[vtkusers] vtkFollower and SetScale Problem...

[Paul Tait]

I have an app displaying reservoir data too !!!

I use a vtkTextProprty with the vtkTextActor and set the font

TextActor = vtkTextActor::New();
TextProperty = vtkTextProperty::New();
TextProperty->SetFontFamilyToArial();
TextProperty->SetFontSize(15);
TextProperty->SetBold(1);
TextProperty->ShadowOn();
TextProperty->SetColor(1.0, 1.0, 1.0);
TextActor->SetTextProperty(TextProperty);
That pretty much handles getting the size right for me

Paul Tait

----- Original Message ----- 
From: "Andrea Gavana" <andrea.gavana at polymtl.ca>
To: <vtkusers at vtk.org>
Sent: Monday, July 12, 2004 5:21 PM
Subject: [vtkusers] vtkFollower and SetScale Problem...


> Hello NG,
>
>       I'm having a problem using vtkVectorText + vtkFollower. I have a 3D
grid
> (representing an oil reservoir) and I can display it together with a 3D
cell
> mesh (wireframe of surface) and a polydata lines (representing the wells
in the
> oil reservoir). What I would like to do, is to place a text above each
well, in
> order to show the name of this well... so, I've tried vtkVectorText +
> vtkFollower, but I'm having some problem:
>
> 1) The grid coordinates have different order of magnitude (0<=x<=20000,
> 0<=y<=20000, 0<=z<=300), so I have to scale the grid by using SetScale.
For the
> same reason, I have to scale the Polydata that represents the wells in the
> reservoir;
>
> 2) Once I try to visualize the well names (using vtkVectorText +
vtkFollower),
> the text is always too far away from the well, even if I give to the text
the
> same position of the first point of the line that represent the well. It
seems
> to me that no matter which z-coordinate I give to vtkFollower, the
position is
> always the same.
>
> 3) If I remove the SetScale on the 3D grid+Wireframe+Polydata, the text
> position is almost correct (eve if the text is too big...). Unfortunately,
I
> need to change the scale in order to understand something from the figure.
>
> I post the relevant part of the code... does anyone have a suggestion?
Thank
> you a lot.
>
> Andrea.
>
> # CODE BEGIN
> # HERE the variable "nanna" represents my matrix of 3D coordinates for the
grid
> # HERE the variable "zcentout" is only to assing a color to the points
>
> vtk_xyz = vtkpython.vtkFloatArray()
> vtk_xyz.SetNumberOfTuples(8*nx*ny*nz)
> vtk_xyz.SetNumberOfComponents(3)
> vtk_xyz.SetVoidArray(Numeric.ravel(nanna),24*nx*ny*nz,1)
>
> vtk_pts = vtkpython.vtkPoints()
> vtk_pts.SetNumberOfPoints(8*nx*ny*nz)
> vtk_pts.SetDataTypeToFloat()
> vtk_pts.SetData(vtk_xyz)
>
> # create vtk data
> a = vtkpython.vtkStructuredGrid()
> a.SetDimensions(2*nx, 2*ny, 2*nz)
> a.SetPoints(vtk_pts)
>
> # create scalars
>
> vtk_scal = vtkpython.vtkFloatArray()
> vtk_scal.SetNumberOfTuples(8*nx*ny*nz)
> vtk_scal.SetNumberOfComponents(1)
> vtk_scal.SetVoidArray(Numeric.ravel(zcentout),8*nx*ny*nz,1)
>
> a.GetPointData().SetScalars(vtk_scal)
>
> # create tubes to represent the wells
>
> profileTubes = vtkpython.vtkTubeFilter()
> profileTubes.SetRadius(70.0)
>
> # read VTK file with well position/coordinates
>
> reader = vtkpython.vtkPolyDataReader()
> reader.SetFileName("mywells.vtk")
>
> mapsurface = vtkpython.vtkDataSetMapper()
> mapedge = vtkpython.vtkDataSetMapper()
>
> meshGeom = vtkpython.vtkExtractGrid()
> meshGeom.SetInput(a)
>
> mapsurface.SetInput(meshGeom.GetOutput())
> mapedge.SetInput(meshGeom.GetOutput())
>
> profileTubes.SetNumberOfSides(10)
> profileTubes.SetInput(reader.GetOutput())
