm using smart pointers for all the objects, for vtk uses vtkSmartPointer,
> Qt uses QPointer.
> While the application window closes occurring a long list of
> vtkDebugLeaks.
> Also, the application crashes while opening the second time.
> Is these vtkDebugLeaks affect the application working? or can ignore
> The list shows a long list which also includes classes not using and can't
> find main classes of causing the leaks.
> Even though uses smart pointers, why these leaks happen.
>
> Below shows the list of leaks,
>
> /vtkDebugLeaks has detected LEAKS!
> Class "vtkOpenGLRenderTimerLog" has 3 instances still around.
> Class "vtkOpenGLTextActor" has 6 instances still around.
> Class "vtkSynchronizedTemplatesCutter3D" has 3 instances still around.
> Class "vtk3DWidgetConnection" has 3 instances still around.
> Class "vtkOpenGLTextMapper" has 3 instances still around.
> Class "vtkTextureObject" has 6 instances still around.
> Class "vtkCellData" has 78 instances still around.
> Class "vtkResliceImageViewerMeasurements" has 3 instances still around.
> Class "vtkTransformPolyDataFilter" has 3 instances still around.
> Class "vtkCollection" has 9 instances still around.
> Class "vtkFrustumCoverageCuller" has 3 instances still around.
> Class "vtkInformationIntegerVectorValue" has 45 instances still around.
> Class "vtkInformationVector" has 861 instances still around.
> Class "vtkPerspectiveTransform" has 6 instances still around.
> Class "vtkResliceCursorPicker" has 3 instances still around.
> Class "vtkPlaneCollection" has 3 instances still around.
> Class "vtkResliceCursorActor" has 3 instances still around.
> Class "vtkPointData" has 78 instances still around.
> Class "vtkImageActor" has 6 instances still around.
> Class "vtkWidgetEventTranslator" has 6 instances still around.
> Class "class vtkBuffer<unsigned short>" has 3 instances still around.
> Class "vtkProperty2D" has 6 instances still around.
> Class "vtkCompositeDataPipeline" has 153 instances still around.
> Class "vtkMatrix3x3" has 144 instances still around.
> Class "vtkProp3DCollection" has 9 instances still around.
> Class "vtkTrivialProducer" has 45 instances still around.
> Class "vtkOpenGLIndexBufferObject" has 552 instances still around.
> Class "vtkMatrix4x4" has 669 instances still around.
> Class "vtkUnsignedShortArray" has 3 instances still around.
> Class "class vtkBuffer<__int64>" has 54 instances still around.
> Class "vtkPickingManager" has 3 instances still around.
> Class "QVTKInteractor" has 3 instances still around.
> Class "vtkCoordinate" has 30 instances still around.
> Class "vtkImageMapToColors" has 3 instances still around.
> Class "vtkBox" has 3 instances still around.
> Class "vtkPlane" has 18 instances still around.
> Class "vtkSimpleTransform" has 27 instances still around.
> Class "class vtkBuffer<unsigned char>" has 15 instances still around.
> Class "vtkPlaneSource" has 6 instances still around.
> Class "vtkPoints" has 105 instances still around.
> Class "vtkIntArray" has 6 instances still around.
> Class "vtkInformation" has 1902 instances still around.
> Class "vtkImageReslice" has 3 instances still around.
> Class "vtkActorCollection" has 12 instances still around.
> Class "vtkLine" has 12 instances still around.
> Class "vtkInformationStringVectorValue" has 6 instances still around.
> Class "vtkBoundedPlanePointPlacer" has 3 instances still around.
> Class "vtkGenericOpenGLRenderWindow" has 3 instances still around.
> Class "vtkMultiThreader" has 15 instances still around.
> Class "vtkVolumeCollection" has 3 instances still around.
> Class "vtkAssemblyPath" has 3 instances still around.
> Class "vtkPropCollection" has 27 instances still around.
> Class "vtkResliceCursorLineRepresentation" has 3 instances still around.
> Class "vtkAssemblyNode" has 3 instances still around.
> Class "vtkInformationIntegerPointerValue" has 24 instances still around.
> Class "vtkSynchronizedTemplates3D" has 3 instances still around.
> Class "vtkGenericCell" has 9 instances still around.
> Class "vtkDICOMMetaData" has 3 instances still around.
> Class "vtkPolyData" has 57 instances still around.
> Class "vtkLookupTable" has 6 instances still around.
> Class "vtkPixel" has 12 instances still around.
> Class "class vtkBuffer<int>" has 6 instances still around.
> Class "vtkPropPicker" has 6 instances still around.
> Class "imriLocalizerVtkInteractionStyleImage" has 3 instances still around.
> Class "vtkActor2D" has 6 instances still around.
> Class "vtkOpenGLCamera" has 3 instances still around.
> Class "vtkPlaneWidget" has 3 instances still around.
> Class "vtkOpenGLVertexArrayObject" has 552 instances still around.
> Class "vtkOpenGLActor" has 69 instances still around.
> Class "vtkResliceCursorWidget" has 3 instances still around.
> Class "vtkOpenGLPolyDataMapper" has 72 instances still around.
> Class "vtkIdList" has 48 instances still around.
> Class "vtkWorldPointPicker" has 6 instances still around.
> Class "vtkEmptyCell" has 9 instances still around.
> Class "vtkRectilinearSynchronizedTemplates" has 3 instances still around.
> Class "vtkObserverMediator" has 3 instances still around.
> Class "vtkConeSource" has 6 instances still around.
> Class "vtkDoubleArray" has 66 instances still around.
> Class "vtkInteractorStyleImage" has 3 instances still around.
> Class "vtkMatrixToLinearTransform" has 9 instances still around.
> Class "vtkAlgorithmOutput" has 93 instances still around.
> Class "vtkCullerCollection" has 3 instances still around.
> Class "vtkOpenGLRenderer" has 3 instances still around.
> Class "vtkImageStencilData" has 3 instances still around.
> Class "vtkInformationIntegerValue" has 1743 instances still around.
> Class "vtkImageProperty" has 6 instances still around.
> Class "vtkTextProperty" has 15 instances still around.
> Class "vtkOpenGLPolyDataMapper2D" has 12 instances still around.
> Class "vtkGridSynchronizedTemplates3D" has 3 instances still around.
> Class "vtkOpenGLLight" has 3 instances still around.
> Class "vtkTextRepresentation" has 3 instances still around.
> Class "vtkCellArray" has 54 instances still around.
> Class "vtkRendererCollection" has 3 instances still around.
> Class "vtkClipPolyData" has 3 instances still around.
> Class "vtkShaderProgram" has 9 instances still around.
> Class "class vtkBuffer<float>" has 81 instances still around.
> Class "vtkResliceCursor" has 3 instances still around.
> Class "vtkCutter" has 3 instances still around.
> Class "vtkOpenGLShaderCache" has 3 instances still around.
> Class "vtkTDxInteractorStyleCamera" has 6 instances still around.
> Class "vtkImageData" has 21 instances still around.
> Class "vtkFloatArray" has 81 instances still around.
> Class "vtkInformationStringValue" has 24 instances still around.
> Class "vtkInformationExecutivePortVectorValue" has 93 instances still
> around.
> Class "vtkImageMapToWindowLevelColors" has 3 instances still around.
> Class "vtkContourValues" has 15 instances still around.
> Class "vtkIdTypeArray" has 54 instances still around.
> Class "vtkTransform" has 276 instances still around.
> Class "vtkLinearExtrusionFilter" has 6 instances still around.
> Class "vtkOutlineSource" has 6 instances still around.
> Class "vtkOpenGLVertexBufferObjectGroup" has 84 instances still around.
> Class "vtkFieldData" has 84 instances still around.
> Class "vtkTextWidget" has 3 instances still around.
> Class "vtkOpenGLProperty" has 33 instances still around.
> Class "class vtkBuffer<double>" has 66 instances still around.
> Class "vtkScalarsToColors" has 6 instances still around.
> Class "vtkOpenGLTexture" has 18 instances still around.
> Class "vtkInformationDoubleVectorValue" has 45 instances still around.
> Class "vtkLineSource" has 6 instances still around.
> Class "vtkLightCollection" has 3 instances still around.
> Class "vtkEvent" has 42 instances still around.
> Class "vtkWidgetCallbackMapper" has 6 instances still around.
> Class "vtkUnsignedCharArray" has 15 instances still around.
> Class "vtkSphereSource" has 12 instances still around.
> Class "vtkShader" has 27 instances still around.
> Class "vtkTDxInteractorStyleSettings" has 6 instances still around.
> Class "vtkCellPicker" has 6 instances still around.
> Class "vtkStreamingDemandDrivenPipeline" has 45 instances still around.
> Class "vtkResliceCursorPolyDataAlgorithm" has 3 instances still around.
> Class "vtkTextureUnitManager" has 3 instances still around.
> Class "vtkOpenGLVertexBufferObjectCache" has 3 instances still around.
> Class "vtkActor2DCollection" has 3 instances still around.
> Class "vtkAssemblyPaths" has 3 instances still around.
> Class "vtkTimerLog" has 93 instances still around.
> Class "vtkResliceImageViewer" has 3 instances still around.
> Class "vtkCommand or subclass" has 135 instances still around.
> Class "vtkOpenGLImageSliceMapper" has 6 instances still around.
> Class "vtkInformationExecutivePortValue" has 126 instances still around.
> Class "vtkFXAAOptions" has 3 instances still around.
> /
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
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>
> Please keep messages on-topic and check the VTK FAQ at:
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From aborsic at ne-scientific.com  Tue Dec  4 14:20:23 2018
From: aborsic at ne-scientific.com (aborsic at ne-scientific.com)
Date: Tue, 4 Dec 2018 14:20:23 -0500
Subject: [vtkusers] Strange Visualization Results With Transparency on
 Polydata
Message-ID: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>

Dear All,

 

I am experiencing some strange visualization results in VTK 8.1.0 on
polydata using a LUT with some transparency for some entries and opacity for
others.

 

I am attaching a Python example to reproduce the problem. The code creates
two polydata spheres which are spatially separated. An array with a uniform
values of 1 is associated to cell data for the first sphere, and an array
with values of 2 to the second sphere. The two spheres are appended together
for convenience with a polydata append filter. 

 

A LUT is created with two entries, solid red RGBA = (1,0,0,1) and
transparent green RGBA = (0,1,0,0.2), the scalar range is set to (1,2)
mapping the cells of the first sphere to the first LUT entry and the cells
of the second sphere to the second LUT entry. 

 

As shown by the attached rendering the red sphere also appears as
semi-transparent, and in a wired way, if rotated some portions of the sphere
seem more transparent, and others less. Setting the second LUT entry to
solid green RGBA = (0,1,0,1) makes both spheres opaque - this is expected,
but why does modifying the alpha channel of the second LUT entry affects
also the appearance of the first sphere?

 

I am experiencing this on two different Windows 10 computers equipped with
modern NVIDIA GPUs, and on a 2017 iMac 27 running Mojave, all these
computers have VTK 8.1.0.

 

Any comment / advice is welcome,

 

Thanks, Best Regards,

 

Andrea

 

 

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From eric.fahlgren at smith-nephew.com  Tue Dec  4 15:47:29 2018
From: eric.fahlgren at smith-nephew.com (Fahlgren, Eric)
Date: Tue, 4 Dec 2018 20:47:29 +0000
Subject: [vtkusers] Strange Visualization Results With Transparency on
 Polydata
In-Reply-To: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>
References: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>
Message-ID: <SN4PR0501MB3741BCA681F5CBFC9A0BB9A3DCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>

Hi Andrea,

Z-sorting of transparent polygons is always a problem.  You can cure it by turning on depth peeling, but it comes at a cost (for our models it makes renders take almost twice as long).

# create a rendering window and renderer
ren = vtk.vtkRenderer()
ren.SetUseDepthPeeling(True)

Eric

From: vtkusers <vtkusers-bounces at public.kitware.com> On Behalf Of aborsic at ne-scientific.com
Sent: Tuesday, December 4, 2018 11:20 AM
To: vtkusers at public.kitware.com
Subject: [vtkusers] Strange Visualization Results With Transparency on Polydata

Dear All,

I am experiencing some strange visualization results in VTK 8.1.0 on polydata using a LUT with some transparency for some entries and opacity for others.

I am attaching a Python example to reproduce the problem. The code creates two polydata spheres which are spatially separated. An array with a uniform values of 1 is associated to cell data for the first sphere, and an array with values of 2 to the second sphere. The two spheres are appended together for convenience with a polydata append filter.

A LUT is created with two entries, solid red RGBA = (1,0,0,1) and transparent green RGBA = (0,1,0,0.2), the scalar range is set to (1,2) mapping the cells of the first sphere to the first LUT entry and the cells of the second sphere to the second LUT entry.

As shown by the attached rendering the red sphere also appears as semi-transparent, and in a wired way, if rotated some portions of the sphere seem more transparent, and others less. Setting the second LUT entry to solid green RGBA = (0,1,0,1) makes both spheres opaque - this is expected, but why does modifying the alpha channel of the second LUT entry affects also the appearance of the first sphere?

I am experiencing this on two different Windows 10 computers equipped with modern NVIDIA GPUs, and on a 2017 iMac 27 running Mojave, all these computers have VTK 8.1.0.

Any comment / advice is welcome,

Thanks, Best Regards,

Andrea


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From david.gobbi at gmail.com  Tue Dec  4 16:00:25 2018
From: david.gobbi at gmail.com (David Gobbi)
Date: Tue, 4 Dec 2018 14:00:25 -0700
Subject: [vtkusers] Strange Visualization Results With Transparency on
 Polydata
In-Reply-To: <SN4PR0501MB3741BCA681F5CBFC9A0BB9A3DCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
References: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>
 <SN4PR0501MB3741BCA681F5CBFC9A0BB9A3DCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
Message-ID: <CANwS1=EqhY9_YnK+JWmGbWx4uN36mBRaUv1g6WW++izTQwbBbw@mail.gmail.com>

What Eric says is true, depth peeling or Z-sorting is needed for
transparent polydata.

Here's a long-ish explanation of why the red sphere is rendering wrong:
since the mapper uses a lookup table that contains alpha values below 1.0,
VTK decides to use the translucent rendering pass instead of the opaque
rendering pass.  In the translucent rendering pass, VTK doesn't write to
the z-buffer, so unless depth peeling is enabled (or polys are pre-sorted
back-to-front) you'll end up with bad results.

  David

On Tue, Dec 4, 2018 at 1:47 PM Fahlgren, Eric <
eric.fahlgren at smith-nephew.com> wrote:

> Hi Andrea,
>
>
>
> Z-sorting of transparent polygons is always a problem.  You can cure it by
> turning on depth peeling, but it comes at a cost (for our models it makes
> renders take almost twice as long).
>
>
>
> # create a rendering window and renderer
>
> ren = vtk.vtkRenderer()
>
> *ren.SetUseDepthPeeling(True)*
>
>
>
> Eric
>
>
>
> *From:* vtkusers <vtkusers-bounces at public.kitware.com> * On Behalf Of *
> aborsic at ne-scientific.com
> *Sent:* Tuesday, December 4, 2018 11:20 AM
> *To:* vtkusers at public.kitware.com
> *Subject:* [vtkusers] Strange Visualization Results With Transparency on
> Polydata
>
>
>
> Dear All,
>
>
>
> I am experiencing some strange visualization results in VTK 8.1.0 on
> polydata using a LUT with some transparency for some entries and opacity
> for others.
>
>
>
> I am attaching a Python example to reproduce the problem. The code creates
> two polydata spheres which are spatially separated. An array with a uniform
> values of 1 is associated to cell data for the first sphere, and an array
> with values of 2 to the second sphere. The two spheres are appended
> together for convenience with a polydata append filter.
>
>
>
> A LUT is created with two entries, solid red RGBA = (1,0,0,1) and
> transparent green RGBA = (0,1,0,0.2), the scalar range is set to (1,2)
> mapping the cells of the first sphere to the first LUT entry and the cells
> of the second sphere to the second LUT entry.
>
>
>
> As shown by the attached rendering the red sphere also appears as
> semi-transparent, and in a wired way, if rotated some portions of the
> sphere seem more transparent, and others less. Setting the second LUT entry
> to solid green RGBA = (0,1,0,1) makes both spheres opaque ? this is
> expected, but why does modifying the alpha channel of the second LUT entry
> affects also the appearance of the first sphere?
>
>
>
> I am experiencing this on two different Windows 10 computers equipped with
> modern NVIDIA GPUs, and on a 2017 iMac 27 running Mojave, all these
> computers have VTK 8.1.0.
>
>
>
> Any comment / advice is welcome,
>
>
>
> Thanks, Best Regards,
>
>
>
> Andrea
>
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From ken.martin at kitware.com  Tue Dec  4 16:24:05 2018
From: ken.martin at kitware.com (Ken Martin)
Date: Tue, 4 Dec 2018 16:24:05 -0500
Subject: [vtkusers] Strange Visualization Results With Transparency on
 Polydata
In-Reply-To: <CANwS1=EqhY9_YnK+JWmGbWx4uN36mBRaUv1g6WW++izTQwbBbw@mail.gmail.com>
References: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>
 <SN4PR0501MB3741BCA681F5CBFC9A0BB9A3DCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
 <CANwS1=EqhY9_YnK+JWmGbWx4uN36mBRaUv1g6WW++izTQwbBbw@mail.gmail.com>
Message-ID: <CANXz0SYabiw3DPgsY3HhmsL3Z1r8b-r2bUSxv8r5ZMiZmUDwSw@mail.gmail.com>

In newer versions of VTK (8.2 maybe) this issue should not be as noticeable
as we changed how we handle transparent rendering to yield better (but
still not perfect) results.

On Tue, Dec 4, 2018 at 4:00 PM David Gobbi <david.gobbi at gmail.com> wrote:

> What Eric says is true, depth peeling or Z-sorting is needed for
> transparent polydata.
>
> Here's a long-ish explanation of why the red sphere is rendering wrong:
> since the mapper uses a lookup table that contains alpha values below 1.0,
> VTK decides to use the translucent rendering pass instead of the opaque
> rendering pass.  In the translucent rendering pass, VTK doesn't write to
> the z-buffer, so unless depth peeling is enabled (or polys are pre-sorted
> back-to-front) you'll end up with bad results.
>
>   David
>
> On Tue, Dec 4, 2018 at 1:47 PM Fahlgren, Eric <
> eric.fahlgren at smith-nephew.com> wrote:
>
>> Hi Andrea,
>>
>>
>>
>> Z-sorting of transparent polygons is always a problem.  You can cure it
>> by turning on depth peeling, but it comes at a cost (for our models it
>> makes renders take almost twice as long).
>>
>>
>>
>> # create a rendering window and renderer
>>
>> ren = vtk.vtkRenderer()
>>
>> *ren.SetUseDepthPeeling(True)*
>>
>>
>>
>> Eric
>>
>>
>>
>> *From:* vtkusers <vtkusers-bounces at public.kitware.com> * On Behalf Of *
>> aborsic at ne-scientific.com
>> *Sent:* Tuesday, December 4, 2018 11:20 AM
>> *To:* vtkusers at public.kitware.com
>> *Subject:* [vtkusers] Strange Visualization Results With Transparency on
>> Polydata
>>
>>
>>
>> Dear All,
>>
>>
>>
>> I am experiencing some strange visualization results in VTK 8.1.0 on
>> polydata using a LUT with some transparency for some entries and opacity
>> for others.
>>
>>
>>
>> I am attaching a Python example to reproduce the problem. The code
>> creates two polydata spheres which are spatially separated. An array with a
>> uniform values of 1 is associated to cell data for the first sphere, and an
>> array with values of 2 to the second sphere. The two spheres are appended
>> together for convenience with a polydata append filter.
>>
>>
>>
>> A LUT is created with two entries, solid red RGBA = (1,0,0,1) and
>> transparent green RGBA = (0,1,0,0.2), the scalar range is set to (1,2)
>> mapping the cells of the first sphere to the first LUT entry and the cells
>> of the second sphere to the second LUT entry.
>>
>>
>>
>> As shown by the attached rendering the red sphere also appears as
>> semi-transparent, and in a wired way, if rotated some portions of the
>> sphere seem more transparent, and others less. Setting the second LUT entry
>> to solid green RGBA = (0,1,0,1) makes both spheres opaque ? this is
>> expected, but why does modifying the alpha channel of the second LUT entry
>> affects also the appearance of the first sphere?
>>
>>
>>
>> I am experiencing this on two different Windows 10 computers equipped
>> with modern NVIDIA GPUs, and on a 2017 iMac 27 running Mojave, all these
>> computers have VTK 8.1.0.
>>
>>
>>
>> Any comment / advice is welcome,
>>
>>
>>
>> Thanks, Best Regards,
>>
>>
>>
>> Andrea
>>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>


-- 
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
101 East Weaver Street
Carrboro, North Carolina
27510 USA

This communication, including all attachments, contains confidential and
legally privileged information, and it is intended only for the use of the
addressee.  Access to this email by anyone else is unauthorized. If you are
not the intended recipient, any disclosure, copying, distribution or any
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received this communication in error please notify us immediately and
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From vincentrivola at hotmail.com  Tue Dec  4 16:26:17 2018
From: vincentrivola at hotmail.com (vincentrivola)
Date: Tue, 4 Dec 2018 14:26:17 -0700 (MST)
Subject: [vtkusers] Strange Visualization Results With Transparency on
 Polydata
In-Reply-To: <CANwS1=EqhY9_YnK+JWmGbWx4uN36mBRaUv1g6WW++izTQwbBbw@mail.gmail.com>
References: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>
 <SN4PR0501MB3741BCA681F5CBFC9A0BB9A3DCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
 <CANwS1=EqhY9_YnK+JWmGbWx4uN36mBRaUv1g6WW++izTQwbBbw@mail.gmail.com>
Message-ID: <1543958777152-0.post@n5.nabble.com>

Is there a filter to pre sort the polydata element in the Z direction?



--
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From eric.fahlgren at smith-nephew.com  Tue Dec  4 17:01:47 2018
From: eric.fahlgren at smith-nephew.com (Fahlgren, Eric)
Date: Tue, 4 Dec 2018 22:01:47 +0000
Subject: [vtkusers] Strange Visualization Results With Transparency on
 Polydata
In-Reply-To: <CANXz0SYabiw3DPgsY3HhmsL3Z1r8b-r2bUSxv8r5ZMiZmUDwSw@mail.gmail.com>
References: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>
 <SN4PR0501MB3741BCA681F5CBFC9A0BB9A3DCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
 <CANwS1=EqhY9_YnK+JWmGbWx4uN36mBRaUv1g6WW++izTQwbBbw@mail.gmail.com>
 <CANXz0SYabiw3DPgsY3HhmsL3Z1r8b-r2bUSxv8r5ZMiZmUDwSw@mail.gmail.com>
Message-ID: <SN4PR0501MB3741FA34738D5ADFAD96F00ADCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>

That?s excellent news.  This is a very difficult problem, which I?ve watched evolve over many years and it?s great to see the payoff from all those brain cycles that have been applied to it.

Is there any means to manually force render depth for actors/parts?  We have cases where we draw a couple of overlapped X-ray images, transparent so you can see the overlap to align them.  They are overlaid with lines (for example from femur head to trochlear groove), all in the same plane with the images.  Sometimes it looks fine, sometimes the line is hidden until you rotate the image by 1e-6 degrees or zoom by a factor of almost nothing, at which point the lines jump in front; zoom a little more and they go behind.  Draw order is correct, image first, then lines ?on top?, but when the image is oriented exactly in the plane of the view, then this issue pops up. (Our hack-around is to put the lines some small increment in front of the plane of the images.)  As I recall, we tried about five years ago to stick something into vtkRenderer to do this as a proof of concept, but never got anywhere near production with it.

From: Ken Martin <ken.martin at kitware.com>
Sent: Tuesday, December 4, 2018 1:24 PM
To: David Gobbi <david.gobbi at gmail.com>
Cc: Andrea Borsic <aborsic at ne-scientific.com>; Fahlgren, Eric <eric.fahlgren at smith-nephew.com>; vtkusers at public.kitware.com
Subject: Re: [vtkusers] Strange Visualization Results With Transparency on Polydata

In newer versions of VTK (8.2 maybe) this issue should not be as noticeable as we changed how we handle transparent rendering to yield better (but still not perfect) results.

On Tue, Dec 4, 2018 at 4:00 PM David Gobbi <david.gobbi at gmail.com<mailto:david.gobbi at gmail.com>> wrote:
What Eric says is true, depth peeling or Z-sorting is needed for transparent polydata.

Here's a long-ish explanation of why the red sphere is rendering wrong: since the mapper uses a lookup table that contains alpha values below 1.0, VTK decides to use the translucent rendering pass instead of the opaque rendering pass.  In the translucent rendering pass, VTK doesn't write to the z-buffer, so unless depth peeling is enabled (or polys are pre-sorted back-to-front) you'll end up with bad results.

  David

On Tue, Dec 4, 2018 at 1:47 PM Fahlgren, Eric <eric.fahlgren at smith-nephew.com<mailto:eric.fahlgren at smith-nephew.com>> wrote:
Hi Andrea,

Z-sorting of transparent polygons is always a problem.  You can cure it by turning on depth peeling, but it comes at a cost (for our models it makes renders take almost twice as long).

# create a rendering window and renderer
ren = vtk.vtkRenderer()
ren.SetUseDepthPeeling(True)

Eric

From: vtkusers <vtkusers-bounces at public.kitware.com<mailto:vtkusers-bounces at public.kitware.com>> On Behalf Of aborsic at ne-scientific.com<mailto:aborsic at ne-scientific.com>
Sent: Tuesday, December 4, 2018 11:20 AM
To: vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>
Subject: [vtkusers] Strange Visualization Results With Transparency on Polydata

Dear All,

I am experiencing some strange visualization results in VTK 8.1.0 on polydata using a LUT with some transparency for some entries and opacity for others.

I am attaching a Python example to reproduce the problem. The code creates two polydata spheres which are spatially separated. An array with a uniform values of 1 is associated to cell data for the first sphere, and an array with values of 2 to the second sphere. The two spheres are appended together for convenience with a polydata append filter.

A LUT is created with two entries, solid red RGBA = (1,0,0,1) and transparent green RGBA = (0,1,0,0.2), the scalar range is set to (1,2) mapping the cells of the first sphere to the first LUT entry and the cells of the second sphere to the second LUT entry.

As shown by the attached rendering the red sphere also appears as semi-transparent, and in a wired way, if rotated some portions of the sphere seem more transparent, and others less. Setting the second LUT entry to solid green RGBA = (0,1,0,1) makes both spheres opaque ? this is expected, but why does modifying the alpha channel of the second LUT entry affects also the appearance of the first sphere?

I am experiencing this on two different Windows 10 computers equipped with modern NVIDIA GPUs, and on a 2017 iMac 27 running Mojave, all these computers have VTK 8.1.0.

Any comment / advice is welcome,

Thanks, Best Regards,

Andrea
_______________________________________________
Powered by www.kitware.com<http://www.kitware.com>

Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html

Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ

Search the list archives at: http://markmail.org/search/?q=vtkusers

Follow this link to subscribe/unsubscribe:
https://public.kitware.com/mailman/listinfo/vtkusers


--
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
101 East Weaver Street
Carrboro, North Carolina
27510 USA
This communication, including all attachments, contains confidential and legally privileged information, and it is intended only for the use of the addressee.  Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken in reliance on it is prohibited and may be unlawful. If you received this communication in error please notify us immediately and destroy the original message.  Thank you.
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From trlsmax at gmail.com  Tue Dec  4 23:04:25 2018
From: trlsmax at gmail.com (Max Chen)
Date: Tue, 4 Dec 2018 21:04:25 -0700 (MST)
Subject: [vtkusers] how to render VTK into user provided FBO
In-Reply-To: <CANXz0Sb83L3bd1OtG1e8cORY_uvdT8KHXeHsdiwr69vrf-pVtg@mail.gmail.com>
References: <1543894513711-0.post@n5.nabble.com>
 <CANXz0Sb83L3bd1OtG1e8cORY_uvdT8KHXeHsdiwr69vrf-pVtg@mail.gmail.com>
Message-ID: <1543982665114-0.post@n5.nabble.com>

Thank you. Now I have a working prototype.
But I get a strangle issue, I can only resize the offscreen
vtkGenericOpenGLRenderWindow 3 times, otherwise I get error like :
ERROR: In E:\projects\VTK-8.1.2\Rendering\OpenGL2\vtkOpenGLActor.cxx, line
107
vtkOpenGLActor (0B2C4C10): failed after Render 1 OpenGL errors detected
 0:(1285)out of memory

the resize code is :
void MyVTKRenderer::UpdateSize(unsigned int w, unsigned int h)
{
	if (w == m_Width && h == m_Height)
		return;

	if (w == 0 || h == 0)
		return;

	m_Width = w;
	m_Height = h;

	// resize the render window
	m_vtkRenderWindow->SetSize(m_Width, m_Height);
	m_vtkRenderWindow->FullScreenOn();
	m_vtkRenderWindow->OffScreenRenderingOn();
	//m_vtkRenderWindow->SetMultiSamples(0);
	m_vtkRenderWindow->Modified();
	m_vtkRenderWindowInteractor->UpdateSize(m_Width, m_Height);
	m_vtkRenderWindowInteractor->Modified();
	m_IsInited = false;

	// delete old fbo
	glDeleteBuffers(1, &m_fbo);
	glDeleteBuffers(1, &m_rbo);
	glDeleteTextures(1, &m_tex);

	// create a texture object
	glGenTextures(1, &m_tex);
	glBindTexture(GL_TEXTURE_2D, m_tex);
	glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
	glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, m_Width, m_Height, 0, GL_RGB,
GL_UNSIGNED_BYTE, 0);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
	glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
	glBindTexture(GL_TEXTURE_2D, 0);
	// create a renderbuffer object to store depth info
	glGenRenderbuffers(1, &m_rbo);
	glBindRenderbuffer(GL_RENDERBUFFER, m_rbo);
	glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, m_Width,
m_Height);
	glBindRenderbuffer(GL_RENDERBUFFER, 0);

	// create a framebuffer object
	glGenFramebuffers(1, &m_fbo);
	glBindFramebuffer(GL_FRAMEBUFFER, m_fbo);
	glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D,
m_tex, 0);
	glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, m_rbo);
	glBindFramebuffer(GL_FRAMEBUFFER, 0);
}

Another issue is , these code can't work on VTK-8.2 rc1



--
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From trlsmax at gmail.com  Tue Dec  4 23:05:56 2018
From: trlsmax at gmail.com (Max Chen)
Date: Tue, 4 Dec 2018 21:05:56 -0700 (MST)
Subject: [vtkusers] VTK with imgui
In-Reply-To: <e7dde42c-497f-2922-1ae0-2441006eb312@compintensehpc.com>
References: <e7dde42c-497f-2922-1ae0-2441006eb312@compintensehpc.com>
Message-ID: <1543982756780-0.post@n5.nabble.com>

Hi Paul
Please check  https://github.com/trlsmax/imgui-vtk
<https://github.com/trlsmax/imgui-vtk>  
this is a working prototype



--
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From kor1581 at gmail.com  Tue Dec  4 23:48:31 2018
From: kor1581 at gmail.com (ran)
Date: Tue, 4 Dec 2018 21:48:31 -0700 (MST)
Subject: [vtkusers] Occurring vtkDebugLeaks even smartpointers are used
In-Reply-To: <CANwS1=GbgQVMizsdCXe543+o+zfqgttgFsnAvPYm14iaxa6YAw@mail.gmail.com>
References: <1543933679005-0.post@n5.nabble.com>
 <CANwS1=GbgQVMizsdCXe543+o+zfqgttgFsnAvPYm14iaxa6YAw@mail.gmail.com>
Message-ID: <1543985311135-0.post@n5.nabble.com>

Thank you very much for the support,
My QVTKOpenGLWidget, vtkGenericOpenGLRenderWindow related code is like this
as per vtk tutorial

The app has a main Qt widget file

*/widget.h declaration file/*

     QPointer<QHBoxLayout> m_loMain;   

    vtkNew <vtkGenericOpenGLRenderWindow> m_vtkRenderWindow1;
    QPointer <QVTKOpenGLWidget> m_vtkWgtWin1;

    vtkNew <vtkGenericOpenGLRenderWindow> m_vtkRenderWindow2;
    QPointer <QVTKOpenGLWidget> m_vtkWgtWin2;

    vtkNew <vtkGenericOpenGLRenderWindow> m_vtkRenderWindow3;
    QPointer <QVTKOpenGLWidget> m_vtkWgtWin3;

*/and defined in widget.cpp constructor/*

   QPointer<QHBoxLayout> m_loMain;   

   m_vtkWgtWin1 = new QVTKOpenGLWidget(this);
   m_vtkWgtWin1->SetRenderWindow(m_vtkRenderWindow1);
   m_loMain->addWidget(m_vtkWgtWin1);

   m_vtkWgtWin2 = new QVTKOpenGLWidget(this);
   m_vtkWgtWin2->SetRenderWindow(m_vtkRenderWindow2);
   m_loMain->addWidget(m_vtkWgtWin2);

   m_vtkWgtWin3 = new QVTKOpenGLWidget(this);
   m_vtkWgtWin3>SetRenderWindow(m_vtkRenderWindow3);
   m_loMain->addWidget(m_vtkWgtWin3);

*/and in app main class/*

    // before initializing QApplication, set the default surface format.
    QSurfaceFormat fmt = QVTKOpenGLWidget::defaultFormat();
    fmt.setSamples(0);
    QSurfaceFormat::setDefaultFormat(fmt);

have any issue in this code?

*/Also i tried with the format /*
QVTKOpenGLWidget::SetRenderWindow(vtkGenericOpenGLRenderWindow::Get());
but this also not solving the issue



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From gdeee at web.de  Wed Dec  5 02:47:58 2018
From: gdeee at web.de (gdeee)
Date: Wed, 5 Dec 2018 08:47:58 +0100
Subject: [vtkusers] vtkChartMatrix with DrawAxesAtOriginOn tick and grid
 disappear
Message-ID: <0f94ce77-ce29-c615-7ff9-7b4ea81b9d91@web.de>

Hello,

I am trying to render two vtkCharts side by side using vtkChartMatrix.
with the coordinate axis at the origin.

Therefore I have tested following example which runs fine:
https://github.com/Kitware/VTK/blob/master/Charts/Core/Testing/Cxx/TestChartMatrix.cxx

However if I add

static_cast<vtkChartXY*>(chart)->DrawAxesAtOriginOn();

for each chart, the tick of the axis gets lost and the background grid
as well.

Any idea what the problem is?


From trlsmax at gmail.com  Wed Dec  5 03:25:27 2018
From: trlsmax at gmail.com (Max Chen)
Date: Wed, 5 Dec 2018 01:25:27 -0700 (MST)
Subject: [vtkusers] VTK with imgui
In-Reply-To: <e7dde42c-497f-2922-1ae0-2441006eb312@compintensehpc.com>
References: <e7dde42c-497f-2922-1ae0-2441006eb312@compintensehpc.com>
Message-ID: <1543998327444-0.post@n5.nabble.com>

Everything works now. Code is update to github repo.



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From trlsmax at gmail.com  Wed Dec  5 03:26:39 2018
From: trlsmax at gmail.com (Max Chen)
Date: Wed, 5 Dec 2018 01:26:39 -0700 (MST)
Subject: [vtkusers] how to render VTK into user provided FBO
In-Reply-To: <1543982665114-0.post@n5.nabble.com>
References: <1543894513711-0.post@n5.nabble.com>
 <CANXz0Sb83L3bd1OtG1e8cORY_uvdT8KHXeHsdiwr69vrf-pVtg@mail.gmail.com>
 <1543982665114-0.post@n5.nabble.com>
Message-ID: <1543998399385-0.post@n5.nabble.com>

Everything works now. Code is update to github repo.

I have to remove the actor before resize the vtkGenericOpenGLRenderWindow
and add it back.



--
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From pdhahn at compintensehpc.com  Wed Dec  5 03:42:39 2018
From: pdhahn at compintensehpc.com (Paul Douglas Hahn)
Date: Wed, 5 Dec 2018 02:42:39 -0600
Subject: [vtkusers] VTK with imgui
In-Reply-To: <1543998327444-0.post@n5.nabble.com>
References: <e7dde42c-497f-2922-1ae0-2441006eb312@compintensehpc.com>
 <1543998327444-0.post@n5.nabble.com>
Message-ID: <c7b00283-e822-99a3-10a5-f3e80cd7095b@compintensehpc.com>

Let's all give Max Chen a hearty "thank you!" for this work! Hooray!

I for one am grateful because now there is an expeditious alternative to 
Qt, at least for certain types of applications where the look and feel 
of ImGUI makes sense, when one wants to use VTK together with "standard" 
control widgets.

On 12/5/18 2:25 AM, Max Chen wrote:
> Everything works now. Code is update to github repo.
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>

-- 



From slavd88 at gmail.com  Wed Dec  5 12:08:12 2018
From: slavd88 at gmail.com (bdemin)
Date: Wed, 5 Dec 2018 10:08:12 -0700 (MST)
Subject: [vtkusers] Problems importing STL and VRML files to VTK
Message-ID: <1544029692375-0.post@n5.nabble.com>

I'm trying to import a CAD assembly from SolidWorks to VTK using vtkSTLReader
and vtkVRMLImporter in Python. From my understanding, these are the only 3D
formats VTK is able to read from SolidWorks.

Doing that, I encountered 2 issues:
1) When importing an STL part, is it possible to scale its size so that it
will fit my original SolidWorks part? After adding the actor of the STL
part, it seems to give the part an arbitrary origin and scale.

2) How can I import a VRML 3D model and assign an actor to it?
What I fail to understand is why the VRMLImporter is creating the renderer
without any artist involved. With vtkSTLReader or VTKSources (cube, cone,
etc) I assign their mappers to an actor for applying transformations or
other functions on the artists. With VRML there is no artist which
corresponds to the 3D object in all examples I've seen. How can I do that?



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From sk.shadabanwar at gmail.com  Wed Dec  5 14:08:34 2018
From: sk.shadabanwar at gmail.com (shadab anwar)
Date: Wed, 5 Dec 2018 14:08:34 -0500
Subject: [vtkusers] Problem with color and shading when rendering
 vtkimagedata
Message-ID: <CAEW39-qybN8px+oaCQ_LywOFHVQK0JGpy3kSfjc+FKS_6tnj1g@mail.gmail.com>

Hey amigos,

VTK noob here!

I facing a few problems while rendering vtkimagedata. The code snippet as
follows,


 int X =4, Y=4, Z=4;

       imageData->SetDimensions(X,Y,Z);

       imageData->SetSpacing(1,1,1);

       imageData->AllocateScalars(VTK_INT,1);



 for (int k = 0; k < Z ; k++)

       {

           for (int j = 0; j < Y ; j++)

           {

               for (int i = 0; i < X ; i++)

               {

                   int* voxel =
static_cast<int*>(imageData->GetScalarPointer(i, j, k));

                      voxel[0] = 10;


               }

           }

       }


 for (int i=2;i!=-1;i--)

       {

       int* voxel = static_cast<int*>(imageData->GetScalarPointer(2,i,i));

        voxel[0]=0;

        }


    mapper->SetBlendModeToComposite();

     mapper->SetRequestedRenderModeToRayCast();

      mapper->SetInputData(imageData);

     compositeOpacity->AddPoint(10,1);

      color->AddRGBPoint(10,1,0,0);

     compositeOpacity->AddPoint(0,0);

       color->AddRGBPoint(0,0,0, 0);

       volumeProperty->SetAmbient(0.3);

        volumeProperty->SetDiffuse(0.4);

        volumeProperty->SetSpecular(0.8);

       volumeProperty->SetInterpolationType(0);

        volumeProperty->ShadeOn();

        volumeProperty->SetColor(color);

         volumeProperty->SetScalarOpacity(compositeOpacity);

          renderer->SetBackground(0.5, 0.5, 0.5);

        volume->SetMapper(mapper);

        volume->SetProperty(volumeProperty);

        renderer->AddViewProp(volume);

I am getting the below results,


[image: image for forum.jpg]  [image: image for forum2.jpg]
[image: image for forum3.jpg]


It can be seen that everytime I rotate my image I don't get a proper
shading and color for the object. I have tried changing the lightining
properties and shading properties but no sucess.

I would be really thankful if anyone could help me.


Just for your information I am mechanical engineering with a bit of
programming knowledge, so if my question is irrattional please forgive
me.




Best,

Shadab
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From kayarre at gmail.com  Wed Dec  5 15:47:59 2018
From: kayarre at gmail.com (Kurt Sansom)
Date: Wed, 5 Dec 2018 12:47:59 -0800
Subject: [vtkusers] vtk 8.2.rc2 and python 3.7.1 install weirdness
Message-ID: <CAHyF3ohQjh+osxG+eRPKZfFLUYLPnJ-dL20GpFwdk-yfnV=HyQ@mail.gmail.com>

Hi all,
  I am trying to build vmtk which builds ITK and VTK. I was able to get it
to all compile, but the python wrappers are getting installed in
${CMAKE_INSTALL_PREFIX}/lib/lib/python3.7/site-packages/vtkmodules

instead of
${CMAKE_INSTALL_PREFIX}/lib/python3.7/site-packages/vtkmodules

can someone help identify where the build is adding the additional /lib?

Regards,
 ~Kurt
-- 
Kurt Sansom
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From poweruserm at live.com.au  Wed Dec  5 19:06:26 2018
From: poweruserm at live.com.au (A Z)
Date: Thu, 6 Dec 2018 00:06:26 +0000
Subject: [vtkusers] Request about compiled version of VTK.
Message-ID: <SL2P216MB05886C4C86AEE1DD48D03F9A9AA90@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>

For the sake of people who are in secured environments, or are just
unable to successfully compile VTK on windows anyway,
IS it possible for VTK to compile 64 bit Windows .dll
files of VTK and offer those for public download, please?
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From scbiradar at gmail.com  Thu Dec  6 07:27:29 2018
From: scbiradar at gmail.com (Santosh Biradar)
Date: Thu, 6 Dec 2018 17:57:29 +0530
Subject: [vtkusers] vtkAVIWriter with renderer gradient background shows
 distinct lines
In-Reply-To: <CAB5Fpx5Fw2RiVB6xOoDA0D_UiSLc10m0zh1gv0neYmrsfe1P4Q@mail.gmail.com>
References: <CAPuniJO7z42tDjmG30RWx0CAdiH0O05=CX9bY18gPeVZCbFPqA@mail.gmail.com>
 <CAB5Fpx5RrvkQWA69ME1LDi85VmBVeR2M4MjRtPrvwAEcAL_cDA@mail.gmail.com>
 <CAPuniJPn17X9LLv6b5xR=m_izWtxjz+nP-X6_-0rQcoEqFDeeQ@mail.gmail.com>
 <CAB5Fpx7A8ydmH1aHr9kOv-GGBmEko-XHW-5-cQqr-z0fkJuwcA@mail.gmail.com>
 <YQBPR0101MB1859D7D5BBE54FF52F6ADAC5D8D10@YQBPR0101MB1859.CANPRD01.PROD.OUTLOOK.COM>
 <CAPuniJO6SkJ6WW_O7j1J3qyepPQW4uDPmTc-Pih68Jw2G0EXFg@mail.gmail.com>
 <CAB5Fpx5Fw2RiVB6xOoDA0D_UiSLc10m0zh1gv0neYmrsfe1P4Q@mail.gmail.com>
Message-ID: <CAPuniJPXnQ1hkm21JN=Fk29WY5K_NaFTEt=2LXXFcdSTKgkNEA@mail.gmail.com>

Sorry for the late reply Cory
I tried the following options via  vtkAVIWriter's SetCompressorFourCC()
method

'MSVC'(default) - works but gives the scattered lines in the background
for gradient background
'DIB' -  Full Frames (Uncompressed) - works well and removes the gradient
background problem - creates large AVI files (upto 300 MB for a 4-5 second
animation)
'LAGS' - Lagarith Lossless Codec - got unknown compressor error
'MJPG' - got unknown compressor error
'DIVX'  - got unknown compressor error
'XVID' - got unknown compressor error
'H264' - got unknown compressor error

Thanks,
Santosh

On Fri, Nov 30, 2018 at 7:51 PM Cory Quammen <cory.quammen at kitware.com>
wrote:

> Great, glad to hear it. What compression options did you settle on in
> case someone runs into this issue in the future?
> On Fri, Nov 30, 2018 at 8:30 AM Santosh Biradar <scbiradar at gmail.com>
> wrote:
> >
> > Thanks Cory. I was able to try different compression options and was
> able to remove the background lines appearing because of the gradient
> albeit with large size of the AVI files.
> > Thanks Andras for pointing me to an alternate to vtkAVIWriter. I will
> explore the MKV container.
> >
> > Santosh
> >
> > On Wed, Nov 28, 2018 at 1:01 PM Andras Lasso <lasso at queensu.ca> wrote:
> >>
> >> In 3D Slicer we use VP9 codec with MKV container and it works well. VP9
> is not as widely used as H264 but it is completely royalty-free and offers
> good compression ratio and acceptable speed even with lossless settings.
> >>
> >>
> >>
> >> We build required libraries (VP9, libwbm, yasm) using CMake superbuild
> on Windows/Linux/Mac. Container file reading/writing implementation is
> here:
> https://github.com/IGSIO/IGSIO/blob/master/Source/VideoIO/MKV/vtkMKVWriter.cxx,
> and VP9 codec is here:
> https://github.com/IGSIO/SlicerIGSIO/blob/master/VideoIO/Codecs/vtkVP9VolumeCodec.cxx
> .
> >>
> >>
> >>
> >> Andras
> >>
> >>
> >>
> >> From: vtkusers <vtkusers-bounces at public.kitware.com> On Behalf Of Cory
> Quammen
> >> Sent: Tuesday, November 27, 2018 10:11 AM
> >> To: santosh <scbiradar at gmail.com>
> >> Cc: vtkusers <vtkusers at vtk.org>
> >> Subject: Re: [vtkusers] vtkAVIWriter with renderer gradient background
> shows distinct lines
> >>
> >>
> >>
> >> I'm afraid I don't have a lot of experience with the AVI compression
> options. You might experiment with vtkAVIWriter::SetCompressorFourCC() to
> see if you can find a compressor that gives more satisfactory results.
> >>
> >>
> >>
> >> Personally I prefer to dump animation frames and assemble them with
> outside video software.
> >>
> >>
> >>
> >> Cory
> >>
> >>
> >>
> >> On Tue, Nov 27, 2018 at 9:26 AM Santosh Biradar <scbiradar at gmail.com>
> wrote:
> >>
> >> Thanks for the quick response Cory.
> >>
> >> I tried setting quality to 0,1,2. The quality of the movie was best for
> 2 and worst for 0 but the background remained the same in each case.
> >>
> >> The quality of the output of the  filter (in this case, a
> vtkContourFilter) reduces with reduction in SetQuality but the background
> remains of the same quality.
> >>
> >> There is no difference in the quality of the background.
> >>
> >>
> >>
> >> I also get the same behavior in Paraview's Save Animation feature
> (version 5.5 on windows)
> >>
> >>
> >>
> >> Thanks,
> >>
> >> Santosh
> >>
> >>
> >>
> >>
> >>
> >> On Tue, Nov 27, 2018 at 7:29 PM Cory Quammen <cory.quammen at kitware.com>
> wrote:
> >>
> >> Sounds like quantization/compression artifacts. You can try changing
> the quality setting to reduce compression via vtkAVIWriter::SetQuality().
> >>
> >>
> >>
> >> HTH,
> >>
> >> Cory
> >>
> >>
> >>
> >> On Tue, Nov 27, 2018 at 8:55 AM Santosh Biradar <scbiradar at gmail.com>
> wrote:
> >>
> >> I am trying to create a movie of an animation using vtkAVIWriter.
> >>
> >> The renderer has a gradient background. The .avi file created has
> distinct lines/bands in the background because of the gradient. Is it
> possible to get rid of these lines. I notice that if I use a vtkBMPWriter
> and write an image, the image seems fine without any such lines/bands.
> >>
> >>
> >>
> >> A code snippet of what I am doing:
> >>
> >>
> >>
> >> window_to_image = vtk.vtkWindowToImageFilter()
> >> window_to_image.SetInput(renWin.GetRenderWindow())
> >> window_to_image.SetInputBufferTypeToRGB()
> >> window_to_image.ReadFrontBufferOff()
> >>
> >> writer = vtk.vtkAVIWriter()
> >> writer.SetInputConnection(window_to_image.GetOutputPort())
> >>
> >> I am running python wrapper of VTK-6.3.0 on windows
> >>
> >>
> >>
> >> Thanks,
> >>
> >> Santosh
> >>
> >>
> >>
> >> _______________________________________________
> >> Powered by www.kitware.com
> >>
> >> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
> >>
> >> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
> >>
> >> Search the list archives at: http://markmail.org/search/?q=vtkusers
> >>
> >> Follow this link to subscribe/unsubscribe:
> >> https://public.kitware.com/mailman/listinfo/vtkusers
> >>
> >>
> >>
> >>
> >> --
> >>
> >> Cory Quammen
> >> Staff R&D Engineer
> >> Kitware, Inc.
> >>
> >>
> >>
> >>
> >> --
> >>
> >> Cory Quammen
> >> Staff R&D Engineer
> >> Kitware, Inc.
>
>
>
> --
> Cory Quammen
> Staff R&D Engineer
> Kitware, Inc.
>
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From kit.chambers.kc at gmail.com  Thu Dec  6 08:38:29 2018
From: kit.chambers.kc at gmail.com (Kit Chambers)
Date: Thu, 6 Dec 2018 13:38:29 +0000
Subject: [vtkusers] Issue with python wrapping in derived libraries
Message-ID: <51B5DD2E-9E32-42C9-AA97-82D9A2BA34A5@googlemail.com>


I am having and issue where by libraries built on top of VTK and wrapped using the vtkPython wrapping are not being imported properly. 

