[vtkusers] vtkVolumeReader

[Vetria Byrd]

Sorry about the reply, I was hitting the reply to and not reply to all.

 

I am trying to create a 3D volume (a 5x5x5 cube).

The data files (5 files - one for each slice) consists of zero's and one's
where the one's indicate there is an object in that particular cell of the
cube, zero's indicate the cell is empty.  I want to render the cube/object
using the marching cubes algorithm.

 

Vetria

 

 

-----Original Message-----
From: Amy Henderson [mailto:amy.henderson at kitware.com] 
Sent: Monday, April 05, 2004 1:42 PM
To: byrdv at cis.uab.edu; 'Amy Henderson'
Subject: RE: [vtkusers] vtkVolumeReader

 

Vetria,

I just noticed the you replied only to me and not the the vtkusers list.
Please keep the discussion on the list so other people can help if necessary
and so there is a record of the solution to this problem if other people
encounter the same thing.

What kind of data are you trying to load? Depending on the type of your
data, you might want to try loading it using one of the subclasses of
vtkImageReader2. These readers can handle 3D data by reading in a series of
2D slices.

- Amy

At 02:32 PM 4/5/2004, Vetria Byrd wrote:



When I try creating an instance of vtkVolume16Reader the code complies with
no errors but when I try to run it I get:
 
ERROR: In C:\Program Files\vtk42\IO\vtkVolume16Reader.cxx, line 375
vtkVolume16Reader (0x022B5400): Error reaading raw pgm data!
 
So, I thought I would try vtkVolumeReader.
 
Vetria
 
-----Original Message-----
From: Amy Henderson [mailto:amy.henderson at kitware.com] 
Sent: Monday, April 05, 2004 12:14 PM
To: byrdv at cis.uab.edu; 'Amy Henderson'
Subject: RE: [vtkusers] vtkVolumeReader
 
Did you intend to create an instance of vtkVolume16Reader? vtkVolumeReader
has a pure virtual method, so you can't instantiate it; you have to create
an instance of one of its concrete subclasses (e.g., vtkVolume16Reader,
which I see in your list of include files).

- Amy

At 01:08 PM 4/5/2004, Vetria Byrd wrote:

Yes.
 
Here's the entire file:
 
//
// This example reads a volume dataset, extracts an isosurface and displays
it.
//
 
#include "vtkRenderer.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkVolume16Reader.h"
#include "vtkVolumeReader.h"
#include "vtkObject.h"
#include "vtkMarchingCubes.h"
#include "vtkPolyDataMapper.h"
#include "vtkActor.h"
#include "vtkOutlineFilter.h"
#include "vtkCamera.h"
#include "vtkProperty.h"
#include "vtkPolyDataNormals.h"
#include "vtkContourFilter.h"
 
int main (int argc, char **argv)
{
  if (argc < 2)
    {
      cout << "Usage: " << argv[0] << " DATADIR/cube/slice" << endl;
    return 1;
    }
 
 
  vtkRenderer *ren = vtkRenderer::New();
  vtkRenderWindow *renWin = vtkRenderWindow::New();
    renWin->AddRenderer(ren);
  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(renWin);
  
 *vtkVolumeReader *volReader = vtkVolumeReader::New();
    volReader->SetImageRange (1,5);
    volReader->SetFilePrefix (argv[1]);
    volReader->SetDataSpacing (1,1,1);
    volReader->Update();
 
  // An isosurface, or contour value of 1 is known to correspond to the
object. 
  vtkMarchingCubes *iso =vtkMarchingCubes::New();
     iso->SetInput(volReader->GetOutput() );
     iso->SetValue(0,1);  
 
  vtkPolyDataMapper *isoMapper = vtkPolyDataMapper::New();
      isoMapper->SetInput(iso->GetOutput() );
      isoMapper->ScalarVisibilityOff();
             
  vtkActor *isoActor = vtkActor::New();
      isoActor->SetMapper(isoMapper);
  
  vtkOutlineFilter *outline = vtkOutlineFilter::New();
      outline->SetInput( (vtkDataSet *) volReader->GetOutput() );
     
   vtkPolyDataMapper *outlineMapper = vtkPolyDataMapper::New();
      outlineMapper->SetInput(outline->GetOutput() );
   
   vtkActor *outlineActor = vtkActor::New();
      outlineActor->SetMapper(outlineMapper);
      outlineActor->VisibilityOff();
      
   //
   // Add the actors to the renderer, set the background and size
   //
   ren->AddActor(outlineActor);
   ren->AddActor(isoActor);
   ren->SetBackground(0.2,0.3,0.4);
   renWin->SetSize(450,450);
   ren->GetActiveCamera()->Elevation(90);
   ren->GetActiveCamera()->SetViewUp(0,0,-1);
   
   iren->Initialize();
   
   // render the image
   iren->Start();
   
 
   return 0;
}
 
-----Original Message-----
From: Amy Henderson [mailto:amy.henderson at kitware.com] 
Sent: Monday, April 05, 2004 11:59 AM
To: byrdv at cis.uab.edu; 'vtkusers'
Subject: Re: [vtkusers] vtkVolumeReader
 
Vetria,

Did you include the vtkVolumeReader header file (#include
"vtkVolumeReader.h")?

- Amy

At 12:47 PM 4/5/2004, Vetria Byrd wrote:

I have manually created data files that consists of zero's and one's (no
header info) to resemble a (5x5x5) 3D cube.
There are 5 data files.  When I try to use vtkVolumeReader I get the
following error message:
 
error C2440: 'initializing' : cannot convert from 'class vtkObject *' to
'class vtkVolumeReader *'
        Types pointed to are unrelated; conversion requires
reinterpret_cast, C-style cast or function-style cast
 
This is where the error occurs:
:
:
 
  vtkVolumeReader *volReader = vtkVolumeReader::New();
    volReader->SetImageRange (1,5);
    volReader->SetFilePrefix (argv[1]);
    volReader->SetDataSpacing (1,1,1);
    volReader->Update();
 
Any assistance will be greatly appreciated.
Thanks,
_______________
Vetria L. Byrd
 
 

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