>
> profileMapper = vtkpython.vtkPolyDataMapper()
> profileMapper.SetInput(profileTubes.GetOutput())
>
> # This is the 3D grid
> actsurface = vtkpython.vtkActor()
> actsurface.SetMapper(mapsurface)
>
> # This is the 3D wireframe
> actedge = vtkpython.vtkActor()
> actedge.SetMapper(mapedge)
>
> # This are the wells
> profileactor = vtkpython.vtkActor()
> profileactor.SetMapper(profileMapper)
>
> data_range = a.GetScalarRange()
> mapsurface.SetScalarRange(data_range)
> mapsurface.ScalarVisibilityOn()
> mapedge.SetScalarRange(data_range)
> mapedge.ScalarVisibilityOff()
>
> actsurface.GetProperty().SetRepresentationToSurface()
> actsurface.SetScale(1.0,1.0,6.0)
> actsurface.SetOrientation(135.0,0.0,0.0)
>
> actedge.GetProperty().SetRepresentationToWireframe()
> actedge.GetProperty().SetLineWidth(1.5)
> actedge.SetScale(1.0,1.0,6.0)
> actedge.SetOrientation(135.0,0.0,0.0)
> actedge.GetProperty().SetColor(1,1,1)
> actedge.GetProperty().SetAmbient(1.0);
> actedge.GetProperty().SetDiffuse(0.0);
> actedge.GetProperty().SetSpecular(0.0);
>
> # TRY TO POSITION THE TEXT   <---- HELP HELP HELP
> atext = vtkpython.vtkVectorText()
> atext.SetText("MY WELL")
> textMapper = vtkpython.vtkPolyDataMapper()
> textMapper.SetInput(atext.GetOutput())
> textActor = vtkpython.vtkFollower()
> textActor.SetMapper(textMapper)
>
> xmin, xmax, ymin, ymax, zmin, zmax = actsurface.GetBounds()
> xmin1, xmax1, ymin1, ymax1, zmin1, zmax1 = profileactor.GetBounds()
> xmin = min(xmin,xmin1)
> ymin = min(ymin,ymin1)
> zmin = min(zmin,zmin1)
> xmax = max(xmax,xmax1)
> ymax = max(ymax,ymax1)
> zmax = max(zmax,zmax1)
>
> scale = max((xmax-xmin),(ymax-ymin),(zmax-zmin))/40.0
>
> textActor.SetOrigin(0,0,0)
> # self.wellt represent the well coordinates
> textActor.SetPosition(self.wellt[0,0],self.wellt[0,1],self.wellt[0,2])
> textActor.SetScale(scale, scale, scale)
> textActor.GetProperty().SetColor(1, 1, 1)
> textActor.PickableOff()
>
> # TRY TO POSITION THE TEXT   <---- HELP HELP HELP END
>
>
> profileactor.GetProperty().SetColor(dim_grey)
> profileactor.GetProperty().SetInterpolationToGouraud()
> profileactor.GetProperty().SetBackfaceCulling(0)
> profileactor.GetProperty().SetSpecular(.5)
> profileactor.GetProperty().SetSpecularPower(100.0)
> profileactor.GetProperty().SetAmbient(1.0)
> profileactor.SetScale(1.0,1.0,6.0)
> profileactor.SetOrientation(135.0,0.0,0.0)
>
> self.window = wxFrame(None, -1, "VTK Reservoir Surface", wxPoint(100,10),
wxSize
> (1000,900),
>
> style=wxDEFAULT_FRAME_STYLE|wxRESIZE_BORDER|wxNO_FULL_REPAINT_ON_RESIZE)
>
> hiwin = wxVTKRenderWindow(self.window,-1,1)
>
> hirenWin = hiwin.GetRenderWindow()
>
> hiren = vtkpython.vtkRenderer()
> hiren.SetRenderWindow(hirenWin)
>
> hiren.AddActor(actsurface)
> hiren.AddActor(actedge)
> hiren.AddActor(textActor)
> hiren.AddActor(profileactor)
>
> hirenWin.AddRenderer(hiren)
> hiren.GetActiveCamera().Zoom(1.5)
> textActor.SetCamera(hiren.GetActiveCamera())
>
> self.window.Show(TRUE)
>
> iren = wxVTKRenderWindowInteractor(self.window, -1,1)
> iren.SetRenderWindow(hirenWin)
>
> dlg.Destroy()
>
> self.renwin = hirenWin
> iren.Initialize()
> iren.Start()
>
>
> _______________________________________________
> This is the private VTK discussion list.
> Please keep messages on-topic. Check the FAQ at:
<http://public.kitware.com/cgi-bin/vtkfaq>
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers


---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.718 / Virus Database: 474 - Release Date: 7/9/2004