Essentially I have 2 projects:

project1/ - Contains vtkmodule1 and extends vtkImageData to define the object vtkCube. The object vtkCube1 implements a method CustomMethod1

project2/ - Contains vtkmodule2 and extends vtkCube1 to define the object vtkCube2. The object vtkCube2 then implements a method CustomMethod2 

Compiling and wrapping the libraries works fine except for when you try to access CustomMethod1 from the python wrapped vtkCube2. Essentially the vtkCube2 object misses out all the members of vtkCube1.


To help show/explain I created a git repo which replicates the issue here 

	https://github.com/batearedcollie/test-vtkwrap-shared <https://github.com/batearedcollie/test-vtkwrap-shared>

There is also a docker image which replicates the issue here  

	https://hub.docker.com/r/batearedcollie/vtkwrappingissue/ <https://hub.docker.com/r/batearedcollie/vtkwrappingissue/>


Any ideas or help would be greatly appreciated

Thanks


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From rastor.ragereaver at gmail.com  Thu Dec  6 13:12:31 2018
From: rastor.ragereaver at gmail.com (=?UTF-8?Q?Rados=C5=82aw_Furmaniak?=)
Date: Thu, 6 Dec 2018 19:12:31 +0100
Subject: [vtkusers] Exporting RGB Polydata to .OBJ or .PLY
Message-ID: <CAKO8d6NPwamN31OXNbUbae46=i2rYeWJi98i0g=qj4b2ZSxV_Q@mail.gmail.com>

Hello,
I have set up PolyData and added 4 component scalar array to it. When I
create PolyDataMapper, set scalar visibility and add actor to the scene,
all colors are rendered properly.
However, I have a problem with exporting this scene or just the polydata to
the .OBJ (+mtl) file or to the .PLY. When I open it up in Blender, geometry
is exported correctly, however OBJ is created all white, and .PLY has a
single, grayish color (apart from the shadows of course), which I don't
think is even present in input PolyData.

I am trying to do it like this:

plyWriter = vtk.vtkPLYWriter()
plyWriter.SetInputData(polydata)
plyWriter.SetFileTypeToBinary()
plyWriter.SetDataByteOrderToLittleEndian()
plyWriter.SetArrayName("Scalars")
plyWriter.SetFileName("model.ply")
plyWriter.Write()

I have also tried setting up different color modes in plyWriter,
 but the results are always the same.

Scalar array is set up like this:

scalarArray = vtk.vtkDoubleArray()
scalarArray.SetNumberOfComponents(4)
scalarArray.SetName("Scalars")

polydata.GetPointData().AddArray(scalarArray)

polydata.GetPointData().SetActiveScalars("Scalars")

(I am omitting the part where I am actually setting elements of this array)

I have also tried using the OBJExporter:

writer = vtk.vtkOBJExporter()
writer.SetFilePrefix(output_prefix)
writer.SetInput(renWin)
writer.Write()

where renWin is rendering window with a single actor made from
polydata mentioned above.

I am using Python 3.6 and VTK 8.1.1.

Any help how to export geometry and colors, so they can be reused in other
programs?

Thanks in advance.
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From romain.leguay at gmail.com  Thu Dec  6 14:46:22 2018
From: romain.leguay at gmail.com (Romain LEGUAY)
Date: Thu, 6 Dec 2018 20:46:22 +0100
Subject: [vtkusers] vtkImageInteractorStyle and MouseWheelEvent
Message-ID: <10FE67DB-416D-4C59-A1F7-6E9F49F8BE87@gmail.com>

Hi everyone,

I try to use the mouse wheel on a vtkResliceImageViewer in a Qt window.

I try to add a callback to the vtkImageInteractorStyle like this:



QtVTKExample::QtVTKExample(QWidget *parent) : QWidget(parent)
{
	m_layout = new QVBoxLayout;

	m_window = vtkSmartPointer<vtkGenericOpenGLRenderWindow>::New();
	m_widget = new QVTKOpenGLWidget(this);
	m_widget->SetRenderWindow(m_window);

	m_image = vtkSmartPointer<vtkImageData>::New();

	m_mapper = vtkSmartPointer<vtkImageResliceMapper>::New();
	m_mapper->SetInputData(m_image);

	m_viewer = vtkSmartPointer<vtkResliceImageViewer>::New();
	m_viewer->SetRenderWindow(m_window);
	m_viewer->SetupInteractor(m_window->GetInteractor());
	m_viewer->GetImageActor()->SetMapper(m_mapper);

	addObservers();

	m_layout->addWidget(m_widget);
	setLayout(m_layout);
}


void WheelBackwardFunction (vtkObject*, long unsigned int, void*, void*)
{
	std::cout << "wheel backward" << std::endl;
}

void WheelForwardFunction (vtkObject*, long unsigned int, void*, void*)
{
	std::cout << "wheel forward" << std::endl;
}

void QtVTKExample::addObservers()
{
	m_wheelForward = vtkSmartPointer<vtkCallbackCommand>::New();
	m_wheelBackward = vtkSmartPointer<vtkCallbackCommand>::New();
	m_wheelForward->SetCallback(WheelForwardFunction);
	m_wheelBackward->SetCallback(WheelBackwardFunction);
	m_viewer->GetInteractorStyle()->AddObserver(vtkCommand::MouseWheelForwardEvent, m_wheelForward);
	m_viewer->GetInteractorStyle()->AddObserver(vtkCommand::MouseWheelBackwardEvent, m_wheelBackward);
}


The window opens, with no warnings but the callback function are never called.

What did I do wrong?

Thank you,

Romain

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From ken.martin at kitware.com  Fri Dec  7 11:22:53 2018
From: ken.martin at kitware.com (Ken Martin)
Date: Fri, 7 Dec 2018 11:22:53 -0500
Subject: [vtkusers] Strange Visualization Results With Transparency on
 Polydata
In-Reply-To: <SN4PR0501MB3741FA34738D5ADFAD96F00ADCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
References: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>
 <SN4PR0501MB3741BCA681F5CBFC9A0BB9A3DCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
 <CANwS1=EqhY9_YnK+JWmGbWx4uN36mBRaUv1g6WW++izTQwbBbw@mail.gmail.com>
 <CANXz0SYabiw3DPgsY3HhmsL3Z1r8b-r2bUSxv8r5ZMiZmUDwSw@mail.gmail.com>
 <SN4PR0501MB3741FA34738D5ADFAD96F00ADCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
Message-ID: <CANXz0SZkMzrTdnb26WTPwW45FFZH71SmA+Ec+jhdRYxZSRDu-w@mail.gmail.com>

The coincident topology support in vtkMapper can be used for this. It
allows you to specify on a per mapper basis adjustments to the depth of
objects.

On Tue, Dec 4, 2018 at 5:01 PM Fahlgren, Eric <
eric.fahlgren at smith-nephew.com> wrote:

> That?s excellent news.  This is a very difficult problem, which I?ve
> watched evolve over many years and it?s great to see the payoff from all
> those brain cycles that have been applied to it.
>
>
>
> Is there any means to manually force render depth for actors/parts?  We
> have cases where we draw a couple of overlapped X-ray images, transparent
> so you can see the overlap to align them.  They are overlaid with lines
> (for example from femur head to trochlear groove), all in the same plane
> with the images.  Sometimes it looks fine, sometimes the line is hidden
> until you rotate the image by 1e-6 degrees or zoom by a factor of almost
> nothing, at which point the lines jump in front; zoom a little more and
> they go behind.  Draw order is correct, image first, then lines ?on top?,
> but when the image is oriented exactly in the plane of the view, then this
> issue pops up. (Our hack-around is to put the lines some small increment in
> front of the plane of the images.)  As I recall, we tried about five years
> ago to stick something into vtkRenderer to do this as a proof of concept,
> but never got anywhere near production with it.
>
>
>
> *From:* Ken Martin <ken.martin at kitware.com>
> *Sent:* Tuesday, December 4, 2018 1:24 PM
> *To:* David Gobbi <david.gobbi at gmail.com>
> *Cc:* Andrea Borsic <aborsic at ne-scientific.com>; Fahlgren, Eric <
> eric.fahlgren at smith-nephew.com>; vtkusers at public.kitware.com
> *Subject:* Re: [vtkusers] Strange Visualization Results With Transparency
> on Polydata
>
>
>
> In newer versions of VTK (8.2 maybe) this issue should not be as
> noticeable as we changed how we handle transparent rendering to yield
> better (but still not perfect) results.
>
>
>
> On Tue, Dec 4, 2018 at 4:00 PM David Gobbi <david.gobbi at gmail.com> wrote:
>
> What Eric says is true, depth peeling or Z-sorting is needed for
> transparent polydata.
>
>
>
> Here's a long-ish explanation of why the red sphere is rendering wrong:
> since the mapper uses a lookup table that contains alpha values below 1.0,
> VTK decides to use the translucent rendering pass instead of the opaque
> rendering pass.  In the translucent rendering pass, VTK doesn't write to
> the z-buffer, so unless depth peeling is enabled (or polys are pre-sorted
> back-to-front) you'll end up with bad results.
>
>
>
>   David
>
>
>
> On Tue, Dec 4, 2018 at 1:47 PM Fahlgren, Eric <
> eric.fahlgren at smith-nephew.com> wrote:
>
> Hi Andrea,
>
>
>
> Z-sorting of transparent polygons is always a problem.  You can cure it by
> turning on depth peeling, but it comes at a cost (for our models it makes
> renders take almost twice as long).
>
>
>
> # create a rendering window and renderer
>
> ren = vtk.vtkRenderer()
>
> *ren.SetUseDepthPeeling(True)*
>
>
>
> Eric
>
>
>
> *From:* vtkusers <vtkusers-bounces at public.kitware.com> *On Behalf Of *
> aborsic at ne-scientific.com
> *Sent:* Tuesday, December 4, 2018 11:20 AM
> *To:* vtkusers at public.kitware.com
> *Subject:* [vtkusers] Strange Visualization Results With Transparency on
> Polydata
>
>
>
> Dear All,
>
>
>
> I am experiencing some strange visualization results in VTK 8.1.0 on
> polydata using a LUT with some transparency for some entries and opacity
> for others.
>
>
>
> I am attaching a Python example to reproduce the problem. The code creates
> two polydata spheres which are spatially separated. An array with a uniform
> values of 1 is associated to cell data for the first sphere, and an array
> with values of 2 to the second sphere. The two spheres are appended
> together for convenience with a polydata append filter.
>
>
>
> A LUT is created with two entries, solid red RGBA = (1,0,0,1) and
> transparent green RGBA = (0,1,0,0.2), the scalar range is set to (1,2)
> mapping the cells of the first sphere to the first LUT entry and the cells
> of the second sphere to the second LUT entry.
>
>
>
> As shown by the attached rendering the red sphere also appears as
> semi-transparent, and in a wired way, if rotated some portions of the
> sphere seem more transparent, and others less. Setting the second LUT entry
> to solid green RGBA = (0,1,0,1) makes both spheres opaque ? this is
> expected, but why does modifying the alpha channel of the second LUT entry
> affects also the appearance of the first sphere?
>
>
>
> I am experiencing this on two different Windows 10 computers equipped with
> modern NVIDIA GPUs, and on a 2017 iMac 27 running Mojave, all these
> computers have VTK 8.1.0.
>
>
>
> Any comment / advice is welcome,
>
>
>
> Thanks, Best Regards,
>
>
>
> Andrea
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
>
>
> --
>
> Ken Martin PhD
>
> Distinguished Engineer
> Kitware Inc.
>
> 101 East Weaver Street
> Carrboro, North Carolina
> 27510 USA
>
> This communication, including all attachments, contains confidential and
> legally privileged information, and it is intended only for the use of the
> addressee.  Access to this email by anyone else is unauthorized. If you are
> not the intended recipient, any disclosure, copying, distribution or any
> action taken in reliance on it is prohibited and may be unlawful. If you
> received this communication in error please notify us immediately and
> destroy the original message.  Thank you.
>


-- 
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
101 East Weaver Street
Carrboro, North Carolina
27510 USA

This communication, including all attachments, contains confidential and
legally privileged information, and it is intended only for the use of the
addressee.  Access to this email by anyone else is unauthorized. If you are
not the intended recipient, any disclosure, copying, distribution or any
action taken in reliance on it is prohibited and may be unlawful. If you
received this communication in error please notify us immediately and
destroy the original message.  Thank you.
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From eric.fahlgren at smith-nephew.com  Fri Dec  7 11:52:42 2018
From: eric.fahlgren at smith-nephew.com (Fahlgren, Eric)
Date: Fri, 7 Dec 2018 16:52:42 +0000
Subject: [vtkusers] Strange Visualization Results With Transparency on
 Polydata
In-Reply-To: <CANXz0SZkMzrTdnb26WTPwW45FFZH71SmA+Ec+jhdRYxZSRDu-w@mail.gmail.com>
References: <002401d48c06$683456e0$389d04a0$@ne-scientific.com>
 <SN4PR0501MB3741BCA681F5CBFC9A0BB9A3DCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
 <CANwS1=EqhY9_YnK+JWmGbWx4uN36mBRaUv1g6WW++izTQwbBbw@mail.gmail.com>
 <CANXz0SYabiw3DPgsY3HhmsL3Z1r8b-r2bUSxv8r5ZMiZmUDwSw@mail.gmail.com>
 <SN4PR0501MB3741FA34738D5ADFAD96F00ADCAF0@SN4PR0501MB3741.namprd05.prod.outlook.com>
 <CANXz0SZkMzrTdnb26WTPwW45FFZH71SmA+Ec+jhdRYxZSRDu-w@mail.gmail.com>
Message-ID: <DM5PR0501MB3733B854D3ADBEFAE8C3CD2DDCAA0@DM5PR0501MB3733.namprd05.prod.outlook.com>

Aha!  I had never looked at that before, thanks Ken.

From: Ken Martin <ken.martin at kitware.com>
Sent: Friday, December 7, 2018 8:23 AM
To: Fahlgren, Eric <eric.fahlgren at smith-nephew.com>
Cc: David Gobbi <david.gobbi at gmail.com>; Andrea Borsic <aborsic at ne-scientific.com>; vtkusers at public.kitware.com
Subject: Re: [vtkusers] Strange Visualization Results With Transparency on Polydata

The coincident topology support in vtkMapper can be used for this. It allows you to specify on a per mapper basis adjustments to the depth of objects.

On Tue, Dec 4, 2018 at 5:01 PM Fahlgren, Eric <eric.fahlgren at smith-nephew.com<mailto:eric.fahlgren at smith-nephew.com>> wrote:
That?s excellent news.  This is a very difficult problem, which I?ve watched evolve over many years and it?s great to see the payoff from all those brain cycles that have been applied to it.

Is there any means to manually force render depth for actors/parts?  We have cases where we draw a couple of overlapped X-ray images, transparent so you can see the overlap to align them.  They are overlaid with lines (for example from femur head to trochlear groove), all in the same plane with the images.  Sometimes it looks fine, sometimes the line is hidden until you rotate the image by 1e-6 degrees or zoom by a factor of almost nothing, at which point the lines jump in front; zoom a little more and they go behind.  Draw order is correct, image first, then lines ?on top?, but when the image is oriented exactly in the plane of the view, then this issue pops up. (Our hack-around is to put the lines some small increment in front of the plane of the images.)  As I recall, we tried about five years ago to stick something into vtkRenderer to do this as a proof of concept, but never got anywhere near production with it.

From: Ken Martin <ken.martin at kitware.com<mailto:ken.martin at kitware.com>>
Sent: Tuesday, December 4, 2018 1:24 PM
To: David Gobbi <david.gobbi at gmail.com<mailto:david.gobbi at gmail.com>>
Cc: Andrea Borsic <aborsic at ne-scientific.com<mailto:aborsic at ne-scientific.com>>; Fahlgren, Eric <eric.fahlgren at smith-nephew.com<mailto:eric.fahlgren at smith-nephew.com>>; vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>
Subject: Re: [vtkusers] Strange Visualization Results With Transparency on Polydata

In newer versions of VTK (8.2 maybe) this issue should not be as noticeable as we changed how we handle transparent rendering to yield better (but still not perfect) results.

On Tue, Dec 4, 2018 at 4:00 PM David Gobbi <david.gobbi at gmail.com<mailto:david.gobbi at gmail.com>> wrote:
What Eric says is true, depth peeling or Z-sorting is needed for transparent polydata.

Here's a long-ish explanation of why the red sphere is rendering wrong: since the mapper uses a lookup table that contains alpha values below 1.0, VTK decides to use the translucent rendering pass instead of the opaque rendering pass.  In the translucent rendering pass, VTK doesn't write to the z-buffer, so unless depth peeling is enabled (or polys are pre-sorted back-to-front) you'll end up with bad results.

  David

On Tue, Dec 4, 2018 at 1:47 PM Fahlgren, Eric <eric.fahlgren at smith-nephew.com<mailto:eric.fahlgren at smith-nephew.com>> wrote:
Hi Andrea,

Z-sorting of transparent polygons is always a problem.  You can cure it by turning on depth peeling, but it comes at a cost (for our models it makes renders take almost twice as long).

# create a rendering window and renderer
ren = vtk.vtkRenderer()
ren.SetUseDepthPeeling(True)

Eric

From: vtkusers <vtkusers-bounces at public.kitware.com<mailto:vtkusers-bounces at public.kitware.com>> On Behalf Of aborsic at ne-scientific.com<mailto:aborsic at ne-scientific.com>
Sent: Tuesday, December 4, 2018 11:20 AM
To: vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>
Subject: [vtkusers] Strange Visualization Results With Transparency on Polydata

Dear All,

I am experiencing some strange visualization results in VTK 8.1.0 on polydata using a LUT with some transparency for some entries and opacity for others.

I am attaching a Python example to reproduce the problem. The code creates two polydata spheres which are spatially separated. An array with a uniform values of 1 is associated to cell data for the first sphere, and an array with values of 2 to the second sphere. The two spheres are appended together for convenience with a polydata append filter.

A LUT is created with two entries, solid red RGBA = (1,0,0,1) and transparent green RGBA = (0,1,0,0.2), the scalar range is set to (1,2) mapping the cells of the first sphere to the first LUT entry and the cells of the second sphere to the second LUT entry.

As shown by the attached rendering the red sphere also appears as semi-transparent, and in a wired way, if rotated some portions of the sphere seem more transparent, and others less. Setting the second LUT entry to solid green RGBA = (0,1,0,1) makes both spheres opaque ? this is expected, but why does modifying the alpha channel of the second LUT entry affects also the appearance of the first sphere?

I am experiencing this on two different Windows 10 computers equipped with modern NVIDIA GPUs, and on a 2017 iMac 27 running Mojave, all these computers have VTK 8.1.0.

Any comment / advice is welcome,

Thanks, Best Regards,

Andrea
_______________________________________________
Powered by www.kitware.com<http://www.kitware.com>

Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html

Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ

Search the list archives at: http://markmail.org/search/?q=vtkusers

Follow this link to subscribe/unsubscribe:
https://public.kitware.com/mailman/listinfo/vtkusers


--
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
101 East Weaver Street
Carrboro, North Carolina
27510 USA
This communication, including all attachments, contains confidential and legally privileged information, and it is intended only for the use of the addressee.  Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken in reliance on it is prohibited and may be unlawful. If you received this communication in error please notify us immediately and destroy the original message.  Thank you.


--
Ken Martin PhD
Distinguished Engineer
Kitware Inc.
101 East Weaver Street
Carrboro, North Carolina
27510 USA
This communication, including all attachments, contains confidential and legally privileged information, and it is intended only for the use of the addressee.  Access to this email by anyone else is unauthorized. If you are not the intended recipient, any disclosure, copying, distribution or any action taken in reliance on it is prohibited and may be unlawful. If you received this communication in error please notify us immediately and destroy the original message.  Thank you.
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From srbn.ghosh99 at gmail.com  Fri Dec  7 14:27:56 2018
From: srbn.ghosh99 at gmail.com (Shrabani Ghosh)
Date: Fri, 7 Dec 2018 12:27:56 -0700 (MST)
Subject: [vtkusers] How to delete an edge of a simplex mesh and create a new
 edge connection?
Message-ID: <1544210876871-0.post@n5.nabble.com>

HI All,

I have simplex mesh. I need to delete few edge links between two vertices
and need to create few edge links with two new vertices.

Please tell me how to do it.



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From rccm.kyoshimi at gmail.com  Sat Dec  8 05:00:50 2018
From: rccm.kyoshimi at gmail.com (kenichiro yoshimi)
Date: Sat, 8 Dec 2018 19:00:50 +0900
Subject: [vtkusers] Exporting RGB Polydata to .OBJ or .PLY
In-Reply-To: <CAKO8d6NPwamN31OXNbUbae46=i2rYeWJi98i0g=qj4b2ZSxV_Q@mail.gmail.com>
References: <CAKO8d6NPwamN31OXNbUbae46=i2rYeWJi98i0g=qj4b2ZSxV_Q@mail.gmail.com>
Message-ID: <CAHDyfPDM8DPkRS7cR3Kmvc+pQN-sKnQgLrVDqLcywHq09+9uKA@mail.gmail.com>

Hi,

You can use the vtkX3DExporter or vtkVRMLExporter to export VTK scene
and render the meshes and colors in blender.
https://www.vtk.org/gitweb?p=VTK.git;a=blob;f=IO/Export/Testing/Cxx/X3DTest.cxx
https://www.vtk.org/gitweb?p=VTK.git;a=blob;f=Rendering/Core/Testing/Python/cells.py

Regards
2018?12?7?(?) 3:13 Rados?aw Furmaniak <rastor.ragereaver at gmail.com>:
>
> Hello,
> I have set up PolyData and added 4 component scalar array to it. When I create PolyDataMapper, set scalar visibility and add actor to the scene, all colors are rendered properly.
> However, I have a problem with exporting this scene or just the polydata to the .OBJ (+mtl) file or to the .PLY. When I open it up in Blender, geometry is exported correctly, however OBJ is created all white, and .PLY has a single, grayish color (apart from the shadows of course), which I don't think is even present in input PolyData.
>
> I am trying to do it like this:
>
> plyWriter = vtk.vtkPLYWriter()
> plyWriter.SetInputData(polydata)
> plyWriter.SetFileTypeToBinary()
> plyWriter.SetDataByteOrderToLittleEndian()
> plyWriter.SetArrayName("Scalars")
> plyWriter.SetFileName("model.ply")
> plyWriter.Write()
>
> I have also tried setting up different color modes in plyWriter,
>  but the results are always the same.
>
> Scalar array is set up like this:
>
> scalarArray = vtk.vtkDoubleArray()
> scalarArray.SetNumberOfComponents(4)
> scalarArray.SetName("Scalars")
>
> polydata.GetPointData().AddArray(scalarArray)
>
> polydata.GetPointData().SetActiveScalars("Scalars")
>
> (I am omitting the part where I am actually setting elements of this array)
>
> I have also tried using the OBJExporter:
>
> writer = vtk.vtkOBJExporter()
> writer.SetFilePrefix(output_prefix)
> writer.SetInput(renWin)
> writer.Write()
>
> where renWin is rendering window with a single actor made from polydata mentioned above.
>
> I am using Python 3.6 and VTK 8.1.1.
>
> Any help how to export geometry and colors, so they can be reused in other programs?
>
> Thanks in advance.
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers

From lasso at queensu.ca  Sat Dec  8 11:37:27 2018
From: lasso at queensu.ca (Andras Lasso)
Date: Sat, 8 Dec 2018 16:37:27 +0000
Subject: [vtkusers] Exporting RGB Polydata to .OBJ or .PLY
In-Reply-To: <CAHDyfPDM8DPkRS7cR3Kmvc+pQN-sKnQgLrVDqLcywHq09+9uKA@mail.gmail.com>
References: <CAKO8d6NPwamN31OXNbUbae46=i2rYeWJi98i0g=qj4b2ZSxV_Q@mail.gmail.com>,
 <CAHDyfPDM8DPkRS7cR3Kmvc+pQN-sKnQgLrVDqLcywHq09+9uKA@mail.gmail.com>
Message-ID: <05211e96-60e9-4eff-9cfb-76f2bbcfa720@queensu.ca>

VTK's OBJ exporter can save solid color that is set in the actor's property and Blender can use that. Point scalar data could be exported to texture and probably Blender would use that, but that has not been implemented in VTK's OBJ exporter yet - contributions are welcome.

VTK's PLY writer can write RGB point scalars and some software, for example MeshLab can display the colored model correctly. However, Blender ignores this color information (at least it does not show up when you simply import the file; maybe there are plug-ins or some settings that would fix this). MeshLab may be able to export the colored model into a format that Blender can read.

Andras
________________________________
From: kenichiro yoshimi <rccm.kyoshimi at gmail.com>
Sent: Saturday, December 8, 2018 5:01 AM
To: rastor.ragereaver at gmail.com
Cc: vtkusers at public.kitware.com
Subject: Re: [vtkusers] Exporting RGB Polydata to .OBJ or .PLY

Hi,

You can use the vtkX3DExporter or vtkVRMLExporter to export VTK scene
and render the meshes and colors in blender.
https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.vtk.org%2Fgitweb%3Fp%3DVTK.git%3Ba%3Dblob%3Bf%3DIO%2FExport%2FTesting%2FCxx%2FX3DTest.cxx&amp;data=02%7C01%7Classo%40queensu.ca%7C1e8d31503e08484147da08d65cf4124d%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636798600696862805&amp;sdata=YaDsvSv7gjU5x3ilese0EXWFXXP%2FwfbM36CNGZFT2xM%3D&amp;reserved=0
https://na01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.vtk.org%2Fgitweb%3Fp%3DVTK.git%3Ba%3Dblob%3Bf%3DRendering%2FCore%2FTesting%2FPython%2Fcells.py&amp;data=02%7C01%7Classo%40queensu.ca%7C1e8d31503e08484147da08d65cf4124d%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636798600696862805&amp;sdata=s3zn9M6VhL8ISVFAq6pXutgYLsC1tT4%2BQGOcuB%2F7%2Bgo%3D&amp;reserved=0

Regards
2018?12?7?(?) 3:13 Rados?aw Furmaniak <rastor.ragereaver at gmail.com>:
>
> Hello,
> I have set up PolyData and added 4 component scalar array to it. When I create PolyDataMapper, set scalar visibility and add actor to the scene, all colors are rendered properly.
> However, I have a problem with exporting this scene or just the polydata to the .OBJ (+mtl) file or to the .PLY. When I open it up in Blender, geometry is exported correctly, however OBJ is created all white, and .PLY has a single, grayish color (apart from the shadows of course), which I don't think is even present in input PolyData.
>
> I am trying to do it like this:
>
> plyWriter = vtk.vtkPLYWriter()
> plyWriter.SetInputData(polydata)
> plyWriter.SetFileTypeToBinary()
> plyWriter.SetDataByteOrderToLittleEndian()
> plyWriter.SetArrayName("Scalars")
> plyWriter.SetFileName("model.ply")
> plyWriter.Write()
>
> I have also tried setting up different color modes in plyWriter,
>  but the results are always the same.
>
> Scalar array is set up like this:
>
> scalarArray = vtk.vtkDoubleArray()
> scalarArray.SetNumberOfComponents(4)
> scalarArray.SetName("Scalars")
>
> polydata.GetPointData().AddArray(scalarArray)
>
> polydata.GetPointData().SetActiveScalars("Scalars")
>
> (I am omitting the part where I am actually setting elements of this array)
>
> I have also tried using the OBJExporter:
>
> writer = vtk.vtkOBJExporter()
> writer.SetFilePrefix(output_prefix)
> writer.SetInput(renWin)
> writer.Write()
>
> where renWin is rendering window with a single actor made from polydata mentioned above.
>
> I am using Python 3.6 and VTK 8.1.1.
>
> Any help how to export geometry and colors, so they can be reused in other programs?
>
> Thanks in advance.
>
> _______________________________________________
> Powered by https://na01.safelinks.protection.outlook.com/?url=www.kitware.com&amp;data=02%7C01%7Classo%40queensu.ca%7C1e8d31503e08484147da08d65cf4124d%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636798600696862805&amp;sdata=PeaSVC7fX37vaEEQwDU9tjq%2FRKKkqqekeYXkr1xuvBA%3D&amp;reserved=0
>
> Visit other Kitware open-source projects at https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.kitware.com%2Fopensource%2Fopensource.html&amp;data=02%7C01%7Classo%40queensu.ca%7C1e8d31503e08484147da08d65cf4124d%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636798600696862805&amp;sdata=3RrDlN1d5fM25xQ9EsSRczIGHKV3dBkig4LeYNLuX%2B0%3D&amp;reserved=0
>
> Please keep messages on-topic and check the VTK FAQ at: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.vtk.org%2FWiki%2FVTK_FAQ&amp;data=02%7C01%7Classo%40queensu.ca%7C1e8d31503e08484147da08d65cf4124d%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636798600696862805&amp;sdata=Pmqn82Jp7%2FGZuwY6IZ5ipdL0qa8vlnHpqEar9fDkUjk%3D&amp;reserved=0
>
> Search the list archives at: https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fmarkmail.org%2Fsearch%2F%3Fq%3Dvtkusers&amp;data=02%7C01%7Classo%40queensu.ca%7C1e8d31503e08484147da08d65cf4124d%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636798600696862805&amp;sdata=B6DlpR1Z4bStYhDE4jPKthNVzS7f%2BWIkcl2roYr3Z9E%3D&amp;reserved=0
>
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From j.robinson at kepler-systems.com  Sat Dec  8 11:43:48 2018
From: j.robinson at kepler-systems.com (JimRobinson)
Date: Sat, 8 Dec 2018 09:43:48 -0700 (MST)
Subject: [vtkusers] Probing a vtkUnstructuredGrid with a vtkDelaunay2D
 surface
Message-ID: <1544287428850-0.post@n5.nabble.com>


Dear All,

I am trying to develop a utility in my data visualization software whereby I
can take a vtkUnstructuredGrid with scalar and vector values at the points
and find the interpolated value of the scalar or vector field on the surface
(essentially at the points) defined by a vtkDelaunay2D object. 

This is easy to do if the probing surface is a plane (so therefore defined
by a function) or, I imagine, if the probing surface is defined by any
function. 

I have managed to do it using a vtkProbeFilter, whereby I set the probing
surface to be the vtkDelaunay2D (below - _TIN) and the source data as the
vtkUnstructuredGrid (_USGrid). The following nearly gets there:

            vtkProbeFilter _BathymetryProbeFilter = new vtkProbeFilter();
            _BathymetryProbeFilter.SetInputData(_TIN.GetOutput());
            _BathymetryProbeFilter.SetSourceData(_USGrid);

However, if the _TIN protrudes from the _USGrid, then the algorithms can't
interpolate a field value at the points of the _TIN that are outside of the
_USGrid, and so it sets them to zero. This means that the resulting colour
map is wrong.

Here is a randomly generated vtkUnstructuredGrid with the field values
simply being the altitude (z value) at each point.


<http://vtk.1045678.n5.nabble.com/file/t342484/vtkIMage1.jpg> 

And we see the vtkDelaunay2D surface shows good results (displaying the
correct altitudes) when that surface is entirely inside the
vtkUnstructuredGrid volume. 

<http://vtk.1045678.n5.nabble.com/file/t342484/vtkIMage2.jpg> 

However, when the surface protrudes from the top of the vtkUnstructuredGrid
volume, is where we get the incorrect interpolation:

<http://vtk.1045678.n5.nabble.com/file/t342484/vtkIMage3.jpg> 

What I need is the vtkDelaunay2D to be clipped when it protrudes from the
vtkUnstructuredGrid.

Any thoughts on how this might be achieved would be much appreciated.

Regards,

Jim






--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From paulo.r.m.carvalho at gmail.com  Mon Dec 10 04:50:06 2018
From: paulo.r.m.carvalho at gmail.com (Paulo Carvalho)
Date: Mon, 10 Dec 2018 07:50:06 -0200
Subject: [vtkusers] Issue compiling VTK 8.1.2 - MinGW64 - Windows 7
In-Reply-To: <1541787121742-0.post@n5.nabble.com>
References: <1541787121742-0.post@n5.nabble.com>
Message-ID: <CA+xrYwirW5JJ0ZoNXN=x+MGgJMzMe8a0vVm5ncSUdS+FUuoqiA@mail.gmail.com>

Greetings, all,

    Since I got no answer, I had to do come up with a workaround.  I had to
patch the <source
root>/Rendering/OpenGL2/vtkWin32RenderWindowInteractor.cxx file (around
line 70).  The structures TOUCHINPUT and HTOUCHINPUT are incorrectly
redefined there (they're defined in winuser.h).  Since this is an error in
VTK sources, maybe the developers could patch it.
    Compiling VTK 8.1.2 in Windows 7 64 with MinGW 64.

regards,

Paulo

Em sex, 9 de nov de 2018 ?s 16:12, Paulo Carvalho <
paulo.r.m.carvalho at gmail.com> escreveu:

> Greetings all.  I'm trying to build VTK and I'm getting the following
> error:
>
> [ 62%] Building CXX object
>
> Rendering/OpenGL2/CMakeFiles/vtkRenderingOpenGL2.dir/vtkWin32RenderWindowInteractor.cxx.obj
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:72:3:
> error: conflicting declaration 'typedef struct _TOUCHINPUT TOUCHINPUT'
>  } TOUCHINPUT, *PTOUCHINPUT;
>    ^~~~~~~~~~
> In file included from
>
> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/windows.h:72,
>                  from
> C:/Users/ur5m/Desktop/VTK64/VTK-8.1.2/Common/Core/vtkWindows.h:58,
>                  from
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32OpenGLRenderWindow.h:31,
>                  from
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:26:
>
> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/winuser.h:2694:5:
> note: previous declaration as 'typedef struct tagTOUCHINPUT TOUCHINPUT'
>    } TOUCHINPUT,*PTOUCHINPUT;
>      ^~~~~~~~~~
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:72:16:
> error: conflicting declaration 'typedef struct _TOUCHINPUT* PTOUCHINPUT'
>  } TOUCHINPUT, *PTOUCHINPUT;
>                 ^~~~~~~~~~~
> In file included from
>
> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/windows.h:72,
>                  from
> C:/Users/ur5m/Desktop/VTK64/VTK-8.1.2/Common/Core/vtkWindows.h:58,
>                  from
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32OpenGLRenderWindow.h:31,
>                  from
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:26:
>
> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/winuser.h:2694:17:
> note: previous declaration as 'typedef struct tagTOUCHINPUT* PTOUCHINPUT'
>    } TOUCHINPUT,*PTOUCHINPUT;
>                  ^~~~~~~~~~~
> In file included from
>
> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/minwindef.h:163,
>                  from
> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/windef.h:8,
>                  from
>
> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/windows.h:69,
>                  from
> C:/Users/ur5m/Desktop/VTK64/VTK-8.1.2/Common/Core/vtkWindows.h:58,
>                  from
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32OpenGLRenderWindow.h:31,
>                  from
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:26:
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:73:16:
> error: redefinition of 'struct HTOUCHINPUT__'
>  DECLARE_HANDLE(HTOUCHINPUT);
>                 ^~~~~~~~~~~
>
> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/winuser.h:2681:3:
> note: previous definition of 'struct HTOUCHINPUT__'
>    DECLARE_HANDLE (HTOUCHINPUT);
>    ^~~~~~~~~~~~~~
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:
> In member function 'virtual int
> vtkWin32RenderWindowInteractor::OnTouch(HWND, UINT, UINT)':
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:764:27:
> warning: cast to pointer from integer of different size
> [-Wint-to-pointer-cast]
>      if (GTII((HTOUCHINPUT)lParam, cInputs, pInputs, sizeof(TOUCHINPUT)))
>                            ^~~~~~
>
> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:819:23:
> warning: cast to pointer from integer of different size
> [-Wint-to-pointer-cast]
>      CTIH((HTOUCHINPUT)lParam);
>                        ^~~~~~
> mingw32-make[2]: ***
> [Rendering\OpenGL2\CMakeFiles\vtkRenderingOpenGL2.dir\build.make:1733:
>
> Rendering/OpenGL2/CMakeFiles/vtkRenderingOpenGL2.dir/vtkWin32RenderWindowInteractor.cxx.obj]
> Error 1
> mingw32-make[1]: *** [CMakeFiles\Makefile2:2510:
> Rendering/OpenGL2/CMakeFiles/vtkRenderingOpenGL2.dir/all] Error 2
> mingw32-make: *** [Makefile:129: all] Error 2
>
> Any help will be much appreciated.  Thanks.
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From zozonmr at gmail.com  Mon Dec 10 05:00:57 2018
From: zozonmr at gmail.com (Zoltan Takacs)
Date: Mon, 10 Dec 2018 11:00:57 +0100
Subject: [vtkusers] Compiling VTK-8.1.2 on MacBook Pro high Sierra
Message-ID: <8F892324-ED48-4916-A46A-EB0B795E8DF2@gmail.com>

Hi,

I was unable to compile VTK-8.1.2 on a MacBook Pro 2017 high Sierra. 
CMake Error at >/usr/local/lib/cmake/Qt5Core/Qt5CoreConfig.cmake:15 (message): The imported target "Qt5::Core" references the file

"/usr/local/.//mkspecs/macx-clang"
but this file does not exist. Possible reasons include:

The file was deleted, renamed, or moved to another location.
An install or uninstall procedure did not complete successfully.
The installation package was faulty and contained

"/usr/local/lib/cmake/Qt5Core/Qt5CoreConfigExtras.cmake"
but not all the files it references.
Call Stack (most recent call first)

I have added the qt5 bin folder in the opt folder to the PATH but still getting the error. 

How can this error be resolved? Is there a solution?


Thanks
Z
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From kit.chambers.kc at gmail.com  Mon Dec 10 05:24:09 2018
From: kit.chambers.kc at gmail.com (Kit Chambers)
Date: Mon, 10 Dec 2018 10:24:09 +0000
Subject: [vtkusers] Issue with python wrapping in derived libraries
In-Reply-To: <mailman.11.1544115605.22962.vtkusers@public.kitware.com>
References: <mailman.11.1544115605.22962.vtkusers@public.kitware.com>
Message-ID: <85A714FF-5F2A-4869-85CD-0CB6B8DAB5BD@googlemail.com>

Dear VTK?ers

After some more investigation I think I have solved this issue. I thought i would mention this here in the hope this benefits other in the future. 

Essentially the procedure I have for building a python module was 

1- Use vtk_python_wrap3 to generate source files
2- Compile the source files into a static library called MODULENAMPythonD.a
3- Create the Python module (MODULENAME.so) itself by compiling the MODULENAMInit.cxx and linking against MODULENAMPythonD.a

The solution was to change step 2 so that a shared library MODULENAMPythonD.so was built instead. Note - I suspect this solution is system dependent and has only been tested on Ubuntu so far.


> 
> 
> ------------------------------
> 
> Message: 6
> Date: Thu, 6 Dec 2018 13:38:29 +0000
> From: Kit Chambers <kit.chambers.kc at gmail.com>
> To: VTK Users <vtkusers at vtk.org>
> Subject: [vtkusers] Issue with python wrapping in derived libraries
> Message-ID: <51B5DD2E-9E32-42C9-AA97-82D9A2BA34A5 at googlemail.com>
> Content-Type: text/plain; charset="us-ascii"
> 
> 
> I am having and issue where by libraries built on top of VTK and wrapped using the vtkPython wrapping are not being imported properly. 
> 
> Essentially I have 2 projects:
> 
> project1/ - Contains vtkmodule1 and extends vtkImageData to define the object vtkCube. The object vtkCube1 implements a method CustomMethod1
> 
> project2/ - Contains vtkmodule2 and extends vtkCube1 to define the object vtkCube2. The object vtkCube2 then implements a method CustomMethod2 
> 
> Compiling and wrapping the libraries works fine except for when you try to access CustomMethod1 from the python wrapped vtkCube2. Essentially the vtkCube2 object misses out all the members of vtkCube1.
> 
> 
> To help show/explain I created a git repo which replicates the issue here 
> 
> 	https://github.com/batearedcollie/test-vtkwrap-shared <https://github.com/batearedcollie/test-vtkwrap-shared>
> 
> There is also a docker image which replicates the issue here  
> 
> 	https://hub.docker.com/r/batearedcollie/vtkwrappingissue/ <https://hub.docker.com/r/batearedcollie/vtkwrappingissue/>
> 
> 
> Any ideas or help would be greatly appreciated
> 
> Thanks


From dave.demarle at kitware.com  Mon Dec 10 11:09:14 2018
From: dave.demarle at kitware.com (David E DeMarle)
Date: Mon, 10 Dec 2018 11:09:14 -0500
Subject: [vtkusers] Issue compiling VTK 8.1.2 - MinGW64 - Windows 7
In-Reply-To: <CA+xrYwirW5JJ0ZoNXN=x+MGgJMzMe8a0vVm5ncSUdS+FUuoqiA@mail.gmail.com>
References: <1541787121742-0.post@n5.nabble.com>
 <CA+xrYwirW5JJ0ZoNXN=x+MGgJMzMe8a0vVm5ncSUdS+FUuoqiA@mail.gmail.com>
Message-ID: <CANjZAi98BT6ac1bfN8dUJzbTcEc0tsXJVw_=L98YZiyp0_F_XA@mail.gmail.com>

Paulo would you mind submitting a merge request? That makes it
straightforward to run our regression tests on the change, which is a
requirement before it goes into master.

Instructions on how to do so are here:
https://gitlab.kitware.com/vtk/vtk/blob/master/CONTRIBUTING.md

thanks!

David E DeMarle
Kitware, Inc.
Principal Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Mon, Dec 10, 2018 at 4:50 AM Paulo Carvalho <paulo.r.m.carvalho at gmail.com>
wrote:

> Greetings, all,
>
>     Since I got no answer, I had to do come up with a workaround.  I had
> to patch the <source
> root>/Rendering/OpenGL2/vtkWin32RenderWindowInteractor.cxx file (around
> line 70).  The structures TOUCHINPUT and HTOUCHINPUT are incorrectly
> redefined there (they're defined in winuser.h).  Since this is an error in
> VTK sources, maybe the developers could patch it.
>     Compiling VTK 8.1.2 in Windows 7 64 with MinGW 64.
>
> regards,
>
> Paulo
>
> Em sex, 9 de nov de 2018 ?s 16:12, Paulo Carvalho <
> paulo.r.m.carvalho at gmail.com> escreveu:
>
>> Greetings all.  I'm trying to build VTK and I'm getting the following
>> error:
>>
>> [ 62%] Building CXX object
>>
>> Rendering/OpenGL2/CMakeFiles/vtkRenderingOpenGL2.dir/vtkWin32RenderWindowInteractor.cxx.obj
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:72:3:
>> error: conflicting declaration 'typedef struct _TOUCHINPUT TOUCHINPUT'
>>  } TOUCHINPUT, *PTOUCHINPUT;
>>    ^~~~~~~~~~
>> In file included from
>>
>> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/windows.h:72,
>>                  from
>> C:/Users/ur5m/Desktop/VTK64/VTK-8.1.2/Common/Core/vtkWindows.h:58,
>>                  from
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32OpenGLRenderWindow.h:31,
>>                  from
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:26:
>>
>> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/winuser.h:2694:5:
>> note: previous declaration as 'typedef struct tagTOUCHINPUT TOUCHINPUT'
>>    } TOUCHINPUT,*PTOUCHINPUT;
>>      ^~~~~~~~~~
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:72:16:
>> error: conflicting declaration 'typedef struct _TOUCHINPUT* PTOUCHINPUT'
>>  } TOUCHINPUT, *PTOUCHINPUT;
>>                 ^~~~~~~~~~~
>> In file included from
>>
>> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/windows.h:72,
>>                  from
>> C:/Users/ur5m/Desktop/VTK64/VTK-8.1.2/Common/Core/vtkWindows.h:58,
>>                  from
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32OpenGLRenderWindow.h:31,
>>                  from
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:26:
>>
>> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/winuser.h:2694:17:
>> note: previous declaration as 'typedef struct tagTOUCHINPUT* PTOUCHINPUT'
>>    } TOUCHINPUT,*PTOUCHINPUT;
>>                  ^~~~~~~~~~~
>> In file included from
>>
>> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/minwindef.h:163,
>>                  from
>>
>> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/windef.h:8,
>>                  from
>>
>> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/windows.h:69,
>>                  from
>> C:/Users/ur5m/Desktop/VTK64/VTK-8.1.2/Common/Core/vtkWindows.h:58,
>>                  from
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32OpenGLRenderWindow.h:31,
>>                  from
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:26:
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:73:16:
>> error: redefinition of 'struct HTOUCHINPUT__'
>>  DECLARE_HANDLE(HTOUCHINPUT);
>>                 ^~~~~~~~~~~
>>
>> C:/Users/ur5m/Desktop/msys64/mingw64/x86_64-w64-mingw32/include/winuser.h:2681:3:
>> note: previous definition of 'struct HTOUCHINPUT__'
>>    DECLARE_HANDLE (HTOUCHINPUT);
>>    ^~~~~~~~~~~~~~
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:
>> In member function 'virtual int
>> vtkWin32RenderWindowInteractor::OnTouch(HWND, UINT, UINT)':
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:764:27:
>> warning: cast to pointer from integer of different size
>> [-Wint-to-pointer-cast]
>>      if (GTII((HTOUCHINPUT)lParam, cInputs, pInputs, sizeof(TOUCHINPUT)))
>>                            ^~~~~~
>>
>> C:\Users\ur5m\Desktop\VTK64\VTK-8.1.2\Rendering\OpenGL2\vtkWin32RenderWindowInteractor.cxx:819:23:
>> warning: cast to pointer from integer of different size
>> [-Wint-to-pointer-cast]
>>      CTIH((HTOUCHINPUT)lParam);
>>                        ^~~~~~
>> mingw32-make[2]: ***
>> [Rendering\OpenGL2\CMakeFiles\vtkRenderingOpenGL2.dir\build.make:1733:
>>
>> Rendering/OpenGL2/CMakeFiles/vtkRenderingOpenGL2.dir/vtkWin32RenderWindowInteractor.cxx.obj]
>> Error 1
>> mingw32-make[1]: *** [CMakeFiles\Makefile2:2510:
>> Rendering/OpenGL2/CMakeFiles/vtkRenderingOpenGL2.dir/all] Error 2
>> mingw32-make: *** [Makefile:129: all] Error 2
>>
>> Any help will be much appreciated.  Thanks.
>>
>>
>>
>> --
>> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>
>> Follow this link to subscribe/unsubscribe:
>> https://public.kitware.com/mailman/listinfo/vtkusers
>>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From masterwangzx at gmail.com  Tue Dec 11 03:52:43 2018
From: masterwangzx at gmail.com (Franks)
Date: Tue, 11 Dec 2018 01:52:43 -0700 (MST)
Subject: [vtkusers] How to generate the curved line by two points and vectors
Message-ID: <1544518363269-0.post@n5.nabble.com>

Hi, list

I want to generate a curved line by VTK. Now I have the coordinates(xyz) of
two points. One is the start point and the other one is the end point. The
tangent vectors on two points are also known. 

Firstly, I use the vtkArcSource to generate the arc line. But sometimes the
four elements can not just right define a circle.

Now, I have no idea about this question.  I am looking for your help.

Best regards,
Frank




--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From romain.leguay at gmail.com  Tue Dec 11 08:12:15 2018
From: romain.leguay at gmail.com (Romain LEGUAY)
Date: Tue, 11 Dec 2018 14:12:15 +0100
Subject: [vtkusers] Yet another VTK, DICOM and Orientation problem
Message-ID: <CAE8ee6n7Ccm6v2zUCA5Nf4FnCsKJbD_nyRZrnr7i6NRe2iCe0A@mail.gmail.com>

Hello everyone,

I'm trying to create a viewer of dicom with anatomical views (axial,
sagittal and coronal) from a radiologist point of view.

As starting point, I use the example provided in vtkDICOM module :
testDicomDisplay
<https://github.com/dgobbi/vtk-dicom/blob/master/Examples/TestDICOMDisplay.cxx>
.
It uses vtkDICOMReader with SetMemoryRowOrderToFileNative activated.

When I try to display an axial CT scan, I don't obtain expected orientation
as you can see in pic1: the sagittal view is in Posterior -> Anterior
direction.
[image: pic1.png]

When I try to display a sagittal CT scan, I have different orientations:
[image: pic2.png]

To fix this orientation problem, I tried to create some transformation
matrices that converts
Patient Coordinates (DICOM) to World Coordinate (VTK coordinates).

To do this, I follow those steps:
* get the patient matrix (Pm) using the method
vtkDICOMReader::GetPatientMatrix (if I understand correctly, this matrix is
in DICOM space)
* create the rotation (Rm) from DICOM space to VTK space (rotation on VTK
X-axis around the origin point):
1 0 0 0
0 -1 0 0
0 0 -1 0
0 0 0 1
* Multiply Pm by Rm to obtain the matrix PRm to go from Patient Coordinates
to VTK Coordinates.
* Use the Matrix PRm with a point in IJK coordinates (voxel coordinates)
multiplied by the spacing.

I know I made a mistake because I don't have the result expected but I
don't know what I did wrong...

Can someone provide me some tips please?

Thank you,

Romain
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From aron.helser at kitware.com  Tue Dec 11 09:05:10 2018
From: aron.helser at kitware.com (Aron Helser)
Date: Tue, 11 Dec 2018 09:05:10 -0500
Subject: [vtkusers] How to generate the curved line by two points and
 vectors
In-Reply-To: <1544518363269-0.post@n5.nabble.com>
References: <1544518363269-0.post@n5.nabble.com>
Message-ID: <CAF2skS64OJm1jGxDEYCQfjRz1mPmS4-d8s3wx0S598RZbB+ELQ@mail.gmail.com>

Hi Frank,
I think you want a spline?
https://lorensen.github.io/VTKExamples/site/Cxx/PolyData/ParametricSpline/
HTH,
Aron

On Tue, Dec 11, 2018 at 3:52 AM Franks <masterwangzx at gmail.com> wrote:

> Hi, list
>
> I want to generate a curved line by VTK. Now I have the coordinates(xyz) of
> two points. One is the start point and the other one is the end point. The
> tangent vectors on two points are also known.
>
> Firstly, I use the vtkArcSource to generate the arc line. But sometimes the
> four elements can not just right define a circle.
>
> Now, I have no idea about this question.  I am looking for your help.
>
> Best regards,
> Frank
>
>
>
>
> --
> Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From msmerps at gmail.com  Tue Dec 11 09:43:09 2018
From: msmerps at gmail.com (The Merper)
Date: Tue, 11 Dec 2018 09:43:09 -0500
Subject: [vtkusers] VTK compatible LCD shutter glasses?
Message-ID: <CALbMNixdaTJK1vKB-b7kmbnp7TCGYekrYVVjfqpqw_U3DUd1kA@mail.gmail.com>

Hi VTKers,
   I want to buy a pair of liquid crystal display (LCD) shutter glasses to
use with VTK, but there don't seem to be many options available and it is
not clear to me what glasses are compatible with VTK. Can anyone recommend
a pair to get?
Alternatively, does anyone know if NVIDIA's 3D vision glasses (version 1 or
2) will work with VTK?

https://www.nvidia.com/object/3d-vision-glasses.html

thank you for your help,
    -Merps
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From sfaisal.ali91 at gmail.com  Tue Dec 11 10:18:47 2018
From: sfaisal.ali91 at gmail.com (sfaisalali91)
Date: Tue, 11 Dec 2018 08:18:47 -0700 (MST)
Subject: [vtkusers] vtkBillboardTextActor3D - attach text while reslicing in
 viewer
Message-ID: <1544541527024-0.post@n5.nabble.com>

Please can anyone help me with Text actor representation, I want to attach
the actor to image as that of point placer in image viewer. The closest i
got was by implementing vtkCaptionActor2D in which the leader lines sync
perfectly with image slicing but the text actor always remain on the top
render layer. I tried many approaches to attach the text actor to image, but
all in vain. 


<http://vtk.1045678.n5.nabble.com/file/t340043/vtk_nabble.jpg> 

your suggestions will be of great help. Thank you in advance.


Regards

Ali



--
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From kor1581 at gmail.com  Tue Dec 11 11:11:43 2018
From: kor1581 at gmail.com (ran)
Date: Tue, 11 Dec 2018 09:11:43 -0700 (MST)
Subject: [vtkusers] How to restrict vtkGenericOpenGLRenderWindow area to
 vtkResliceImageViewer render window
Message-ID: <1544544703564-0.post@n5.nabble.com>

As part of an application for displaying DICOM images in Qt widget
application in windows 10, I'm using vtkResliceImageViewer, custom
vtkInteractorStyleImage, vtkGenericOpenGLRenderWindow, QVTKOpenGLWidget for
displaying and fitting the images in Qt window. 
I also use vtkPlaneWidget, mriVtkLineWidget2 widgets inside the viewer.
It is working properly, but the problem is While Initially set the
coordinates for mriVtkLineWidget2 and vtkPlaneWidget objects it's correctly
displaying inside the DICOM image displayed area. But when moving the
widgets with mouse interactions, its rendering outside the
vtkResliceImageViewer render area. 
But I need to restrict the widgets render area to DICOM image displayed
area.

I expect the problem is the DICOM image area displaying inside the
vtkResliceImageViewer which DICOM images are displayed but
vtkGenericOpenGLRenderWindow render area is present beyond that, is this
right?
 How can I restrict widgets inside DICOM displaying area? 

My rendering code is something like this
    vtkNew <vtkGenericOpenGLRenderWindow> m_openGlRenWin;
    vtkNew <MyVtkInteractionStyleImage> m_InteractorStyleWin; 
    vtkNew <vtkResliceImageViewer> m_vtkImViewerWin; 
    QScopedPointer <QVTKOpenGLWidget> m_vtkWgtWin;
    vtkNew<vtkPlaneWidget> m_vtkPlaneWid;
    vtkNew <mriVtkLineWidget2> m_Line;

   m_vtkWgtWin->SetRenderWindow(m_openGlRenWin);
   m_vtkImViewerWin->SetRenderWindow(m_openGlRenWin);
   m_vtkImViewerWin->SetupInteractor(m_openGlRenWin->GetInteractor());
   
m_openGlRenWin->GetInteractor()->SetInteractorStyle(m_InteractorStyleWin);
   m_vtkPlaneWid->SetInteractor(m_vtkImViewerWin->GetInteractor());
  m_Line->SetInteractor(m_vtkImViewerWin->GetInteractor());

The code is not full, only included the relevant part,
Please help to set restrict vtkGenericOpenGLRenderWindow render
vtkResliceImageViewer  render area.



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From jcfr at kitware.com  Tue Dec 11 11:56:48 2018
From: jcfr at kitware.com (Jean-Christophe Fillion-Robin)
Date: Tue, 11 Dec 2018 11:56:48 -0500
Subject: [vtkusers] Yet another VTK, DICOM and Orientation problem
In-Reply-To: <CAE8ee6n7Ccm6v2zUCA5Nf4FnCsKJbD_nyRZrnr7i6NRe2iCe0A@mail.gmail.com>
References: <CAE8ee6n7Ccm6v2zUCA5Nf4FnCsKJbD_nyRZrnr7i6NRe2iCe0A@mail.gmail.com>
Message-ID: <CANLz8R6p_NB61i9E9DO-q4Mp4XoTtYazH1Lojr90X9sXYvPVvA@mail.gmail.com>

Hi Romain,

To learn which rotation matrix would be needed, you could load the dataset
into 3d Slicer and inspect the direction cosine in the Volumes module. See
https://download.slicer.org/

That said, considering that VTK is orientation-less (there are no direction
cosines associated with vtkImageData), building an medical image viewer is
a significant amount of work.

Also worth noting that there is a proposal to add orientation into
vtkImageData but some more validation is needed, see
https://www.slicer.org/wiki/Documentation/Labs/VTK-Orientation

Hth
Jc

On Tue, Dec 11, 2018 at 8:12 AM Romain LEGUAY <romain.leguay at gmail.com>
wrote:

> Hello everyone,
>
> I'm trying to create a viewer of dicom with anatomical views (axial,
> sagittal and coronal) from a radiologist point of view.
>
> As starting point, I use the example provided in vtkDICOM module :
> testDicomDisplay
> <https://github.com/dgobbi/vtk-dicom/blob/master/Examples/TestDICOMDisplay.cxx>
> .
> It uses vtkDICOMReader with SetMemoryRowOrderToFileNative activated.
>
> When I try to display an axial CT scan, I don't obtain expected
> orientation as you can see in pic1: the sagittal view is in Posterior ->
> Anterior direction.
> [image: pic1.png]
>
> When I try to display a sagittal CT scan, I have different orientations:
> [image: pic2.png]
>
> To fix this orientation problem, I tried to create some transformation
> matrices that converts
> Patient Coordinates (DICOM) to World Coordinate (VTK coordinates).
>
> To do this, I follow those steps:
> * get the patient matrix (Pm) using the method
> vtkDICOMReader::GetPatientMatrix (if I understand correctly, this matrix is
> in DICOM space)
> * create the rotation (Rm) from DICOM space to VTK space (rotation on VTK
> X-axis around the origin point):
> 1 0 0 0
> 0 -1 0 0
> 0 0 -1 0
> 0 0 0 1
> * Multiply Pm by Rm to obtain the matrix PRm to go from Patient
> Coordinates to VTK Coordinates.
> * Use the Matrix PRm with a point in IJK coordinates (voxel coordinates)
> multiplied by the spacing.
>
> I know I made a mistake because I don't have the result expected but I
> don't know what I did wrong...
>
> Can someone provide me some tips please?
>
> Thank you,
>
> Romain
>
>
>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From dave.demarle at kitware.com  Tue Dec 11 13:01:41 2018
From: dave.demarle at kitware.com (David E DeMarle)
Date: Tue, 11 Dec 2018 13:01:41 -0500
Subject: [vtkusers] announce: expect some website and gitlab downtime this
 coming weekend
Message-ID: <CANjZAi_HaSWqLBVttM3bTSzg+fPuxYkQB9PrFsHsKe-PONNPKw@mail.gmail.com>

Hey VTK folks,

Kitware NY is moving into a new office building this weekend. This involves
moving the company's network infrastructure. As a result, there will be
some downtime in terms of the webpage, gitlab, and the dashboard machines.

Our web servers (www.kitware.com, CMake, ParaView, VTK, ITK, etc. etc.)
will be unavailable all day Dec. 15th while we physically move everything
and complete the network cutover. We will set up a ?we are moving? page
warning visitors to many of our primary external web sites that we are
temporarily offline for maintenance. We are estimating the move to take 8
hours, give or take several hours. There is a good chance of network
connectivity being unstable for a few days afterwards while we troubleshoot
and fix any issues.

Thanks and apologies ahead of time for any disruptions.

David E DeMarle
Kitware, Inc.
Principal Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909
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From kor1581 at gmail.com  Wed Dec 12 00:55:05 2018
From: kor1581 at gmail.com (ran)
Date: Tue, 11 Dec 2018 22:55:05 -0700 (MST)
Subject: [vtkusers] How to restrict vtkGenericOpenGLRenderWindow area to
 vtkResliceImageViewer render window
Message-ID: <1544594105811-0.post@n5.nabble.com>

As part of an application for displaying DICOM images in Qt widget 
in windows 10, I'm using vtkResliceImageViewer, custom 
vtkInteractorStyleImage, vtkGenericOpenGLRenderWindow, QVTKOpenGLWidget for 
displaying and fitting the images in Qt window. 
I also use vtkPlaneWidget, mriVtkLineWidget2 widgets inside the DICOM
viewer. 
It is working properly, but the problem iswWhile Initially set the
coordinates for mriVtkLineWidget2 and vtkPlaneWidget objects it's correctly
displaying inside the DICOM image displayed area. But when moving the
widgets with mouse interactions, its rendering outside the 
DICOM image rendered area. 
But I need to restrict the widgets movement within the DICOM image displayed
area, ie within vtkResliceImageViewer render window. 

I expect the problem is the DICOM image displaying inside the 
vtkResliceImageViewer render window and the 
vtkGenericOpenGLRenderWindow render window extends beyond
vtkResliceImageViewer render window, that's because the widgets can move
beyond the DICOM displayed region.
 How can I restrict widgets inside DICOM displaying area? 

My rendering code is something like this,

    vtkNew <vtkGenericOpenGLRenderWindow> m_openGlRenWin; 
    vtkNew <MyVtkInteractionStyleImage> m_InteractorStyleWin; 
    vtkNew <vtkResliceImageViewer> m_vtkImViewerWin; 
    QScopedPointer <QVTKOpenGLWidget> m_vtkWgtWin; 
    vtkNew<vtkPlaneWidget> m_vtkPlaneWid; 
    vtkNew <mriVtkLineWidget2> m_Line; 

   m_vtkWgtWin->SetRenderWindow(m_openGlRenWin); 
   m_vtkImViewerWin->SetRenderWindow(m_openGlRenWin); 
   m_vtkImViewerWin->SetupInteractor(m_openGlRenWin->GetInteractor()); 
    
m_openGlRenWin->GetInteractor()->SetInteractorStyle(m_InteractorStyleWin); 
   m_vtkPlaneWid->SetInteractor(m_vtkImViewerWin->GetInteractor()); 
  m_Line->SetInteractor(m_vtkImViewerWin->GetInteractor()); 

The code is not full, the only relevant part is included.
Before I have implemented the same application with QVTKWidget instead of
vtkGenericOpenGLRenderWindow & QVTKOpenGLWidget at that time by default the
widget movement was restricted within vtkInteractorStyleImage.
By latest VTK release I can't use QVTKWidget so changed to
vtkGenericOpenGLRenderWindow & QVTKOpenGLWidget, then the problem occurred.
Please help to restrict the widget movement.
Is it possible to set vtkGenericOpenGLRenderWindow render area to
vtkResliceImageViewer render area?



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From Zoltan.Kovacs at esi-group.com  Wed Dec 12 05:39:43 2018
From: Zoltan.Kovacs at esi-group.com (Zoltan Kovacs)
Date: Wed, 12 Dec 2018 10:39:43 +0000
Subject: [vtkusers] Color settting in vtkParallelCoordinatesRepresentation
Message-ID: <DB6PR0902MB17682882AA812AA36B44D92DB7A70@DB6PR0902MB1768.eurprd09.prod.outlook.com>

Dear All,

I try to use the class vtkParallelCoordinatesRepresentation which has the member functions SetLineColor and SetAxisColor for color settings. However, I would like to use a color bar for class vtkParallelCoordinatesView and use the colors from the color bar for coloring the selected lines. I have found the internal array
vtkParallelCoordinatesRepresentation::Internals::Colors[10][3] in the source code of the class  vtkParallelCoordinatesRepresentation which is used for selections in the function UpdatePlotProperties setting the colors for the internal array of the  SelectionActors of the vtkParallelCoordinatesRepresentation but I could not figure out how to use them. Maybe some one knows a way how to set colors for the selected lines. Thank you very much!

Kind regards,
Zoltan
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From A.Buykx at dianafea.com  Wed Dec 12 09:51:51 2018
From: A.Buykx at dianafea.com (Andreas Buykx)
Date: Wed, 12 Dec 2018 14:51:51 +0000
Subject: [vtkusers] vtkTestOpenGLVersion header not installed?
Message-ID: <0da45091d8864d7c8ea02f4f95d3dff9@dianafea.com>

I would like to use the new delayed loading of OpenGL, but found that even when I build VTK with the VTK_USE_OPENGL_DELAYED_LOAD flag the header is not installed in the include directory even though the vtkTestOpenGLVersion.exe is built, so I have to pull it in from the source tree I suppose. Is this intentional?

Also I found that it was already available in the 8.1.1 release, but only for the 8.2 release candidate it has been explicitly mentioned. Is the 8.1.1 version OK to use?

Thanks!
Andreas

DIANA FEA BV
Software Developers and Analysis Consultants for Civil and Geotechnical Engineering

Delftechpark 19a, 2628XJ, Delft, The Netherlands
Tel: +31 88 34262 15 (Direct) ? Tel: +31 88 34262 00 (Switchboard) ? Fax: +31 88 34262 99
http://dianafea.com<http://dianafea.com/>

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From sk.shadabanwar at gmail.com  Wed Dec 12 13:40:29 2018
From: sk.shadabanwar at gmail.com (shadab anwar)
Date: Wed, 12 Dec 2018 13:40:29 -0500
Subject: [vtkusers] Problem with color and shading when rendering
 vtkimagedata
In-Reply-To: <CAEW39-qybN8px+oaCQ_LywOFHVQK0JGpy3kSfjc+FKS_6tnj1g@mail.gmail.com>
References: <CAEW39-qybN8px+oaCQ_LywOFHVQK0JGpy3kSfjc+FKS_6tnj1g@mail.gmail.com>
Message-ID: <CAEW39-oFDghepOZDup3HhPZqZJ79a617oAQ8CHJwW+kYbf66yg@mail.gmail.com>

Guys,
Waiting for reply!

Please help!




On Wed, Dec 5, 2018 at 2:08 PM shadab anwar <sk.shadabanwar at gmail.com>
wrote:

> Hey amigos,
>
> VTK noob here!
>
> I facing a few problems while rendering vtkimagedata. The code snippet as
> follows,
>
>
>  int X =4, Y=4, Z=4;
>
>        imageData->SetDimensions(X,Y,Z);
>
>        imageData->SetSpacing(1,1,1);
>
>        imageData->AllocateScalars(VTK_INT,1);
>
>
>
>  for (int k = 0; k < Z ; k++)
>
>        {
>
>            for (int j = 0; j < Y ; j++)
>
>            {
>
>                for (int i = 0; i < X ; i++)
>
>                {
>
>                    int* voxel = static_cast<int*>(imageData->GetScalarPointer(i, j, k));
>
>                       voxel[0] = 10;
>
>
>                }
>
>            }
>
>        }
>
>
>  for (int i=2;i!=-1;i--)
>
>        {
>
>        int* voxel = static_cast<int*>(imageData->GetScalarPointer(2,i,i));
>
>         voxel[0]=0;
>
>         }
>
>
>     mapper->SetBlendModeToComposite();
>
>      mapper->SetRequestedRenderModeToRayCast();
>
>       mapper->SetInputData(imageData);
>
>      compositeOpacity->AddPoint(10,1);
>
>       color->AddRGBPoint(10,1,0,0);
>
>      compositeOpacity->AddPoint(0,0);
>
>        color->AddRGBPoint(0,0,0, 0);
>
>        volumeProperty->SetAmbient(0.3);
>
>         volumeProperty->SetDiffuse(0.4);
>
>         volumeProperty->SetSpecular(0.8);
>
>        volumeProperty->SetInterpolationType(0);
>
>         volumeProperty->ShadeOn();
>
>         volumeProperty->SetColor(color);
>
>          volumeProperty->SetScalarOpacity(compositeOpacity);
>
>           renderer->SetBackground(0.5, 0.5, 0.5);
>
>         volume->SetMapper(mapper);
>
>         volume->SetProperty(volumeProperty);
>
>         renderer->AddViewProp(volume);
>
> I am getting the below results,
>
>
> [image: image for forum.jpg]  [image: image for forum2.jpg]
> [image: image for forum3.jpg]
>
>
> It can be seen that everytime I rotate my image I don't get a proper
> shading and color for the object. I have tried changing the lightining
> properties and shading properties but no sucess.
>
> I would be really thankful if anyone could help me.
>
>
> Just for your information I am mechanical engineering with a bit of programming knowledge, so if my question is irrattional please forgive me.
>
>
>
>
> Best,
>
> Shadab
>
>
>
>
>
>
>
>
>
>
>
>
>
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From aron.helser at kitware.com  Wed Dec 12 16:05:56 2018
From: aron.helser at kitware.com (Aron Helser)
Date: Wed, 12 Dec 2018 16:05:56 -0500
Subject: [vtkusers] Problem with color and shading when rendering
 vtkimagedata
In-Reply-To: <CAEW39-oFDghepOZDup3HhPZqZJ79a617oAQ8CHJwW+kYbf66yg@mail.gmail.com>
References: <CAEW39-qybN8px+oaCQ_LywOFHVQK0JGpy3kSfjc+FKS_6tnj1g@mail.gmail.com>
 <CAEW39-oFDghepOZDup3HhPZqZJ79a617oAQ8CHJwW+kYbf66yg@mail.gmail.com>
Message-ID: <CAF2skS7M+f9HDZa+tba-9fTZ2NZ_N7WY2b-Or3XLwcw4nRBQHg@mail.gmail.com>

Can you be more specific? How do the images differ from what you expect? Is
there are particular VTK example you are following that you are trying to
change?
https://lorensen.github.io/VTKExamples/site/Cxx/

Aron

On Wed, Dec 12, 2018 at 1:40 PM shadab anwar <sk.shadabanwar at gmail.com>
wrote:

> Guys,
> Waiting for reply!
>
> Please help!
>
>
>
>
> On Wed, Dec 5, 2018 at 2:08 PM shadab anwar <sk.shadabanwar at gmail.com>
> wrote:
>
>> Hey amigos,
>>
>> VTK noob here!
>>
>> I facing a few problems while rendering vtkimagedata. The code snippet as
>> follows,
>>
>>
>>  int X =4, Y=4, Z=4;
>>
>>        imageData->SetDimensions(X,Y,Z);
>>
>>        imageData->SetSpacing(1,1,1);
>>
>>        imageData->AllocateScalars(VTK_INT,1);
>>
>>
>>
>>  for (int k = 0; k < Z ; k++)
>>
>>        {
>>
>>            for (int j = 0; j < Y ; j++)
>>
>>            {
>>
>>                for (int i = 0; i < X ; i++)
>>
>>                {
>>
>>                    int* voxel = static_cast<int*>(imageData->GetScalarPointer(i, j, k));
>>
>>                       voxel[0] = 10;
>>
>>
>>                }
>>
>>            }
>>
>>        }
>>
>>
>>  for (int i=2;i!=-1;i--)
>>
>>        {
>>
>>        int* voxel = static_cast<int*>(imageData->GetScalarPointer(2,i,i));
>>
>>         voxel[0]=0;
>>
>>         }
>>
>>
>>     mapper->SetBlendModeToComposite();
>>
>>      mapper->SetRequestedRenderModeToRayCast();
>>
>>       mapper->SetInputData(imageData);
>>
>>      compositeOpacity->AddPoint(10,1);
>>
>>       color->AddRGBPoint(10,1,0,0);
>>
>>      compositeOpacity->AddPoint(0,0);
>>
>>        color->AddRGBPoint(0,0,0, 0);
>>
>>        volumeProperty->SetAmbient(0.3);
>>
>>         volumeProperty->SetDiffuse(0.4);
>>
>>         volumeProperty->SetSpecular(0.8);
>>
>>        volumeProperty->SetInterpolationType(0);
>>
>>         volumeProperty->ShadeOn();
>>
>>         volumeProperty->SetColor(color);
>>
>>          volumeProperty->SetScalarOpacity(compositeOpacity);
>>
>>           renderer->SetBackground(0.5, 0.5, 0.5);
>>
>>         volume->SetMapper(mapper);
>>
>>         volume->SetProperty(volumeProperty);
>>
>>         renderer->AddViewProp(volume);
>>
>> I am getting the below results,
>>
>>
>> [image: image for forum.jpg]  [image: image for forum2.jpg]
>> [image: image for forum3.jpg]
>>
>>
>> It can be seen that everytime I rotate my image I don't get a proper
>> shading and color for the object. I have tried changing the lightining
>> properties and shading properties but no sucess.
>>
>> I would be really thankful if anyone could help me.
>>
>>
>> Just for your information I am mechanical engineering with a bit of programming knowledge, so if my question is irrattional please forgive me.
>>
>>
>>
>>
>> Best,
>>
>> Shadab
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From sk.shadabanwar at gmail.com  Wed Dec 12 16:15:41 2018
From: sk.shadabanwar at gmail.com (shadab anwar)
Date: Wed, 12 Dec 2018 16:15:41 -0500
Subject: [vtkusers] Problem with color and shading when rendering
 vtkimagedata
In-Reply-To: <CAF2skS7M+f9HDZa+tba-9fTZ2NZ_N7WY2b-Or3XLwcw4nRBQHg@mail.gmail.com>
References: <CAEW39-qybN8px+oaCQ_LywOFHVQK0JGpy3kSfjc+FKS_6tnj1g@mail.gmail.com>
 <CAEW39-oFDghepOZDup3HhPZqZJ79a617oAQ8CHJwW+kYbf66yg@mail.gmail.com>
 <CAF2skS7M+f9HDZa+tba-9fTZ2NZ_N7WY2b-Or3XLwcw4nRBQHg@mail.gmail.com>
Message-ID: <CAEW39-pvc9bnea5BSbCN28R9=gqtZUddmWsbG8T_FkdGzuQEKw@mail.gmail.com>

Hi Aron,
Thanks for your reply.
I am not using any specific example.

I am trying to render voxels using imagedata, I have used the above code
for doing so.
The problem I am facing is that whenever I rotate the image after rendering
I don't get proper shading and uniform coloring. Instead, I am getting
above rendering results, where you can see the few voxels are shaded as
black!
I am not able to understand where I am going wrong. I tried changing
few shading and lighting parameters but no success.

I am a newbie, apology If my problem is too basic!


On Wed, Dec 12, 2018 at 4:06 PM Aron Helser <aron.helser at kitware.com> wrote:

> Can you be more specific? How do the images differ from what you expect?
> Is there are particular VTK example you are following that you are trying
> to change?
> https://lorensen.github.io/VTKExamples/site/Cxx/
>
> Aron
>
> On Wed, Dec 12, 2018 at 1:40 PM shadab anwar <sk.shadabanwar at gmail.com>
> wrote:
>
>> Guys,
>> Waiting for reply!
>>
>> Please help!
>>
>>
>>
>>
>> On Wed, Dec 5, 2018 at 2:08 PM shadab anwar <sk.shadabanwar at gmail.com>
>> wrote:
>>
>>> Hey amigos,
>>>
>>> VTK noob here!
>>>
>>> I facing a few problems while rendering vtkimagedata. The code snippet
>>> as follows,
>>>
>>>
>>>  int X =4, Y=4, Z=4;
>>>
>>>        imageData->SetDimensions(X,Y,Z);
>>>
>>>        imageData->SetSpacing(1,1,1);
>>>
>>>        imageData->AllocateScalars(VTK_INT,1);
>>>
>>>
>>>
>>>  for (int k = 0; k < Z ; k++)
>>>
>>>        {
>>>
>>>            for (int j = 0; j < Y ; j++)
>>>
>>>            {
>>>
>>>                for (int i = 0; i < X ; i++)
>>>
>>>                {
>>>
>>>                    int* voxel = static_cast<int*>(imageData->GetScalarPointer(i, j, k));
>>>
>>>                       voxel[0] = 10;
>>>
>>>
>>>                }
>>>
>>>            }
>>>
>>>        }
>>>
>>>
>>>  for (int i=2;i!=-1;i--)
>>>
>>>        {
>>>
>>>        int* voxel = static_cast<int*>(imageData->GetScalarPointer(2,i,i));
>>>
>>>         voxel[0]=0;
>>>
>>>         }
>>>
>>>
>>>     mapper->SetBlendModeToComposite();
>>>
>>>      mapper->SetRequestedRenderModeToRayCast();
>>>
>>>       mapper->SetInputData(imageData);
>>>
>>>      compositeOpacity->AddPoint(10,1);
>>>
>>>       color->AddRGBPoint(10,1,0,0);
>>>
>>>      compositeOpacity->AddPoint(0,0);
>>>
>>>        color->AddRGBPoint(0,0,0, 0);
>>>
>>>        volumeProperty->SetAmbient(0.3);
>>>
>>>         volumeProperty->SetDiffuse(0.4);
>>>
>>>         volumeProperty->SetSpecular(0.8);
>>>
>>>        volumeProperty->SetInterpolationType(0);
>>>
>>>         volumeProperty->ShadeOn();
>>>
>>>         volumeProperty->SetColor(color);
>>>
>>>          volumeProperty->SetScalarOpacity(compositeOpacity);
>>>
>>>           renderer->SetBackground(0.5, 0.5, 0.5);
>>>
>>>         volume->SetMapper(mapper);
>>>
>>>         volume->SetProperty(volumeProperty);
>>>
>>>         renderer->AddViewProp(volume);
>>>
>>> I am getting the below results,
>>>
>>>
>>> [image: image for forum.jpg]  [image: image for forum2.jpg]
>>> [image: image for forum3.jpg]
>>>
>>>
>>> It can be seen that everytime I rotate my image I don't get a proper
>>> shading and color for the object. I have tried changing the lightining
>>> properties and shading properties but no sucess.
>>>
>>> I would be really thankful if anyone could help me.
>>>
>>>
>>> Just for your information I am mechanical engineering with a bit of programming knowledge, so if my question is irrattional please forgive me.
>>>
>>>
>>>
>>>
>>> Best,
>>>
>>> Shadab
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>
>> Follow this link to subscribe/unsubscribe:
>> https://public.kitware.com/mailman/listinfo/vtkusers
>>
>
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From aron.helser at kitware.com  Wed Dec 12 17:51:14 2018
From: aron.helser at kitware.com (Aron Helser)
Date: Wed, 12 Dec 2018 17:51:14 -0500
Subject: [vtkusers] Problem with color and shading when rendering
 vtkimagedata
In-Reply-To: <CAEW39-pvc9bnea5BSbCN28R9=gqtZUddmWsbG8T_FkdGzuQEKw@mail.gmail.com>
References: <CAEW39-qybN8px+oaCQ_LywOFHVQK0JGpy3kSfjc+FKS_6tnj1g@mail.gmail.com>
 <CAEW39-oFDghepOZDup3HhPZqZJ79a617oAQ8CHJwW+kYbf66yg@mail.gmail.com>
 <CAF2skS7M+f9HDZa+tba-9fTZ2NZ_N7WY2b-Or3XLwcw4nRBQHg@mail.gmail.com>
 <CAEW39-pvc9bnea5BSbCN28R9=gqtZUddmWsbG8T_FkdGzuQEKw@mail.gmail.com>
Message-ID: <CAF2skS6LsQCR2TK9ggh_Z0F0KmsUHORQ7=XosXYJ9f1ivw9aXg@mail.gmail.com>

I have no experience with volume rendering in vtk, so my best suggestion is
to look at some of the examples:
https://lorensen.github.io/VTKExamples/site/Cxx/#volume-rendering
and see how the parameters are set there, compared to your code.
You might have success modifying one of the examples to use your data.

On Wed, Dec 12, 2018 at 4:15 PM shadab anwar <sk.shadabanwar at gmail.com>
wrote:

> Hi Aron,
> Thanks for your reply.
> I am not using any specific example.
>
> I am trying to render voxels using imagedata, I have used the above code
> for doing so.
> The problem I am facing is that whenever I rotate the image after
> rendering I don't get proper shading and uniform coloring. Instead, I am
> getting above rendering results, where you can see the few voxels are
> shaded as black!
> I am not able to understand where I am going wrong. I tried changing
> few shading and lighting parameters but no success.
>
> I am a newbie, apology If my problem is too basic!
>
>
> On Wed, Dec 12, 2018 at 4:06 PM Aron Helser <aron.helser at kitware.com>
> wrote:
>
>> Can you be more specific? How do the images differ from what you expect?
>> Is there are particular VTK example you are following that you are trying
>> to change?
>> https://lorensen.github.io/VTKExamples/site/Cxx/
>>
>> Aron
>>
>> On Wed, Dec 12, 2018 at 1:40 PM shadab anwar <sk.shadabanwar at gmail.com>
>> wrote:
>>
>>> Guys,
>>> Waiting for reply!
>>>
>>> Please help!
>>>
>>>
>>>
>>>
>>> On Wed, Dec 5, 2018 at 2:08 PM shadab anwar <sk.shadabanwar at gmail.com>
>>> wrote:
>>>
>>>> Hey amigos,
>>>>
>>>> VTK noob here!
>>>>
>>>> I facing a few problems while rendering vtkimagedata. The code snippet
>>>> as follows,
>>>>
>>>>
>>>>  int X =4, Y=4, Z=4;
>>>>
>>>>        imageData->SetDimensions(X,Y,Z);
>>>>
>>>>        imageData->SetSpacing(1,1,1);
>>>>
>>>>        imageData->AllocateScalars(VTK_INT,1);
>>>>
>>>>
>>>>
>>>>  for (int k = 0; k < Z ; k++)
>>>>
>>>>        {
>>>>
>>>>            for (int j = 0; j < Y ; j++)
>>>>
>>>>            {
>>>>
>>>>                for (int i = 0; i < X ; i++)
>>>>
>>>>                {
>>>>
>>>>                    int* voxel = static_cast<int*>(imageData->GetScalarPointer(i, j, k));
>>>>
>>>>                       voxel[0] = 10;
>>>>
>>>>
>>>>                }
>>>>
>>>>            }
>>>>
>>>>        }
>>>>
>>>>
>>>>  for (int i=2;i!=-1;i--)
>>>>
>>>>        {
>>>>
>>>>        int* voxel = static_cast<int*>(imageData->GetScalarPointer(2,i,i));
>>>>
>>>>         voxel[0]=0;
>>>>
>>>>         }
>>>>
>>>>
>>>>     mapper->SetBlendModeToComposite();
>>>>
>>>>      mapper->SetRequestedRenderModeToRayCast();
>>>>
>>>>       mapper->SetInputData(imageData);
>>>>
>>>>      compositeOpacity->AddPoint(10,1);
>>>>
>>>>       color->AddRGBPoint(10,1,0,0);
>>>>
>>>>      compositeOpacity->AddPoint(0,0);
>>>>
>>>>        color->AddRGBPoint(0,0,0, 0);
>>>>
>>>>        volumeProperty->SetAmbient(0.3);
>>>>
>>>>         volumeProperty->SetDiffuse(0.4);
>>>>
>>>>         volumeProperty->SetSpecular(0.8);
>>>>
>>>>        volumeProperty->SetInterpolationType(0);
>>>>
>>>>         volumeProperty->ShadeOn();
>>>>
>>>>         volumeProperty->SetColor(color);
>>>>
>>>>          volumeProperty->SetScalarOpacity(compositeOpacity);
>>>>
>>>>           renderer->SetBackground(0.5, 0.5, 0.5);
>>>>
>>>>         volume->SetMapper(mapper);
>>>>
>>>>         volume->SetProperty(volumeProperty);
>>>>
>>>>         renderer->AddViewProp(volume);
>>>>
>>>> I am getting the below results,
>>>>
>>>>
>>>> [image: image for forum.jpg]  [image: image for forum2.jpg]
>>>> [image: image for forum3.jpg]
>>>>
>>>>
>>>> It can be seen that everytime I rotate my image I don't get a proper
>>>> shading and color for the object. I have tried changing the lightining
>>>> properties and shading properties but no sucess.
>>>>
>>>> I would be really thankful if anyone could help me.
>>>>
>>>>
>>>> Just for your information I am mechanical engineering with a bit of programming knowledge, so if my question is irrattional please forgive me.
>>>>
>>>>
>>>>
>>>>
>>>> Best,
>>>>
>>>> Shadab
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>
>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>
>>
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From sk.shadabanwar at gmail.com  Wed Dec 12 18:00:07 2018
From: sk.shadabanwar at gmail.com (shadab anwar)
Date: Wed, 12 Dec 2018 18:00:07 -0500
Subject: [vtkusers] Problem with color and shading when rendering
 vtkimagedata
In-Reply-To: <CAF2skS6LsQCR2TK9ggh_Z0F0KmsUHORQ7=XosXYJ9f1ivw9aXg@mail.gmail.com>
References: <CAEW39-qybN8px+oaCQ_LywOFHVQK0JGpy3kSfjc+FKS_6tnj1g@mail.gmail.com>
 <CAEW39-oFDghepOZDup3HhPZqZJ79a617oAQ8CHJwW+kYbf66yg@mail.gmail.com>
 <CAF2skS7M+f9HDZa+tba-9fTZ2NZ_N7WY2b-Or3XLwcw4nRBQHg@mail.gmail.com>
 <CAEW39-pvc9bnea5BSbCN28R9=gqtZUddmWsbG8T_FkdGzuQEKw@mail.gmail.com>
 <CAF2skS6LsQCR2TK9ggh_Z0F0KmsUHORQ7=XosXYJ9f1ivw9aXg@mail.gmail.com>
Message-ID: <CAEW39-pvHkGQUVTDu7GTsq0NV0iskk-Be31huaBO=7JHxahq0Q@mail.gmail.com>

Aron,
Thanks! I have been through these examples.
I'll be happy if you can suggest my question to someone who has an
experience in volume rendering.

Thanks,
Shadab

On Wed, Dec 12, 2018 at 5:51 PM Aron Helser <aron.helser at kitware.com> wrote:

> I have no experience with volume rendering in vtk, so my best suggestion
> is to look at some of the examples:
> https://lorensen.github.io/VTKExamples/site/Cxx/#volume-rendering
> and see how the parameters are set there, compared to your code.
> You might have success modifying one of the examples to use your data.
>
> On Wed, Dec 12, 2018 at 4:15 PM shadab anwar <sk.shadabanwar at gmail.com>
> wrote:
>
>> Hi Aron,
>> Thanks for your reply.
>> I am not using any specific example.
>>
>> I am trying to render voxels using imagedata, I have used the above code
>> for doing so.
>> The problem I am facing is that whenever I rotate the image after
>> rendering I don't get proper shading and uniform coloring. Instead, I am
>> getting above rendering results, where you can see the few voxels are
>> shaded as black!
>> I am not able to understand where I am going wrong. I tried changing
>> few shading and lighting parameters but no success.
>>
>> I am a newbie, apology If my problem is too basic!
>>
>>
>> On Wed, Dec 12, 2018 at 4:06 PM Aron Helser <aron.helser at kitware.com>
>> wrote:
>>
>>> Can you be more specific? How do the images differ from what you expect?
>>> Is there are particular VTK example you are following that you are trying
>>> to change?
>>> https://lorensen.github.io/VTKExamples/site/Cxx/
>>>
>>> Aron
>>>
>>> On Wed, Dec 12, 2018 at 1:40 PM shadab anwar <sk.shadabanwar at gmail.com>
>>> wrote:
>>>
>>>> Guys,
>>>> Waiting for reply!
>>>>
>>>> Please help!
>>>>
>>>>
>>>>
>>>>
>>>> On Wed, Dec 5, 2018 at 2:08 PM shadab anwar <sk.shadabanwar at gmail.com>
>>>> wrote:
>>>>
>>>>> Hey amigos,
>>>>>
>>>>> VTK noob here!
>>>>>
>>>>> I facing a few problems while rendering vtkimagedata. The code snippet
>>>>> as follows,
>>>>>
>>>>>
>>>>>  int X =4, Y=4, Z=4;
>>>>>
>>>>>        imageData->SetDimensions(X,Y,Z);
>>>>>
>>>>>        imageData->SetSpacing(1,1,1);
>>>>>
>>>>>        imageData->AllocateScalars(VTK_INT,1);
>>>>>
>>>>>
>>>>>
>>>>>  for (int k = 0; k < Z ; k++)
>>>>>
>>>>>        {
>>>>>
>>>>>            for (int j = 0; j < Y ; j++)
>>>>>
>>>>>            {
>>>>>
>>>>>                for (int i = 0; i < X ; i++)
>>>>>
>>>>>                {
>>>>>
>>>>>                    int* voxel = static_cast<int*>(imageData->GetScalarPointer(i, j, k));
>>>>>
>>>>>                       voxel[0] = 10;
>>>>>
>>>>>
>>>>>                }
>>>>>
>>>>>            }
>>>>>
>>>>>        }
>>>>>
>>>>>
>>>>>  for (int i=2;i!=-1;i--)
>>>>>
>>>>>        {
>>>>>
>>>>>        int* voxel = static_cast<int*>(imageData->GetScalarPointer(2,i,i));
>>>>>
>>>>>         voxel[0]=0;
>>>>>
>>>>>         }
>>>>>
>>>>>
>>>>>     mapper->SetBlendModeToComposite();
>>>>>
>>>>>      mapper->SetRequestedRenderModeToRayCast();
>>>>>
>>>>>       mapper->SetInputData(imageData);
>>>>>
>>>>>      compositeOpacity->AddPoint(10,1);
>>>>>
>>>>>       color->AddRGBPoint(10,1,0,0);
>>>>>
>>>>>      compositeOpacity->AddPoint(0,0);
>>>>>
>>>>>        color->AddRGBPoint(0,0,0, 0);
>>>>>
>>>>>        volumeProperty->SetAmbient(0.3);
>>>>>
>>>>>         volumeProperty->SetDiffuse(0.4);
>>>>>
>>>>>         volumeProperty->SetSpecular(0.8);
>>>>>
>>>>>        volumeProperty->SetInterpolationType(0);
>>>>>
>>>>>         volumeProperty->ShadeOn();
>>>>>
>>>>>         volumeProperty->SetColor(color);
>>>>>
>>>>>          volumeProperty->SetScalarOpacity(compositeOpacity);
>>>>>
>>>>>           renderer->SetBackground(0.5, 0.5, 0.5);
>>>>>
>>>>>         volume->SetMapper(mapper);
>>>>>
>>>>>         volume->SetProperty(volumeProperty);
>>>>>
>>>>>         renderer->AddViewProp(volume);
>>>>>
>>>>> I am getting the below results,
>>>>>
>>>>>
>>>>> [image: image for forum.jpg]  [image: image for forum2.jpg]
>>>>> [image: image for forum3.jpg]
>>>>>
>>>>>
>>>>> It can be seen that everytime I rotate my image I don't get a proper
>>>>> shading and color for the object. I have tried changing the lightining
>>>>> properties and shading properties but no sucess.
>>>>>
>>>>> I would be really thankful if anyone could help me.
>>>>>
>>>>>
>>>>> Just for your information I am mechanical engineering with a bit of programming knowledge, so if my question is irrattional please forgive me.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Best,
>>>>>
>>>>> Shadab
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>> Powered by www.kitware.com
>>>>
>>>> Visit other Kitware open-source projects at
>>>> http://www.kitware.com/opensource/opensource.html
>>>>
>>>> Please keep messages on-topic and check the VTK FAQ at:
>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>
>>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>>
>>>> Follow this link to subscribe/unsubscribe:
>>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>>
>>>
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From poweruserm at live.com.au  Wed Dec 12 20:07:45 2018
From: poweruserm at live.com.au (A Z)
Date: Thu, 13 Dec 2018 01:07:45 +0000
Subject: [vtkusers] VTK compiled libraries?
Message-ID: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>

To who in VTK it concerns,

My professional situationis such that my PC can't be allowed to install
compiling tools like cygwin.

Because of this, I am not in a position to compile and build the vtk library
for Windows from source.

Because of this situation, is it possible for VTK to compile and build
the VTK in a 64 bit .dll file form, and to avail that for public download?

Could someone specifically reply to my question on this issue
when it applies in the email list, kindly?

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From nztoddler at yahoo.com  Wed Dec 12 20:16:21 2018
From: nztoddler at yahoo.com (Todd Martin)
Date: Thu, 13 Dec 2018 01:16:21 +0000 (UTC)
Subject: [vtkusers] VTK compiled libraries?
In-Reply-To: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
References: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
Message-ID: <466063117.3743877.1544663781728@mail.yahoo.com>

If you cannot install compiler tools, how do you intend to use VTK?The easiest way to build VTK on windows is using Visual Studio. Then there's no need for cygwin.

Todd Martin, PhD.
Freelance Engineer/Software Architect.
 

    On Thursday, 13 December 2018, 2:07:56 PM NZDT, A Z <poweruserm at live.com.au> wrote:  
 
  #yiv6854767267 P {margin-top:0;margin-bottom:0;}To who in VTK it concerns,

My professional situationis such that my PC can't be allowed to installcompiling tools like cygwin.
Because of this, I am not in a position to compile and build the vtk libraryfor Windows from source.
Because of this situation, is it possible for VTK to compile and buildthe VTK in a 64 bit .dll file form, and to avail that for public download?
Could someone specifically reply to my question on this issuewhen it applies in the email list, kindly?
_______________________________________________
Powered by www.kitware.com

Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html

Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ

Search the list archives at: http://markmail.org/search/?q=vtkusers

Follow this link to subscribe/unsubscribe:
https://public.kitware.com/mailman/listinfo/vtkusers
  
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From sebastien.jourdain at kitware.com  Wed Dec 12 22:42:11 2018
From: sebastien.jourdain at kitware.com (Sebastien Jourdain)
Date: Wed, 12 Dec 2018 20:42:11 -0700
Subject: [vtkusers] VTK compiled libraries?
In-Reply-To: <466063117.3743877.1544663781728@mail.yahoo.com>
References: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
 <466063117.3743877.1544663781728@mail.yahoo.com>
Message-ID: <CABObKxfn8dTNK6ABont9WzMXoYMKmS9fpNhhasK7nesvASmjpA@mail.gmail.com>

You can also download ParaView and use the pvpython executable if you are
planning to use VTK via Python.

On Wed, Dec 12, 2018 at 6:16 PM Todd Martin via vtkusers <
vtkusers at public.kitware.com> wrote:

> If you cannot install compiler tools, how do you intend to use VTK?
> The easiest way to build VTK on windows is using Visual Studio. Then
> there's no need for cygwin.
>
> Todd Martin, PhD.
> *Freelance Engineer/Software Architect.*
>
>
>
> On Thursday, 13 December 2018, 2:07:56 PM NZDT, A Z <
> poweruserm at live.com.au> wrote:
>
>
> To who in VTK it concerns,
>
> My professional situationis such that my PC can't be allowed to install
> compiling tools like cygwin.
>
> Because of this, I am not in a position to compile and build the vtk
> library
> for Windows from source.
>
> Because of this situation, is it possible for VTK to compile and build
> the VTK in a 64 bit .dll file form, and to avail that for public download?
>
> Could someone specifically reply to my question on this issue
> when it applies in the email list, kindly?
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From ftpronk at engits.com  Thu Dec 13 04:28:31 2018
From: ftpronk at engits.com (Fcs)
Date: Thu, 13 Dec 2018 02:28:31 -0700 (MST)
Subject: [vtkusers] VTK compiled libraries?
In-Reply-To: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
References: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
Message-ID: <1544693311280-0.post@n5.nabble.com>

This sounds pointless..  How are you going to access the VTK libraries if you
cannot compile a program and link to the libraries? And if your system
doesn't allow you to install cygwin, why would it allow you to install
external dlls?

Anyway, more constructively, if you do have some basic installation rights,
you could try a stand-alone python install, and grab the vtk libraries
compatible with that version.  I don't know if conda/miniconda qualifies,
but you could give it a try. Perhaps portablepython would work too.







--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From rubendibattista at gmail.com  Thu Dec 13 04:31:07 2018
From: rubendibattista at gmail.com (Ruben Di Battista)
Date: Thu, 13 Dec 2018 10:31:07 +0100
Subject: [vtkusers] VTK compiled libraries?
In-Reply-To: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
References: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
Message-ID: <CACnYWRd0WZP=y6symz+BZQQbYewibApUS0BRCrQC4Qe1MsarhA@mail.gmail.com>

I could be wrong, but I think cygwin doesn't require admin rights to be
installed.

On Thu, 13 Dec 2018, 02:07 A Z <poweruserm at live.com.au wrote:

> To who in VTK it concerns,
>
> My professional situationis such that my PC can't be allowed to install
> compiling tools like cygwin.
>
> Because of this, I am not in a position to compile and build the vtk
> library
> for Windows from source.
>
> Because of this situation, is it possible for VTK to compile and build
> the VTK in a 64 bit .dll file form, and to avail that for public download?
>
> Could someone specifically reply to my question on this issue
> when it applies in the email list, kindly?
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From rubendibattista at gmail.com  Thu Dec 13 08:44:33 2018
From: rubendibattista at gmail.com (Ruben Di Battista)
Date: Thu, 13 Dec 2018 14:44:33 +0100
Subject: [vtkusers] VTK compiled libraries?
In-Reply-To: <CA+xrYwgujo0JH3rHUafZaVTDv6v2tyanWS4XStabJL4xX1ffyg@mail.gmail.com>
References: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
 <CACnYWRd0WZP=y6symz+BZQQbYewibApUS0BRCrQC4Qe1MsarhA@mail.gmail.com>
 <CA+xrYwgujo0JH3rHUafZaVTDv6v2tyanWS4XStabJL4xX1ffyg@mail.gmail.com>
Message-ID: <CACnYWReumziZNSohPr_j9PTqEkprfySO+QSLqQaQstf9UO47ZA@mail.gmail.com>

Just to keep the discussion in the mailing list... :)

On Thu, 13 Dec 2018, 14:37 Paulo Carvalho <paulo.r.m.carvalho at gmail.com
wrote:

> I installed MSYS2 without admin privileges.  From its bash console, you
> can do a pacman -S mingw-w64-x86_64-vtk to install VTK precompiled
> libraries.  Then you can look into where MSYS2 keeps the libraries (look
> for the files in MSYS2's installation directories).  That package is for
> linking with MinGW64 (.a files).
>
> Em qui, 13 de dez de 2018 ?s 07:31, Ruben Di Battista <
> rubendibattista at gmail.com> escreveu:
>
>> I could be wrong, but I think cygwin doesn't require admin rights to be
>> installed.
>>
>> On Thu, 13 Dec 2018, 02:07 A Z <poweruserm at live.com.au wrote:
>>
>>> To who in VTK it concerns,
>>>
>>> My professional situationis such that my PC can't be allowed to install
>>> compiling tools like cygwin.
>>>
>>> Because of this, I am not in a position to compile and build the vtk
>>> library
>>> for Windows from source.
>>>
>>> Because of this situation, is it possible for VTK to compile and build
>>> the VTK in a 64 bit .dll file form, and to avail that for public
>>> download?
>>>
>>> Could someone specifically reply to my question on this issue
>>> when it applies in the email list, kindly?
>>>
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>
>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>
>> Follow this link to subscribe/unsubscribe:
>> https://public.kitware.com/mailman/listinfo/vtkusers
>>
>
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From divyarathore at gmail.com  Thu Dec 13 10:20:29 2018
From: divyarathore at gmail.com (Divya Rathore)
Date: Thu, 13 Dec 2018 15:20:29 +0000
Subject: [vtkusers] VTK compiled libraries?
In-Reply-To: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
References: <SL2P216MB05883B6D307903E4E320C8F19AA00@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
Message-ID: <CAMWXqfRHs+AsUQ2E3Zr6cw3rk-Ogw+Mht5sRwc6ZYnMF2OrX_g@mail.gmail.com>

How about using Paraview?
Can't recall if it has a installer that requires admin privilege.

Best regards,
Divya

On Thu, 13 Dec 2018, 1:07 am A Z <poweruserm at live.com.au wrote:

> To who in VTK it concerns,
>
> My professional situationis such that my PC can't be allowed to install
> compiling tools like cygwin.
>
> Because of this, I am not in a position to compile and build the vtk
> library
> for Windows from source.
>
> Because of this situation, is it possible for VTK to compile and build
> the VTK in a 64 bit .dll file form, and to avail that for public download?
>
> Could someone specifically reply to my question on this issue
> when it applies in the email list, kindly?
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From raimonds at cenos-platform.com  Thu Dec 13 11:00:35 2018
From: raimonds at cenos-platform.com (Raimonds Vilums)
Date: Thu, 13 Dec 2018 18:00:35 +0200
Subject: [vtkusers] vtk.js: display particular cells with
 alpha/transparency/opacity
Message-ID: <CACGVHeDVGmzrmKr=srVwZgZY2B4jE7DdDv_HRjR=3uyaTGoq6g@mail.gmail.com>

Hi,

Is it possible to display cells with custom opacity for each cell?

Till now, I managed
1) set opacity to the actor (e.g., actor.getProperty().setOpacity(0.5))
2) color cells with solid colors, e.g:


   - vtk file contains CELL_DATA array of floats with 3 components for
   every color
   -

   mapper.setColorModeToDirectScalars();

   -

   mapper.setScalarModeToUseCellFieldData();

   -

   mapper.setColorByArrayName('my_cell_data');


But I could not find a way to set alpha/opacity/transparency for particular
cells.
Is it possible?

Regards,
Raimonds
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From sebastien.jourdain at kitware.com  Thu Dec 13 11:09:50 2018
From: sebastien.jourdain at kitware.com (Sebastien Jourdain)
Date: Thu, 13 Dec 2018 09:09:50 -0700
Subject: [vtkusers] vtk.js: display particular cells with
 alpha/transparency/opacity
In-Reply-To: <CACGVHeDVGmzrmKr=srVwZgZY2B4jE7DdDv_HRjR=3uyaTGoq6g@mail.gmail.com>
References: <CACGVHeDVGmzrmKr=srVwZgZY2B4jE7DdDv_HRjR=3uyaTGoq6g@mail.gmail.com>
Message-ID: <CABObKxekZ2bRPf=ZXJHH+h=nW7Q1n9e3bhhPsDa_B98zaDooJg@mail.gmail.com>

You should be able to have an array with 4 components (RGBA)

On Thu, Dec 13, 2018 at 9:01 AM Raimonds Vilums <raimonds at cenos-platform.com>
wrote:

> Hi,
>
> Is it possible to display cells with custom opacity for each cell?
>
> Till now, I managed
> 1) set opacity to the actor (e.g., actor.getProperty().setOpacity(0.5))
> 2) color cells with solid colors, e.g:
>
>
>    - vtk file contains CELL_DATA array of floats with 3 components for
>    every color
>    -
>
>    mapper.setColorModeToDirectScalars();
>
>    -
>
>    mapper.setScalarModeToUseCellFieldData();
>
>    -
>
>    mapper.setColorByArrayName('my_cell_data');
>
>
> But I could not find a way to set alpha/opacity/transparency for
> particular cells.
> Is it possible?
>
> Regards,
> Raimonds
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From raimonds at cenos-platform.com  Thu Dec 13 11:24:59 2018
From: raimonds at cenos-platform.com (Raimonds Vilums)
Date: Thu, 13 Dec 2018 18:24:59 +0200
Subject: [vtkusers] vtk.js: display particular cells with
 alpha/transparency/opacity
In-Reply-To: <CABObKxekZ2bRPf=ZXJHH+h=nW7Q1n9e3bhhPsDa_B98zaDooJg@mail.gmail.com>
References: <CACGVHeDVGmzrmKr=srVwZgZY2B4jE7DdDv_HRjR=3uyaTGoq6g@mail.gmail.com>
 <CABObKxekZ2bRPf=ZXJHH+h=nW7Q1n9e3bhhPsDa_B98zaDooJg@mail.gmail.com>
Message-ID: <CACGVHeAysWqG+nxy5tdVmML2u8z4tDypO3ptmBOQY904d3CdTw@mail.gmail.com>

I tried and got

index.js:441 Uncaught (in promise) TypeError: Cannot add property 3, object
is not extensible
    at Object.publicAPI.rGBAToRGBA (index.js:441)
    at Object.publicAPI.convertToRGBA (index.js:487)
    at Object.publicAPI.mapScalars (index.js:238)
    at Object.publicAPI.mapScalars (index.js:272)



On Thu, Dec 13, 2018 at 6:10 PM Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> You should be able to have an array with 4 components (RGBA)
>
> On Thu, Dec 13, 2018 at 9:01 AM Raimonds Vilums <
> raimonds at cenos-platform.com> wrote:
>
>> Hi,
>>
>> Is it possible to display cells with custom opacity for each cell?
>>
>> Till now, I managed
>> 1) set opacity to the actor (e.g., actor.getProperty().setOpacity(0.5))
>> 2) color cells with solid colors, e.g:
>>
>>
>>    - vtk file contains CELL_DATA array of floats with 3 components for
>>    every color
>>    -
>>
>>    mapper.setColorModeToDirectScalars();
>>
>>    -
>>
>>    mapper.setScalarModeToUseCellFieldData();
>>
>>    -
>>
>>    mapper.setColorByArrayName('my_cell_data');
>>
>>
>> But I could not find a way to set alpha/opacity/transparency for
>> particular cells.
>> Is it possible?
>>
>> Regards,
>> Raimonds
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>
>> Follow this link to subscribe/unsubscribe:
>> https://public.kitware.com/mailman/listinfo/vtkusers
>>
>
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From sebastien.jourdain at kitware.com  Thu Dec 13 11:59:03 2018
From: sebastien.jourdain at kitware.com (Sebastien Jourdain)
Date: Thu, 13 Dec 2018 09:59:03 -0700
Subject: [vtkusers] vtk.js: display particular cells with
 alpha/transparency/opacity
In-Reply-To: <CACGVHeAysWqG+nxy5tdVmML2u8z4tDypO3ptmBOQY904d3CdTw@mail.gmail.com>
References: <CACGVHeDVGmzrmKr=srVwZgZY2B4jE7DdDv_HRjR=3uyaTGoq6g@mail.gmail.com>
 <CABObKxekZ2bRPf=ZXJHH+h=nW7Q1n9e3bhhPsDa_B98zaDooJg@mail.gmail.com>
 <CACGVHeAysWqG+nxy5tdVmML2u8z4tDypO3ptmBOQY904d3CdTw@mail.gmail.com>
Message-ID: <CABObKxc2kWxzmDpUYivaNHj1NQL9q7nwSDMSkAJTOtOBc3jGhw@mail.gmail.com>

Can you do a codepen and share it so I can see what you are doing exactly?

On Thu, Dec 13, 2018 at 9:26 AM Raimonds Vilums <raimonds at cenos-platform.com>
wrote:

> I tried and got
>
> index.js:441 Uncaught (in promise) TypeError: Cannot add property 3,
> object is not extensible
>     at Object.publicAPI.rGBAToRGBA (index.js:441)
>     at Object.publicAPI.convertToRGBA (index.js:487)
>     at Object.publicAPI.mapScalars (index.js:238)
>     at Object.publicAPI.mapScalars (index.js:272)
>
>
>
> On Thu, Dec 13, 2018 at 6:10 PM Sebastien Jourdain <
> sebastien.jourdain at kitware.com> wrote:
>
>> You should be able to have an array with 4 components (RGBA)
>>
>> On Thu, Dec 13, 2018 at 9:01 AM Raimonds Vilums <
>> raimonds at cenos-platform.com> wrote:
>>
>>> Hi,
>>>
>>> Is it possible to display cells with custom opacity for each cell?
>>>
>>> Till now, I managed
>>> 1) set opacity to the actor (e.g., actor.getProperty().setOpacity(0.5))
>>> 2) color cells with solid colors, e.g:
>>>
>>>
>>>    - vtk file contains CELL_DATA array of floats with 3 components for
>>>    every color
>>>    -
>>>
>>>    mapper.setColorModeToDirectScalars();
>>>
>>>    -
>>>
>>>    mapper.setScalarModeToUseCellFieldData();
>>>
>>>    -
>>>
>>>    mapper.setColorByArrayName('my_cell_data');
>>>
>>>
>>> But I could not find a way to set alpha/opacity/transparency for
>>> particular cells.
>>> Is it possible?
>>>
>>> Regards,
>>> Raimonds
>>>
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>
>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>
>>
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From raimonds at cenos-platform.com  Fri Dec 14 05:21:48 2018
From: raimonds at cenos-platform.com (Raimonds Vilums)
Date: Fri, 14 Dec 2018 12:21:48 +0200
Subject: [vtkusers] vtk.js: display particular cells with
 alpha/transparency/opacity
In-Reply-To: <CABObKxc2kWxzmDpUYivaNHj1NQL9q7nwSDMSkAJTOtOBc3jGhw@mail.gmail.com>
References: <CACGVHeDVGmzrmKr=srVwZgZY2B4jE7DdDv_HRjR=3uyaTGoq6g@mail.gmail.com>
 <CABObKxekZ2bRPf=ZXJHH+h=nW7Q1n9e3bhhPsDa_B98zaDooJg@mail.gmail.com>
 <CACGVHeAysWqG+nxy5tdVmML2u8z4tDypO3ptmBOQY904d3CdTw@mail.gmail.com>
 <CABObKxc2kWxzmDpUYivaNHj1NQL9q7nwSDMSkAJTOtOBc3jGhw@mail.gmail.com>
Message-ID: <CACGVHeA377Z4Bygpz7tK9WRs1OTWOU7fcF147GRh5zNQHVg-Rg@mail.gmail.com>

https://codepen.io/raimonds-vilums/pen/OrMrEz

After load, you can see colored cells without transparency (3-component
array).

For loading 4-component array, change array name on line 187
from mapper.setColorByArrayName('*rgbData*');
to mapper.setColorByArrayName('*rgbaData*');
which does not work.

Raimonds


On Thu, Dec 13, 2018 at 6:59 PM Sebastien Jourdain <
sebastien.jourdain at kitware.com> wrote:

> Can you do a codepen and share it so I can see what you are doing exactly?
>
> On Thu, Dec 13, 2018 at 9:26 AM Raimonds Vilums <
> raimonds at cenos-platform.com> wrote:
>
>> I tried and got
>>
>> index.js:441 Uncaught (in promise) TypeError: Cannot add property 3,
>> object is not extensible
>>     at Object.publicAPI.rGBAToRGBA (index.js:441)
>>     at Object.publicAPI.convertToRGBA (index.js:487)
>>     at Object.publicAPI.mapScalars (index.js:238)
>>     at Object.publicAPI.mapScalars (index.js:272)
>>
>>
>>
>> On Thu, Dec 13, 2018 at 6:10 PM Sebastien Jourdain <
>> sebastien.jourdain at kitware.com> wrote:
>>
>>> You should be able to have an array with 4 components (RGBA)
>>>
>>> On Thu, Dec 13, 2018 at 9:01 AM Raimonds Vilums <
>>> raimonds at cenos-platform.com> wrote:
>>>
>>>> Hi,
>>>>
>>>> Is it possible to display cells with custom opacity for each cell?
>>>>
>>>> Till now, I managed
>>>> 1) set opacity to the actor (e.g., actor.getProperty().setOpacity(0.5))
>>>> 2) color cells with solid colors, e.g:
>>>>
>>>>
>>>>    - vtk file contains CELL_DATA array of floats with 3 components for
>>>>    every color
>>>>    -
>>>>
>>>>    mapper.setColorModeToDirectScalars();
>>>>
>>>>    -
>>>>
>>>>    mapper.setScalarModeToUseCellFieldData();
>>>>
>>>>    -
>>>>
>>>>    mapper.setColorByArrayName('my_cell_data');
>>>>
>>>>
>>>> But I could not find a way to set alpha/opacity/transparency for
>>>> particular cells.
>>>> Is it possible?
>>>>
>>>> Regards,
>>>> Raimonds
>>>>
>>>> _______________________________________________
>>>> Powered by www.kitware.com
>>>>
>>>> Visit other Kitware open-source projects at
>>>> http://www.kitware.com/opensource/opensource.html
>>>>
>>>> Please keep messages on-topic and check the VTK FAQ at:
>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>
>>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>>
>>>> Follow this link to subscribe/unsubscribe:
>>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>>
>>>
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From aminemzoughi at febus-optics.com  Fri Dec 14 09:51:00 2018
From: aminemzoughi at febus-optics.com (Mohamed Amine Mzoughi)
Date: Fri, 14 Dec 2018 15:51:00 +0100
Subject: [vtkusers] 2D Histogram (or spectrogram) chart
Message-ID: <0c0e73f3-190a-8826-e801-22a34adf4759@febus-optics.com>

Hello,

I've seen this screenshot of a 2D chart : 
https://www.na-mic.org/wiki/File:VTK-Charts-Histogram2D.png and I didn't 
find the VTK class that allows me to create it. (the original link is : 
https://www.na-mic.org/wiki/2011_Summer_Project_Week_Breakout_Session_VTKCharts). 
Is this chart was removed ? where can I found its source code ?

Currently I am using a vtkImageActor to display a 2-D color map (or 
spectrogram) but I am struggling with the camera and the scale of the 
actor to make it right (to fit the whole window) and I am drawing the 
axis in another QVTKOpenGL widget managing a 2D scene (vtkAxis - like 
the ParaView Slice View). I am not really comfortable with this solution.

I don't want to use APIs like QCustomPlot or Qwt because I will have to 
convert my data to use them and this will add another dependency to my 
program.

I played a little with vtkContextView, vtkContextArea and vtkImageItem 
to display a vtkImageData, but there is no possibility to change the 
color or display a vtkImageData whose point data array has a single 
compnent (it should have 4 components: r,g,b,a).

Thanks.


From sebastien.jourdain at kitware.com  Fri Dec 14 10:20:18 2018
From: sebastien.jourdain at kitware.com (Sebastien Jourdain)
Date: Fri, 14 Dec 2018 08:20:18 -0700
Subject: [vtkusers] vtk.js: display particular cells with
 alpha/transparency/opacity
In-Reply-To: <CACGVHeA377Z4Bygpz7tK9WRs1OTWOU7fcF147GRh5zNQHVg-Rg@mail.gmail.com>
References: <CACGVHeDVGmzrmKr=srVwZgZY2B4jE7DdDv_HRjR=3uyaTGoq6g@mail.gmail.com>
 <CABObKxekZ2bRPf=ZXJHH+h=nW7Q1n9e3bhhPsDa_B98zaDooJg@mail.gmail.com>
 <CACGVHeAysWqG+nxy5tdVmML2u8z4tDypO3ptmBOQY904d3CdTw@mail.gmail.com>
 <CABObKxc2kWxzmDpUYivaNHj1NQL9q7nwSDMSkAJTOtOBc3jGhw@mail.gmail.com>
 <CACGVHeA377Z4Bygpz7tK9WRs1OTWOU7fcF147GRh5zNQHVg-Rg@mail.gmail.com>
Message-ID: <CABObKxcGReDzRtRNksMnciL5RbsQwEn=SFjduu+nq-hJwc94zQ@mail.gmail.com>

Thanks for doing this. Indeed I see the issue and reported a bug here:

https://github.com/Kitware/vtk-js/issues/982

On Fri, Dec 14, 2018 at 3:22 AM Raimonds Vilums <raimonds at cenos-platform.com>
wrote:

> https://codepen.io/raimonds-vilums/pen/OrMrEz
>
> After load, you can see colored cells without transparency (3-component
> array).
>
> For loading 4-component array, change array name on line 187
> from mapper.setColorByArrayName('*rgbData*');
> to mapper.setColorByArrayName('*rgbaData*');
> which does not work.
>
> Raimonds
>
>
> On Thu, Dec 13, 2018 at 6:59 PM Sebastien Jourdain <
> sebastien.jourdain at kitware.com> wrote:
>
>> Can you do a codepen and share it so I can see what you are doing exactly?
>>
>> On Thu, Dec 13, 2018 at 9:26 AM Raimonds Vilums <
>> raimonds at cenos-platform.com> wrote:
>>
>>> I tried and got
>>>
>>> index.js:441 Uncaught (in promise) TypeError: Cannot add property 3,
>>> object is not extensible
>>>     at Object.publicAPI.rGBAToRGBA (index.js:441)
>>>     at Object.publicAPI.convertToRGBA (index.js:487)
>>>     at Object.publicAPI.mapScalars (index.js:238)
>>>     at Object.publicAPI.mapScalars (index.js:272)
>>>
>>>
>>>
>>> On Thu, Dec 13, 2018 at 6:10 PM Sebastien Jourdain <
>>> sebastien.jourdain at kitware.com> wrote:
>>>
>>>> You should be able to have an array with 4 components (RGBA)
>>>>
>>>> On Thu, Dec 13, 2018 at 9:01 AM Raimonds Vilums <
>>>> raimonds at cenos-platform.com> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> Is it possible to display cells with custom opacity for each cell?
>>>>>
>>>>> Till now, I managed
>>>>> 1) set opacity to the actor (e.g., actor.getProperty().setOpacity(0.5)
>>>>> )
>>>>> 2) color cells with solid colors, e.g:
>>>>>
>>>>>
>>>>>    - vtk file contains CELL_DATA array of floats with 3 components
>>>>>    for every color
>>>>>    -
>>>>>
>>>>>    mapper.setColorModeToDirectScalars();
>>>>>
>>>>>    -
>>>>>
>>>>>    mapper.setScalarModeToUseCellFieldData();
>>>>>
>>>>>    -
>>>>>
>>>>>    mapper.setColorByArrayName('my_cell_data');
>>>>>
>>>>>
>>>>> But I could not find a way to set alpha/opacity/transparency for
>>>>> particular cells.
>>>>> Is it possible?
>>>>>
>>>>> Regards,
>>>>> Raimonds
>>>>>
>>>>> _______________________________________________
>>>>> Powered by www.kitware.com
>>>>>
>>>>> Visit other Kitware open-source projects at
>>>>> http://www.kitware.com/opensource/opensource.html
>>>>>
>>>>> Please keep messages on-topic and check the VTK FAQ at:
>>>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>>>
>>>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>>>
>>>>> Follow this link to subscribe/unsubscribe:
>>>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>>>
>>>>
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From andrei.ivanov at phystech.edu  Fri Dec 14 10:54:41 2018
From: andrei.ivanov at phystech.edu (Andrey Ivanov)
Date: Fri, 14 Dec 2018 18:54:41 +0300
Subject: [vtkusers] How to preserve objects size when moving camera
Message-ID: <CALsLM6c3x5TXHCAu8xka=CWKpse5E1Rtg1LR_GkbqjZMd6Qv3Q@mail.gmail.com>

Hello!

I am trying to draw a lot of objects with the same shape for CAD system.
Let it be stars or circles for example.
The number of such circles can be about 1000-10000.
I would like to *preserve their size* when moving the camera, scaling
frustrum and changing distance to objects.

For now I found two approaches:

1. Use vtkDistanceToCamera
An example from
https://lorensen.github.io/VTKExamples/site/Cxx/Visualization/DistanceToCamera/
is great
for low number of objects, however when their numer grows, the interface
starts to freeze due to
rescaling of shapes on each interaction with camera.

2. Use points (squares with width equal to 4 pixels).
It works fast and points size is fixed, but I would like to have more
complex shapes, like triangles and circles.


Is there another approach to solve this problem? It seems that with pure
OpenGL this can be implemented rather efficiently,
so I am looking for a way to do it in VTK.

Best regards,
Andrey Ivanov
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From dave.demarle at kitware.com  Fri Dec 14 11:41:17 2018
From: dave.demarle at kitware.com (David E DeMarle)
Date: Fri, 14 Dec 2018 11:41:17 -0500
Subject: [vtkusers] How to preserve objects size when moving camera
In-Reply-To: <CALsLM6c3x5TXHCAu8xka=CWKpse5E1Rtg1LR_GkbqjZMd6Qv3Q@mail.gmail.com>
References: <CALsLM6c3x5TXHCAu8xka=CWKpse5E1Rtg1LR_GkbqjZMd6Qv3Q@mail.gmail.com>
Message-ID: <CANjZAi8bsvn-DJMMCZ61pvUKeFeVjwpwHYUih2d-MQvmnVQY4Q@mail.gmail.com>

Will turning off perspective do what you want?
https://www.vtk.org/doc/nightly/html/classvtkCamera.html#a5b0e647798e7f45d358d8039ff41b378
void vtkCamera::SetParallelProjection(vtkTypeBool
<https://www.vtk.org/doc/nightly/html/vtkABI_8h.html#a663dee2c85b2a185fb34cb877d5208da>
 flag)

David E DeMarle
Kitware, Inc.
Principal Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909


On Fri, Dec 14, 2018 at 10:55 AM Andrey Ivanov <andrei.ivanov at phystech.edu>
wrote:

> Hello!
>
> I am trying to draw a lot of objects with the same shape for CAD system.
> Let it be stars or circles for example.
> The number of such circles can be about 1000-10000.
> I would like to *preserve their size* when moving the camera, scaling
> frustrum and changing distance to objects.
>
> For now I found two approaches:
>
> 1. Use vtkDistanceToCamera
> An example from
> https://lorensen.github.io/VTKExamples/site/Cxx/Visualization/DistanceToCamera/
> is great
> for low number of objects, however when their numer grows, the interface
> starts to freeze due to
> rescaling of shapes on each interaction with camera.
>
> 2. Use points (squares with width equal to 4 pixels).
> It works fast and points size is fixed, but I would like to have more
> complex shapes, like triangles and circles.
>
>
> Is there another approach to solve this problem? It seems that with pure
> OpenGL this can be implemented rather efficiently,
> so I am looking for a way to do it in VTK.
>
> Best regards,
> Andrey Ivanov
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From andrei.ivanov at phystech.edu  Fri Dec 14 12:07:33 2018
From: andrei.ivanov at phystech.edu (Andrey Ivanov)
Date: Fri, 14 Dec 2018 20:07:33 +0300
Subject: [vtkusers] How to preserve objects size when moving camera
In-Reply-To: <CANjZAi8bsvn-DJMMCZ61pvUKeFeVjwpwHYUih2d-MQvmnVQY4Q@mail.gmail.com>
References: <CALsLM6c3x5TXHCAu8xka=CWKpse5E1Rtg1LR_GkbqjZMd6Qv3Q@mail.gmail.com>
 <CANjZAi8bsvn-DJMMCZ61pvUKeFeVjwpwHYUih2d-MQvmnVQY4Q@mail.gmail.com>
Message-ID: <CALsLM6fQS52h2UYXzqO0L4RDFdezY3EELTCJfOXZ_cze_7VtUQ@mail.gmail.com>

I forgot to mention that I am already working with orthogonal projection.
The problem is not with preserving shapes and avoiding perspective
deformations. I would like to fix screen size of objects, so when I
increase height and width of camera frustum they will occupy the same
number of pixels.

Best regards,
Andrey Ivanov


On Fri, 14 Dec 2018 at 19:41, David E DeMarle <dave.demarle at kitware.com>
wrote:

> Will turning off perspective do what you want?
>
> https://www.vtk.org/doc/nightly/html/classvtkCamera.html#a5b0e647798e7f45d358d8039ff41b378
> void vtkCamera::SetParallelProjection(vtkTypeBool
> <https://www.vtk.org/doc/nightly/html/vtkABI_8h.html#a663dee2c85b2a185fb34cb877d5208da>
>  flag)
>
> David E DeMarle
> Kitware, Inc.
> Principal Engineer
> 21 Corporate Drive
> Clifton Park, NY 12065-8662
> Phone: 518-881-4909
>
>
> On Fri, Dec 14, 2018 at 10:55 AM Andrey Ivanov <andrei.ivanov at phystech.edu>
> wrote:
>
>> Hello!
>>
>> I am trying to draw a lot of objects with the same shape for CAD system.
>> Let it be stars or circles for example.
>> The number of such circles can be about 1000-10000.
>> I would like to *preserve their size* when moving the camera, scaling
>> frustrum and changing distance to objects.
>>
>> For now I found two approaches:
>>
>> 1. Use vtkDistanceToCamera
>> An example from
>> https://lorensen.github.io/VTKExamples/site/Cxx/Visualization/DistanceToCamera/
>> is great
>> for low number of objects, however when their numer grows, the interface
>> starts to freeze due to
>> rescaling of shapes on each interaction with camera.
>>
>> 2. Use points (squares with width equal to 4 pixels).
>> It works fast and points size is fixed, but I would like to have more
>> complex shapes, like triangles and circles.
>>
>>
>> Is there another approach to solve this problem? It seems that with pure
>> OpenGL this can be implemented rather efficiently,
>> so I am looking for a way to do it in VTK.
>>
>> Best regards,
>> Andrey Ivanov
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at
>> http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at:
>> http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>
>> Follow this link to subscribe/unsubscribe:
>> https://public.kitware.com/mailman/listinfo/vtkusers
>>
>
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From aron.helser at kitware.com  Fri Dec 14 14:25:56 2018
From: aron.helser at kitware.com (Aron Helser)
Date: Fri, 14 Dec 2018 14:25:56 -0500
Subject: [vtkusers] How to preserve objects size when moving camera
In-Reply-To: <CALsLM6fQS52h2UYXzqO0L4RDFdezY3EELTCJfOXZ_cze_7VtUQ@mail.gmail.com>
References: <CALsLM6c3x5TXHCAu8xka=CWKpse5E1Rtg1LR_GkbqjZMd6Qv3Q@mail.gmail.com>
 <CANjZAi8bsvn-DJMMCZ61pvUKeFeVjwpwHYUih2d-MQvmnVQY4Q@mail.gmail.com>
 <CALsLM6fQS52h2UYXzqO0L4RDFdezY3EELTCJfOXZ_cze_7VtUQ@mail.gmail.com>
Message-ID: <CAF2skS5UNANw9vjm-i55oT1G_3BL4QR6j1JpMPZYCYj9cgz+kg@mail.gmail.com>

You could probably do what you want by drawing points using a custom shader
to create different shapes.
Something like this:
https://stackoverflow.com/questions/27098315/render-large-circular-points-in-modern-opengl
I'm not sure how to do this in VTK, however.

On Fri, Dec 14, 2018 at 12:08 PM Andrey Ivanov <andrei.ivanov at phystech.edu>
wrote:

> I forgot to mention that I am already working with orthogonal projection.
> The problem is not with preserving shapes and avoiding perspective
> deformations. I would like to fix screen size of objects, so when I
> increase height and width of camera frustum they will occupy the same
> number of pixels.
>
> Best regards,
> Andrey Ivanov
>
>
> On Fri, 14 Dec 2018 at 19:41, David E DeMarle <dave.demarle at kitware.com>
> wrote:
>
>> Will turning off perspective do what you want?
>>
>> https://www.vtk.org/doc/nightly/html/classvtkCamera.html#a5b0e647798e7f45d358d8039ff41b378
>> void vtkCamera::SetParallelProjection(vtkTypeBool
>> <https://www.vtk.org/doc/nightly/html/vtkABI_8h.html#a663dee2c85b2a185fb34cb877d5208da>
>>  flag)
>>
>> David E DeMarle
>> Kitware, Inc.
>> Principal Engineer
>> 21 Corporate Drive
>> Clifton Park, NY 12065-8662
>> Phone: 518-881-4909
>>
>>
>> On Fri, Dec 14, 2018 at 10:55 AM Andrey Ivanov <
>> andrei.ivanov at phystech.edu> wrote:
>>
>>> Hello!
>>>
>>> I am trying to draw a lot of objects with the same shape for CAD system.
>>> Let it be stars or circles for example.
>>> The number of such circles can be about 1000-10000.
>>> I would like to *preserve their size* when moving the camera, scaling
>>> frustrum and changing distance to objects.
>>>
>>> For now I found two approaches:
>>>
>>> 1. Use vtkDistanceToCamera
>>> An example from
>>> https://lorensen.github.io/VTKExamples/site/Cxx/Visualization/DistanceToCamera/
>>> is great
>>> for low number of objects, however when their numer grows, the interface
>>> starts to freeze due to
>>> rescaling of shapes on each interaction with camera.
>>>
>>> 2. Use points (squares with width equal to 4 pixels).
>>> It works fast and points size is fixed, but I would like to have more
>>> complex shapes, like triangles and circles.
>>>
>>>
>>> Is there another approach to solve this problem? It seems that with pure
>>> OpenGL this can be implemented rather efficiently,
>>> so I am looking for a way to do it in VTK.
>>>
>>> Best regards,
>>> Andrey Ivanov
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>
>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> https://public.kitware.com/mailman/listinfo/vtkusers
>>>
>> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers
>
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From bill.lorensen at gmail.com  Fri Dec 14 18:32:16 2018
From: bill.lorensen at gmail.com (Bill Lorensen)
Date: Fri, 14 Dec 2018 15:32:16 -0800
Subject: [vtkusers] ANN: VTK Examples Project reaches 1000 C++ Examples
Message-ID: <CADZJ4hO1Va3nM=pNLSvQ-4f8nQ2X-mP9tAscH7RPDEqfguHf4Q@mail.gmail.com>

Folks,

We have reached a milestone in the VTK Examples Project
(https://lorensen.github.io/VTKExamples/site/). There are now 1000 C++
examples (https://lorensen.github.io/VTKExamples/site/Cxx/).  The
total number of examples is now almost 1500 with  1000 C++ examples,
121  CSharp examples (https://lorensen.github.io/VTKExamples/site/CSharp/),
290 Python examples (https://lorensen.github.io/VTKExamples/site/Python/), and
41 Java examples (https://lorensen.github.io/VTKExamples/site/Java/).

The number of Java examples is expanding thanks to our new contributor
Bharatesh Chakravarthi from the VE Lab, Chung Ang University, Seoul,
South Korea.  Bharatesh has quickly learned our example contribution
process and has added over 20 examples. We expect to see many more
Java examples in the coming months. We are always looking to new
contributors (https://lorensen.github.io/VTKExamples/site/Instructions/ForDevelopers/.

As a reminder, the VTK Example Project also hosts a latex version and
markdown version of the VTK Textbook. The latex version is an improved
version of the current VTK Textbook
(https://raw.githubusercontent.com/lorensen/VTKExamples/master/src/VTKBookLaTeX/VTKTextBook.pdf).
The markdown version is an interactive, platform friendly version of
the book (https://lorensen.github.io/VTKExamples/site/VTKBook/00Preface/).


-- 
Unpaid intern in BillsParadise at noware dot com

From rccm.kyoshimi at gmail.com  Sat Dec 15 01:14:29 2018
From: rccm.kyoshimi at gmail.com (kenichiro yoshimi)
Date: Sat, 15 Dec 2018 15:14:29 +0900
Subject: [vtkusers] 2D Histogram (or spectrogram) chart
In-Reply-To: <0c0e73f3-190a-8826-e801-22a34adf4759@febus-optics.com>
References: <0c0e73f3-190a-8826-e801-22a34adf4759@febus-optics.com>
Message-ID: <CAHDyfPAYtEut_Gve_gk5LJ06a=fN7BBN4Czx+7r6TXsDA0QtAA@mail.gmail.com>

Hi,

I had a look at this test which you were just looking for:
https://github.com/Kitware/VTK/blob/master/Charts/Core/Testing/Cxx/TestHistogram2D.cxx

Best,

2018?12?14?(?) 23:57 Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com>:
>
> Hello,
>
> I've seen this screenshot of a 2D chart :
> https://www.na-mic.org/wiki/File:VTK-Charts-Histogram2D.png and I didn't
> find the VTK class that allows me to create it. (the original link is :
> https://www.na-mic.org/wiki/2011_Summer_Project_Week_Breakout_Session_VTKCharts).
> Is this chart was removed ? where can I found its source code ?
>
> Currently I am using a vtkImageActor to display a 2-D color map (or
> spectrogram) but I am struggling with the camera and the scale of the
> actor to make it right (to fit the whole window) and I am drawing the
> axis in another QVTKOpenGL widget managing a 2D scene (vtkAxis - like
> the ParaView Slice View). I am not really comfortable with this solution.
>
> I don't want to use APIs like QCustomPlot or Qwt because I will have to
> convert my data to use them and this will add another dependency to my
> program.
>
> I played a little with vtkContextView, vtkContextArea and vtkImageItem
> to display a vtkImageData, but there is no possibility to change the
> color or display a vtkImageData whose point data array has a single
> compnent (it should have 4 components: r,g,b,a).
>
> Thanks.
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://public.kitware.com/mailman/listinfo/vtkusers

From mozendi at gmail.com  Sat Dec 15 15:02:58 2018
From: mozendi at gmail.com (mozendi)
Date: Sat, 15 Dec 2018 13:02:58 -0700 (MST)
Subject: [vtkusers] Visualizing normal vectors
Message-ID: <1544904178474-0.post@n5.nabble.com>

I have some point cloud files in .xyz format. Each of these files contain
approximately 1million points and corresponding normal vectors for each
point. Each line of .xyz files belongs to one point and each line contains
cartesian coordinates (x,y, and z) and normal vetor (nx,ny, and nz). My
objective is to show points and their normal vectors. I can read .xyz files
successfully and show points successfully. However, I can not show normal
vectors successfully. I tried to solve the problem using vtkGlyph3D class as
shown in some examples of Kitware but every attempt was failure for me. My
code is shown below. 
Could you please help me about solving this problem? I am looking forward to
hearing from you. Thanks in advance.

#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkDelimitedTextReader.h>
#include <vtkDoubleArray.h>
#include <vtkTable.h>
#include <vtkPointData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkVertexGlyphFilter.h>

int main(int argc, char* argv[])
{
    vtkSmartPointer<vtkDelimitedTextReader> reader =
vtkSmartPointer<vtkDelimitedTextReader>::New();
    reader->SetFileName("points_and_normals.xyz");
    reader->DetectNumericColumnsOn();
    reader->SetFieldDelimiterCharacters(" ");
    reader->Update();

    vtkTable* table = reader->GetOutput();
    vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
    vtkSmartPointer<vtkDoubleArray> normals =
vtkSmartPointer<vtkDoubleArray>::New();
    normals->SetNumberOfComponents(3); //3d normals (ie x,y,z)

    std::cout << "Table has " << table->GetNumberOfRows()
            << " rows." << std::endl;
    std::cout << "Table has " << table->GetNumberOfColumns()
            << " columns." << std::endl;

    for (vtkIdType i = 0; i < table->GetNumberOfRows(); i++)
    {

            points->InsertNextPoint((table->GetValue(i, 0)).ToDouble(),
                    (table->GetValue(i, 1)).ToDouble(),
                    (table->GetValue(i, 2)).ToDouble());

            double n[3];
            n[0] = (table->GetValue(i, 3)).ToDouble();
            n[1] = (table->GetValue(i, 4)).ToDouble();
            n[2] = (table->GetValue(i, 5)).ToDouble();
            normals->InsertNextTuple(n);
    }

    std::cout << "There are " << points->GetNumberOfPoints()
            << " points." << std::endl;

    vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
    polydata->SetPoints(points);
    polydata->GetPointData()->SetNormals(normals);
    vtkSmartPointer<vtkVertexGlyphFilter> glyphFilter =
vtkSmartPointer<vtkVertexGlyphFilter>::New();
#if VTK_MAJOR_VERSION <= 5
        glyphFilter->SetInputConnection(polydata->GetProducerPort());
#else
        glyphFilter->SetInputData(polydata);
#endif
    glyphFilter->Update();
    // Visualize
    vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
    mapper->SetInputConnection(glyphFilter->GetOutputPort());
    vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
    actor->SetMapper(mapper);
    actor->GetProperty()->SetPointSize(3);
    actor->GetProperty()->SetColor(0, 0, 1);
    vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
    vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
    renderWindow->AddRenderer(renderer);
    vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
    renderWindowInteractor->SetRenderWindow(renderWindow);
    renderer->AddActor(actor);
    renderer->SetBackground(.5, .5, .5);
    renderWindow->Render();
    renderWindowInteractor->Start();
    return EXIT_SUCCESS;
} 



--
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From mozendi at gmail.com  Sat Dec 15 14:41:14 2018
From: mozendi at gmail.com (mozendi)
Date: Sat, 15 Dec 2018 12:41:14 -0700 (MST)
Subject: [vtkusers] Visualizing normal vectors
Message-ID: <1544902874348-0.post@n5.nabble.com>

Dear VTK Users,

I have some point cloud files in .xyz format. Each of these files contain
approximately 1million points and corresponding normal vectors for each
point. Each line of .xyz files belongs to one point and each line contains
cartesian coordinates (x,y, and z) and normal vetor (nx,ny, and nz). My
objective is to show points and their normal vectors. I can read .xyz files
successfully and show points successfully. However, I can not show normal
vectors successfully. 
I tried to solve the problem using vtkGlyph3D class as shown in some
examples of Kitware but every attempt was failure for me. My code is shown
below. 
Could you please help me about solving this problem? I am looking forward to
hearing from you.
Thanks in advance

#include <vtkVersion.h>

#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkDelimitedTextReader.h>
#include <vtkDoubleArray.h>
#include <vtkTable.h>
#include <vtkPointData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkVertexGlyphFilter.h>

int main(int argc, char* argv[])
{

	vtkSmartPointer<vtkDelimitedTextReader> reader =
vtkSmartPointer<vtkDelimitedTextReader>::New();
	reader->SetFileName("points_and_normals.xyz");
	reader->DetectNumericColumnsOn();
	reader->SetFieldDelimiterCharacters(" ");
	reader->Update();

	vtkTable* table = reader->GetOutput();
	vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
	vtkSmartPointer<vtkDoubleArray> normals =
vtkSmartPointer<vtkDoubleArray>::New();
	normals->SetNumberOfComponents(3); //3d normals (ie x,y,z)

	std::cout << "Table has " << table->GetNumberOfRows()
		<< " rows." << std::endl;
	std::cout << "Table has " << table->GetNumberOfColumns()
		<< " columns." << std::endl;

	for (vtkIdType i = 0; i < table->GetNumberOfRows(); i++)
	{
		
		points->InsertNextPoint((table->GetValue(i, 0)).ToDouble(),
			(table->GetValue(i, 1)).ToDouble(),
			(table->GetValue(i, 2)).ToDouble());

		double n[3];
		n[0] = (table->GetValue(i, 3)).ToDouble();
		n[1] = (table->GetValue(i, 4)).ToDouble();
		n[2] = (table->GetValue(i, 5)).ToDouble();
		normals->InsertNextTuple(n);
	}

	std::cout << "There are " << points->GetNumberOfPoints()
		<< " points." << std::endl;

	vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
	polydata->SetPoints(points);
	polydata->GetPointData()->SetNormals(normals);
	vtkSmartPointer<vtkVertexGlyphFilter> glyphFilter =
vtkSmartPointer<vtkVertexGlyphFilter>::New();
#if VTK_MAJOR_VERSION <= 5
	glyphFilter->SetInputConnection(polydata->GetProducerPort());
#else
	glyphFilter->SetInputData(polydata);
#endif
	glyphFilter->Update();
	// Visualize
	vtkSmartPointer<vtkPolyDataMapper> mapper =
vtkSmartPointer<vtkPolyDataMapper>::New();
	mapper->SetInputConnection(glyphFilter->GetOutputPort());
	vtkSmartPointer<vtkActor> actor = vtkSmartPointer<vtkActor>::New();
	actor->SetMapper(mapper);
	actor->GetProperty()->SetPointSize(3);
	actor->GetProperty()->SetColor(0, 0, 1);
	vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
	renderWindow->AddRenderer(renderer);
	vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
	renderWindowInteractor->SetRenderWindow(renderWindow);
	renderer->AddActor(actor);
	renderer->SetBackground(.5, .5, .5); 
	renderWindow->Render();
	renderWindowInteractor->Start();
	return EXIT_SUCCESS;
}



--
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From aminemzoughi at febus-optics.com  Mon Dec 17 04:12:27 2018
From: aminemzoughi at febus-optics.com (Mohamed Amine Mzoughi)
Date: Mon, 17 Dec 2018 10:12:27 +0100
Subject: [vtkusers] 2D Histogram (or spectrogram) chart
In-Reply-To: <CAHDyfPAYtEut_Gve_gk5LJ06a=fN7BBN4Czx+7r6TXsDA0QtAA@mail.gmail.com>
References: <0c0e73f3-190a-8826-e801-22a34adf4759@febus-optics.com>
 <CAHDyfPAYtEut_Gve_gk5LJ06a=fN7BBN4Czx+7r6TXsDA0QtAA@mail.gmail.com>
Message-ID: <7dd3a10b-155a-4e1c-0272-9e1593e64400@febus-optics.com>

Hello,

Thank you very much sir, this is what I am looking for ! Handling a 2D 
color map (spectrogram) in a 3D space is very messy.

I don't know why they chose the name "histogram" for this VTK chart and 
why it isn't popular (It is not used in ParaView, and "histogram" isn't 
the chart with bars used in image processing ?).

I hope this chart will allow me to display a waterfall in a 
not-too-disgusting way//. In a 3D space, I'm modifiying the camera 
parameters to show the waterfall effect.

However, in the test example, I commented these lines :

//chart->MouseButtonPressEvent(mouseEvent);
//chart->MouseButtonReleaseEvent(mouseEvent); // segfault

As, in "vtkIdType vtkPlotHistogram2D::GetNearestPoint(const vtkVector2f& 
point, const vtkVector2f& tolerance, vtkVector2f* location)"

the member "Input" (vtkSmartPointer<vtkImageData>) is not checked 
against nullptr.

Best regards.

Le 15/12/2018 ? 07:14, kenichiro yoshimi a ?crit?:
> Hi,
>
> I had a look at this test which you were just looking for:
> https://github.com/Kitware/VTK/blob/master/Charts/Core/Testing/Cxx/TestHistogram2D.cxx
>
> Best,
>
> 2018?12?14?(?) 23:57 Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com>:
>> Hello,
>>
>> I've seen this screenshot of a 2D chart :
>> https://www.na-mic.org/wiki/File:VTK-Charts-Histogram2D.png and I didn't
>> find the VTK class that allows me to create it. (the original link is :
>> https://www.na-mic.org/wiki/2011_Summer_Project_Week_Breakout_Session_VTKCharts).
>> Is this chart was removed ? where can I found its source code ?
>>
>> Currently I am using a vtkImageActor to display a 2-D color map (or
>> spectrogram) but I am struggling with the camera and the scale of the
>> actor to make it right (to fit the whole window) and I am drawing the
>> axis in another QVTKOpenGL widget managing a 2D scene (vtkAxis - like
>> the ParaView Slice View). I am not really comfortable with this solution.
>>
>> I don't want to use APIs like QCustomPlot or Qwt because I will have to
>> convert my data to use them and this will add another dependency to my
>> program.
>>
>> I played a little with vtkContextView, vtkContextArea and vtkImageItem
>> to display a vtkImageData, but there is no possibility to change the
>> color or display a vtkImageData whose point data array has a single
>> compnent (it should have 4 components: r,g,b,a).
>>
>> Thanks.
>>
>> _______________________________________________
>> Powered by www.kitware.com
>>
>> Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html
>>
>> Please keep messages on-topic and check the VTK FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
>>
>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>
>> Follow this link to subscribe/unsubscribe:
>> https://public.kitware.com/mailman/listinfo/vtkusers

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From patricio.sandana at synopsys.com  Mon Dec 17 05:17:22 2018
From: patricio.sandana at synopsys.com (Pato Sandana)
Date: Mon, 17 Dec 2018 10:17:22 +0000
Subject: [vtkusers] How to preserve objects size when moving camera
Message-ID: <4A2A9A281AE5D54CA205FB13069FD874019181F31B@us01wembx1.internal.synopsys.com>

Hi Andrey,

What I would do in your case, is to have two renderers and two cameras. One renderer with a fixed camera with all your circles and polygons you want to preserve in your screen and another to deal with the 3D world objects. You can attach more than one renderer to the Render Window.

Cheers,
Pato

Message: 1
Date: Fri, 14 Dec 2018 20:07:33 +0300
From: Andrey Ivanov <andrei.ivanov at phystech.edu>
To: David E DeMarle <dave.demarle at kitware.com>
Cc: vtkusers at public.kitware.com
Subject: Re: [vtkusers] How to preserve objects size when moving
	camera
Message-ID:
	<CALsLM6fQS52h2UYXzqO0L4RDFdezY3EELTCJfOXZ_cze_7VtUQ at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

I forgot to mention that I am already working with orthogonal projection.
The problem is not with preserving shapes and avoiding perspective deformations. I would like to fix screen size of objects, so when I increase height and width of camera frustum they will occupy the same number of pixels.

Best regards,
Andrey Ivanov


From sebastien.jourdain at kitware.com  Mon Dec 17 13:07:28 2018
From: sebastien.jourdain at kitware.com (Sebastien Jourdain)
Date: Mon, 17 Dec 2018 13:07:28 -0500
Subject: [vtkusers] Sebastien Jourdain: Invoice #IN-6ZS6670045
Message-ID: <3067893280894216917.E118AF8AE3C7A8C5@vtk.org>

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From brad.king at kitware.com  Mon Dec 17 14:36:28 2018
From: brad.king at kitware.com (Brad King)
Date: Mon, 17 Dec 2018 16:36:28 -0300
Subject: [vtkusers] Christmas eCard
Message-ID: <2039558065210719444.3FC5188FAC9E0611@vtk.org>

Dear, 


May the joy and peace of Christmas be with you all through the Year. Wishing you a season of blessings from heaven above.


Here?s wishing you a Merry Christmas!

Christmas eCard below.


Brad King
Tel # 963-889-2890
Fax # 963-889-2822

brad.king at kitware.com


God bless you and utterly satisfy your heart?with Himself. Amy Carmichael
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From bill.lorensen at gmail.com  Mon Dec 17 18:38:40 2018
From: bill.lorensen at gmail.com (Bill Lorensen)
Date: Mon, 17 Dec 2018 15:38:40 -0800
Subject: [vtkusers] Help with vtkInterpolateDataSetAttributes
In-Reply-To: <FF93B256-1375-4B12-88D3-23EB4A147568@inl.gov>
References: <F948DFBF-F7DD-488E-ADE4-3C3326A834C3@inl.gov>
 <CADZJ4hMhJs=sH2FVhq=djKJ-6awNMETkLbxyuyAxyrjUhwGVvw@mail.gmail.com>
 <01535852-F548-4E8A-A2AF-04F7F4476DEB@inl.gov>
 <CADZJ4hPh=WaA8K_tmtrwWoq9UgffO3ka2uXdBBAYwc6QBC0GXA@mail.gmail.com>
 <A5F3F629-4ABE-4694-9471-0F1472F57D4F@inl.gov>
 <FF93B256-1375-4B12-88D3-23EB4A147568@inl.gov>
Message-ID: <CADZJ4hPKy+d_QN4FVKpHpv9kwmeEydcrdDp0GrX3RZBXGoiTug@mail.gmail.com>

Andrew, please post further comments to the mailing list.

On Mon, Dec 17, 2018, 2:07 PM Andrew E. Slaughter <andrew.slaughter at inl.gov
wrote:

> The interpolation for point data is working great, I am working on making
> my script more robust before posting by including cell and global data to
> the interpolation. I also am interpolating all active data into a
> vtkMultiBlockDataSetAlgorithm so the end product will behave similarly as a
> vtkExodusIIReader object.
>
> Anyway, I can't get the cell data to interpolate. The point data is
> working fine (change the variable to 'point') to show this result.
>
> I was hoping you could take a look and see what I am missing, I images it
> is something to do with the vtkPointInterpolator, but I can't seem to find
> the solution.
>
> Thanks,
> Andrew
>
>
> ?On 12/10/18, 8:46 AM, "Andrew E. Slaughter" <andrew.slaughter at inl.gov>
> wrote:
>
>     Feel free to add this an example with the data, when I get the python
> version fixed up I will add it to the examples wiki as well.
>
>     Thank you for your help.
>
>     - Andrew
>
>     On 12/5/18, 5:20 PM, "Bill Lorensen" <bill.lorensen at gmail.com> wrote:
>
>         I found the problems with your script.
>
>         vtkPointInterpolator: The point arrays will not be interpolated
> unless
>         PassPointArrays is off. And the source and input data must add the
>         field data as the active scalar.
>         vtkInterpolateDataSetAttibutes does not interpolate field data. To
>         interpolate field data each input must add the field data as the
>         active scalar.
>
>         Neither of these are obvious. I have attached a c++ example that is
>         based on your script. I changed a lot of the names to help me debug
>         the problems.
>
>         I would like to ass this c++ code as an example, once I make a few
>         more changes. Is that OK with you? I would also need to add your
>         datasets.
>
>         Bill
>         On Tue, Dec 4, 2018 at 3:40 PM Andrew E. Slaughter
>         <andrew.slaughter at inl.gov> wrote:
>         >
>         > Thank you, feel free to email me directly if you need anything
> more from my end.
>         >
>         >
>         >
>         > From: Bill Lorensen <bill.lorensen at gmail.com>
>         > Date: Monday, December 3, 2018 at 7:20 PM
>         > To: "Andrew E. Slaughter" <andrew.slaughter at inl.gov>
>         > Cc: VTK Users <vtkusers at vtk.org>
>         > Subject: Re: [vtkusers] Help with vtkInterpolateDataSetAttributes
>         >
>         >
>         >
>         > I suspect that vtkInterpolateDataSetAttributes may be buggy. The
> are no tests that interpolate scalar data. I'm looking into it.
>         >
>         >
>         >
>         > On Thu, Nov 29, 2018, 8:13 AM Andrew E. Slaughter via vtkusers <
> vtkusers at public.kitware.com wrote:
>         >
>         > I am attempting to interpolate between two ExodusII
> (vtkExodusIIReader) results using the vtkInterpolateDataSetAttributes, but
> am having trouble getting it to work. I was able to perform an
> interpolation that mimics the behavior with calls to
> vtkAbstractArray::InterpolateTuple, but this doesn?t seem like the correct
> solution.
>         >
>         >
>         >
>         > I have attached a script that show what I am trying to do,
> including what is working and what is not. I know that for this problem I
> could use vtkTemporalInterpolator, but for the actual problem I am trying
> to solve it isn?t appropriate. I am using python bindings with VTK7.1 on
> MacOS.
>         >
>         >
>         >
>         > I would appreciate any help I can get making this work.
>         >
>         >
>         >
>         > Thanks,
>         >
>         > Andrew
>         >
>         >
>         >
>         >
>         >
>         > _______________________________________________
>         > Powered by www.kitware.com
>         >
>         > Visit other Kitware open-source projects at
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.kitware.com_opensource_opensource.html&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=CZ-fngNdgJgN52g8AviZCojUB3AwTUttziM040_wM1g&s=E2eeqfO0l7aGQzYt_-DT6zLV6ALe0sCfFm6z4kfA2vE&e=
>         >
>         > Please keep messages on-topic and check the VTK FAQ at:
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.vtk.org_Wiki_VTK-5FFAQ&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=CZ-fngNdgJgN52g8AviZCojUB3AwTUttziM040_wM1g&s=cZQZE8xkatSI9xZ8-19BijAzdZZhpEzqBD5JiCsyQZk&e=
>         >
>         > Search the list archives at:
> https://urldefense.proofpoint.com/v2/url?u=http-3A__markmail.org_search_-3Fq-3Dvtkusers&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=CZ-fngNdgJgN52g8AviZCojUB3AwTUttziM040_wM1g&s=4EuYM4upr3Tp4Rakv_UjS9KZk1TyOLER92KgxprLfv4&e=
>         >
>         > Follow this link to subscribe/unsubscribe:
>         >
> https://urldefense.proofpoint.com/v2/url?u=https-3A__public.kitware.com_mailman_listinfo_vtkusers&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=CZ-fngNdgJgN52g8AviZCojUB3AwTUttziM040_wM1g&s=smX4duzcBydAraDbmtpSZRONXDLCSc4MycG_F_Jw5I0&e=
>
>
>
>         --
>         Unpaid intern in BillsParadise at noware dot com
>
>
>
>
>
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From andrew.slaughter at inl.gov  Mon Dec 17 18:43:28 2018
From: andrew.slaughter at inl.gov (Andrew E. Slaughter)
Date: Mon, 17 Dec 2018 23:43:28 +0000
Subject: [vtkusers] Help with vtkInterpolateDataSetAttributes
In-Reply-To: <CADZJ4hPh=WaA8K_tmtrwWoq9UgffO3ka2uXdBBAYwc6QBC0GXA@mail.gmail.com>
References: <F948DFBF-F7DD-488E-ADE4-3C3326A834C3@inl.gov>
 <CADZJ4hMhJs=sH2FVhq=djKJ-6awNMETkLbxyuyAxyrjUhwGVvw@mail.gmail.com>
 <01535852-F548-4E8A-A2AF-04F7F4476DEB@inl.gov>
 <CADZJ4hPh=WaA8K_tmtrwWoq9UgffO3ka2uXdBBAYwc6QBC0GXA@mail.gmail.com>
Message-ID: <D9709FED-CD5A-454A-BFFE-E689430B194A@inl.gov>

The interpolation for point data is working great, I am working on making my script more robust before posting by including cell and global data to the interpolation. I also am interpolating all active data into a vtkMultiBlockDataSetAlgorithm so the end product will behave similarly as a vtkExodusIIReader object.

Anyway, I can't get the cell data to interpolate. The point data is working fine (change the variable to 'point') to show this result.

I was hoping you could take a look and see what I am missing, I images it is something to do with the vtkPointInterpolator, but I can't seem to find the solution.

Thanks,
Andrew

?On 12/5/18, 5:20 PM, "Bill Lorensen" <bill.lorensen at gmail.com> wrote:

    I found the problems with your script.
    
    vtkPointInterpolator: The point arrays will not be interpolated unless
    PassPointArrays is off. And the source and input data must add the
    field data as the active scalar.
    vtkInterpolateDataSetAttibutes does not interpolate field data. To
    interpolate field data each input must add the field data as the
    active scalar.
    
    Neither of these are obvious. I have attached a c++ example that is
    based on your script. I changed a lot of the names to help me debug
    the problems.
    
    I would like to ass this c++ code as an example, once I make a few
    more changes. Is that OK with you? I would also need to add your
    datasets.
    
    Bill
    On Tue, Dec 4, 2018 at 3:40 PM Andrew E. Slaughter
    <andrew.slaughter at inl.gov> wrote:
    >
    > Thank you, feel free to email me directly if you need anything more from my end.
    >
    >
    >
    > From: Bill Lorensen <bill.lorensen at gmail.com>
    > Date: Monday, December 3, 2018 at 7:20 PM
    > To: "Andrew E. Slaughter" <andrew.slaughter at inl.gov>
    > Cc: VTK Users <vtkusers at vtk.org>
    > Subject: Re: [vtkusers] Help with vtkInterpolateDataSetAttributes
    >
    >
    >
    > I suspect that vtkInterpolateDataSetAttributes may be buggy. The are no tests that interpolate scalar data. I'm looking into it.
    >
    >
    >
    > On Thu, Nov 29, 2018, 8:13 AM Andrew E. Slaughter via vtkusers <vtkusers at public.kitware.com wrote:
    >
    > I am attempting to interpolate between two ExodusII (vtkExodusIIReader) results using the vtkInterpolateDataSetAttributes, but am having trouble getting it to work. I was able to perform an interpolation that mimics the behavior with calls to vtkAbstractArray::InterpolateTuple, but this doesn?t seem like the correct solution.
    >
    >
    >
    > I have attached a script that show what I am trying to do, including what is working and what is not. I know that for this problem I could use vtkTemporalInterpolator, but for the actual problem I am trying to solve it isn?t appropriate. I am using python bindings with VTK7.1 on MacOS.
    >
    >
    >
    > I would appreciate any help I can get making this work.
    >
    >
    >
    > Thanks,
    >
    > Andrew
    >
    >
    >
    >
    >
    > _______________________________________________
    > Powered by www.kitware.com
    >
    > Visit other Kitware open-source projects at https://urldefense.proofpoint.com/v2/url?u=http-3A__www.kitware.com_opensource_opensource.html&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=CZ-fngNdgJgN52g8AviZCojUB3AwTUttziM040_wM1g&s=E2eeqfO0l7aGQzYt_-DT6zLV6ALe0sCfFm6z4kfA2vE&e=
    >
    > Please keep messages on-topic and check the VTK FAQ at: https://urldefense.proofpoint.com/v2/url?u=http-3A__www.vtk.org_Wiki_VTK-5FFAQ&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=CZ-fngNdgJgN52g8AviZCojUB3AwTUttziM040_wM1g&s=cZQZE8xkatSI9xZ8-19BijAzdZZhpEzqBD5JiCsyQZk&e=
    >
    > Search the list archives at: https://urldefense.proofpoint.com/v2/url?u=http-3A__markmail.org_search_-3Fq-3Dvtkusers&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=CZ-fngNdgJgN52g8AviZCojUB3AwTUttziM040_wM1g&s=4EuYM4upr3Tp4Rakv_UjS9KZk1TyOLER92KgxprLfv4&e=
    >
    > Follow this link to subscribe/unsubscribe:
    > https://urldefense.proofpoint.com/v2/url?u=https-3A__public.kitware.com_mailman_listinfo_vtkusers&d=DwIFaQ&c=54IZrppPQZKX9mLzcGdPfFD1hxrcB__aEkJFOKJFd00&r=h7heP8xwI1i_HikChvhFbEBurKirgfOCdwgBxB9lM8c&m=CZ-fngNdgJgN52g8AviZCojUB3AwTUttziM040_wM1g&s=smX4duzcBydAraDbmtpSZRONXDLCSc4MycG_F_Jw5I0&e=
    
    
    
    -- 
    Unpaid intern in BillsParadise at noware dot com
    

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From tharun160190 at gmail.com  Tue Dec 18 04:48:57 2018
From: tharun160190 at gmail.com (Tharun)
Date: Tue, 18 Dec 2018 02:48:57 -0700 (MST)
Subject: [vtkusers] can different texture be pasted on back and front
 face of a plane?
In-Reply-To: <960032.1489.qm@web45115.mail.sp1.yahoo.com>
References: <960032.1489.qm@web45115.mail.sp1.yahoo.com>
Message-ID: <1545126537789-0.post@n5.nabble.com>

Is this possible?



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From gdeee at web.de  Tue Dec 18 07:14:41 2018
From: gdeee at web.de (gdeee)
Date: Tue, 18 Dec 2018 13:14:41 +0100
Subject: [vtkusers] vtkChartXY - axis with equal aspect ration
Message-ID: <b2b370c0-c197-609d-c422-79d1d6efefa3@web.de>

Hello,

I have a simple plot that uses a vtkChartXY like in this example:

https://www.vtk.org/Wiki/VTK/Examples/Cxx/Plotting/ScatterPlot

How can I set the aspect ratio of the axis to be fixed?
What I want to reach is that, when I draw a circle for example, it stays
a circle and not an elipse when the size of the rendererwindow is changed.

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From 523480317 at qq.com  Tue Dec 18 10:53:10 2018
From: 523480317 at qq.com (=?ISO-8859-1?B?eWlydWkxMjEw?=)
Date: Tue, 18 Dec 2018 23:53:10 +0800
Subject: [vtkusers] vtkFFMPEGWriter has a fixed frame rate?
Message-ID: <tencent_1C7E9148737A29BEF06D8FAEEF3F1F3DA607@qq.com>

Hello,


I am using vtkFFMPEGWriter to write a video, no matter the frame rate I set, the output video is still 600 frames/sec. 

The code I used has been attached. Can anybody check the problem for me? Thank you so much.


Regards,
Rui
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From aminemzoughi at febus-optics.com  Tue Dec 18 09:54:46 2018
From: aminemzoughi at febus-optics.com (Mohamed Amine Mzoughi)
Date: Tue, 18 Dec 2018 15:54:46 +0100
Subject: [vtkusers] questions about vtkChartXY
Message-ID: <0447551a-c0d3-cc90-0b21-1a96bbe2b3a7@febus-optics.com>

Hello,

How to prevent axes from rescaling (losing zoom level) when changing the 
input ? By changing the input I mean clearing the current plot 
(ClearPlots) and adding a new plot (with a fresh vtkTable).

How to enable antialisaing ? I tried this before rendering :

 ??? m_view->GetRenderWindow()->LineSmoothingOn();
 ??? m_view->GetRenderWindow()->PolygonSmoothingOn();
 ??? m_view->GetRenderWindow()->PointSmoothingOn();

but it doesn't work.

Otherwise, in ParaView, I noticed that "LineChartView" ranges are not 
changed when filter's output is updated and that the antialiasing is 
working (this last is only lost when we exit full screen mode - F11).

Best regards.


From ochampao at hotmail.com  Tue Dec 18 13:40:46 2018
From: ochampao at hotmail.com (ochampao)
Date: Tue, 18 Dec 2018 11:40:46 -0700 (MST)
Subject: [vtkusers] Problem with displaying cross-hairs on 2D views when
 using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack pipeline
Message-ID: <1545158446707-0.post@n5.nabble.com>

Hi vtkUsers, 

I am developing a four-pane viewer for displaying medical images. The 3
views display slices of the volumes in the 3 standard anatomical views
(axial, coronal, sagittal) whereas the 4th one displays some 3D surface
rendering of the volume. For now, I will only focus on the 2D views.

The 2D views use the following pipeline: vtkImageResliceMapper ->
vtkImageSlice -> vtkImageStack. This allows the application to overlay
slices from multiple volumes simultaneously. The attached code is a minimal
example of the 2D pipeline I use in my application. The slices displayed are
determined by the focal point of the camera in each 2D view.

What I would like to do is display a set of cross-hairs on each of the 2D
views, but I don't know how to achieve this using the pipeline I am
currently using.

I am aware of the classes: 
vtkResliceCursorWidget, 
vtkResliceCursor, 
vtkResliceCursorLineRepresentation, 
vtkImagePlaneWidget, 
vtkResliceImageViewer

I have tried using these classes (see commented code in attached source
code), but they don't seem compatible with my current pipeline. For example,
when using vtkResliceCursorWidget the cross-hairs are visible and I can
interact with them but slicing stops working. I also see some weird
artefacts around the border of the slice. Also, to use these classes I need
to specify the volume which the reslice cursor will be slicing
(vtkResliceCursor->SetImage(imageData)), but in my case I have multiple
volumes.

I am also aware of and tried using vtkCursor2D/vtkCursor3D. Although they
are close to what I have in mind, they allow very limited customization of
their look.

Essentially what I would like to implement is something that looks like the
cursor of vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer
but does not handle slicing.

Can someone recommend how can I achieve this, or point me to some
classes/examples? Is their a way of using
vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer with my
current pipeline, or would I need to change it?

Thanks a lot for your help.
Panos

========================================================
Basic Pipeline Minimal Example
========================================================
#include <vtkCamera.h>
#include <vtkDICOMImageReader.h>
#include <vtkImageChangeInformation.h>
#include <vtkImageData.h>
#include <vtkImageProperty.h>
#include <vtkImageResliceMapper.h>
#include <vtkImageSlice.h>
#include <vtkImageStack.h>
#include <vtkInteractorStyleImage.h>
#include <vtkMath.h>
#include <vtkNIFTIImageReader.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>

#include <vtkResliceCursor.h>
#include <vtkResliceCursorActor.h>
#include <vtkResliceCursorLineRepresentation.h>
#include <vtkResliceCursorPolyDataAlgorithm.h>
#include <vtkResliceCursorWidget.h>

void setupCamera(vtkCamera* camera);
vtkSmartPointer<vtkImageData> loadDicom(const char* filename);
vtkSmartPointer<vtkImageData> loadNifti(const char* filename);

int main(int, char*[])
{
	// Setup renderer
	vtkNew<vtkRenderer> renderer;
	renderer->SetBackground(0.0, 0.0, 0.0);	
	renderer->GetActiveCamera()->ParallelProjectionOn();
	renderer->ResetCameraClippingRange();
	renderer->ResetCamera();

	// Setup renderWindow
	vtkNew<vtkRenderWindow> renderWindow;
	renderWindow->AddRenderer(renderer);

	// Setup interaction style
	vtkNew<vtkInteractorStyleImage> interactorStyle;
	interactorStyle->SetInteractionModeToImageSlicing();

	// Setup window interactor
	vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
	renderWindowInteractor->SetRenderWindow(renderWindow);
	renderWindowInteractor->SetInteractorStyle(interactorStyle);

	// Setup camera
	setupCamera(renderer->GetActiveCamera());

	// Load data from DICOM series
//	vtkSmartPointer<vtkImageData> imageData = 
//		loadDicom("<path_to_DICOM_series>"");

	// Load data from Nifti file
	vtkSmartPointer<vtkImageData> imageData =
		loadNifti("<path_to_nii_file>");

	// setup slice mapper
	vtkNew<vtkImageResliceMapper> resliceMapper;
	resliceMapper->SetInputData(imageData);
	resliceMapper->SliceFacesCameraOn();
	resliceMapper->SliceAtFocalPointOn();
	resliceMapper->JumpToNearestSliceOn();
	resliceMapper->BorderOff();

	// Set to full window and centered level:
	double window = imageData->GetScalarRange()[1] -
imageData->GetScalarRange()[0];
	double level = imageData->GetScalarRange()[0] + window / 2.0;

	// Setup prop holding the slice
	vtkNew<vtkImageSlice> imageSlice;
	imageSlice->SetMapper(resliceMapper);
	imageSlice->GetProperty()->SetColorWindow(window);
	imageSlice->GetProperty()->SetColorLevel(level);
	imageSlice->GetProperty()->SetLayerNumber(0);
	imageSlice->GetProperty()->SetInterpolationTypeToNearest();
	
	// Setup prop holding the multiple slices
	vtkNew<vtkImageStack> imageStack;
	imageStack->SetActiveLayer(imageSlice->GetProperty()->GetLayerNumber());
	imageStack->AddImage(imageSlice); // add slice

	vtkNew<vtkResliceCursor> resliceCursor;
	resliceCursor->SetCenter(imageData->GetCenter());
	resliceCursor->SetThickMode(0);
	resliceCursor->SetImage(imageData);

	vtkNew<vtkResliceCursorLineRepresentation> cursorRepresentation;
	cursorRepresentation->GetResliceCursorActor()->
           GetCursorAlgorithm()->SetResliceCursor(resliceCursor);
	cursorRepresentation->GetResliceCursorActor()->
            BasicPipeline.cxx
<http://vtk.1045678.n5.nabble.com/file/t341857/BasicPipeline.cxx> 
GetCursorAlgorithm()->SetReslicePlaneNormal(2);

	vtkNew<vtkResliceCursorWidget> resliceCursorWidget;
	resliceCursorWidget->SetInteractor(renderWindowInteractor);
	resliceCursorWidget->SetDefaultRenderer(renderer);
	resliceCursorWidget->SetRepresentation(cursorRepresentation);
	resliceCursorWidget->SetManageWindowLevel(false);
	resliceCursorWidget->EnabledOn();
	//resliceCursorWidget->ProcessEventsOff();

	// Add actors to renderer
	renderer->AddViewProp(imageStack);
	renderer->ResetCamera(); 

	// Start interaction
	renderWindowInteractor->Initialize();
	renderWindow->Render();
	renderWindowInteractor->Start();

	return EXIT_SUCCESS;
}

void setupCamera(vtkCamera* camera)
{
	double viewUp[3] = { 0, 1, 0 };
	double leftToRight[3] = { 1, 0, 0 };

	// compute the view plane normal
	double normal[3];
	vtkMath::Cross(leftToRight, viewUp, normal);

	// get the camera focus
	double focus[3];
	camera->GetFocalPoint(focus);

	// get the camera distance from the focus
	double d = camera->GetDistance();

	// position the camera on view plane normal keeping the focus and the
distance from it fixed
	camera->SetPosition(
		focus[0] + d*normal[0],
		focus[1] + d*normal[1],
		focus[2] + d*normal[2]);

	// make sure focus is the same
	camera->SetFocalPoint(focus);

	// setup view up vector
	camera->SetViewUp(viewUp);
	camera->OrthogonalizeViewUp();
}

vtkSmartPointer<vtkImageData> loadDicom(const char* filename)
{
	vtkNew<vtkDICOMImageReader> reader;
	reader->FileLowerLeftOn();
	reader->SetDirectoryName(filename);
	reader->UpdateInformation();

	vtkNew<vtkImageChangeInformation> imageInfo;
	imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
	imageInfo->SetOutputSpacing(reader->GetPixelSpacing());
	imageInfo->SetInputConnection(reader->GetOutputPort());
	imageInfo->Update();

	return imageInfo->GetOutput();
}

vtkSmartPointer<vtkImageData> loadNifti(const char* filename)
{
	vtkNew<vtkNIFTIImageReader> niftiiReader;
	niftiiReader->SetFileName(filename);

	vtkNew<vtkImageChangeInformation> imageInfo;
	imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
	imageInfo->SetInputConnection(niftiiReader->GetOutputPort());
	imageInfo->Update();

	return imageInfo->GetOutput();//data;
}





--
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From 523480317 at qq.com  Tue Dec 18 19:25:13 2018
From: 523480317 at qq.com (=?ISO-8859-1?B?eWlydWkxMjEw?=)
Date: Wed, 19 Dec 2018 08:25:13 +0800
Subject: [vtkusers] The SetRate() function of vtkFFMPEGWriter is not working
Message-ID: <tencent_C1E9E5F99AB683BA70FF9EF4DCFA1923C109@qq.com>

Hello, VTKer


I am using vtkFFMPEGWriter to write a video, no matter the frame rate I set, the output video is still 600 frames/sec.

The code I used has been attached. Can anybody check the problem for me? Thank you so much.


Regards,
YiRui
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From Andx_roo at live.com  Tue Dec 18 20:37:04 2018
From: Andx_roo at live.com (Andaharoo)
Date: Tue, 18 Dec 2018 18:37:04 -0700 (MST)
Subject: [vtkusers] Visualizing normal vectors
In-Reply-To: <1544904178474-0.post@n5.nabble.com>
References: <1544904178474-0.post@n5.nabble.com>
Message-ID: <1545183424782-0.post@n5.nabble.com>

I'd recommend using vtkOpenGLGlyph3DMapper instead. Much faster, assuming you
have some gpu. Just make sure the normal array/orientation array is in the
input polyData's point data.

IE:
polyData->GetPointData()->AddArray(your normal array)

Then just specify the array the mapper should use with
SetOrientationArray(your arrays name here). It will then search for the
array in the input polydata. I frequently use this to draw thousands of
oriented arrows with VTK.



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From lasso at queensu.ca  Wed Dec 19 01:31:31 2018
From: lasso at queensu.ca (Andras Lasso)
Date: Wed, 19 Dec 2018 06:31:31 +0000
Subject: [vtkusers] Problem with displaying cross-hairs on 2D views when
 using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack pipeline
In-Reply-To: <1545158446707-0.post@n5.nabble.com>
References: <1545158446707-0.post@n5.nabble.com>
Message-ID: <YTXPR0101MB1870ABE4ABBF6595CEEDB4FDD8BE0@YTXPR0101MB1870.CANPRD01.PROD.OUTLOOK.COM>

It is great that you are interested in medical imaging and has chosen to work with VTK. I would recommend to put your talent and effort into contributing to an existing open-source medical image viewer instead of spending time with redeveloping basic features. You could work on more interesting things, develop new features, and you would very quickly become a useful, valued member of a community.

If you are interested in answers to your question (and your future questions) you can have a look at source code of existing VTK-based open-source medical image viewers, such as 3D Slicer, MITK, medInria, Horos, Ibis, CustusX, CamiTK, Invesalius, etc.

Andras

-----Original Message-----
From: vtkusers <vtkusers-bounces at public.kitware.com> On Behalf Of ochampao
Sent: Tuesday, December 18, 2018 1:41 PM
To: vtkusers at vtk.org
Subject: [vtkusers] Problem with displaying cross-hairs on 2D views when using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack pipeline

Hi vtkUsers, 

I am developing a four-pane viewer for displaying medical images. The 3 views display slices of the volumes in the 3 standard anatomical views (axial, coronal, sagittal) whereas the 4th one displays some 3D surface rendering of the volume. For now, I will only focus on the 2D views.

The 2D views use the following pipeline: vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack. This allows the application to overlay slices from multiple volumes simultaneously. The attached code is a minimal example of the 2D pipeline I use in my application. The slices displayed are determined by the focal point of the camera in each 2D view.

What I would like to do is display a set of cross-hairs on each of the 2D views, but I don't know how to achieve this using the pipeline I am currently using.

I am aware of the classes: 
vtkResliceCursorWidget,
vtkResliceCursor,
vtkResliceCursorLineRepresentation,
vtkImagePlaneWidget,
vtkResliceImageViewer

I have tried using these classes (see commented code in attached source code), but they don't seem compatible with my current pipeline. For example, when using vtkResliceCursorWidget the cross-hairs are visible and I can interact with them but slicing stops working. I also see some weird artefacts around the border of the slice. Also, to use these classes I need to specify the volume which the reslice cursor will be slicing (vtkResliceCursor->SetImage(imageData)), but in my case I have multiple volumes.

I am also aware of and tried using vtkCursor2D/vtkCursor3D. Although they are close to what I have in mind, they allow very limited customization of their look.

Essentially what I would like to implement is something that looks like the cursor of vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer
but does not handle slicing.

Can someone recommend how can I achieve this, or point me to some classes/examples? Is their a way of using vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer with my current pipeline, or would I need to change it?

Thanks a lot for your help.
Panos

========================================================
Basic Pipeline Minimal Example
========================================================
#include <vtkCamera.h>
#include <vtkDICOMImageReader.h>
#include <vtkImageChangeInformation.h>
#include <vtkImageData.h>
#include <vtkImageProperty.h>
#include <vtkImageResliceMapper.h>
#include <vtkImageSlice.h>
#include <vtkImageStack.h>
#include <vtkInteractorStyleImage.h>
#include <vtkMath.h>
#include <vtkNIFTIImageReader.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>

#include <vtkResliceCursor.h>
#include <vtkResliceCursorActor.h>
#include <vtkResliceCursorLineRepresentation.h>
#include <vtkResliceCursorPolyDataAlgorithm.h>
#include <vtkResliceCursorWidget.h>

void setupCamera(vtkCamera* camera);
vtkSmartPointer<vtkImageData> loadDicom(const char* filename); vtkSmartPointer<vtkImageData> loadNifti(const char* filename);

int main(int, char*[])
{
	// Setup renderer
	vtkNew<vtkRenderer> renderer;
	renderer->SetBackground(0.0, 0.0, 0.0);	
	renderer->GetActiveCamera()->ParallelProjectionOn();
	renderer->ResetCameraClippingRange();
	renderer->ResetCamera();

	// Setup renderWindow
	vtkNew<vtkRenderWindow> renderWindow;
	renderWindow->AddRenderer(renderer);

	// Setup interaction style
	vtkNew<vtkInteractorStyleImage> interactorStyle;
	interactorStyle->SetInteractionModeToImageSlicing();

	// Setup window interactor
	vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
	renderWindowInteractor->SetRenderWindow(renderWindow);
	renderWindowInteractor->SetInteractorStyle(interactorStyle);

	// Setup camera
	setupCamera(renderer->GetActiveCamera());

	// Load data from DICOM series
//	vtkSmartPointer<vtkImageData> imageData = 
//		loadDicom("<path_to_DICOM_series>"");

	// Load data from Nifti file
	vtkSmartPointer<vtkImageData> imageData =
		loadNifti("<path_to_nii_file>");

	// setup slice mapper
	vtkNew<vtkImageResliceMapper> resliceMapper;
	resliceMapper->SetInputData(imageData);
	resliceMapper->SliceFacesCameraOn();
	resliceMapper->SliceAtFocalPointOn();
	resliceMapper->JumpToNearestSliceOn();
	resliceMapper->BorderOff();

	// Set to full window and centered level:
	double window = imageData->GetScalarRange()[1] -
imageData->GetScalarRange()[0];
	double level = imageData->GetScalarRange()[0] + window / 2.0;

	// Setup prop holding the slice
	vtkNew<vtkImageSlice> imageSlice;
	imageSlice->SetMapper(resliceMapper);
	imageSlice->GetProperty()->SetColorWindow(window);
	imageSlice->GetProperty()->SetColorLevel(level);
	imageSlice->GetProperty()->SetLayerNumber(0);
	imageSlice->GetProperty()->SetInterpolationTypeToNearest();
	
	// Setup prop holding the multiple slices
	vtkNew<vtkImageStack> imageStack;
	imageStack->SetActiveLayer(imageSlice->GetProperty()->GetLayerNumber());
	imageStack->AddImage(imageSlice); // add slice

	vtkNew<vtkResliceCursor> resliceCursor;
	resliceCursor->SetCenter(imageData->GetCenter());
	resliceCursor->SetThickMode(0);
	resliceCursor->SetImage(imageData);

	vtkNew<vtkResliceCursorLineRepresentation> cursorRepresentation;
	cursorRepresentation->GetResliceCursorActor()->
           GetCursorAlgorithm()->SetResliceCursor(resliceCursor);
	cursorRepresentation->GetResliceCursorActor()->
            BasicPipeline.cxx
<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fvtk.1045678.n5.nabble.com%2Ffile%2Ft341857%2FBasicPipeline.cxx&amp;data=02%7C01%7Classo%40queensu.ca%7C80118413b7ba4ceb15d108d665185599%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C1%7C636807552523602151&amp;sdata=nT57nY7HqbSgYg8flXNrjvfhqXVDbvDHbyEOMCVE3V0%3D&amp;reserved=0>
GetCursorAlgorithm()->SetReslicePlaneNormal(2);

	vtkNew<vtkResliceCursorWidget> resliceCursorWidget;
	resliceCursorWidget->SetInteractor(renderWindowInteractor);
	resliceCursorWidget->SetDefaultRenderer(renderer);
	resliceCursorWidget->SetRepresentation(cursorRepresentation);
	resliceCursorWidget->SetManageWindowLevel(false);
	resliceCursorWidget->EnabledOn();
	//resliceCursorWidget->ProcessEventsOff();

	// Add actors to renderer
	renderer->AddViewProp(imageStack);
	renderer->ResetCamera(); 

	// Start interaction
	renderWindowInteractor->Initialize();
	renderWindow->Render();
	renderWindowInteractor->Start();

	return EXIT_SUCCESS;
}

void setupCamera(vtkCamera* camera)
{
	double viewUp[3] = { 0, 1, 0 };
	double leftToRight[3] = { 1, 0, 0 };

	// compute the view plane normal
	double normal[3];
	vtkMath::Cross(leftToRight, viewUp, normal);

	// get the camera focus
	double focus[3];
	camera->GetFocalPoint(focus);

	// get the camera distance from the focus
	double d = camera->GetDistance();

	// position the camera on view plane normal keeping the focus and the distance from it fixed
	camera->SetPosition(
		focus[0] + d*normal[0],
		focus[1] + d*normal[1],
		focus[2] + d*normal[2]);

	// make sure focus is the same
	camera->SetFocalPoint(focus);

	// setup view up vector
	camera->SetViewUp(viewUp);
	camera->OrthogonalizeViewUp();
}

vtkSmartPointer<vtkImageData> loadDicom(const char* filename) {
	vtkNew<vtkDICOMImageReader> reader;
	reader->FileLowerLeftOn();
	reader->SetDirectoryName(filename);
	reader->UpdateInformation();

	vtkNew<vtkImageChangeInformation> imageInfo;
	imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
	imageInfo->SetOutputSpacing(reader->GetPixelSpacing());
	imageInfo->SetInputConnection(reader->GetOutputPort());
	imageInfo->Update();

	return imageInfo->GetOutput();
}

vtkSmartPointer<vtkImageData> loadNifti(const char* filename) {
	vtkNew<vtkNIFTIImageReader> niftiiReader;
	niftiiReader->SetFileName(filename);

	vtkNew<vtkImageChangeInformation> imageInfo;
	imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
	imageInfo->SetInputConnection(niftiiReader->GetOutputPort());
	imageInfo->Update();

	return imageInfo->GetOutput();//data;
}





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From mozendi at gmail.com  Wed Dec 19 03:24:28 2018
From: mozendi at gmail.com (mozendi)
Date: Wed, 19 Dec 2018 01:24:28 -0700 (MST)
Subject: [vtkusers] Visualizing normal vectors
In-Reply-To: <1545183424782-0.post@n5.nabble.com>
References: <1544904178474-0.post@n5.nabble.com>
 <1545183424782-0.post@n5.nabble.com>
Message-ID: <1545207868212-0.post@n5.nabble.com>

Dear Andaharoo,
Thank you for your recommendation. I tried to modify my codes according to
your recommendations, my code is getting compiled successfully. However,
when I run it I am getting an error message. The screenshot and my code are
below. Could you please tell me what is wrong with my code?
Thanks in advance
<http://vtk.1045678.n5.nabble.com/file/t341822/vtk_error_message.png> 


#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkDelimitedTextReader.h>
#include <vtkDoubleArray.h>
#include <vtkTable.h>
#include <vtkPointData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkVertexGlyphFilter.h>
#include <vtkArrowSource.h>
#include <vtkGlyph3D.h>
#include <vtkPointSource.h>
# include "vtkGlyph3DMapper.h"
# include "vtkGlyph3DMapper.h"
#include <vtkOpenGLGlyph3DMapper.h>
#include <vector>


int main(int argc, char* argv[])
{
	vtkSmartPointer<vtkDelimitedTextReader> reader =
vtkSmartPointer<vtkDelimitedTextReader>::New();
	reader->SetFileName("points_and_normals.xyz");
	reader->DetectNumericColumnsOn();
	reader->SetFieldDelimiterCharacters(" ");
	reader->Update();

	vtkTable* table = reader->GetOutput();
	vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
	vtkSmartPointer<vtkDoubleArray> normals =
vtkSmartPointer<vtkDoubleArray>::New();
	normals->SetNumberOfComponents(3); //3d normals (ie x,y,z)

	std::cout << "Table has " << table->GetNumberOfRows()
		<< " rows." << std::endl;
	std::cout << "Table has " << table->GetNumberOfColumns()
		<< " columns." << std::endl;

	for (vtkIdType i = 0; i < table->GetNumberOfRows(); i++)
	{

		points->InsertNextPoint((table->GetValue(i, 0)).ToDouble(),
			(table->GetValue(i, 1)).ToDouble(),
			(table->GetValue(i, 2)).ToDouble());

		double n[3];
		n[0] = (table->GetValue(i, 3)).ToDouble();
		n[1] = (table->GetValue(i, 4)).ToDouble();
		n[2] = (table->GetValue(i, 5)).ToDouble();
		normals->InsertNextTuple(n);
	}

	std::cout << "There are " << points->GetNumberOfPoints()
		<< " points." << std::endl;
		

	vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
	polydata->SetPoints(points);
	//polydata->GetPointData()->SetNormals(normals);
	polydata->GetPointData()->AddArray(normals);
	
	vtkSmartPointer<vtkOpenGLGlyph3DMapper> Glyph3D =
vtkSmartPointer<vtkOpenGLGlyph3DMapper>::New();
	Glyph3D->SetInputData(polydata);
	Glyph3D->SetOrientationArray("normals");
	Glyph3D->SetScaleFactor(.5);
	Glyph3D->Update();
		
	vtkSmartPointer<vtkActor> glyph3DActor =	vtkSmartPointer<vtkActor>::New();
	glyph3DActor->SetMapper(Glyph3D);
	glyph3DActor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);

	vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
	renderWindow->AddRenderer(renderer);
	vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
	renderWindowInteractor->SetRenderWindow(renderWindow);
	renderer->AddActor(glyph3DActor);
	renderer->SetBackground(.5, .5, .5);
	renderWindow->Render();
	renderWindowInteractor->Start();
	return EXIT_SUCCESS;
}





--
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From Andx_roo at live.com  Wed Dec 19 04:26:23 2018
From: Andx_roo at live.com (Andaharoo)
Date: Wed, 19 Dec 2018 02:26:23 -0700 (MST)
Subject: [vtkusers] Visualizing normal vectors
In-Reply-To: <1545207868212-0.post@n5.nabble.com>
References: <1544904178474-0.post@n5.nabble.com>
 <1545183424782-0.post@n5.nabble.com> <1545207868212-0.post@n5.nabble.com>
Message-ID: <1545211583462-0.post@n5.nabble.com>

Your error said an array index went out of bounds. What line? Also I noticed
you never set the source data for the glyph. Could be unrelated to your
current error message, but a problem.

The glyph mapper takes two inputs. The glyph data (positions, normals,
scalars, etc) and the source (thing to copy). So if you want arrows as the
normals do this:

vtkSmartPointer<vtkOpenGLGlyph3DMapper> glyph3D =
vtkSmartPointer<vtkOpenGLGlyph3DMapper>::New(); 
glyph3D ->SetInputData(polydata); 
vtkSmartPointer<vtkArrowSource> glyphSource =
vtkSmartPointer<vtkArrowSource>::New();
glyphSource->Update();
glyph3D->SetSourceData(glyphSource->GetOutput());
glyph3D ->SetOrientationArray("normals"); 
glyph3D ->SetScaleFactor(0.5); 
glyph3D ->Update(); 



--
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From andrew.buckler at elucidbio.com  Wed Dec 19 12:51:20 2018
From: andrew.buckler at elucidbio.com (Andrew J. Buckler (Elucid Bioimaging))
Date: Wed, 19 Dec 2018 17:51:20 +0000
Subject: [vtkusers] vtkImageInterpolator when original image direction was
 -1 for an axis
Message-ID: <DM6PR16MB2585E73908FFAC79152D421382BE0@DM6PR16MB2585.namprd16.prod.outlook.com>

Hello,
I have an application that successfully uses vtkImageInterpolator that ultimately use DICOM data read in by ITK. These data sets display correctly even when the z direction is -1, but the interpolator does not work when the data coordinate is less than the origin.

It is possible that the problem originates in my use of vtkVolumePicker to pick the point, but this appears well behaved, in returning a coordinate smaller than the value of the origin, as makes sense for the direction being negative, and the point it returns is correct in the volume.

Resetting the origin doesn't help, as the picker still returns a coordinate smaller than the (new) origin - it seems to just slide all numbers down.

Rotating the image so as to make the direction of the z axis positive does make it work - but then the display causes an unintended mirror image problem (e.g., the aorta comes in front of the heart rather than staying behind the heart in a chest image).

I am sure it must be obvious but I have not yet seen what to do.

Thank you,
Andy

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From andrew.buckler at elucidbio.com  Wed Dec 19 12:51:20 2018
From: andrew.buckler at elucidbio.com (Andrew J. Buckler (Elucid Bioimaging))
Date: Wed, 19 Dec 2018 17:51:20 +0000
Subject: [vtkusers] vtkImageInterpolator when original image direction was
 -1 for an axis
Message-ID: <DM6PR16MB2585E73908FFAC79152D421382BE0@DM6PR16MB2585.namprd16.prod.outlook.com>

Hello,
I have an application that successfully uses vtkImageInterpolator that ultimately use DICOM data read in by ITK. These data sets display correctly even when the z direction is -1, but the interpolator does not work when the data coordinate is less than the origin.

It is possible that the problem originates in my use of vtkVolumePicker to pick the point, but this appears well behaved, in returning a coordinate smaller than the value of the origin, as makes sense for the direction being negative, and the point it returns is correct in the volume.

Resetting the origin doesn't help, as the picker still returns a coordinate smaller than the (new) origin - it seems to just slide all numbers down.

Rotating the image so as to make the direction of the z axis positive does make it work - but then the display causes an unintended mirror image problem (e.g., the aorta comes in front of the heart rather than staying behind the heart in a chest image).

I am sure it must be obvious but I have not yet seen what to do.

Thank you,
Andy

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From msmerps at gmail.com  Wed Dec 19 14:01:09 2018
From: msmerps at gmail.com (The Merper)
Date: Wed, 19 Dec 2018 14:01:09 -0500
Subject: [vtkusers] Renderer specific interactors?
Message-ID: <CALbMNiyUBEQWKYZta63VtBTQ-hj+VXmi_VYU=RkMNVM6ptAhDw@mail.gmail.com>

Hi all,
  I am trying to create a RenderWindow with multiple Renderers. I want
mouse clicks to have different actions in the different renderers. Is this
possible? It appears that the same interactor is applied to all Renderers
that belong to a RenderWindow.
     thank you in advance,
           -Merps
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From poweruserm at live.com.au  Wed Dec 19 20:46:40 2018
From: poweruserm at live.com.au (A Z)
Date: Thu, 20 Dec 2018 01:46:40 +0000
Subject: [vtkusers] vtkusers Digest, Vol 176, Issue 22
In-Reply-To: <mailman.7.1545238806.28954.vtkusers@public.kitware.com>
References: <mailman.7.1545238806.28954.vtkusers@public.kitware.com>
Message-ID: <SL2P216MB0588013C3B10C91A52A683219ABF0@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>

I'm in a situation where I'm in a secure environment,
and I can't use Visual Studio or other sorts of tools
to compile and build the VTK.  Particularly,
this is an issue if I need VTK in 64 bit (for Windows).

The other thing is that high speed internet through
the hardware of the phone network is not all that great
where we are.  We are prepared to download the VTK once,
byt not Visual Studio, who who knows what else
Cygwin might need.  :(

What I think I simply finally and just plain need
is for the VTK to buld the 64 bit Windows .dlls for me,
and offer them for download via an internet site.

Can someone who is part of the VTK team acomplish this for me,
but for other similar members of the public as well?
________________________________
From: vtkusers <vtkusers-bounces at public.kitware.com> on behalf of vtkusers-request at public.kitware.com <vtkusers-request at public.kitware.com>
Sent: Thursday, 20 December 2018 4:00 AM
To: vtkusers at public.kitware.com
Subject: vtkusers Digest, Vol 176, Issue 22

Send vtkusers mailing list submissions to
        vtkusers at public.kitware.com

To subscribe or unsubscribe via the World Wide Web, visit
        https://public.kitware.com/mailman/listinfo/vtkusers
or, via email, send a message with subject or body 'help' to
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When replying, please edit your Subject line so it is more specific
than "Re: Contents of vtkusers digest..."


Today's Topics:

   1. Problem with displaying cross-hairs on 2D views when using
      vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack pipeline
      (ochampao)
   2. The SetRate() function of vtkFFMPEGWriter is not working
      (=?ISO-8859-1?B?eWlydWkxMjEw?=)
   3. Re: Visualizing normal vectors (Andaharoo)
   4. Re: Problem with displaying cross-hairs on 2D views when
      using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack
      pipeline (Andras Lasso)
   5. Re: Visualizing normal vectors (mozendi)
   6. Re: Visualizing normal vectors (Andaharoo)


----------------------------------------------------------------------

Message: 1
Date: Tue, 18 Dec 2018 11:40:46 -0700 (MST)
From: ochampao <ochampao at hotmail.com>
To: vtkusers at vtk.org
Subject: [vtkusers] Problem with displaying cross-hairs on 2D views
        when using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack
        pipeline
Message-ID: <1545158446707-0.post at n5.nabble.com>
Content-Type: text/plain; charset=us-ascii

Hi vtkUsers,

I am developing a four-pane viewer for displaying medical images. The 3
views display slices of the volumes in the 3 standard anatomical views
(axial, coronal, sagittal) whereas the 4th one displays some 3D surface
rendering of the volume. For now, I will only focus on the 2D views.

The 2D views use the following pipeline: vtkImageResliceMapper ->
vtkImageSlice -> vtkImageStack. This allows the application to overlay
slices from multiple volumes simultaneously. The attached code is a minimal
example of the 2D pipeline I use in my application. The slices displayed are
determined by the focal point of the camera in each 2D view.

What I would like to do is display a set of cross-hairs on each of the 2D
views, but I don't know how to achieve this using the pipeline I am
currently using.

I am aware of the classes:
vtkResliceCursorWidget,
vtkResliceCursor,
vtkResliceCursorLineRepresentation,
vtkImagePlaneWidget,
vtkResliceImageViewer

I have tried using these classes (see commented code in attached source
code), but they don't seem compatible with my current pipeline. For example,
when using vtkResliceCursorWidget the cross-hairs are visible and I can
interact with them but slicing stops working. I also see some weird
artefacts around the border of the slice. Also, to use these classes I need
to specify the volume which the reslice cursor will be slicing
(vtkResliceCursor->SetImage(imageData)), but in my case I have multiple
volumes.

I am also aware of and tried using vtkCursor2D/vtkCursor3D. Although they
are close to what I have in mind, they allow very limited customization of
their look.

Essentially what I would like to implement is something that looks like the
cursor of vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer
but does not handle slicing.

Can someone recommend how can I achieve this, or point me to some
classes/examples? Is their a way of using
vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer with my
current pipeline, or would I need to change it?

Thanks a lot for your help.
Panos

========================================================
Basic Pipeline Minimal Example
========================================================
#include <vtkCamera.h>
#include <vtkDICOMImageReader.h>
#include <vtkImageChangeInformation.h>
#include <vtkImageData.h>
#include <vtkImageProperty.h>
#include <vtkImageResliceMapper.h>
#include <vtkImageSlice.h>
#include <vtkImageStack.h>
#include <vtkInteractorStyleImage.h>
#include <vtkMath.h>
#include <vtkNIFTIImageReader.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>

#include <vtkResliceCursor.h>
#include <vtkResliceCursorActor.h>
#include <vtkResliceCursorLineRepresentation.h>
#include <vtkResliceCursorPolyDataAlgorithm.h>
#include <vtkResliceCursorWidget.h>

void setupCamera(vtkCamera* camera);
vtkSmartPointer<vtkImageData> loadDicom(const char* filename);
vtkSmartPointer<vtkImageData> loadNifti(const char* filename);

int main(int, char*[])
{
        // Setup renderer
        vtkNew<vtkRenderer> renderer;
        renderer->SetBackground(0.0, 0.0, 0.0);
        renderer->GetActiveCamera()->ParallelProjectionOn();
        renderer->ResetCameraClippingRange();
        renderer->ResetCamera();

        // Setup renderWindow
        vtkNew<vtkRenderWindow> renderWindow;
        renderWindow->AddRenderer(renderer);

        // Setup interaction style
        vtkNew<vtkInteractorStyleImage> interactorStyle;
        interactorStyle->SetInteractionModeToImageSlicing();

        // Setup window interactor
        vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
        renderWindowInteractor->SetRenderWindow(renderWindow);
        renderWindowInteractor->SetInteractorStyle(interactorStyle);

        // Setup camera
        setupCamera(renderer->GetActiveCamera());

        // Load data from DICOM series
//      vtkSmartPointer<vtkImageData> imageData =
//              loadDicom("<path_to_DICOM_series>"");

        // Load data from Nifti file
        vtkSmartPointer<vtkImageData> imageData =
                loadNifti("<path_to_nii_file>");

        // setup slice mapper
        vtkNew<vtkImageResliceMapper> resliceMapper;
        resliceMapper->SetInputData(imageData);
        resliceMapper->SliceFacesCameraOn();
        resliceMapper->SliceAtFocalPointOn();
        resliceMapper->JumpToNearestSliceOn();
        resliceMapper->BorderOff();

        // Set to full window and centered level:
        double window = imageData->GetScalarRange()[1] -
imageData->GetScalarRange()[0];
        double level = imageData->GetScalarRange()[0] + window / 2.0;

        // Setup prop holding the slice
        vtkNew<vtkImageSlice> imageSlice;
        imageSlice->SetMapper(resliceMapper);
        imageSlice->GetProperty()->SetColorWindow(window);
        imageSlice->GetProperty()->SetColorLevel(level);
        imageSlice->GetProperty()->SetLayerNumber(0);
        imageSlice->GetProperty()->SetInterpolationTypeToNearest();

        // Setup prop holding the multiple slices
        vtkNew<vtkImageStack> imageStack;
        imageStack->SetActiveLayer(imageSlice->GetProperty()->GetLayerNumber());
        imageStack->AddImage(imageSlice); // add slice

        vtkNew<vtkResliceCursor> resliceCursor;
        resliceCursor->SetCenter(imageData->GetCenter());
        resliceCursor->SetThickMode(0);
        resliceCursor->SetImage(imageData);

        vtkNew<vtkResliceCursorLineRepresentation> cursorRepresentation;
        cursorRepresentation->GetResliceCursorActor()->
           GetCursorAlgorithm()->SetResliceCursor(resliceCursor);
        cursorRepresentation->GetResliceCursorActor()->
            BasicPipeline.cxx
<http://vtk.1045678.n5.nabble.com/file/t341857/BasicPipeline.cxx>
GetCursorAlgorithm()->SetReslicePlaneNormal(2);

        vtkNew<vtkResliceCursorWidget> resliceCursorWidget;
        resliceCursorWidget->SetInteractor(renderWindowInteractor);
        resliceCursorWidget->SetDefaultRenderer(renderer);
        resliceCursorWidget->SetRepresentation(cursorRepresentation);
        resliceCursorWidget->SetManageWindowLevel(false);
        resliceCursorWidget->EnabledOn();
        //resliceCursorWidget->ProcessEventsOff();

        // Add actors to renderer
        renderer->AddViewProp(imageStack);
        renderer->ResetCamera();

        // Start interaction
        renderWindowInteractor->Initialize();
        renderWindow->Render();
        renderWindowInteractor->Start();

        return EXIT_SUCCESS;
}

void setupCamera(vtkCamera* camera)
{
        double viewUp[3] = { 0, 1, 0 };
        double leftToRight[3] = { 1, 0, 0 };

        // compute the view plane normal
        double normal[3];
        vtkMath::Cross(leftToRight, viewUp, normal);

        // get the camera focus
        double focus[3];
        camera->GetFocalPoint(focus);

        // get the camera distance from the focus
        double d = camera->GetDistance();

        // position the camera on view plane normal keeping the focus and the
distance from it fixed
        camera->SetPosition(
                focus[0] + d*normal[0],
                focus[1] + d*normal[1],
                focus[2] + d*normal[2]);

        // make sure focus is the same
        camera->SetFocalPoint(focus);

        // setup view up vector
        camera->SetViewUp(viewUp);
        camera->OrthogonalizeViewUp();
}

vtkSmartPointer<vtkImageData> loadDicom(const char* filename)
{
        vtkNew<vtkDICOMImageReader> reader;
        reader->FileLowerLeftOn();
        reader->SetDirectoryName(filename);
        reader->UpdateInformation();

        vtkNew<vtkImageChangeInformation> imageInfo;
        imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
        imageInfo->SetOutputSpacing(reader->GetPixelSpacing());
        imageInfo->SetInputConnection(reader->GetOutputPort());
        imageInfo->Update();

        return imageInfo->GetOutput();
}

vtkSmartPointer<vtkImageData> loadNifti(const char* filename)
{
        vtkNew<vtkNIFTIImageReader> niftiiReader;
        niftiiReader->SetFileName(filename);

        vtkNew<vtkImageChangeInformation> imageInfo;
        imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
        imageInfo->SetInputConnection(niftiiReader->GetOutputPort());
        imageInfo->Update();

        return imageInfo->GetOutput();//data;
}





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------------------------------

Message: 2
Date: Wed, 19 Dec 2018 08:25:13 +0800
From: "=?ISO-8859-1?B?eWlydWkxMjEw?=" <523480317 at qq.com>
To: "=?ISO-8859-1?B?dnRrdXNlcnM=?=" <vtkusers at public.kitware.com>
Subject: [vtkusers] The SetRate() function of vtkFFMPEGWriter is not
        working
Message-ID: <tencent_C1E9E5F99AB683BA70FF9EF4DCFA1923C109 at qq.com>
Content-Type: text/plain; charset="iso-8859-1"

Hello, VTKer


I am using vtkFFMPEGWriter to write a video, no matter the frame rate I set, the output video is still 600 frames/sec.

The code I used has been attached. Can anybody check the problem for me? Thank you so much.


Regards,
YiRui
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------------------------------

Message: 3
Date: Tue, 18 Dec 2018 18:37:04 -0700 (MST)
From: Andaharoo <Andx_roo at live.com>
To: vtkusers at vtk.org
Subject: Re: [vtkusers] Visualizing normal vectors
Message-ID: <1545183424782-0.post at n5.nabble.com>
Content-Type: text/plain; charset=us-ascii

I'd recommend using vtkOpenGLGlyph3DMapper instead. Much faster, assuming you
have some gpu. Just make sure the normal array/orientation array is in the
input polyData's point data.

IE:
polyData->GetPointData()->AddArray(your normal array)

Then just specify the array the mapper should use with
SetOrientationArray(your arrays name here). It will then search for the
array in the input polydata. I frequently use this to draw thousands of
oriented arrows with VTK.



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------------------------------

Message: 4
Date: Wed, 19 Dec 2018 06:31:31 +0000
From: Andras Lasso <lasso at queensu.ca>
To: ochampao <ochampao at hotmail.com>, "vtkusers at vtk.org"
        <vtkusers at vtk.org>
Subject: Re: [vtkusers] Problem with displaying cross-hairs on 2D
        views when using vtkImageResliceMapper -> vtkImageSlice ->
        vtkImageStack pipeline
Message-ID:
        <YTXPR0101MB1870ABE4ABBF6595CEEDB4FDD8BE0 at YTXPR0101MB1870.CANPRD01.PROD.OUTLOOK.COM>

Content-Type: text/plain; charset="us-ascii"

It is great that you are interested in medical imaging and has chosen to work with VTK. I would recommend to put your talent and effort into contributing to an existing open-source medical image viewer instead of spending time with redeveloping basic features. You could work on more interesting things, develop new features, and you would very quickly become a useful, valued member of a community.

If you are interested in answers to your question (and your future questions) you can have a look at source code of existing VTK-based open-source medical image viewers, such as 3D Slicer, MITK, medInria, Horos, Ibis, CustusX, CamiTK, Invesalius, etc.

Andras

-----Original Message-----
From: vtkusers <vtkusers-bounces at public.kitware.com> On Behalf Of ochampao
Sent: Tuesday, December 18, 2018 1:41 PM
To: vtkusers at vtk.org
Subject: [vtkusers] Problem with displaying cross-hairs on 2D views when using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack pipeline

Hi vtkUsers,

I am developing a four-pane viewer for displaying medical images. The 3 views display slices of the volumes in the 3 standard anatomical views (axial, coronal, sagittal) whereas the 4th one displays some 3D surface rendering of the volume. For now, I will only focus on the 2D views.

The 2D views use the following pipeline: vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack. This allows the application to overlay slices from multiple volumes simultaneously. The attached code is a minimal example of the 2D pipeline I use in my application. The slices displayed are determined by the focal point of the camera in each 2D view.

What I would like to do is display a set of cross-hairs on each of the 2D views, but I don't know how to achieve this using the pipeline I am currently using.

I am aware of the classes:
vtkResliceCursorWidget,
vtkResliceCursor,
vtkResliceCursorLineRepresentation,
vtkImagePlaneWidget,
vtkResliceImageViewer

I have tried using these classes (see commented code in attached source code), but they don't seem compatible with my current pipeline. For example, when using vtkResliceCursorWidget the cross-hairs are visible and I can interact with them but slicing stops working. I also see some weird artefacts around the border of the slice. Also, to use these classes I need to specify the volume which the reslice cursor will be slicing (vtkResliceCursor->SetImage(imageData)), but in my case I have multiple volumes.

I am also aware of and tried using vtkCursor2D/vtkCursor3D. Although they are close to what I have in mind, they allow very limited customization of their look.

Essentially what I would like to implement is something that looks like the cursor of vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer
but does not handle slicing.

Can someone recommend how can I achieve this, or point me to some classes/examples? Is their a way of using vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer with my current pipeline, or would I need to change it?

Thanks a lot for your help.
Panos

========================================================
Basic Pipeline Minimal Example
========================================================
#include <vtkCamera.h>
#include <vtkDICOMImageReader.h>
#include <vtkImageChangeInformation.h>
#include <vtkImageData.h>
#include <vtkImageProperty.h>
#include <vtkImageResliceMapper.h>
#include <vtkImageSlice.h>
#include <vtkImageStack.h>
#include <vtkInteractorStyleImage.h>
#include <vtkMath.h>
#include <vtkNIFTIImageReader.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>

#include <vtkResliceCursor.h>
#include <vtkResliceCursorActor.h>
#include <vtkResliceCursorLineRepresentation.h>
#include <vtkResliceCursorPolyDataAlgorithm.h>
#include <vtkResliceCursorWidget.h>

void setupCamera(vtkCamera* camera);
vtkSmartPointer<vtkImageData> loadDicom(const char* filename); vtkSmartPointer<vtkImageData> loadNifti(const char* filename);

int main(int, char*[])
{
        // Setup renderer
        vtkNew<vtkRenderer> renderer;
        renderer->SetBackground(0.0, 0.0, 0.0);
        renderer->GetActiveCamera()->ParallelProjectionOn();
        renderer->ResetCameraClippingRange();
        renderer->ResetCamera();

        // Setup renderWindow
        vtkNew<vtkRenderWindow> renderWindow;
        renderWindow->AddRenderer(renderer);

        // Setup interaction style
        vtkNew<vtkInteractorStyleImage> interactorStyle;
        interactorStyle->SetInteractionModeToImageSlicing();

        // Setup window interactor
        vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
        renderWindowInteractor->SetRenderWindow(renderWindow);
        renderWindowInteractor->SetInteractorStyle(interactorStyle);

        // Setup camera
        setupCamera(renderer->GetActiveCamera());

        // Load data from DICOM series
//      vtkSmartPointer<vtkImageData> imageData =
//              loadDicom("<path_to_DICOM_series>"");

        // Load data from Nifti file
        vtkSmartPointer<vtkImageData> imageData =
                loadNifti("<path_to_nii_file>");

        // setup slice mapper
        vtkNew<vtkImageResliceMapper> resliceMapper;
        resliceMapper->SetInputData(imageData);
        resliceMapper->SliceFacesCameraOn();
        resliceMapper->SliceAtFocalPointOn();
        resliceMapper->JumpToNearestSliceOn();
        resliceMapper->BorderOff();

        // Set to full window and centered level:
        double window = imageData->GetScalarRange()[1] -
imageData->GetScalarRange()[0];
        double level = imageData->GetScalarRange()[0] + window / 2.0;

        // Setup prop holding the slice
        vtkNew<vtkImageSlice> imageSlice;
        imageSlice->SetMapper(resliceMapper);
        imageSlice->GetProperty()->SetColorWindow(window);
        imageSlice->GetProperty()->SetColorLevel(level);
        imageSlice->GetProperty()->SetLayerNumber(0);
        imageSlice->GetProperty()->SetInterpolationTypeToNearest();

        // Setup prop holding the multiple slices
        vtkNew<vtkImageStack> imageStack;
        imageStack->SetActiveLayer(imageSlice->GetProperty()->GetLayerNumber());
        imageStack->AddImage(imageSlice); // add slice

        vtkNew<vtkResliceCursor> resliceCursor;
        resliceCursor->SetCenter(imageData->GetCenter());
        resliceCursor->SetThickMode(0);
        resliceCursor->SetImage(imageData);

        vtkNew<vtkResliceCursorLineRepresentation> cursorRepresentation;
        cursorRepresentation->GetResliceCursorActor()->
           GetCursorAlgorithm()->SetResliceCursor(resliceCursor);
        cursorRepresentation->GetResliceCursorActor()->
            BasicPipeline.cxx
<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fvtk.1045678.n5.nabble.com%2Ffile%2Ft341857%2FBasicPipeline.cxx&amp;data=02%7C01%7Classo%40queensu.ca%7C80118413b7ba4ceb15d108d665185599%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C1%7C636807552523602151&amp;sdata=nT57nY7HqbSgYg8flXNrjvfhqXVDbvDHbyEOMCVE3V0%3D&amp;reserved=0>
GetCursorAlgorithm()->SetReslicePlaneNormal(2);

        vtkNew<vtkResliceCursorWidget> resliceCursorWidget;
        resliceCursorWidget->SetInteractor(renderWindowInteractor);
        resliceCursorWidget->SetDefaultRenderer(renderer);
        resliceCursorWidget->SetRepresentation(cursorRepresentation);
        resliceCursorWidget->SetManageWindowLevel(false);
        resliceCursorWidget->EnabledOn();
        //resliceCursorWidget->ProcessEventsOff();

        // Add actors to renderer
        renderer->AddViewProp(imageStack);
        renderer->ResetCamera();

        // Start interaction
        renderWindowInteractor->Initialize();
        renderWindow->Render();
        renderWindowInteractor->Start();

        return EXIT_SUCCESS;
}

void setupCamera(vtkCamera* camera)
{
        double viewUp[3] = { 0, 1, 0 };
        double leftToRight[3] = { 1, 0, 0 };

        // compute the view plane normal
        double normal[3];
        vtkMath::Cross(leftToRight, viewUp, normal);

        // get the camera focus
        double focus[3];
        camera->GetFocalPoint(focus);

        // get the camera distance from the focus
        double d = camera->GetDistance();

        // position the camera on view plane normal keeping the focus and the distance from it fixed
        camera->SetPosition(
                focus[0] + d*normal[0],
                focus[1] + d*normal[1],
                focus[2] + d*normal[2]);

        // make sure focus is the same
        camera->SetFocalPoint(focus);

        // setup view up vector
        camera->SetViewUp(viewUp);
        camera->OrthogonalizeViewUp();
}

vtkSmartPointer<vtkImageData> loadDicom(const char* filename) {
        vtkNew<vtkDICOMImageReader> reader;
        reader->FileLowerLeftOn();
        reader->SetDirectoryName(filename);
        reader->UpdateInformation();

        vtkNew<vtkImageChangeInformation> imageInfo;
        imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
        imageInfo->SetOutputSpacing(reader->GetPixelSpacing());
        imageInfo->SetInputConnection(reader->GetOutputPort());
        imageInfo->Update();

        return imageInfo->GetOutput();
}

vtkSmartPointer<vtkImageData> loadNifti(const char* filename) {
        vtkNew<vtkNIFTIImageReader> niftiiReader;
        niftiiReader->SetFileName(filename);

        vtkNew<vtkImageChangeInformation> imageInfo;
        imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
        imageInfo->SetInputConnection(niftiiReader->GetOutputPort());
        imageInfo->Update();

        return imageInfo->GetOutput();//data;
}





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------------------------------

Message: 5
Date: Wed, 19 Dec 2018 01:24:28 -0700 (MST)
From: mozendi <mozendi at gmail.com>
To: vtkusers at vtk.org
Subject: Re: [vtkusers] Visualizing normal vectors
Message-ID: <1545207868212-0.post at n5.nabble.com>
Content-Type: text/plain; charset=us-ascii

Dear Andaharoo,
Thank you for your recommendation. I tried to modify my codes according to
your recommendations, my code is getting compiled successfully. However,
when I run it I am getting an error message. The screenshot and my code are
below. Could you please tell me what is wrong with my code?
Thanks in advance
<http://vtk.1045678.n5.nabble.com/file/t341822/vtk_error_message.png>


#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkDelimitedTextReader.h>
#include <vtkDoubleArray.h>
#include <vtkTable.h>
#include <vtkPointData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkVertexGlyphFilter.h>
#include <vtkArrowSource.h>
#include <vtkGlyph3D.h>
#include <vtkPointSource.h>
# include "vtkGlyph3DMapper.h"
# include "vtkGlyph3DMapper.h"
#include <vtkOpenGLGlyph3DMapper.h>
#include <vector>


int main(int argc, char* argv[])
{
        vtkSmartPointer<vtkDelimitedTextReader> reader =
vtkSmartPointer<vtkDelimitedTextReader>::New();
        reader->SetFileName("points_and_normals.xyz");
        reader->DetectNumericColumnsOn();
        reader->SetFieldDelimiterCharacters(" ");
        reader->Update();

        vtkTable* table = reader->GetOutput();
        vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
        vtkSmartPointer<vtkDoubleArray> normals =
vtkSmartPointer<vtkDoubleArray>::New();
        normals->SetNumberOfComponents(3); //3d normals (ie x,y,z)

        std::cout << "Table has " << table->GetNumberOfRows()
                << " rows." << std::endl;
        std::cout << "Table has " << table->GetNumberOfColumns()
                << " columns." << std::endl;

        for (vtkIdType i = 0; i < table->GetNumberOfRows(); i++)
        {

                points->InsertNextPoint((table->GetValue(i, 0)).ToDouble(),
                        (table->GetValue(i, 1)).ToDouble(),
                        (table->GetValue(i, 2)).ToDouble());

                double n[3];
                n[0] = (table->GetValue(i, 3)).ToDouble();
                n[1] = (table->GetValue(i, 4)).ToDouble();
                n[2] = (table->GetValue(i, 5)).ToDouble();
                normals->InsertNextTuple(n);
        }

        std::cout << "There are " << points->GetNumberOfPoints()
                << " points." << std::endl;


        vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
        polydata->SetPoints(points);
        //polydata->GetPointData()->SetNormals(normals);
        polydata->GetPointData()->AddArray(normals);

        vtkSmartPointer<vtkOpenGLGlyph3DMapper> Glyph3D =
vtkSmartPointer<vtkOpenGLGlyph3DMapper>::New();
        Glyph3D->SetInputData(polydata);
        Glyph3D->SetOrientationArray("normals");
        Glyph3D->SetScaleFactor(.5);
        Glyph3D->Update();

        vtkSmartPointer<vtkActor> glyph3DActor =        vtkSmartPointer<vtkActor>::New();
        glyph3DActor->SetMapper(Glyph3D);
        glyph3DActor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);

        vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
        vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
        renderWindow->AddRenderer(renderer);
        vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
        renderWindowInteractor->SetRenderWindow(renderWindow);
        renderer->AddActor(glyph3DActor);
        renderer->SetBackground(.5, .5, .5);
        renderWindow->Render();
        renderWindowInteractor->Start();
        return EXIT_SUCCESS;
}





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------------------------------

Message: 6
Date: Wed, 19 Dec 2018 02:26:23 -0700 (MST)
From: Andaharoo <Andx_roo at live.com>
To: vtkusers at vtk.org
Subject: Re: [vtkusers] Visualizing normal vectors
Message-ID: <1545211583462-0.post at n5.nabble.com>
Content-Type: text/plain; charset=us-ascii

Your error said an array index went out of bounds. What line? Also I noticed
you never set the source data for the glyph. Could be unrelated to your
current error message, but a problem.

The glyph mapper takes two inputs. The glyph data (positions, normals,
scalars, etc) and the source (thing to copy). So if you want arrows as the
normals do this:

vtkSmartPointer<vtkOpenGLGlyph3DMapper> glyph3D =
vtkSmartPointer<vtkOpenGLGlyph3DMapper>::New();
glyph3D ->SetInputData(polydata);
vtkSmartPointer<vtkArrowSource> glyphSource =
vtkSmartPointer<vtkArrowSource>::New();
glyphSource->Update();
glyph3D->SetSourceData(glyphSource->GetOutput());
glyph3D ->SetOrientationArray("normals");
glyph3D ->SetScaleFactor(0.5);
glyph3D ->Update();



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html


------------------------------

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From lasso at queensu.ca  Wed Dec 19 21:33:36 2018
From: lasso at queensu.ca (Andras Lasso)
Date: Thu, 20 Dec 2018 02:33:36 +0000
Subject: [vtkusers] vtkusers Digest, Vol 176, Issue 22
In-Reply-To: <SL2P216MB0588013C3B10C91A52A683219ABF0@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
References: <mailman.7.1545238806.28954.vtkusers@public.kitware.com>
 <SL2P216MB0588013C3B10C91A52A683219ABF0@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>
Message-ID: <YTXPR0101MB18704A013A7CD2D0A5ACD34ED8BF0@YTXPR0101MB1870.CANPRD01.PROD.OUTLOOK.COM>

It would help if you wrote a bit about yourself, your constraints, and especially what you would like to do - not just that you want VTK DLLs.

VTK is bundled with many application frameworks (ParaView, 3D Slicer, etc.), therefore - as others suggested - an obvious solution would be to use those to build your custom application. These frameworks contain not just VTK but other libraries necessary to build a complete application. You don't need any compiler, don't need to worry about GUI toolkit, etc. since all features are available and extensible using Python.

Andras

From: vtkusers <vtkusers-bounces at public.kitware.com> On Behalf Of A Z
Sent: Wednesday, December 19, 2018 8:47 PM
To: vtkusers at public.kitware.com
Subject: Re: [vtkusers] vtkusers Digest, Vol 176, Issue 22
Importance: High

I'm in a situation where I'm in a secure environment,
and I can't use Visual Studio or other sorts of tools
to compile and build the VTK.  Particularly,
this is an issue if I need VTK in 64 bit (for Windows).

The other thing is that high speed internet through
the hardware of the phone network is not all that great
where we are.  We are prepared to download the VTK once,
byt not Visual Studio, who who knows what else
Cygwin might need.  :(

What I think I simply finally and just plain need
is for the VTK to buld the 64 bit Windows .dlls for me,
and offer them for download via an internet site.

Can someone who is part of the VTK team acomplish this for me,
but for other similar members of the public as well?
________________________________
From: vtkusers <vtkusers-bounces at public.kitware.com<mailto:vtkusers-bounces at public.kitware.com>> on behalf of vtkusers-request at public.kitware.com<mailto:vtkusers-request at public.kitware.com> <vtkusers-request at public.kitware.com<mailto:vtkusers-request at public.kitware.com>>
Sent: Thursday, 20 December 2018 4:00 AM
To: vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>
Subject: vtkusers Digest, Vol 176, Issue 22

Send vtkusers mailing list submissions to
        vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>

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When replying, please edit your Subject line so it is more specific
than "Re: Contents of vtkusers digest..."


Today's Topics:

   1. Problem with displaying cross-hairs on 2D views when using
      vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack pipeline
      (ochampao)
   2. The SetRate() function of vtkFFMPEGWriter is not working
      (=?ISO-8859-1?B?eWlydWkxMjEw?=)
   3. Re: Visualizing normal vectors (Andaharoo)
   4. Re: Problem with displaying cross-hairs on 2D views when
      using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack
      pipeline (Andras Lasso)
   5. Re: Visualizing normal vectors (mozendi)
   6. Re: Visualizing normal vectors (Andaharoo)


----------------------------------------------------------------------

Message: 1
Date: Tue, 18 Dec 2018 11:40:46 -0700 (MST)
From: ochampao <ochampao at hotmail.com<mailto:ochampao at hotmail.com>>
To: vtkusers at vtk.org<mailto:vtkusers at vtk.org>
Subject: [vtkusers] Problem with displaying cross-hairs on 2D views
        when using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack
        pipeline
Message-ID: <1545158446707-0.post at n5.nabble.com<mailto:1545158446707-0.post at n5.nabble.com>>
Content-Type: text/plain; charset=us-ascii

Hi vtkUsers,

I am developing a four-pane viewer for displaying medical images. The 3
views display slices of the volumes in the 3 standard anatomical views
(axial, coronal, sagittal) whereas the 4th one displays some 3D surface
rendering of the volume. For now, I will only focus on the 2D views.

The 2D views use the following pipeline: vtkImageResliceMapper ->
vtkImageSlice -> vtkImageStack. This allows the application to overlay
slices from multiple volumes simultaneously. The attached code is a minimal
example of the 2D pipeline I use in my application. The slices displayed are
determined by the focal point of the camera in each 2D view.

What I would like to do is display a set of cross-hairs on each of the 2D
views, but I don't know how to achieve this using the pipeline I am
currently using.

I am aware of the classes:
vtkResliceCursorWidget,
vtkResliceCursor,
vtkResliceCursorLineRepresentation,
vtkImagePlaneWidget,
vtkResliceImageViewer

I have tried using these classes (see commented code in attached source
code), but they don't seem compatible with my current pipeline. For example,
when using vtkResliceCursorWidget the cross-hairs are visible and I can
interact with them but slicing stops working. I also see some weird
artefacts around the border of the slice. Also, to use these classes I need
to specify the volume which the reslice cursor will be slicing
(vtkResliceCursor->SetImage(imageData)), but in my case I have multiple
volumes.

I am also aware of and tried using vtkCursor2D/vtkCursor3D. Although they
are close to what I have in mind, they allow very limited customization of
their look.

Essentially what I would like to implement is something that looks like the
cursor of vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer
but does not handle slicing.

Can someone recommend how can I achieve this, or point me to some
classes/examples? Is their a way of using
vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer with my
current pipeline, or would I need to change it?

Thanks a lot for your help.
Panos

========================================================
Basic Pipeline Minimal Example
========================================================
#include <vtkCamera.h>
#include <vtkDICOMImageReader.h>
#include <vtkImageChangeInformation.h>
#include <vtkImageData.h>
#include <vtkImageProperty.h>
#include <vtkImageResliceMapper.h>
#include <vtkImageSlice.h>
#include <vtkImageStack.h>
#include <vtkInteractorStyleImage.h>
#include <vtkMath.h>
#include <vtkNIFTIImageReader.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>

#include <vtkResliceCursor.h>
#include <vtkResliceCursorActor.h>
#include <vtkResliceCursorLineRepresentation.h>
#include <vtkResliceCursorPolyDataAlgorithm.h>
#include <vtkResliceCursorWidget.h>

void setupCamera(vtkCamera* camera);
vtkSmartPointer<vtkImageData> loadDicom(const char* filename);
vtkSmartPointer<vtkImageData> loadNifti(const char* filename);

int main(int, char*[])
{
        // Setup renderer
        vtkNew<vtkRenderer> renderer;
        renderer->SetBackground(0.0, 0.0, 0.0);
        renderer->GetActiveCamera()->ParallelProjectionOn();
        renderer->ResetCameraClippingRange();
        renderer->ResetCamera();

        // Setup renderWindow
        vtkNew<vtkRenderWindow> renderWindow;
        renderWindow->AddRenderer(renderer);

        // Setup interaction style
        vtkNew<vtkInteractorStyleImage> interactorStyle;
        interactorStyle->SetInteractionModeToImageSlicing();

        // Setup window interactor
        vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
        renderWindowInteractor->SetRenderWindow(renderWindow);
        renderWindowInteractor->SetInteractorStyle(interactorStyle);

        // Setup camera
        setupCamera(renderer->GetActiveCamera());

        // Load data from DICOM series
//      vtkSmartPointer<vtkImageData> imageData =
//              loadDicom("<path_to_DICOM_series>"");

        // Load data from Nifti file
        vtkSmartPointer<vtkImageData> imageData =
                loadNifti("<path_to_nii_file>");

        // setup slice mapper
        vtkNew<vtkImageResliceMapper> resliceMapper;
        resliceMapper->SetInputData(imageData);
        resliceMapper->SliceFacesCameraOn();
        resliceMapper->SliceAtFocalPointOn();
        resliceMapper->JumpToNearestSliceOn();
        resliceMapper->BorderOff();

        // Set to full window and centered level:
        double window = imageData->GetScalarRange()[1] -
imageData->GetScalarRange()[0];
        double level = imageData->GetScalarRange()[0] + window / 2.0;

        // Setup prop holding the slice
        vtkNew<vtkImageSlice> imageSlice;
        imageSlice->SetMapper(resliceMapper);
        imageSlice->GetProperty()->SetColorWindow(window);
        imageSlice->GetProperty()->SetColorLevel(level);
        imageSlice->GetProperty()->SetLayerNumber(0);
        imageSlice->GetProperty()->SetInterpolationTypeToNearest();

        // Setup prop holding the multiple slices
        vtkNew<vtkImageStack> imageStack;
        imageStack->SetActiveLayer(imageSlice->GetProperty()->GetLayerNumber());
        imageStack->AddImage(imageSlice); // add slice

        vtkNew<vtkResliceCursor> resliceCursor;
        resliceCursor->SetCenter(imageData->GetCenter());
        resliceCursor->SetThickMode(0);
        resliceCursor->SetImage(imageData);

        vtkNew<vtkResliceCursorLineRepresentation> cursorRepresentation;
        cursorRepresentation->GetResliceCursorActor()->
           GetCursorAlgorithm()->SetResliceCursor(resliceCursor);
        cursorRepresentation->GetResliceCursorActor()->
            BasicPipeline.cxx
<http://vtk.1045678.n5.nabble.com/file/t341857/BasicPipeline.cxx<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fvtk.1045678.n5.nabble.com%2Ffile%2Ft341857%2FBasicPipeline.cxx&data=02%7C01%7Classo%40queensu.ca%7Cfedd9df10c424535884b08d6661d02be%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636808672163032570&sdata=aPM215BfRYQdhtY2KpItrlC4x0wlNWOMeAHxs81q74o%3D&reserved=0>>
GetCursorAlgorithm()->SetReslicePlaneNormal(2);

        vtkNew<vtkResliceCursorWidget> resliceCursorWidget;
        resliceCursorWidget->SetInteractor(renderWindowInteractor);
        resliceCursorWidget->SetDefaultRenderer(renderer);
        resliceCursorWidget->SetRepresentation(cursorRepresentation);
        resliceCursorWidget->SetManageWindowLevel(false);
        resliceCursorWidget->EnabledOn();
        //resliceCursorWidget->ProcessEventsOff();

        // Add actors to renderer
        renderer->AddViewProp(imageStack);
        renderer->ResetCamera();

        // Start interaction
        renderWindowInteractor->Initialize();
        renderWindow->Render();
        renderWindowInteractor->Start();

        return EXIT_SUCCESS;
}

void setupCamera(vtkCamera* camera)
{
        double viewUp[3] = { 0, 1, 0 };
        double leftToRight[3] = { 1, 0, 0 };

        // compute the view plane normal
        double normal[3];
        vtkMath::Cross(leftToRight, viewUp, normal);

        // get the camera focus
        double focus[3];
        camera->GetFocalPoint(focus);

        // get the camera distance from the focus
        double d = camera->GetDistance();

        // position the camera on view plane normal keeping the focus and the
distance from it fixed
        camera->SetPosition(
                focus[0] + d*normal[0],
                focus[1] + d*normal[1],
                focus[2] + d*normal[2]);

        // make sure focus is the same
        camera->SetFocalPoint(focus);

        // setup view up vector
        camera->SetViewUp(viewUp);
        camera->OrthogonalizeViewUp();
}

vtkSmartPointer<vtkImageData> loadDicom(const char* filename)
{
        vtkNew<vtkDICOMImageReader> reader;
        reader->FileLowerLeftOn();
        reader->SetDirectoryName(filename);
        reader->UpdateInformation();

        vtkNew<vtkImageChangeInformation> imageInfo;
        imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
        imageInfo->SetOutputSpacing(reader->GetPixelSpacing());
        imageInfo->SetInputConnection(reader->GetOutputPort());
        imageInfo->Update();

        return imageInfo->GetOutput();
}

vtkSmartPointer<vtkImageData> loadNifti(const char* filename)
{
        vtkNew<vtkNIFTIImageReader> niftiiReader;
        niftiiReader->SetFileName(filename);

        vtkNew<vtkImageChangeInformation> imageInfo;
        imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
        imageInfo->SetInputConnection(niftiiReader->GetOutputPort());
        imageInfo->Update();

        return imageInfo->GetOutput();//data;
}





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------------------------------

Message: 2
Date: Wed, 19 Dec 2018 08:25:13 +0800
From: "=?ISO-8859-1?B?eWlydWkxMjEw?=" <523480317 at qq.com<mailto:523480317 at qq.com>>
To: "=?ISO-8859-1?B?dnRrdXNlcnM=?=" <vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>>
Subject: [vtkusers] The SetRate() function of vtkFFMPEGWriter is not
        working
Message-ID: <tencent_C1E9E5F99AB683BA70FF9EF4DCFA1923C109 at qq.com<mailto:tencent_C1E9E5F99AB683BA70FF9EF4DCFA1923C109 at qq.com>>
Content-Type: text/plain; charset="iso-8859-1"

Hello, VTKer


I am using vtkFFMPEGWriter to write a video, no matter the frame rate I set, the output video is still 600 frames/sec.

The code I used has been attached. Can anybody check the problem for me? Thank you so much.


Regards,
YiRui
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------------------------------

Message: 3
Date: Tue, 18 Dec 2018 18:37:04 -0700 (MST)
From: Andaharoo <Andx_roo at live.com<mailto:Andx_roo at live.com>>
To: vtkusers at vtk.org<mailto:vtkusers at vtk.org>
Subject: Re: [vtkusers] Visualizing normal vectors
Message-ID: <1545183424782-0.post at n5.nabble.com<mailto:1545183424782-0.post at n5.nabble.com>>
Content-Type: text/plain; charset=us-ascii

I'd recommend using vtkOpenGLGlyph3DMapper instead. Much faster, assuming you
have some gpu. Just make sure the normal array/orientation array is in the
input polyData's point data.

IE:
polyData->GetPointData()->AddArray(your normal array)

Then just specify the array the mapper should use with
SetOrientationArray(your arrays name here). It will then search for the
array in the input polydata. I frequently use this to draw thousands of
oriented arrows with VTK.



--
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------------------------------

Message: 4
Date: Wed, 19 Dec 2018 06:31:31 +0000
From: Andras Lasso <lasso at queensu.ca<mailto:lasso at queensu.ca>>
To: ochampao <ochampao at hotmail.com<mailto:ochampao at hotmail.com>>, "vtkusers at vtk.org<mailto:vtkusers at vtk.org>"
        <vtkusers at vtk.org<mailto:vtkusers at vtk.org>>
Subject: Re: [vtkusers] Problem with displaying cross-hairs on 2D
        views when using vtkImageResliceMapper -> vtkImageSlice ->
        vtkImageStack pipeline
Message-ID:
        <YTXPR0101MB1870ABE4ABBF6595CEEDB4FDD8BE0 at YTXPR0101MB1870.CANPRD01.PROD.OUTLOOK.COM<mailto:YTXPR0101MB1870ABE4ABBF6595CEEDB4FDD8BE0 at YTXPR0101MB1870.CANPRD01.PROD.OUTLOOK.COM>>

Content-Type: text/plain; charset="us-ascii"

It is great that you are interested in medical imaging and has chosen to work with VTK. I would recommend to put your talent and effort into contributing to an existing open-source medical image viewer instead of spending time with redeveloping basic features. You could work on more interesting things, develop new features, and you would very quickly become a useful, valued member of a community.

If you are interested in answers to your question (and your future questions) you can have a look at source code of existing VTK-based open-source medical image viewers, such as 3D Slicer, MITK, medInria, Horos, Ibis, CustusX, CamiTK, Invesalius, etc.

Andras

-----Original Message-----
From: vtkusers <vtkusers-bounces at public.kitware.com<mailto:vtkusers-bounces at public.kitware.com>> On Behalf Of ochampao
Sent: Tuesday, December 18, 2018 1:41 PM
To: vtkusers at vtk.org<mailto:vtkusers at vtk.org>
Subject: [vtkusers] Problem with displaying cross-hairs on 2D views when using vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack pipeline

Hi vtkUsers,

I am developing a four-pane viewer for displaying medical images. The 3 views display slices of the volumes in the 3 standard anatomical views (axial, coronal, sagittal) whereas the 4th one displays some 3D surface rendering of the volume. For now, I will only focus on the 2D views.

The 2D views use the following pipeline: vtkImageResliceMapper -> vtkImageSlice -> vtkImageStack. This allows the application to overlay slices from multiple volumes simultaneously. The attached code is a minimal example of the 2D pipeline I use in my application. The slices displayed are determined by the focal point of the camera in each 2D view.

What I would like to do is display a set of cross-hairs on each of the 2D views, but I don't know how to achieve this using the pipeline I am currently using.

I am aware of the classes:
vtkResliceCursorWidget,
vtkResliceCursor,
vtkResliceCursorLineRepresentation,
vtkImagePlaneWidget,
vtkResliceImageViewer

I have tried using these classes (see commented code in attached source code), but they don't seem compatible with my current pipeline. For example, when using vtkResliceCursorWidget the cross-hairs are visible and I can interact with them but slicing stops working. I also see some weird artefacts around the border of the slice. Also, to use these classes I need to specify the volume which the reslice cursor will be slicing (vtkResliceCursor->SetImage(imageData)), but in my case I have multiple volumes.

I am also aware of and tried using vtkCursor2D/vtkCursor3D. Although they are close to what I have in mind, they allow very limited customization of their look.

Essentially what I would like to implement is something that looks like the cursor of vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer
but does not handle slicing.

Can someone recommend how can I achieve this, or point me to some classes/examples? Is their a way of using vtkResliceCursorWidget/vtkImagePlaneWidget/vtkResliceImageViewer with my current pipeline, or would I need to change it?

Thanks a lot for your help.
Panos

========================================================
Basic Pipeline Minimal Example
========================================================
#include <vtkCamera.h>
#include <vtkDICOMImageReader.h>
#include <vtkImageChangeInformation.h>
#include <vtkImageData.h>
#include <vtkImageProperty.h>
#include <vtkImageResliceMapper.h>
#include <vtkImageSlice.h>
#include <vtkImageStack.h>
#include <vtkInteractorStyleImage.h>
#include <vtkMath.h>
#include <vtkNIFTIImageReader.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkSmartPointer.h>

#include <vtkResliceCursor.h>
#include <vtkResliceCursorActor.h>
#include <vtkResliceCursorLineRepresentation.h>
#include <vtkResliceCursorPolyDataAlgorithm.h>
#include <vtkResliceCursorWidget.h>

void setupCamera(vtkCamera* camera);
vtkSmartPointer<vtkImageData> loadDicom(const char* filename); vtkSmartPointer<vtkImageData> loadNifti(const char* filename);

int main(int, char*[])
{
        // Setup renderer
        vtkNew<vtkRenderer> renderer;
        renderer->SetBackground(0.0, 0.0, 0.0);
        renderer->GetActiveCamera()->ParallelProjectionOn();
        renderer->ResetCameraClippingRange();
        renderer->ResetCamera();

        // Setup renderWindow
        vtkNew<vtkRenderWindow> renderWindow;
        renderWindow->AddRenderer(renderer);

        // Setup interaction style
        vtkNew<vtkInteractorStyleImage> interactorStyle;
        interactorStyle->SetInteractionModeToImageSlicing();

        // Setup window interactor
        vtkNew<vtkRenderWindowInteractor> renderWindowInteractor;
        renderWindowInteractor->SetRenderWindow(renderWindow);
        renderWindowInteractor->SetInteractorStyle(interactorStyle);

        // Setup camera
        setupCamera(renderer->GetActiveCamera());

        // Load data from DICOM series
//      vtkSmartPointer<vtkImageData> imageData =
//              loadDicom("<path_to_DICOM_series>"");

        // Load data from Nifti file
        vtkSmartPointer<vtkImageData> imageData =
                loadNifti("<path_to_nii_file>");

        // setup slice mapper
        vtkNew<vtkImageResliceMapper> resliceMapper;
        resliceMapper->SetInputData(imageData);
        resliceMapper->SliceFacesCameraOn();
        resliceMapper->SliceAtFocalPointOn();
        resliceMapper->JumpToNearestSliceOn();
        resliceMapper->BorderOff();

        // Set to full window and centered level:
        double window = imageData->GetScalarRange()[1] -
imageData->GetScalarRange()[0];
        double level = imageData->GetScalarRange()[0] + window / 2.0;

        // Setup prop holding the slice
        vtkNew<vtkImageSlice> imageSlice;
        imageSlice->SetMapper(resliceMapper);
        imageSlice->GetProperty()->SetColorWindow(window);
        imageSlice->GetProperty()->SetColorLevel(level);
        imageSlice->GetProperty()->SetLayerNumber(0);
        imageSlice->GetProperty()->SetInterpolationTypeToNearest();

        // Setup prop holding the multiple slices
        vtkNew<vtkImageStack> imageStack;
        imageStack->SetActiveLayer(imageSlice->GetProperty()->GetLayerNumber());
        imageStack->AddImage(imageSlice); // add slice

        vtkNew<vtkResliceCursor> resliceCursor;
        resliceCursor->SetCenter(imageData->GetCenter());
        resliceCursor->SetThickMode(0);
        resliceCursor->SetImage(imageData);

        vtkNew<vtkResliceCursorLineRepresentation> cursorRepresentation;
        cursorRepresentation->GetResliceCursorActor()->
           GetCursorAlgorithm()->SetResliceCursor(resliceCursor);
        cursorRepresentation->GetResliceCursorActor()->
            BasicPipeline.cxx
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GetCursorAlgorithm()->SetReslicePlaneNormal(2);

        vtkNew<vtkResliceCursorWidget> resliceCursorWidget;
        resliceCursorWidget->SetInteractor(renderWindowInteractor);
        resliceCursorWidget->SetDefaultRenderer(renderer);
        resliceCursorWidget->SetRepresentation(cursorRepresentation);
        resliceCursorWidget->SetManageWindowLevel(false);
        resliceCursorWidget->EnabledOn();
        //resliceCursorWidget->ProcessEventsOff();

        // Add actors to renderer
        renderer->AddViewProp(imageStack);
        renderer->ResetCamera();

        // Start interaction
        renderWindowInteractor->Initialize();
        renderWindow->Render();
        renderWindowInteractor->Start();

        return EXIT_SUCCESS;
}

void setupCamera(vtkCamera* camera)
{
        double viewUp[3] = { 0, 1, 0 };
        double leftToRight[3] = { 1, 0, 0 };

        // compute the view plane normal
        double normal[3];
        vtkMath::Cross(leftToRight, viewUp, normal);

        // get the camera focus
        double focus[3];
        camera->GetFocalPoint(focus);

        // get the camera distance from the focus
        double d = camera->GetDistance();

        // position the camera on view plane normal keeping the focus and the distance from it fixed
        camera->SetPosition(
                focus[0] + d*normal[0],
                focus[1] + d*normal[1],
                focus[2] + d*normal[2]);

        // make sure focus is the same
        camera->SetFocalPoint(focus);

        // setup view up vector
        camera->SetViewUp(viewUp);
        camera->OrthogonalizeViewUp();
}

vtkSmartPointer<vtkImageData> loadDicom(const char* filename) {
        vtkNew<vtkDICOMImageReader> reader;
        reader->FileLowerLeftOn();
        reader->SetDirectoryName(filename);
        reader->UpdateInformation();

        vtkNew<vtkImageChangeInformation> imageInfo;
        imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
        imageInfo->SetOutputSpacing(reader->GetPixelSpacing());
        imageInfo->SetInputConnection(reader->GetOutputPort());
        imageInfo->Update();

        return imageInfo->GetOutput();
}

vtkSmartPointer<vtkImageData> loadNifti(const char* filename) {
        vtkNew<vtkNIFTIImageReader> niftiiReader;
        niftiiReader->SetFileName(filename);

        vtkNew<vtkImageChangeInformation> imageInfo;
        imageInfo->SetOutputOrigin(0.0, 0.0, 0.0);
        imageInfo->SetInputConnection(niftiiReader->GetOutputPort());
        imageInfo->Update();

        return imageInfo->GetOutput();//data;
}





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------------------------------

Message: 5
Date: Wed, 19 Dec 2018 01:24:28 -0700 (MST)
From: mozendi <mozendi at gmail.com<mailto:mozendi at gmail.com>>
To: vtkusers at vtk.org<mailto:vtkusers at vtk.org>
Subject: Re: [vtkusers] Visualizing normal vectors
Message-ID: <1545207868212-0.post at n5.nabble.com<mailto:1545207868212-0.post at n5.nabble.com>>
Content-Type: text/plain; charset=us-ascii

Dear Andaharoo,
Thank you for your recommendation. I tried to modify my codes according to
your recommendations, my code is getting compiled successfully. However,
when I run it I am getting an error message. The screenshot and my code are
below. Could you please tell me what is wrong with my code?
Thanks in advance
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#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkDelimitedTextReader.h>
#include <vtkDoubleArray.h>
#include <vtkTable.h>
#include <vtkPointData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkVertexGlyphFilter.h>
#include <vtkArrowSource.h>
#include <vtkGlyph3D.h>
#include <vtkPointSource.h>
# include "vtkGlyph3DMapper.h"
# include "vtkGlyph3DMapper.h"
#include <vtkOpenGLGlyph3DMapper.h>
#include <vector>


int main(int argc, char* argv[])
{
        vtkSmartPointer<vtkDelimitedTextReader> reader =
vtkSmartPointer<vtkDelimitedTextReader>::New();
        reader->SetFileName("points_and_normals.xyz");
        reader->DetectNumericColumnsOn();
        reader->SetFieldDelimiterCharacters(" ");
        reader->Update();

        vtkTable* table = reader->GetOutput();
        vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
        vtkSmartPointer<vtkDoubleArray> normals =
vtkSmartPointer<vtkDoubleArray>::New();
        normals->SetNumberOfComponents(3); //3d normals (ie x,y,z)

        std::cout << "Table has " << table->GetNumberOfRows()
                << " rows." << std::endl;
        std::cout << "Table has " << table->GetNumberOfColumns()
                << " columns." << std::endl;

        for (vtkIdType i = 0; i < table->GetNumberOfRows(); i++)
        {

                points->InsertNextPoint((table->GetValue(i, 0)).ToDouble(),
                        (table->GetValue(i, 1)).ToDouble(),
                        (table->GetValue(i, 2)).ToDouble());

                double n[3];
                n[0] = (table->GetValue(i, 3)).ToDouble();
                n[1] = (table->GetValue(i, 4)).ToDouble();
                n[2] = (table->GetValue(i, 5)).ToDouble();
                normals->InsertNextTuple(n);
        }

        std::cout << "There are " << points->GetNumberOfPoints()
                << " points." << std::endl;


        vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
        polydata->SetPoints(points);
        //polydata->GetPointData()->SetNormals(normals);
        polydata->GetPointData()->AddArray(normals);

        vtkSmartPointer<vtkOpenGLGlyph3DMapper> Glyph3D =
vtkSmartPointer<vtkOpenGLGlyph3DMapper>::New();
        Glyph3D->SetInputData(polydata);
        Glyph3D->SetOrientationArray("normals");
        Glyph3D->SetScaleFactor(.5);
        Glyph3D->Update();

        vtkSmartPointer<vtkActor> glyph3DActor =        vtkSmartPointer<vtkActor>::New();
        glyph3DActor->SetMapper(Glyph3D);
        glyph3DActor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);

        vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
        vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
        renderWindow->AddRenderer(renderer);
        vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
        renderWindowInteractor->SetRenderWindow(renderWindow);
        renderer->AddActor(glyph3DActor);
        renderer->SetBackground(.5, .5, .5);
        renderWindow->Render();
        renderWindowInteractor->Start();
        return EXIT_SUCCESS;
}





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------------------------------

Message: 6
Date: Wed, 19 Dec 2018 02:26:23 -0700 (MST)
From: Andaharoo <Andx_roo at live.com<mailto:Andx_roo at live.com>>
To: vtkusers at vtk.org<mailto:vtkusers at vtk.org>
Subject: Re: [vtkusers] Visualizing normal vectors
Message-ID: <1545211583462-0.post at n5.nabble.com<mailto:1545211583462-0.post at n5.nabble.com>>
Content-Type: text/plain; charset=us-ascii

Your error said an array index went out of bounds. What line? Also I noticed
you never set the source data for the glyph. Could be unrelated to your
current error message, but a problem.

The glyph mapper takes two inputs. The glyph data (positions, normals,
scalars, etc) and the source (thing to copy). So if you want arrows as the
normals do this:

vtkSmartPointer<vtkOpenGLGlyph3DMapper> glyph3D =
vtkSmartPointer<vtkOpenGLGlyph3DMapper>::New();
glyph3D ->SetInputData(polydata);
vtkSmartPointer<vtkArrowSource> glyphSource =
vtkSmartPointer<vtkArrowSource>::New();
glyphSource->Update();
glyph3D->SetSourceData(glyphSource->GetOutput());
glyph3D ->SetOrientationArray("normals");
glyph3D ->SetScaleFactor(0.5);
glyph3D ->Update();



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------------------------------

End of vtkusers Digest, Vol 176, Issue 22
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From famous.osarobo at gmail.com  Thu Dec 20 06:50:41 2018
From: famous.osarobo at gmail.com (Osarobo Famous Okhuahesogie)
Date: Thu, 20 Dec 2018 11:50:41 +0000
Subject: [vtkusers] How to set maximum error in vtkQuadricDecimation ?
Message-ID: <CAAFWPjo_V-1GnTWMeyzT4AZOnoT-vp4+udRb_OykLO=+8T8FMg@mail.gmail.com>

Hi All,

I have been trying out vtkDecimatePro and vtkQuadricDecimation for about a
month now with some success. The only problem I have is I am not able to
set the tolerance or maximum error when using vtkQuadricDecimation. Is
there a similar function like SetMaximumError(max_error) in
vtkQuadricDecimation as there is in vtkDecimatePro ? Or is there a way to
control the tolerance I am not aware of ?. I will appreciate any help.

Kind Regards

Famous
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From david.thompson at kitware.com  Thu Dec 20 14:25:10 2018
From: david.thompson at kitware.com (David Thompson)
Date: Thu, 20 Dec 2018 14:25:10 -0500
Subject: [vtkusers] Help with vtkInterpolateDataSetAttributes
In-Reply-To: <D9709FED-CD5A-454A-BFFE-E689430B194A@inl.gov>
References: <F948DFBF-F7DD-488E-ADE4-3C3326A834C3@inl.gov>
 <CADZJ4hMhJs=sH2FVhq=djKJ-6awNMETkLbxyuyAxyrjUhwGVvw@mail.gmail.com>
 <01535852-F548-4E8A-A2AF-04F7F4476DEB@inl.gov>
 <CADZJ4hPh=WaA8K_tmtrwWoq9UgffO3ka2uXdBBAYwc6QBC0GXA@mail.gmail.com>
 <D9709FED-CD5A-454A-BFFE-E689430B194A@inl.gov>
Message-ID: <FA8BB63D-8861-469E-A6B3-477C525474F0@kitware.com>

Hi Andrew,

> The interpolation for point data is working great, I am working on making my script more robust before posting by including cell and global data to the interpolation. I also am interpolating all active data into a vtkMultiBlockDataSetAlgorithm so the end product will behave similarly as a vtkExodusIIReader object.
> 
> Anyway, I can't get the cell data to interpolate. The point data is working fine (change the variable to 'point') to show this result.

It would help to know more about what you hope to accomplish with the interpolation. If you are trying to compare field values (or differences between them) on different meshes, then maybe it would be appropriate as a first pass to use vtkCellCenters to get a location for each cell.

You might also be interested in the vtkProbeFilter for projecting points (whether they are cell centers or original input points) from one dataset to another without writing a Python script that iterates over tuples.

	David

From adriaan.s at gmail.com  Thu Dec 20 17:02:16 2018
From: adriaan.s at gmail.com (Adriaan)
Date: Thu, 20 Dec 2018 23:02:16 +0100
Subject: [vtkusers] Install Mayavi for Python 3.7.1 in Windows 10
Message-ID: <440d8ddd-2973-cd93-5d3f-905f2c96c145@gmail.com>

Dear Kitware.

I'm trying to install VTK for Python 3.7.1 on Windows 10 but running 
<<pip install vtk>> gives me

<<
Collecting vtk
 ? Could not find a version that satisfies the requirement vtk (from 
versions: )
No matching distribution found for vtk
 >>

I installed VTK manually with 
<<https://www.vtk.org/files/release/7.1/vtkpython-7.1.1-Windows-64bit.exe>> 
but it does not solve the problem.

Running python --version returns Python 3.7.1 and running pip --version 
or pip3 --version returns pip 18.1 from 
c:\users\adria\appdata\local\programs\python\python37-32\lib\site-packages\pip 
(python 3.7).

How do I solve this problem?

Thanks,

Adriaan

From zwtfire at 126.com  Thu Dec 20 22:04:22 2018
From: zwtfire at 126.com (wtzou)
Date: Fri, 21 Dec 2018 11:04:22 +0800 (CST)
Subject: [vtkusers] catastrophic error: cannot open source file
 "vtkVolumeRayCastMIPFunction.h"
Message-ID: <4185bd91.2f1e.167ceb8932d.Coremail.zwtfire@126.com>

Hi,
When I was using  molecular simulation software RASPA2, the error was met when compile the result visulization .cxx file.
here is my selection while install VTK-8.1.2.
 

and this is the error information:


what shall I do ?
Thank you very much




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From poweruserm at live.com.au  Fri Dec 21 00:16:49 2018
From: poweruserm at live.com.au (A Z)
Date: Fri, 21 Dec 2018 05:16:49 +0000
Subject: [vtkusers] vtkusers Digest, Vol 176, Issue 25
In-Reply-To: <mailman.118.1545361467.2633.vtkusers@vtk.org>
References: <mailman.118.1545361467.2633.vtkusers@vtk.org>
Message-ID: <SL2P216MB058851A7AD73B5A985F253589AB80@SL2P216MB0588.KORP216.PROD.OUTLOOK.COM>

I still remain in the position of being unable to build the VTK for my purposes.

We am using the 64 bit TDM C++ compiler and need to compile into 64 bit Windows .dlls.

Is it possible to organise this from the VTK team, for a public download?

________________________________
From: vtkusers <vtkusers-bounces at vtk.org> on behalf of vtkusers-request at vtk.org <vtkusers-request at vtk.org>
Sent: Friday, 21 December 2018 2:04 PM
To: vtkusers at vtk.org
Subject: vtkusers Digest, Vol 176, Issue 25

Send vtkusers mailing list submissions to
        vtkusers at vtk.org

To subscribe or unsubscribe via the World Wide Web, visit
        https://vtk.org/mailman/listinfo/vtkusers
or, via email, send a message with subject or body 'help' to
        vtkusers-request at vtk.org

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        vtkusers-owner at vtk.org

When replying, please edit your Subject line so it is more specific
than "Re: Contents of vtkusers digest..."


Today's Topics:

   1. Re: Help with vtkInterpolateDataSetAttributes (David Thompson)
   2. Install Mayavi for Python 3.7.1 in Windows 10 (Adriaan)
   3. catastrophic error: cannot open source file
      "vtkVolumeRayCastMIPFunction.h" (wtzou)


----------------------------------------------------------------------

Message: 1
Date: Thu, 20 Dec 2018 14:25:10 -0500
From: David Thompson <david.thompson at kitware.com>
To: "Andrew E. Slaughter" <andrew.slaughter at inl.gov>
Cc: vtkusers <vtkusers at vtk.org>
Subject: Re: [vtkusers] Help with vtkInterpolateDataSetAttributes
Message-ID: <FA8BB63D-8861-469E-A6B3-477C525474F0 at kitware.com>
Content-Type: text/plain;       charset=us-ascii

Hi Andrew,

> The interpolation for point data is working great, I am working on making my script more robust before posting by including cell and global data to the interpolation. I also am interpolating all active data into a vtkMultiBlockDataSetAlgorithm so the end product will behave similarly as a vtkExodusIIReader object.
>
> Anyway, I can't get the cell data to interpolate. The point data is working fine (change the variable to 'point') to show this result.

It would help to know more about what you hope to accomplish with the interpolation. If you are trying to compare field values (or differences between them) on different meshes, then maybe it would be appropriate as a first pass to use vtkCellCenters to get a location for each cell.

You might also be interested in the vtkProbeFilter for projecting points (whether they are cell centers or original input points) from one dataset to another without writing a Python script that iterates over tuples.

        David

------------------------------

Message: 2
Date: Thu, 20 Dec 2018 23:02:16 +0100
From: Adriaan <adriaan.s at gmail.com>
To: vtkusers at vtk.org
Subject: [vtkusers] Install Mayavi for Python 3.7.1 in Windows 10
Message-ID: <440d8ddd-2973-cd93-5d3f-905f2c96c145 at gmail.com>
Content-Type: text/plain; charset=utf-8; format=flowed

Dear Kitware.

I'm trying to install VTK for Python 3.7.1 on Windows 10 but running
<<pip install vtk>> gives me

<<
Collecting vtk
 ? Could not find a version that satisfies the requirement vtk (from
versions: )
No matching distribution found for vtk
 >>

I installed VTK manually with
<<https://www.vtk.org/files/release/7.1/vtkpython-7.1.1-Windows-64bit.exe>>
but it does not solve the problem.

Running python --version returns Python 3.7.1 and running pip --version
or pip3 --version returns pip 18.1 from
c:\users\adria\appdata\local\programs\python\python37-32\lib\site-packages\pip
(python 3.7).

How do I solve this problem?

Thanks,

Adriaan


------------------------------

Message: 3
Date: Fri, 21 Dec 2018 11:04:22 +0800 (CST)
From: wtzou <zwtfire at 126.com>
To: vtkusers at vtk.org
Subject: [vtkusers] catastrophic error: cannot open source file
        "vtkVolumeRayCastMIPFunction.h"
Message-ID: <4185bd91.2f1e.167ceb8932d.Coremail.zwtfire at 126.com>
Content-Type: text/plain; charset="gbk"

Hi,
When I was using  molecular simulation software RASPA2, the error was met when compile the result visulization .cxx file.
here is my selection while install VTK-8.1.2.


and this is the error information:


what shall I do ?
Thank you very much




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------------------------------

Subject: Digest Footer

_______________________________________________
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From mozendi at gmail.com  Fri Dec 21 03:29:54 2018
From: mozendi at gmail.com (mozendi)
Date: Fri, 21 Dec 2018 01:29:54 -0700 (MST)
Subject: [vtkusers] Visualizing normal vectors
In-Reply-To: <1545211583462-0.post@n5.nabble.com>
References: <1544904178474-0.post@n5.nabble.com>
 <1545183424782-0.post@n5.nabble.com> <1545207868212-0.post@n5.nabble.com>
 <1545211583462-0.post@n5.nabble.com>
Message-ID: <1545380994609-0.post@n5.nabble.com>

Dear Andaharoo,

Thank you very much for recommendations. My code works successfully and it
runs quite fast. 
I have one more question. Is it possible to set width of arrows? I can scale
it using SetScaleFactor(). I tried SetTipLength and SetTipRadius but
dimensions did not change. 
Thanks in advance

#include <vtkVersion.h>
#include <vtkSmartPointer.h>
#include <vtkProperty.h>
#include <vtkPolyDataMapper.h>
#include <vtkActor.h>
#include <vtkDelimitedTextReader.h>
#include <vtkDoubleArray.h>
#include <vtkTable.h>
#include <vtkPointData.h>
#include <vtkRenderWindow.h>
#include <vtkRenderWindowInteractor.h>
#include <vtkRenderer.h>
#include <vtkVertexGlyphFilter.h>
#include <vtkArrowSource.h>
#include <vtkGlyph3D.h>
#include <vtkPointSource.h>
# include "vtkGlyph3DMapper.h"
#include <vtkOpenGLGlyph3DMapper.h>
#include <vector>


int main(int argc, char* argv[])
{
	vtkSmartPointer<vtkDelimitedTextReader> reader =
vtkSmartPointer<vtkDelimitedTextReader>::New();
	reader->SetFileName("dene_sil.xyz");
	reader->DetectNumericColumnsOn();
	reader->SetFieldDelimiterCharacters(" ");
	reader->Update();

	vtkTable* table = reader->GetOutput();
	vtkSmartPointer<vtkPoints> points = vtkSmartPointer<vtkPoints>::New();
	vtkSmartPointer<vtkDoubleArray> normals =
vtkSmartPointer<vtkDoubleArray>::New();
	normals->SetName("NORMALS");
	normals->SetNumberOfComponents(3); //3d normals (ie x,y,z)

	std::cout << "Table has " << table->GetNumberOfRows()
		<< " rows." << std::endl;
	std::cout << "Table has " << table->GetNumberOfColumns()
		<< " columns." << std::endl;

	for (vtkIdType i = 0; i < table->GetNumberOfRows(); i++)
	{

		points->InsertNextPoint((table->GetValue(i, 0)).ToDouble(),
			(table->GetValue(i, 1)).ToDouble(),
			(table->GetValue(i, 2)).ToDouble());

		double n[3];
		n[0] = (table->GetValue(i, 3)).ToDouble();
		n[1] = (table->GetValue(i, 4)).ToDouble();
		n[2] = (table->GetValue(i, 5)).ToDouble();
		normals->InsertNextTuple(n);
	}

	std::cout << "There are " << points->GetNumberOfPoints()
		<< " points." << std::endl;

	vtkSmartPointer<vtkPolyData> polydata =
vtkSmartPointer<vtkPolyData>::New();
	polydata->SetPoints(points);
	//polydata->GetPointData()->SetNormals(normals);
	polydata->GetPointData()->AddArray(normals);

	vtkSmartPointer<vtkOpenGLGlyph3DMapper> Glyph3D =
vtkSmartPointer<vtkOpenGLGlyph3DMapper>::New();
	Glyph3D->SetInputData(polydata);

	double pp[3];
	polydata->GetPoint(1, pp);
	std::cout << "deneme = " << 1 << " : (" << pp[0] << " " << pp[1] << " " <<
pp[2] << ")" << std::endl;
	
	std::cout << "There are " << polydata->GetPointData()->GetNumberOfArrays()
<< " arrays." << std::endl;
	std::cout << "name: " << polydata->GetPointData()->GetArrayName(0) <<
std::endl;
	
	vtkSmartPointer<vtkArrowSource> glyphSource =
vtkSmartPointer<vtkArrowSource>::New();
	glyphSource->Update();
	//glyphSource->SetTipResolution(5);
	glyphSource->SetTipLength(0.01);
	glyphSource->SetTipRadius(0.01);
	
	vtkSmartPointer<vtkActor> glyph3DActor = vtkSmartPointer<vtkActor>::New();
	glyph3DActor->SetMapper(Glyph3D);
	glyph3DActor->GetProperty()->SetColor(0.8900, 0.8100, 0.3400);
	glyph3DActor->GetProperty()->SetLineWidth(0.01);

	Glyph3D->SetSourceData(glyphSource->GetOutput());
	Glyph3D->OrientOn();
	Glyph3D->SetOrientationArray("NORMALS");
	Glyph3D->SetScaleFactor(0.03);
	Glyph3D->Update();
	
	vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
	vtkSmartPointer<vtkRenderWindow> renderWindow =
vtkSmartPointer<vtkRenderWindow>::New();
	renderWindow->AddRenderer(renderer);
	vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
vtkSmartPointer<vtkRenderWindowInteractor>::New();
	renderWindowInteractor->SetRenderWindow(renderWindow);
	renderer->AddActor(glyph3DActor);
	renderer->SetBackground(.5, .5, .5);
	renderWindow->Render();
	renderWindowInteractor->Start();
	return EXIT_SUCCESS;
}




--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From zs6115 at student.uni-lj.si  Sat Dec 22 13:23:04 2018
From: zs6115 at student.uni-lj.si (the_not)
Date: Sat, 22 Dec 2018 11:23:04 -0700 (MST)
Subject: [vtkusers] Clarification about RequestData methods
Message-ID: <1545502984499-0.post@n5.nabble.com>

I am reading the VTKTextbook. On page 112 (physical page 128) it says:

/Now let?s reexamine the same process of pipeline execution by following
method invocation. The process begins when
the actor receives a Render() message from a renderer. The actor in turn
sends a Render() message to its mapper. The
mapper begins network execution by asking its input to update itself via the
Update() operation. This causes a cascade
of Update() methods as each filter in turn asks its input to update itself.
If branching in the pipeline is present, the
update method will branch as well. Finally, the cascade terminates when a
source object is encountered. If the source
object is out of date, it will send itself an RequestData() command. Each
filter will send itself an RequestData() as
necessary to bring itself up to date. Finally, the mapper will perform
operations to transform its input into rendering
primitives./

<http://vtk.1045678.n5.nabble.com/file/t342660/2018-12-22_19-17-28_screenshot.png> 

It is clear how Update() mehods get propagated towards the Source, as each
"node" in the network asks its input to update. Following the text above, it
says that the cascade terminates when the source is reached. It than sends
itself RequestData command, if it is out of date. But the text than goes to
say " Each filter will send itself an RequestData()" if needed. 

How do filters know to call RequestData on themselves? With Update, it is
clear, as each filter asks its input to update. This flows upstream to the
source. But than if only the source asks itself to RequestData, how do
filters downstream from it know to do so aswell?

I hope I made my question clear, I thank you in advance.



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From elhassan.abdou at gmail.com  Sat Dec 22 17:01:35 2018
From: elhassan.abdou at gmail.com (Elhassan Abdou)
Date: Sat, 22 Dec 2018 23:01:35 +0100
Subject: [vtkusers] construct from vtkCamera from opengl Variables
Message-ID: <CAK-92qB4X7XTH91BccgF1vV1J61hYb--ipSm5bRLepnUrn7M5g@mail.gmail.com>

Dear All,

I have a scene that I constructed using OpenGL and I want to rewrite the
code using VTK.
So I have view matrix (compose of, scaling in z, and translation in the
x,y,z).
I know I am rendering using perspective mode, so I have near plane, far
plane and horizontal  fov.

I tried to use vtkExternalOpenGL, but nothing is rendered.

Can anyone give me help on how to adjust vtkOpenGLCamera to use these
parameters to render the scene?

Regards
Elhassan
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From rickfrank at me.com  Sun Dec 23 22:17:58 2018
From: rickfrank at me.com (Richard Frank)
Date: Sun, 23 Dec 2018 22:17:58 -0500
Subject: [vtkusers] Hololens support?
Message-ID: <6C31EAB6-2587-423E-8726-AA8021FD449F@me.com>

Hi,

Is there a best practices way to use hololens and VTK?

Thanks

Rick

Sent from my iPad

From elhassan.abdou at gmail.com  Mon Dec 24 04:28:59 2018
From: elhassan.abdou at gmail.com (Elhassan Abdou)
Date: Mon, 24 Dec 2018 10:28:59 +0100
Subject: [vtkusers] vtkCamera parameters
Message-ID: <CAK-92qCpmSALEA8=svqiD-GakoxdLgf9cbA44aATJAm9QOGbvA@mail.gmail.com>

Dear All,

I have a scene that I constructed using OpenGL and I want to rewrite the
code using VTK.
So I have view matrix (compose of, scaling in z, and translation in the
x,y,z).
I know I am rendering using perspective mode, so I have near plane, far
plane and horizontal  fov.

I tried to use vtkExternalOpenGL, but nothing is rendered.

Can anyone give me help on how to adjust vtkOpenGLCamera to use these
parameters to render the scene?

Regards
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From Dzcsu2 at outlook.com  Tue Dec 25 21:19:12 2018
From: Dzcsu2 at outlook.com (CSUMIKE2)
Date: Tue, 25 Dec 2018 19:19:12 -0700 (MST)
Subject: [vtkusers] vtkDistanceWidget
In-Reply-To: <1439833239001-5733532.post@n5.nabble.com>
References: <1439833239001-5733532.post@n5.nabble.com>
Message-ID: <1545790752882-0.post@n5.nabble.com>

Hi, u may want to try this .


	vtkDistanceRepresentation2D *rep2D = vtkDistanceRepresentation2D::New();
	rep2D->GetAxisProperty()->SetColor(1, 0, 0);

	vtkDistanceWidget *distanceWidget = vtkDistanceWidget::New();
	distanceWidget->SetRepresentation(rep2D);



--
Sent from: http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html

From aminemzoughi at febus-optics.com  Wed Dec 26 06:45:11 2018
From: aminemzoughi at febus-optics.com (Mohamed Amine Mzoughi)
Date: Wed, 26 Dec 2018 12:45:11 +0100
Subject: [vtkusers] anti-aliasing
Message-ID: <0a1f4606-9c92-b10b-ee5c-923855a3bb1c@febus-optics.com>

Hello,

I want to enable Anti-alisaing in my VTK app, so I took some parameters 
from ParaView and it still doesn't work :

 ??? m_view->GetRenderer()->UseFXAAOn(); // enable AA

 ??? vtkFXAAOptions* const aaOpts = m_view->GetRenderer()->GetFXAAOptions();
 ??? aaOpts->SetRelativeContrastThreshold(0.125);
 ??? aaOpts->SetHardContrastThreshold(0.045);
 ??? aaOpts->SetSubpixelBlendLimit(0.75);
 ??? aaOpts->SetSubpixelContrastThreshold(0.25);
 ??? aaOpts->SetUseHighQualityEndpoints(true);
 ??? aaOpts->SetEndpointSearchIterations(12);

what am I missing ?

Also, m_view->GetRenderWindow()->GetMultiSamples() => returns 8.

and I called also :

m_view->GetRenderWindow()->LineSmoothingOn();
m_view->GetRenderWindow()->PolygonSmoothingOn(); 
m_view->GetRenderWindow()->PointSmoothingOn();

Thanks.


From paulo.r.m.carvalho at gmail.com  Wed Dec 26 10:55:03 2018
From: paulo.r.m.carvalho at gmail.com (Paulo Carvalho)
Date: Wed, 26 Dec 2018 13:55:03 -0200
Subject: [vtkusers] anti-aliasing
In-Reply-To: <ab61d3d9-7696-ce6b-911d-cd4398f0b7c0@febus-optics.com>
References: <0a1f4606-9c92-b10b-ee5c-923855a3bb1c@febus-optics.com>
 <CA+xrYwiWiSNWkgJpu+21AfamFhfMUyeWNg0iWfYoVgwnQEvcKQ@mail.gmail.com>
 <27fd6479-4647-6588-168f-3d7ab8612684@febus-optics.com>
 <CA+xrYwhp+hU847J4jV+ekUgT_H5oYXnXMFXuxiRNYBmOYc=MjQ@mail.gmail.com>
 <ab61d3d9-7696-ce6b-911d-cd4398f0b7c0@febus-optics.com>
Message-ID: <CA+xrYwi7LckW0R_c6wTto+KLOr8iwY7k_-XwOr3Xi4Usp7U70w@mail.gmail.com>

Hi, Mohammed,

      Yes, I know that feeling...  Paraview is complex, yes.  It's
difficult to get the hang of its code in a glimpse.  Either you invest the
time to dissect the code or look into something simpler.  You may take a
look at how I setup a VTK viewer:
https://github.com/PauloCarvalhoRJ/gammaray/blob/master/viewer3d/view3dwidget.cpp
(It's several orders of magnitude simpler than Paraview).  It's a 3D viewer
in a Qt window though.  I've never tried VTK charts myself (I use the more
lightweight Qwt and Qt Charts APIs for that).

regards,

Paulo

Em qua, 26 de dez de 2018 ?s 13:38, Mohamed Amine Mzoughi <
aminemzoughi at febus-optics.com> escreveu:

> Hello again,
>
> If I do that, the chart is not visible anymore (the Qt widget is all
> black), if I change the renderer of the vtkContextView also  (the Qt widget
> is all white) !
>
> I give up for the moment !
>
> ParaView is a such complex software, that I can't trace the stuff related
> to anti-alisaing in it (reverse engineering ParaView it is tough : a
> complex build system, many layers, proxies, in fact, it's an oriented
> object mix of a lasagna and spaghetti code !).
>
> Thanks anyway.
> Le 26/12/2018 ? 16:02, Paulo Carvalho a ?crit :
>
> Hi, Mohammed,
>
>    Strange indeed.  Did you create the vtkRender object yourself or you
> just used the default one returned by GetRenderer()?   If the latter is
> your case, I recommend creating your own vtkRender:
>
> m_renderer = vtkSmartPointer<vtkRenderer>::New();
> m_renderer->UseFXAAOn();
>
>     vtkFXAAOptions* const aaOpts = m_renderer->GetFXAAOptions();
>      aaOpts->SetRelativeContrastThreshold(0.125);
>      aaOpts->SetHardContrastThreshold(0.045);
>      aaOpts->SetSubpixelBlendLimit(0.75);
>      aaOpts->SetSubpixelContrastThreshold(0.25);
>      aaOpts->SetUseHighQualityEndpoints(true);
>      aaOpts->SetEndpointSearchIterations(12);
>
> m_view->GetRenderWindow()->AddRenderer( m_renderer );
>
> cheers,
>
> Paulo
>
>
> Em qua, 26 de dez de 2018 ?s 12:15, Mohamed Amine Mzoughi <
> aminemzoughi at febus-optics.com> escreveu:
>
>> Hello Paulo,
>>
>> Even without SmoothingOn* instructions, I still have a problem in my 2D
>> charts (I use a subclass of vtkChartXY, same issue with
>> vtkHistogramChart2D, I have rectangles in screen).
>>
>> In ParaView, the line is smooth :
>>
>> whereas in my VTK app, it isn't :
>>
>>
>>
>> I don't know the issue...
>>
>> I'm calling the FXAA instructions before Render() in the constructor, I
>> tried even to call them before each call to Render().
>>
>> Best regards.
>>
>> Le 26/12/2018 ? 14:21, Paulo Carvalho a ?crit :
>>
>> Hello, Mohamed!
>>
>>   It seems that your last calls (*SmoothingOn()) conflict with
>> UseFXAAOn().
>>
>> Here is the output I get when I add a call to PolygonSmoothingOn().  Not
>> only it is not antialiased, but you can notice the edges triangle strips,
>> visually ruining the results:
>>
>> [image: image.png]
>>
>> This one is rendered with only UseFXAAOn() and some configuration to the
>> vtkFXAAOptions object like you did:
>> [image: image.png]
>>
>> kind regards,
>>
>> Paulo
>>
>> Em qua, 26 de dez de 2018 ?s 10:03, Mohamed Amine Mzoughi <
>> aminemzoughi at febus-optics.com> escreveu:
>>
>>> Hello,
>>>
>>> I want to enable Anti-alisaing in my VTK app, so I took some parameters
>>> from ParaView and it still doesn't work :
>>>
>>>      m_view->GetRenderer()->UseFXAAOn(); // enable AA
>>>
>>>      vtkFXAAOptions* const aaOpts =
>>> m_view->GetRenderer()->GetFXAAOptions();
>>>      aaOpts->SetRelativeContrastThreshold(0.125);
>>>      aaOpts->SetHardContrastThreshold(0.045);
>>>      aaOpts->SetSubpixelBlendLimit(0.75);
>>>      aaOpts->SetSubpixelContrastThreshold(0.25);
>>>      aaOpts->SetUseHighQualityEndpoints(true);
>>>      aaOpts->SetEndpointSearchIterations(12);
>>>
>>> what am I missing ?
>>>
>>> Also, m_view->GetRenderWindow()->GetMultiSamples() => returns 8.
>>>
>>> and I called also :
>>>
>>> m_view->GetRenderWindow()->LineSmoothingOn();
>>> m_view->GetRenderWindow()->PolygonSmoothingOn();
>>> m_view->GetRenderWindow()->PointSmoothingOn();
>>>
>>> Thanks.
>>>
>>> _______________________________________________
>>> Powered by www.kitware.com
>>>
>>> Visit other Kitware open-source projects at
>>> http://www.kitware.com/opensource/opensource.html
>>>
>>> Please keep messages on-topic and check the VTK FAQ at:
>>> http://www.vtk.org/Wiki/VTK_FAQ
>>>
>>> Search the list archives at: http://markmail.org/search/?q=vtkusers
>>>
>>> Follow this link to subscribe/unsubscribe:
>>> https://vtk.org/mailman/listinfo/vtkusers
>>>
>>
>>
>
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From aminemzoughi at febus-optics.com  Wed Dec 26 10:38:19 2018
From: aminemzoughi at febus-optics.com (Mohamed Amine Mzoughi)
Date: Wed, 26 Dec 2018 16:38:19 +0100
Subject: [vtkusers] anti-aliasing
In-Reply-To: <CA+xrYwhp+hU847J4jV+ekUgT_H5oYXnXMFXuxiRNYBmOYc=MjQ@mail.gmail.com>
References: <0a1f4606-9c92-b10b-ee5c-923855a3bb1c@febus-optics.com>
 <CA+xrYwiWiSNWkgJpu+21AfamFhfMUyeWNg0iWfYoVgwnQEvcKQ@mail.gmail.com>
 <27fd6479-4647-6588-168f-3d7ab8612684@febus-optics.com>
 <CA+xrYwhp+hU847J4jV+ekUgT_H5oYXnXMFXuxiRNYBmOYc=MjQ@mail.gmail.com>
Message-ID: <ab61d3d9-7696-ce6b-911d-cd4398f0b7c0@febus-optics.com>

Hello again,

If I do that, the chart is not visible anymore (the Qt widget is all 
black), if I change the renderer of the vtkContextView also (the Qt 
widget is all white) !

I give up for the moment !

ParaView is a such complex software, that I can't trace the stuff 
related to anti-alisaing in it (reverse engineering ParaView it is tough 
: a complex build system, many layers, proxies, in fact, it's an 
oriented object mix of a lasagna and spaghetti code !).

Thanks anyway.

Le 26/12/2018 ? 16:02, Paulo Carvalho a ?crit?:
> Hi, Mohammed,
>
> ?? Strange indeed.? Did you create the vtkRender object yourself or 
> you just used the default one returned by GetRenderer()??? If the 
> latter is your case, I recommend creating your own vtkRender:
>
> m_renderer=vtkSmartPointer<vtkRenderer>::New();
> m_renderer->UseFXAAOn();
>
> ??? vtkFXAAOptions* const aaOpts = m_renderer->GetFXAAOptions();
> ???? aaOpts->SetRelativeContrastThreshold(0.125);
> ???? aaOpts->SetHardContrastThreshold(0.045);
> ???? aaOpts->SetSubpixelBlendLimit(0.75);
> ???? aaOpts->SetSubpixelContrastThreshold(0.25);
> ???? aaOpts->SetUseHighQualityEndpoints(true);
> ???? aaOpts->SetEndpointSearchIterations(12);
>
> m_view->GetRenderWindow()->AddRenderer(m_renderer );
>
> cheers,
>
> Paulo
>
>
> Em qua, 26 de dez de 2018 ?s 12:15, Mohamed Amine Mzoughi 
> <aminemzoughi at febus-optics.com <mailto:aminemzoughi at febus-optics.com>> 
> escreveu:
>
>     Hello Paulo,
>
>     Even without SmoothingOn* instructions, I still have a problem in
>     my 2D charts (I use a subclass of vtkChartXY, same issue with
>     vtkHistogramChart2D, I have rectangles in screen).
>
>     In ParaView, the line is smooth :
>
>
>     whereas in my VTK app, it isn't :
>
>
>
>     I don't know the issue...
>
>     I'm calling the FXAA instructions before Render() in the
>     constructor, I tried even to call them before each call to Render().
>
>     Best regards.
>
>     Le 26/12/2018 ? 14:21, Paulo Carvalho a ?crit?:
>>     Hello, Mohamed!
>>
>>     ? It seems that your last calls (*SmoothingOn()) conflict with
>>     UseFXAAOn().
>>
>>     Here is the output I get when I add a call to
>>     PolygonSmoothingOn().? Not only it is not antialiased, but you
>>     can notice the edges triangle strips, visually ruining the results:
>>
>>     image.png
>>
>>     This one is rendered with only UseFXAAOn() and some configuration
>>     to the vtkFXAAOptions object like you did:
>>     image.png
>>
>>     kind regards,
>>
>>     Paulo
>>
>>     Em qua, 26 de dez de 2018 ?s 10:03, Mohamed Amine Mzoughi
>>     <aminemzoughi at febus-optics.com
>>     <mailto:aminemzoughi at febus-optics.com>> escreveu:
>>
>>         Hello,
>>
>>         I want to enable Anti-alisaing in my VTK app, so I took some
>>         parameters
>>         from ParaView and it still doesn't work :
>>
>>         ???? m_view->GetRenderer()->UseFXAAOn(); // enable AA
>>
>>         ???? vtkFXAAOptions* const aaOpts =
>>         m_view->GetRenderer()->GetFXAAOptions();
>>         ???? aaOpts->SetRelativeContrastThreshold(0.125);
>>         ???? aaOpts->SetHardContrastThreshold(0.045);
>>         ???? aaOpts->SetSubpixelBlendLimit(0.75);
>>         ???? aaOpts->SetSubpixelContrastThreshold(0.25);
>>         ???? aaOpts->SetUseHighQualityEndpoints(true);
>>         ???? aaOpts->SetEndpointSearchIterations(12);
>>
>>         what am I missing ?
>>
>>         Also, m_view->GetRenderWindow()->GetMultiSamples() => returns 8.
>>
>>         and I called also :
>>
>>         m_view->GetRenderWindow()->LineSmoothingOn();
>>         m_view->GetRenderWindow()->PolygonSmoothingOn();
>>         m_view->GetRenderWindow()->PointSmoothingOn();
>>
>>         Thanks.
>>
>>         _______________________________________________
>>         Powered by www.kitware.com <http://www.kitware.com>
>>
>>         Visit other Kitware open-source projects at
>>         http://www.kitware.com/opensource/opensource.html
>>
>>         Please keep messages on-topic and check the VTK FAQ at:
>>         http://www.vtk.org/Wiki/VTK_FAQ
>>
>>         Search the list archives at:
>>         http://markmail.org/search/?q=vtkusers
>>
>>         Follow this link to subscribe/unsubscribe:
>>         https://vtk.org/mailman/listinfo/vtkusers
>>
>

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From ricardo.c.r.santos at gmail.com  Wed Dec 26 14:51:06 2018
From: ricardo.c.r.santos at gmail.com (Ricardo Santos)
Date: Wed, 26 Dec 2018 17:51:06 -0200
Subject: [vtkusers] Error compiling OpenGL on Linux
Message-ID: <CAFKnBGSJtKrmRPcgO6cP1cThwOOGtU2XrRhu6SWgt2S_DLZ4Bg@mail.gmail.com>

Hello everyone!

     I am trying to build VTK on linux and I am having a problem that I do
not understand with OpenGL.

On CMake I have left the OpenGL2 option on the variable on
VTK_RENDERING_BACKEND and I receive the error message during make:

(...)
[ 41%] Built target vtkRenderingOpenGL2Java
[ 42%] Built target vtkRenderingOpenGL2JavaJavaClasses
[ 42%] Linking CXX executable ../../bin/vtkProbeOpenGLVersion
Rendering/OpenGL2/CMakeFiles/vtkProbeOpenGLVersion.dir/build.make:108:
recipe for target 'bin/vtkProbeOpenGLVersion' failed
CMakeFiles/Makefile2:7640: recipe for target
'Rendering/OpenGL2/CMakeFiles/vtkProbeOpenGLVersion.dir/all' failed
Makefile:140: recipe for target 'all' failed


      Have anyone gotten a problem like this one?

    Btw, if I set the VTK_RENDERING_BACKEND variable to None, I get the
same error.

Ricardo Santos
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From ricardo.c.r.santos at gmail.com  Wed Dec 26 15:00:02 2018
From: ricardo.c.r.santos at gmail.com (Ricardo Santos)
Date: Wed, 26 Dec 2018 18:00:02 -0200
Subject: [vtkusers] Error compiling OpenGL on Linux
In-Reply-To: <CAFKnBGSJtKrmRPcgO6cP1cThwOOGtU2XrRhu6SWgt2S_DLZ4Bg@mail.gmail.com>
References: <CAFKnBGSJtKrmRPcgO6cP1cThwOOGtU2XrRhu6SWgt2S_DLZ4Bg@mail.gmail.com>
Message-ID: <CAFKnBGRs-SanNsbqMey0i9zE-BayOSKnpuQkZ1cwpn8B_wdcsg@mail.gmail.com>

And, I have GLEW-dev packcage installed on my Linux.

I am Running Ubuntu 18,04, furthermore

On Wed, Dec 26, 2018 at 5:51 PM Ricardo Santos <ricardo.c.r.santos at gmail.com>
wrote:

> Hello everyone!
>
>      I am trying to build VTK on linux and I am having a problem that I do
> not understand with OpenGL.
>
> On CMake I have left the OpenGL2 option on the variable on
> VTK_RENDERING_BACKEND and I receive the error message during make:
>
> (...)
> [ 41%] Built target vtkRenderingOpenGL2Java
> [ 42%] Built target vtkRenderingOpenGL2JavaJavaClasses
> [ 42%] Linking CXX executable ../../bin/vtkProbeOpenGLVersion
> Rendering/OpenGL2/CMakeFiles/vtkProbeOpenGLVersion.dir/build.make:108:
> recipe for target 'bin/vtkProbeOpenGLVersion' failed
> CMakeFiles/Makefile2:7640: recipe for target
> 'Rendering/OpenGL2/CMakeFiles/vtkProbeOpenGLVersion.dir/all' failed
> Makefile:140: recipe for target 'all' failed
>
>
>       Have anyone gotten a problem like this one?
>
>     Btw, if I set the VTK_RENDERING_BACKEND variable to None, I get the
> same error.
>
> Ricardo Santos
>
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From paulo.r.m.carvalho at gmail.com  Wed Dec 26 16:26:05 2018
From: paulo.r.m.carvalho at gmail.com (Paulo Carvalho)
Date: Wed, 26 Dec 2018 19:26:05 -0200
Subject: [vtkusers] Error compiling OpenGL on Linux
In-Reply-To: <CAFKnBGRs-SanNsbqMey0i9zE-BayOSKnpuQkZ1cwpn8B_wdcsg@mail.gmail.com>
References: <CAFKnBGSJtKrmRPcgO6cP1cThwOOGtU2XrRhu6SWgt2S_DLZ4Bg@mail.gmail.com>
 <CAFKnBGRs-SanNsbqMey0i9zE-BayOSKnpuQkZ1cwpn8B_wdcsg@mail.gmail.com>
Message-ID: <CA+xrYwiTgBQskxoYoR7LEW-NHihtYtj=dfiF46rAKzo+t7We0Q@mail.gmail.com>

Hello, Ricardo,

   Common sources of problems with OpenGL (both for linking and runtime)
are old graphics card driver and lack of GLU libraries.  Make sure these
are installed and upgraded to latest version.

cheers,

Paulo

Em qua, 26 de dez de 2018 ?s 18:00, Ricardo Santos <
ricardo.c.r.santos at gmail.com> escreveu:

> And, I have GLEW-dev packcage installed on my Linux.
>
> I am Running Ubuntu 18,04, furthermore
>
> On Wed, Dec 26, 2018 at 5:51 PM Ricardo Santos <
> ricardo.c.r.santos at gmail.com> wrote:
>
>> Hello everyone!
>>
>>      I am trying to build VTK on linux and I am having a problem that I
>> do not understand with OpenGL.
>>
>> On CMake I have left the OpenGL2 option on the variable on
>> VTK_RENDERING_BACKEND and I receive the error message during make:
>>
>> (...)
>> [ 41%] Built target vtkRenderingOpenGL2Java
>> [ 42%] Built target vtkRenderingOpenGL2JavaJavaClasses
>> [ 42%] Linking CXX executable ../../bin/vtkProbeOpenGLVersion
>> Rendering/OpenGL2/CMakeFiles/vtkProbeOpenGLVersion.dir/build.make:108:
>> recipe for target 'bin/vtkProbeOpenGLVersion' failed
>> CMakeFiles/Makefile2:7640: recipe for target
>> 'Rendering/OpenGL2/CMakeFiles/vtkProbeOpenGLVersion.dir/all' failed
>> Makefile:140: recipe for target 'all' failed
>>
>>
>>       Have anyone gotten a problem like this one?
>>
>>     Btw, if I set the VTK_RENDERING_BACKEND variable to None, I get the
>> same error.
>>
>> Ricardo Santos
>>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
> http://www.vtk.org/Wiki/VTK_FAQ
>
> Search the list archives at: http://markmail.org/search/?q=vtkusers
>
> Follow this link to subscribe/unsubscribe:
> https://vtk.org/mailman/listinfo/vtkusers
>
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From zozonmr at gmail.com  Wed Dec 26 17:10:31 2018
From: zozonmr at gmail.com (Zoltan Takacs)
Date: Wed, 26 Dec 2018 23:10:31 +0100
Subject: [vtkusers] Using Vtk-8.1 in tcl/tk
Message-ID: <CD00A958-E547-4600-8BE6-A24E7ACD6275@gmail.com>

Hi,

I have finally compiled VTK-8.1 on MacOS High Sierra and I could run couple of the Qt and c++ examples successfully. However I would like to use it tcl scripts as well. As far as I understood the *TCL shared libraries are not built any more from version 8.1. Is it still possible to use VTK in tcl programs? I have added the build/Wrapping/Tcl library to the auto_path and when I run one of the tcl examples I get an error message about the missing *TCL shared library. Here is the full error message:

dlopen(/Users/me/data/VTK-8.1.2/build/lib/libvtkCommonCoreTCL-8.1.dylib, 6): image not found
attempt to provide package vtkCommonCoreTCL 8.1 failed: no version of package vtkCommonCoreTCL provided
attempt to provide package vtkcommoncore 8.1 failed: no version of package vtkcommoncore provided
attempt to provide package vtk 8.1 failed: no version of package vtk provided
    ("package ifneeded vtk 8.1" script)
    invoked from within
"package require vtk"
    (file "./AffineWidget.tcl" line 4)


The error message is fair enough since there is no libvtkCommonCoreTCL-8.1.dylib ccmake didn?t allow me to create them. 

Thanks,
Z 

From afajjay.hicham at gmail.com  Thu Dec 27 06:48:40 2018
From: afajjay.hicham at gmail.com (Afajjay Hicham)
Date: Thu, 27 Dec 2018 12:48:40 +0100
Subject: [vtkusers] ERROR in VTK
Message-ID: <CAOZXYo65sq9yhjFvzZYZ5oPDTBNuhG_exxi03qE1bL=ihQuXUg@mail.gmail.com>

Hello

I installed VTK VTK-8.1.2 but when I use it in a first project
"SimplePointsReader"  the image works but I get a new window calls
"vtkOutputwindow" print this Error :
ERROR: In C:\VTK\VTK-8.1.2\Rendering\OpenGL2\vtkWin32OpenGLRenderWindow.cxx,
line 733
vtkWin32OpenGLRenderWindow (000001D3C76A29B0): We have determined that your
graphics system is an Intel SandyBridge based system. These systems only
partially  support VTK. If you encounter any issues please make sure your
graphics drivers from Intel are up to date.
So what can i do?

thank you

-- 

*AFAJJAY Hicham*
*Ing?nieur IT*
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From lasso at queensu.ca  Thu Dec 27 16:45:56 2018
From: lasso at queensu.ca (Andras Lasso)
Date: Thu, 27 Dec 2018 21:45:56 +0000
Subject: [vtkusers] anti-aliasing
In-Reply-To: <ab61d3d9-7696-ce6b-911d-cd4398f0b7c0@febus-optics.com>
References: <0a1f4606-9c92-b10b-ee5c-923855a3bb1c@febus-optics.com>
 <CA+xrYwiWiSNWkgJpu+21AfamFhfMUyeWNg0iWfYoVgwnQEvcKQ@mail.gmail.com>
 <27fd6479-4647-6588-168f-3d7ab8612684@febus-optics.com>
 <CA+xrYwhp+hU847J4jV+ekUgT_H5oYXnXMFXuxiRNYBmOYc=MjQ@mail.gmail.com>
 <ab61d3d9-7696-ce6b-911d-cd4398f0b7c0@febus-optics.com>
Message-ID: <YTOPR0101MB129273C5A14D2C35D1F80CEFD8B60@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>

To activate anti-aliasing, you can enable FXAA in the renderer using renderer.UseFXAAOn() or set number of samples in the render window using renderWindow.setMultiSamples(8) (if you render in a Qt widget, adjust samples property in the window?s surface format - http://doc.qt.io/qt-5/qsurfaceformat.html#setSamples). Anti-aliasing has impact on performance and may not be compatible with some rendering options.

Andras

From: vtkusers <vtkusers-bounces at vtk.org> On Behalf Of Mohamed Amine Mzoughi
Sent: Wednesday, December 26, 2018 10:38 AM
To: Paulo Carvalho <paulo.r.m.carvalho at gmail.com>; vtkusers at public.kitware.com
Subject: Re: [vtkusers] anti-aliasing


Hello again,

If I do that, the chart is not visible anymore (the Qt widget is all black), if I change the renderer of the vtkContextView also  (the Qt widget is all white) !

I give up for the moment !

ParaView is a such complex software, that I can't trace the stuff related to anti-alisaing in it (reverse engineering ParaView it is tough : a complex build system, many layers, proxies, in fact, it's an oriented object mix of a lasagna and spaghetti code !).

Thanks anyway.
Le 26/12/2018 ? 16:02, Paulo Carvalho a ?crit :
Hi, Mohammed,
   Strange indeed.  Did you create the vtkRender object yourself or you just used the default one returned by GetRenderer()?   If the latter is your case, I recommend creating your own vtkRender:

m_renderer = vtkSmartPointer<vtkRenderer>::New();
m_renderer->UseFXAAOn();

    vtkFXAAOptions* const aaOpts = m_renderer->GetFXAAOptions();
     aaOpts->SetRelativeContrastThreshold(0.125);
     aaOpts->SetHardContrastThreshold(0.045);
     aaOpts->SetSubpixelBlendLimit(0.75);
     aaOpts->SetSubpixelContrastThreshold(0.25);
     aaOpts->SetUseHighQualityEndpoints(true);
     aaOpts->SetEndpointSearchIterations(12);

m_view->GetRenderWindow()->AddRenderer( m_renderer );

cheers,
Paulo


Em qua, 26 de dez de 2018 ?s 12:15, Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com<mailto:aminemzoughi at febus-optics.com>> escreveu:

Hello Paulo,

Even without SmoothingOn* instructions, I still have a problem in my 2D charts (I use a subclass of vtkChartXY, same issue with vtkHistogramChart2D, I have rectangles in screen).

In ParaView, the line is smooth :
[cid:image001.png at 01D49DF9.6FAAD070]
whereas in my VTK app, it isn't :

[cid:image002.png at 01D49DF9.6FAAD070]

I don't know the issue...

I'm calling the FXAA instructions before Render() in the constructor, I tried even to call them before each call to Render().

Best regards.
Le 26/12/2018 ? 14:21, Paulo Carvalho a ?crit :
Hello, Mohamed!
  It seems that your last calls (*SmoothingOn()) conflict with UseFXAAOn().
Here is the output I get when I add a call to PolygonSmoothingOn().  Not only it is not antialiased, but you can notice the edges triangle strips, visually ruining the results:
[image.png]
This one is rendered with only UseFXAAOn() and some configuration to the vtkFXAAOptions object like you did:
[image.png]
kind regards,
Paulo

Em qua, 26 de dez de 2018 ?s 10:03, Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com<mailto:aminemzoughi at febus-optics.com>> escreveu:
Hello,

I want to enable Anti-alisaing in my VTK app, so I took some parameters
from ParaView and it still doesn't work :

     m_view->GetRenderer()->UseFXAAOn(); // enable AA

     vtkFXAAOptions* const aaOpts = m_view->GetRenderer()->GetFXAAOptions();
     aaOpts->SetRelativeContrastThreshold(0.125);
     aaOpts->SetHardContrastThreshold(0.045);
     aaOpts->SetSubpixelBlendLimit(0.75);
     aaOpts->SetSubpixelContrastThreshold(0.25);
     aaOpts->SetUseHighQualityEndpoints(true);
     aaOpts->SetEndpointSearchIterations(12);

what am I missing ?

Also, m_view->GetRenderWindow()->GetMultiSamples() => returns 8.

and I called also :

m_view->GetRenderWindow()->LineSmoothingOn();
m_view->GetRenderWindow()->PolygonSmoothingOn();
m_view->GetRenderWindow()->PointSmoothingOn();

Thanks.

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From lasso at queensu.ca  Fri Dec 28 12:52:21 2018
From: lasso at queensu.ca (Andras Lasso)
Date: Fri, 28 Dec 2018 17:52:21 +0000
Subject: [vtkusers] anti-aliasing
In-Reply-To: <a236dd31-b577-74b8-9058-7d5ab657f914@febus-optics.com>
References: <0a1f4606-9c92-b10b-ee5c-923855a3bb1c@febus-optics.com>
 <CA+xrYwiWiSNWkgJpu+21AfamFhfMUyeWNg0iWfYoVgwnQEvcKQ@mail.gmail.com>
 <27fd6479-4647-6588-168f-3d7ab8612684@febus-optics.com>
 <CA+xrYwhp+hU847J4jV+ekUgT_H5oYXnXMFXuxiRNYBmOYc=MjQ@mail.gmail.com>
 <ab61d3d9-7696-ce6b-911d-cd4398f0b7c0@febus-optics.com>
 <YTOPR0101MB129273C5A14D2C35D1F80CEFD8B60@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>
 <a236dd31-b577-74b8-9058-7d5ab657f914@febus-optics.com>
Message-ID: <YTOPR0101MB1292F5BAD414607C1FA42F10D8B70@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>

Multi-sampling works well for me (it smoothes lines, etc.) except axes areas appear black. This is probably a VTK bug that should be fixed, but maybe I just have not configured everything correctly.

ParaView uses multi-sampling for anti-aliasing in plots and not FXAA (https://github.com/Kitware/ParaView/blob/master/Qt/Core/pqContextView.cxx#L143, https://gitlab.kitware.com/paraview/paraview/issues/17202). Anti-aliasing in plots works well in Paraview 5.5.2 (smooth lines, properly rendered axes). There is no antialiasing in plots in ParaView 5.6.0 (lines are jagged), so there may be some multi-sampling related issues in recent VTK version.

Andras

From: Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com>
Sent: Friday, December 28, 2018 10:01 AM
To: Andras Lasso <lasso at queensu.ca>; Paulo Carvalho <paulo.r.m.carvalho at gmail.com>; vtkusers at public.kitware.com
Subject: Re: [vtkusers] anti-aliasing


As you can see in the screenshots below, I was unable to smooth vtkChartXY's plot line (displayed on a QVTKOpenGLWidget) plot with UseFXAAOn and setMultiSamples(8) (multi samples is defaulted to 8 anyway).

Changing the surface format's samples number messed badly the 2D charts with black areas. This is what I've done in constructor :

QSurfaceFormat surface = m_widget->format();
std::cout << "[debug] Qt widget samples = " << surface.samples() << std::endl; // 0 by default (disabled)
surface.setSamples(8);
m_widget->setFormat(surface);

Regards.
Le 27/12/2018 ? 22:45, Andras Lasso a ?crit :
To activate anti-aliasing, you can enable FXAA in the renderer using renderer.UseFXAAOn() or set number of samples in the render window using renderWindow.setMultiSamples(8) (if you render in a Qt widget, adjust samples property in the window?s surface format - http://doc.qt.io/qt-5/qsurfaceformat.html#setSamples<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdoc.qt.io%2Fqt-5%2Fqsurfaceformat.html%23setSamples&data=02%7C01%7Classo%40queensu.ca%7C753aca6286994b17a15d08d66cd53b4f%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636816060432571103&sdata=kKNCZ2h%2FT81oqw77gwhW4lT%2BcLqeLtxOlvFuHOciieY%3D&reserved=0>). Anti-aliasing has impact on performance and may not be compatible with some rendering options.

Andras

From: vtkusers <vtkusers-bounces at vtk.org><mailto:vtkusers-bounces at vtk.org> On Behalf Of Mohamed Amine Mzoughi
Sent: Wednesday, December 26, 2018 10:38 AM
To: Paulo Carvalho <paulo.r.m.carvalho at gmail.com><mailto:paulo.r.m.carvalho at gmail.com>; vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>
Subject: Re: [vtkusers] anti-aliasing


Hello again,

If I do that, the chart is not visible anymore (the Qt widget is all black), if I change the renderer of the vtkContextView also  (the Qt widget is all white) !

I give up for the moment !

ParaView is a such complex software, that I can't trace the stuff related to anti-alisaing in it (reverse engineering ParaView it is tough : a complex build system, many layers, proxies, in fact, it's an oriented object mix of a lasagna and spaghetti code !).

Thanks anyway.
Le 26/12/2018 ? 16:02, Paulo Carvalho a ?crit :
Hi, Mohammed,
   Strange indeed.  Did you create the vtkRender object yourself or you just used the default one returned by GetRenderer()?   If the latter is your case, I recommend creating your own vtkRender:

m_renderer = vtkSmartPointer<vtkRenderer>::New();
m_renderer->UseFXAAOn();

    vtkFXAAOptions* const aaOpts = m_renderer->GetFXAAOptions();
     aaOpts->SetRelativeContrastThreshold(0.125);
     aaOpts->SetHardContrastThreshold(0.045);
     aaOpts->SetSubpixelBlendLimit(0.75);
     aaOpts->SetSubpixelContrastThreshold(0.25);
     aaOpts->SetUseHighQualityEndpoints(true);
     aaOpts->SetEndpointSearchIterations(12);

m_view->GetRenderWindow()->AddRenderer( m_renderer );

cheers,
Paulo


Em qua, 26 de dez de 2018 ?s 12:15, Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com<mailto:aminemzoughi at febus-optics.com>> escreveu:

Hello Paulo,

Even without SmoothingOn* instructions, I still have a problem in my 2D charts (I use a subclass of vtkChartXY, same issue with vtkHistogramChart2D, I have rectangles in screen).

In ParaView, the line is smooth :
[cid:image001.png at 01D49E98.9BBE8900]
whereas in my VTK app, it isn't :

[cid:image002.png at 01D49E98.9BBE8900]

I don't know the issue...

I'm calling the FXAA instructions before Render() in the constructor, I tried even to call them before each call to Render().

Best regards.
Le 26/12/2018 ? 14:21, Paulo Carvalho a ?crit :
Hello, Mohamed!
  It seems that your last calls (*SmoothingOn()) conflict with UseFXAAOn().
Here is the output I get when I add a call to PolygonSmoothingOn().  Not only it is not antialiased, but you can notice the edges triangle strips, visually ruining the results:
[image.png]
This one is rendered with only UseFXAAOn() and some configuration to the vtkFXAAOptions object like you did:
[image.png]
kind regards,
Paulo

Em qua, 26 de dez de 2018 ?s 10:03, Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com<mailto:aminemzoughi at febus-optics.com>> escreveu:
Hello,

I want to enable Anti-alisaing in my VTK app, so I took some parameters
from ParaView and it still doesn't work :

     m_view->GetRenderer()->UseFXAAOn(); // enable AA

     vtkFXAAOptions* const aaOpts = m_view->GetRenderer()->GetFXAAOptions();
     aaOpts->SetRelativeContrastThreshold(0.125);
     aaOpts->SetHardContrastThreshold(0.045);
     aaOpts->SetSubpixelBlendLimit(0.75);
     aaOpts->SetSubpixelContrastThreshold(0.25);
     aaOpts->SetUseHighQualityEndpoints(true);
     aaOpts->SetEndpointSearchIterations(12);

what am I missing ?

Also, m_view->GetRenderWindow()->GetMultiSamples() => returns 8.

and I called also :

m_view->GetRenderWindow()->LineSmoothingOn();
m_view->GetRenderWindow()->PolygonSmoothingOn();
m_view->GetRenderWindow()->PointSmoothingOn();

Thanks.

_______________________________________________
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From lasso at queensu.ca  Fri Dec 28 13:03:38 2018
From: lasso at queensu.ca (Andras Lasso)
Date: Fri, 28 Dec 2018 18:03:38 +0000
Subject: [vtkusers] anti-aliasing
In-Reply-To: <YTOPR0101MB1292F5BAD414607C1FA42F10D8B70@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>
References: <0a1f4606-9c92-b10b-ee5c-923855a3bb1c@febus-optics.com>
 <CA+xrYwiWiSNWkgJpu+21AfamFhfMUyeWNg0iWfYoVgwnQEvcKQ@mail.gmail.com>
 <27fd6479-4647-6588-168f-3d7ab8612684@febus-optics.com>
 <CA+xrYwhp+hU847J4jV+ekUgT_H5oYXnXMFXuxiRNYBmOYc=MjQ@mail.gmail.com>
 <ab61d3d9-7696-ce6b-911d-cd4398f0b7c0@febus-optics.com>
 <YTOPR0101MB129273C5A14D2C35D1F80CEFD8B60@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>
 <a236dd31-b577-74b8-9058-7d5ab657f914@febus-optics.com>
 <YTOPR0101MB1292F5BAD414607C1FA42F10D8B70@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>
Message-ID: <YTOPR0101MB129219E60CF60258E927F6E0D8B70@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>

Plot axes are not painted correctly when multi-sampling is enabled due to an OpenGL error in vtkTextureObject::CopyFromFrameBuffer, which seems to be related to copying data from the frame buffer.

[ERROR][VTK] 28.12.2018 12:51:01 [vtkTextureObject (0000026457878B60)] (C:\D\S4D\VTK\Rendering\OpenGL2\vtkTextureObject.cxx:1990) - failed at glCopyTexImage2D 32856 1 OpenGL errors detected
0 : (1282) Invalid operation

Andras


From: Andras Lasso
Sent: Friday, December 28, 2018 12:52 PM
To: 'Mohamed Amine Mzoughi' <aminemzoughi at febus-optics.com>; Paulo Carvalho <paulo.r.m.carvalho at gmail.com>; vtkusers at public.kitware.com
Subject: RE: [vtkusers] anti-aliasing

Multi-sampling works well for me (it smoothes lines, etc.) except axes areas appear black. This is probably a VTK bug that should be fixed, but maybe I just have not configured everything correctly.

ParaView uses multi-sampling for anti-aliasing in plots and not FXAA (https://github.com/Kitware/ParaView/blob/master/Qt/Core/pqContextView.cxx#L143, https://gitlab.kitware.com/paraview/paraview/issues/17202). Anti-aliasing in plots works well in Paraview 5.5.2 (smooth lines, properly rendered axes). There is no antialiasing in plots in ParaView 5.6.0 (lines are jagged), so there may be some multi-sampling related issues in recent VTK version.

Andras

From: Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com<mailto:aminemzoughi at febus-optics.com>>
Sent: Friday, December 28, 2018 10:01 AM
To: Andras Lasso <lasso at queensu.ca<mailto:lasso at queensu.ca>>; Paulo Carvalho <paulo.r.m.carvalho at gmail.com<mailto:paulo.r.m.carvalho at gmail.com>>; vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>
Subject: Re: [vtkusers] anti-aliasing


As you can see in the screenshots below, I was unable to smooth vtkChartXY's plot line (displayed on a QVTKOpenGLWidget) plot with UseFXAAOn and setMultiSamples(8) (multi samples is defaulted to 8 anyway).

Changing the surface format's samples number messed badly the 2D charts with black areas. This is what I've done in constructor :

QSurfaceFormat surface = m_widget->format();
std::cout << "[debug] Qt widget samples = " << surface.samples() << std::endl; // 0 by default (disabled)
surface.setSamples(8);
m_widget->setFormat(surface);

Regards.
Le 27/12/2018 ? 22:45, Andras Lasso a ?crit :
To activate anti-aliasing, you can enable FXAA in the renderer using renderer.UseFXAAOn() or set number of samples in the render window using renderWindow.setMultiSamples(8) (if you render in a Qt widget, adjust samples property in the window?s surface format - http://doc.qt.io/qt-5/qsurfaceformat.html#setSamples<https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdoc.qt.io%2Fqt-5%2Fqsurfaceformat.html%23setSamples&data=02%7C01%7Classo%40queensu.ca%7C753aca6286994b17a15d08d66cd53b4f%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636816060432571103&sdata=kKNCZ2h%2FT81oqw77gwhW4lT%2BcLqeLtxOlvFuHOciieY%3D&reserved=0>). Anti-aliasing has impact on performance and may not be compatible with some rendering options.

Andras

From: vtkusers <vtkusers-bounces at vtk.org><mailto:vtkusers-bounces at vtk.org> On Behalf Of Mohamed Amine Mzoughi
Sent: Wednesday, December 26, 2018 10:38 AM
To: Paulo Carvalho <paulo.r.m.carvalho at gmail.com><mailto:paulo.r.m.carvalho at gmail.com>; vtkusers at public.kitware.com<mailto:vtkusers at public.kitware.com>
Subject: Re: [vtkusers] anti-aliasing


Hello again,

If I do that, the chart is not visible anymore (the Qt widget is all black), if I change the renderer of the vtkContextView also  (the Qt widget is all white) !

I give up for the moment !

ParaView is a such complex software, that I can't trace the stuff related to anti-alisaing in it (reverse engineering ParaView it is tough : a complex build system, many layers, proxies, in fact, it's an oriented object mix of a lasagna and spaghetti code !).

Thanks anyway.
Le 26/12/2018 ? 16:02, Paulo Carvalho a ?crit :
Hi, Mohammed,
   Strange indeed.  Did you create the vtkRender object yourself or you just used the default one returned by GetRenderer()?   If the latter is your case, I recommend creating your own vtkRender:

m_renderer = vtkSmartPointer<vtkRenderer>::New();
m_renderer->UseFXAAOn();

    vtkFXAAOptions* const aaOpts = m_renderer->GetFXAAOptions();
     aaOpts->SetRelativeContrastThreshold(0.125);
     aaOpts->SetHardContrastThreshold(0.045);
     aaOpts->SetSubpixelBlendLimit(0.75);
     aaOpts->SetSubpixelContrastThreshold(0.25);
     aaOpts->SetUseHighQualityEndpoints(true);
     aaOpts->SetEndpointSearchIterations(12);

m_view->GetRenderWindow()->AddRenderer( m_renderer );

cheers,
Paulo


Em qua, 26 de dez de 2018 ?s 12:15, Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com<mailto:aminemzoughi at febus-optics.com>> escreveu:

Hello Paulo,

Even without SmoothingOn* instructions, I still have a problem in my 2D charts (I use a subclass of vtkChartXY, same issue with vtkHistogramChart2D, I have rectangles in screen).

In ParaView, the line is smooth :
[cid:image001.png at 01D49EAD.6AE04340]
whereas in my VTK app, it isn't :

[cid:image002.png at 01D49EAD.6AE04340]

I don't know the issue...

I'm calling the FXAA instructions before Render() in the constructor, I tried even to call them before each call to Render().

Best regards.
Le 26/12/2018 ? 14:21, Paulo Carvalho a ?crit :
Hello, Mohamed!
  It seems that your last calls (*SmoothingOn()) conflict with UseFXAAOn().
Here is the output I get when I add a call to PolygonSmoothingOn().  Not only it is not antialiased, but you can notice the edges triangle strips, visually ruining the results:
[image.png]
This one is rendered with only UseFXAAOn() and some configuration to the vtkFXAAOptions object like you did:
[image.png]
kind regards,
Paulo

Em qua, 26 de dez de 2018 ?s 10:03, Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com<mailto:aminemzoughi at febus-optics.com>> escreveu:
Hello,

I want to enable Anti-alisaing in my VTK app, so I took some parameters
from ParaView and it still doesn't work :

     m_view->GetRenderer()->UseFXAAOn(); // enable AA

     vtkFXAAOptions* const aaOpts = m_view->GetRenderer()->GetFXAAOptions();
     aaOpts->SetRelativeContrastThreshold(0.125);
     aaOpts->SetHardContrastThreshold(0.045);
     aaOpts->SetSubpixelBlendLimit(0.75);
     aaOpts->SetSubpixelContrastThreshold(0.25);
     aaOpts->SetUseHighQualityEndpoints(true);
     aaOpts->SetEndpointSearchIterations(12);

what am I missing ?

Also, m_view->GetRenderWindow()->GetMultiSamples() => returns 8.

and I called also :

m_view->GetRenderWindow()->LineSmoothingOn();
m_view->GetRenderWindow()->PolygonSmoothingOn();
m_view->GetRenderWindow()->PointSmoothingOn();

Thanks.

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From aminemzoughi at febus-optics.com  Fri Dec 28 10:00:35 2018
From: aminemzoughi at febus-optics.com (Mohamed Amine Mzoughi)
Date: Fri, 28 Dec 2018 16:00:35 +0100
Subject: [vtkusers] anti-aliasing
In-Reply-To: <YTOPR0101MB129273C5A14D2C35D1F80CEFD8B60@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>
References: <0a1f4606-9c92-b10b-ee5c-923855a3bb1c@febus-optics.com>
 <CA+xrYwiWiSNWkgJpu+21AfamFhfMUyeWNg0iWfYoVgwnQEvcKQ@mail.gmail.com>
 <27fd6479-4647-6588-168f-3d7ab8612684@febus-optics.com>
 <CA+xrYwhp+hU847J4jV+ekUgT_H5oYXnXMFXuxiRNYBmOYc=MjQ@mail.gmail.com>
 <ab61d3d9-7696-ce6b-911d-cd4398f0b7c0@febus-optics.com>
 <YTOPR0101MB129273C5A14D2C35D1F80CEFD8B60@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>
Message-ID: <a236dd31-b577-74b8-9058-7d5ab657f914@febus-optics.com>

As you can see in the screenshots below, I was unable to smooth 
vtkChartXY's plot line (displayed on a QVTKOpenGLWidget) plot with 
UseFXAAOn and setMultiSamples(8) (multi samples is defaulted to 8 anyway).

Changing the surface format's samples number messed badly the 2D charts 
with black areas. This is what I've done in constructor :

QSurfaceFormat surface = m_widget->format();
std::cout << "[debug] Qt widget samples = " << surface.samples() << 
std::endl; // 0 by default (disabled)
surface.setSamples(8);
m_widget->setFormat(surface);

Regards.

Le 27/12/2018 ? 22:45, Andras Lasso a ?crit?:
>
> To activate anti-aliasing, you can enable FXAA in the renderer using 
> renderer.UseFXAAOn() or set number of samples in the render window 
> using renderWindow.setMultiSamples(8) (if you render in a Qt widget, 
> adjust samples property in the window?s surface format - 
> http://doc.qt.io/qt-5/qsurfaceformat.html#setSamples). Anti-aliasing 
> has impact on performance and may not be compatible with some 
> rendering options.
>
> Andras
>
> *From:* vtkusers <vtkusers-bounces at vtk.org> *On Behalf Of *Mohamed 
> Amine Mzoughi
> *Sent:* Wednesday, December 26, 2018 10:38 AM
> *To:* Paulo Carvalho <paulo.r.m.carvalho at gmail.com>; 
> vtkusers at public.kitware.com
> *Subject:* Re: [vtkusers] anti-aliasing
>
> Hello again,
>
> If I do that, the chart is not visible anymore (the Qt widget is all 
> black), if I change the renderer of the vtkContextView also? (the Qt 
> widget is all white) !
>
> I give up for the moment !
>
> ParaView is a such complex software, that I can't trace the stuff 
> related to anti-alisaing in it (reverse engineering ParaView it is 
> tough : a complex build system, many layers, proxies, in fact, it's an 
> oriented object mix of a lasagna and spaghetti code !).
>
> Thanks anyway.
>
> Le 26/12/2018 ? 16:02, Paulo Carvalho a ?crit?:
>
>     Hi, Mohammed,
>
>     ?? Strange indeed.? Did you create the vtkRender object yourself
>     or you just used the default one returned by GetRenderer()? If the
>     latter is your case, I recommend creating your own vtkRender:
>
>
>     m_renderer=vtkSmartPointer<vtkRenderer>::New();
>     m_renderer->/UseFXAAOn/();
>
>     ??? vtkFXAAOptions* const aaOpts = m_renderer->GetFXAAOptions();
>     aaOpts->SetRelativeContrastThreshold(0.125);
>     ???? aaOpts->SetHardContrastThreshold(0.045);
>     ???? aaOpts->SetSubpixelBlendLimit(0.75);
>     aaOpts->SetSubpixelContrastThreshold(0.25);
>     ???? aaOpts->SetUseHighQualityEndpoints(true);
>     ???? aaOpts->SetEndpointSearchIterations(12);
>
>     m_view->/GetRenderWindow/()->/AddRenderer/(m_renderer );
>
>     cheers,
>
>     Paulo
>
>     Em qua, 26 de dez de 2018 ?s 12:15, Mohamed Amine Mzoughi
>     <aminemzoughi at febus-optics.com
>     <mailto:aminemzoughi at febus-optics.com>> escreveu:
>
>         Hello Paulo,
>
>         Even without SmoothingOn* instructions, I still have a problem
>         in my 2D charts (I use a subclass of vtkChartXY, same issue
>         with vtkHistogramChart2D, I have rectangles in screen).
>
>         In ParaView, the line is smooth :
>
>
>         whereas in my VTK app, it isn't :
>
>
>
>         I don't know the issue...
>
>         I'm calling the FXAA instructions before Render() in the
>         constructor, I tried even to call them before each call to
>         Render().
>
>         Best regards.
>
>         Le 26/12/2018 ? 14:21, Paulo Carvalho a ?crit?:
>
>             Hello, Mohamed!
>
>             ? It seems that your last calls (*SmoothingOn()) conflict
>             with UseFXAAOn().
>
>             Here is the output I get when I add a call to
>             PolygonSmoothingOn().? Not only it is not antialiased, but
>             you can notice the edges triangle strips, visually ruining
>             the results:
>
>             image.png
>
>             This one is rendered with only UseFXAAOn() and some
>             configuration to the vtkFXAAOptions object like you did:
>
>             image.png
>
>             kind regards,
>
>             Paulo
>
>             Em qua, 26 de dez de 2018 ?s 10:03, Mohamed Amine Mzoughi
>             <aminemzoughi at febus-optics.com
>             <mailto:aminemzoughi at febus-optics.com>> escreveu:
>
>                 Hello,
>
>                 I want to enable Anti-alisaing in my VTK app, so I
>                 took some parameters
>                 from ParaView and it still doesn't work :
>
>                 ???? m_view->GetRenderer()->UseFXAAOn(); // enable AA
>
>                 ???? vtkFXAAOptions* const aaOpts =
>                 m_view->GetRenderer()->GetFXAAOptions();
>                 aaOpts->SetRelativeContrastThreshold(0.125);
>                 ???? aaOpts->SetHardContrastThreshold(0.045);
>                 ???? aaOpts->SetSubpixelBlendLimit(0.75);
>                 aaOpts->SetSubpixelContrastThreshold(0.25);
>                 aaOpts->SetUseHighQualityEndpoints(true);
>                 ???? aaOpts->SetEndpointSearchIterations(12);
>
>                 what am I missing ?
>
>                 Also, m_view->GetRenderWindow()->GetMultiSamples() =>
>                 returns 8.
>
>                 and I called also :
>
>                 m_view->GetRenderWindow()->LineSmoothingOn();
>                 m_view->GetRenderWindow()->PolygonSmoothingOn();
>                 m_view->GetRenderWindow()->PointSmoothingOn();
>
>                 Thanks.
>
>                 _______________________________________________
>                 Powered by www.kitware.com
>                 <https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.kitware.com&data=02%7C01%7Classo%40queensu.ca%7Cd59b33f462b04822b2bb08d66b4ac286%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C1%7C636814366213770685&sdata=sS8BA%2FZ5H9Si5V4c90R1XjwY9sT0itroRaXSfGnnBx4%3D&reserved=0>
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From dan.lipsa at kitware.com  Sat Dec 29 11:21:33 2018
From: dan.lipsa at kitware.com (Dan Lipsa)
Date: Sat, 29 Dec 2018 11:21:33 -0500
Subject: [vtkusers] construct from vtkCamera from opengl Variables
In-Reply-To: <CAK-92qB4X7XTH91BccgF1vV1J61hYb--ipSm5bRLepnUrn7M5g@mail.gmail.com>
References: <CAK-92qB4X7XTH91BccgF1vV1J61hYb--ipSm5bRLepnUrn7M5g@mail.gmail.com>
Message-ID: <CADwGrVooOsedUZx7YZR_s+vrARGytiEY60w8am2wL7xM838apA@mail.gmail.com>

If you have a scene that you want to render in VTK, the easiest would be to
build a vtkDataset (vtkPolyData most likely) and then
render that in VTK. You don't need to worry about the OpenGL transform or
interaction as VTK does this for you.

Take a look at
https://lorensen.github.io/VTKExamples/site/
Cxx / GeometricObjects
for examples of how to do this.

Dan




On Sat, Dec 22, 2018 at 6:01 PM Elhassan Abdou <elhassan.abdou at gmail.com>
wrote:

> Dear All,
>
> I have a scene that I constructed using OpenGL and I want to rewrite the
> code using VTK.
> So I have view matrix (compose of, scaling in z, and translation in the
> x,y,z).
> I know I am rendering using perspective mode, so I have near plane, far
> plane and horizontal  fov.
>
> I tried to use vtkExternalOpenGL, but nothing is rendered.
>
> Can anyone give me help on how to adjust vtkOpenGLCamera to use these
> parameters to render the scene?
>
> Regards
> Elhassan
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the VTK FAQ at:
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>
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From t.stuart at dautomation.com  Sun Dec 30 09:38:27 2018
From: t.stuart at dautomation.com (Stuart, Travis)
Date: Sun, 30 Dec 2018 14:38:27 +0000
Subject: [vtkusers] Scaling Glyphs by Camera but to a Limit
Message-ID: <9BD404E7D759A24FB34ACE0E4C9F162BB1E137@es002.dautomation.local>

Hi,
I'm having trouble achieving a particular rendering behavior with VTK. I would like to render glyphs of my point cloud with a fixed screen size up until the camera is zoomed in close enough for the glyph to be its actual size. I want them to be scaled up but not down.

I can fake this behavior by rendering two sets on top of each other. One set not scaled and the other scaled by distance to camera. But this is not ideal for huge data sets and I'd like to learn the correct way to solve this with one set.

At first I thought the scale clamping functionality of the vtkGlyph3DMapper could do this but setting the range to clamp seems to just scale the 'DistanceToCamera' values to the range.

One idea I had was to create a programmable filter that takes the vtkDistanceToCamera as input and outputs the same object but with an additional array. The same 'DistanceToCamera' array but with capped values below a certain threshold. Like any value under 1 would be set to 1.

This is my failed attempt: It causes Python to immediately crash without error message.

cap_array_filter = vtk.vtkProgrammableFilter()
cap_array_filter.SetInputConnection(camera_dist_b.GetOutputPort())

def cap_array():
    d2c_array = cap_array_filter.GetPolyDataInput().GetPointData().GetArray('DistanceToCamera')

    new_array = vtk.vtkDoubleArray()
    new_array.SetName('DistanceToCameraCapped')

    for i in range(0, d2c_array.GetSize()):
        new_value = d2c_array.GetTuple1(i)
        if new_value < 1:
            new_value = 1

        new_array.InsertNextValue(new_value)

    cap_array_filter.GetPointData().AddArray(new_array)


cap_array_filter.SetExecuteMethod(cap_array)
camera_dist_b.SetInputConnection(cap_array_filter.GetOutputPort())

mapper_b = vtk.vtkGlyph3DMapper()
mapper_b.SetInputData(self.nominal_poly_data)
mapper_b.SetSourceConnection(sphere.GetOutputPort())

mapper_b.SetInputConnection(camera_dist_b.GetOutputPort())
mapper_b.SetInputArrayToProcess(0, 0, 0, vtk.vtkDataObject.FIELD_ASSOCIATION_POINTS, 'DistanceToCameraCapped')


I also tried creating a VTKPythonAlgorithm to pass in a vtkDistanceToCamera and add the capped array. But I can't get the instance to initialize without errors so not much progress there.

class DistanceToCameraCapper(VTKPythonAlgorithmBase):
    def __init__(self):
        VTKPythonAlgorithmBase.__init__(self,
        nInputPorts=1, inputType= vtkDistanceToCamera,
        nOutputPorts=1, outputType= vtkDistanceToCamera)

    def RequestData(self, request, inInfo, outInfo):
        print('Executing')
        input = vtk.vtkDistanceToCamera.GetData(inInfo[0])
        output = vtk.vtkDistanceToCamera.GetData(outInfo)

        d2c = vtk.vtkDistanceToCamera()
        d2c.SetInputData(input)
        d2c.Update()
        output.ShallowCopy(d2c.GetOutput())

        return 1

I'd be grateful for any ideas or hints on how to accomplish this idea.

I've attached a demonstration. The red spheres are not scaled. The green spheres are scaled by distance to camera. The purple spheres show the visual behavior that I want. It's using the "fake" method of rendering two sets of spheres on top of each other. One set scaled and the other not.

Thanks,
Travis Stuart
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From aminemzoughi at febus-optics.com  Mon Dec 31 04:44:38 2018
From: aminemzoughi at febus-optics.com (Mohamed Amine Mzoughi)
Date: Mon, 31 Dec 2018 10:44:38 +0100
Subject: [vtkusers] anti-aliasing
In-Reply-To: <YTOPR0101MB129219E60CF60258E927F6E0D8B70@YTOPR0101MB1292.CANPRD01.PROD.OUTLOOK.COM>
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Message-ID: <ed3f93d8-3cbc-b8e7-6869-7fa420e35815@febus-optics.com>

Hello Andras,

Thank you very much, in fact, calling the antialisaing code of 
pqContextView::createWidget() after creating a QVTKOpenGLWidget fixed my 
aliasing problem 
(https://github.com/Kitware/ParaView/blob/master/Qt/Core/pqContextView.cxx#L143)

BTW, I am using an old version of ParaView (and also VTK) as I'm working 
under Centos 7 (but I will update VTK/Paraview when the version 8 is 
released).

Happy New Year 2019.

Amine.

Le 28/12/2018 ? 19:03, Andras Lasso a ?crit?:
>
> Plot axes are not painted correctly when multi-sampling is enabled due 
> to an OpenGL error in vtkTextureObject::CopyFromFrameBuffer, which 
> seems to be related to copying data from the frame buffer.
>
> [ERROR][VTK] 28.12.2018 12:51:01 [vtkTextureObject (0000026457878B60)] 
> (C:\D\S4D\VTK\Rendering\OpenGL2\vtkTextureObject.cxx:1990) - failed at 
> glCopyTexImage2D 32856 1 OpenGL errors detected
>
> 0 : (1282) Invalid operation
>
> Andras
>
> *From:* Andras Lasso
> *Sent:* Friday, December 28, 2018 12:52 PM
> *To:* 'Mohamed Amine Mzoughi' <aminemzoughi at febus-optics.com>; Paulo 
> Carvalho <paulo.r.m.carvalho at gmail.com>; vtkusers at public.kitware.com
> *Subject:* RE: [vtkusers] anti-aliasing
>
> Multi-sampling works well for me (it smoothes lines, etc.) except axes 
> areas appear black. This is probably a VTK bug that should be fixed, 
> but maybe I just have not configured everything correctly.
>
> ParaView uses multi-sampling for anti-aliasing in plots and not FXAA 
> (https://github.com/Kitware/ParaView/blob/master/Qt/Core/pqContextView.cxx#L143, 
> https://gitlab.kitware.com/paraview/paraview/issues/17202). 
> Anti-aliasing in plots works well in Paraview 5.5.2 (smooth lines, 
> properly rendered axes). *There is no antialiasing in plots in 
> ParaView 5.6.0 (lines are jagged), so there may be some multi-sampling 
> related issues in recent VTK version.*
>
> Andras
>
> *From:* Mohamed Amine Mzoughi <aminemzoughi at febus-optics.com 
> <mailto:aminemzoughi at febus-optics.com>>
> *Sent:* Friday, December 28, 2018 10:01 AM
> *To:* Andras Lasso <lasso at queensu.ca <mailto:lasso at queensu.ca>>; Paulo 
> Carvalho <paulo.r.m.carvalho at gmail.com 
> <mailto:paulo.r.m.carvalho at gmail.com>>; vtkusers at public.kitware.com 
> <mailto:vtkusers at public.kitware.com>
> *Subject:* Re: [vtkusers] anti-aliasing
>
> As you can see in the screenshots below, I was unable to smooth 
> vtkChartXY's plot line (displayed on a QVTKOpenGLWidget) plot with 
> UseFXAAOn and setMultiSamples(8) (multi samples is defaulted to 8 anyway).
>
> Changing the surface format's samples number messed badly the 2D 
> charts with black areas. This is what I've done in constructor :
>
> QSurfaceFormat surface = m_widget->format();
> std::cout << "[debug] Qt widget samples = " << surface.samples() << 
> std::endl; // 0 by default (disabled)
> surface.setSamples(8);
> m_widget->setFormat(surface);
>
> Regards.
>
> Le 27/12/2018 ? 22:45, Andras Lasso a ?crit?:
>
>     To activate anti-aliasing, you can enable FXAA in the renderer
>     using renderer.UseFXAAOn() or set number of samples in the render
>     window using renderWindow.setMultiSamples(8) (if you render in a
>     Qt widget, adjust samples property in the window?s surface format
>     - http://doc.qt.io/qt-5/qsurfaceformat.html#setSamples
>     <https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdoc.qt.io%2Fqt-5%2Fqsurfaceformat.html%23setSamples&data=02%7C01%7Classo%40queensu.ca%7C753aca6286994b17a15d08d66cd53b4f%7Cd61ecb3b38b142d582c4efb2838b925c%7C1%7C0%7C636816060432571103&sdata=kKNCZ2h%2FT81oqw77gwhW4lT%2BcLqeLtxOlvFuHOciieY%3D&reserved=0>).
>     Anti-aliasing has impact on performance and may not be compatible
>     with some rendering options.
>
>     Andras
>
>     *From:* vtkusers <vtkusers-bounces at vtk.org>
>     <mailto:vtkusers-bounces at vtk.org> *On Behalf Of *Mohamed Amine Mzoughi
>     *Sent:* Wednesday, December 26, 2018 10:38 AM
>     *To:* Paulo Carvalho <paulo.r.m.carvalho at gmail.com>
>     <mailto:paulo.r.m.carvalho at gmail.com>; vtkusers at public.kitware.com
>     <mailto:vtkusers at public.kitware.com>
>     *Subject:* Re: [vtkusers] anti-aliasing
>
>     Hello again,
>
>     If I do that, the chart is not visible anymore (the Qt widget is
>     all black), if I change the renderer of the vtkContextView also?
>     (the Qt widget is all white) !
>
>     I give up for the moment !
>
>     ParaView is a such complex software, that I can't trace the stuff
>     related to anti-alisaing in it (reverse engineering ParaView it is
>     tough : a complex build system, many layers, proxies, in fact,
>     it's an oriented object mix of a lasagna and spaghetti code !).
>
>     Thanks anyway.
>
>     Le 26/12/2018 ? 16:02, Paulo Carvalho a ?crit?:
>
>         Hi, Mohammed,
>
>         ?? Strange indeed.? Did you create the vtkRender object
>         yourself or you just used the default one returned by
>         GetRenderer()??? If the latter is your case, I recommend
>         creating your own vtkRender:
>
>
>         m_renderer=vtkSmartPointer<vtkRenderer>::New();
>         m_renderer->/UseFXAAOn/();
>
>         ??? vtkFXAAOptions* const aaOpts = m_renderer->GetFXAAOptions();
>         aaOpts->SetRelativeContrastThreshold(0.125);
>         ???? aaOpts->SetHardContrastThreshold(0.045);
>         ???? aaOpts->SetSubpixelBlendLimit(0.75);
>         aaOpts->SetSubpixelContrastThreshold(0.25);
>         aaOpts->SetUseHighQualityEndpoints(true);
>         ???? aaOpts->SetEndpointSearchIterations(12);
>
>         m_view->/GetRenderWindow/()->/AddRenderer/(m_renderer );
>
>         cheers,
>
>         Paulo
>
>         Em qua, 26 de dez de 2018 ?s 12:15, Mohamed Amine Mzoughi
>         <aminemzoughi at febus-optics.com
>         <mailto:aminemzoughi at febus-optics.com>> escreveu:
>
>             Hello Paulo,
>
>             Even without SmoothingOn* instructions, I still have a
>             problem in my 2D charts (I use a subclass of vtkChartXY,
>             same issue with vtkHistogramChart2D, I have rectangles in
>             screen).
>
>             In ParaView, the line is smooth :
>
>
>             whereas in my VTK app, it isn't :
>
>
>
>             I don't know the issue...
>
>             I'm calling the FXAA instructions before Render() in the
>             constructor, I tried even to call them before each call to
>             Render().
>
>             Best regards.
>
>             Le 26/12/2018 ? 14:21, Paulo Carvalho a ?crit?:
>
>                 Hello, Mohamed!
>
>                 ? It seems that your last calls (*SmoothingOn())
>                 conflict with UseFXAAOn().
>
>                 Here is the output I get when I add a call to
>                 PolygonSmoothingOn().? Not only it is not antialiased,
>                 but you can notice the edges triangle strips, visually
>                 ruining the results:
>
>                 image.png
>
>                 This one is rendered with only UseFXAAOn() and some
>                 configuration to the vtkFXAAOptions object like you did:
>
>                 image.png
>
>                 kind regards,
>
>                 Paulo
>
>                 Em qua, 26 de dez de 2018 ?s 10:03, Mohamed Amine
>                 Mzoughi <aminemzoughi at febus-optics.com
>                 <mailto:aminemzoughi at febus-optics.com>> escreveu:
>
>                     Hello,
>
>                     I want to enable Anti-alisaing in my VTK app, so I
>                     took some parameters
>                     from ParaView and it still doesn't work :
>
>                     ???? m_view->GetRenderer()->UseFXAAOn(); // enable AA
>
>                     ???? vtkFXAAOptions* const aaOpts =
>                     m_view->GetRenderer()->GetFXAAOptions();
>                     aaOpts->SetRelativeContrastThreshold(0.125);
>                     aaOpts->SetHardContrastThreshold(0.045);
>                     ???? aaOpts->SetSubpixelBlendLimit(0.75);
>                     aaOpts->SetSubpixelContrastThreshold(0.25);
>                     aaOpts->SetUseHighQualityEndpoints(true);
>                     aaOpts->SetEndpointSearchIterations(12);
>
>                     what am I missing ?
>
>                     Also, m_view->GetRenderWindow()->GetMultiSamples()
>                     => returns 8.
>
>                     and I called also :
>
>                     m_view->GetRenderWindow()->LineSmoothingOn();
>                     m_view->GetRenderWindow()->PolygonSmoothingOn();
>                     m_view->GetRenderWindow()->PointSmoothingOn();
>
>                     Thanks.
>
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From slavd88 at gmail.com  Mon Dec 31 07:17:44 2018
From: slavd88 at gmail.com (bdemin)
Date: Mon, 31 Dec 2018 05:17:44 -0700 (MST)
Subject: [vtkusers] How to dynamically update vtkTextActor input in an
 animation?
Message-ID: <1546258664985-0.post@n5.nabble.com>

I have a 3D simulation done in VTK with a text actor which displays the
current runtime. My inefficient way of doing that is creating a vtkTextActor
object in each frame which holds the current runtime in seconds as input and
deleting the TextActor from the last frame. All of that happens inside a
repeating vtkTimerCallback function. On each frame I create and delete a
vtkTextActor.

Is there a way to dynamically update the SetInput() method of vtkTextActor
and then showing the new text on each execution of vtkTimerCallback? In
other words - using the same vtkTextActor and updating it on each frame
rather than creating\deleting actors.



--
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