[vtkusers] Why does this give a "3D texture not supported" error?

[Diptansu Das]

Hi everyone,
I am trying to read some data using the ITK ImageFileReader, then after
doing thresholding I am trying to import it into VTK and display it using
VTK. If I use the itk image as input to the VTK importer then I don't have
any problem. But if I threshold it first then VTK gives an error "3D texture
not supported". The code is like this:

  typedef itk::Image< PixelT, 2> ImageT;
  typedef itk::ImageFileReader< ImageT > ReaderT;
  typedef itk::Image< unsigned char, 2 > UCharImageT;
  typedef itk::BinaryThresholdImageFilter< ImageT, UCharImageT > ThresholdT;
  typedef itk::VTKImageExport< UCharImageT > ExportFilterT;

    ReaderT::Pointer reader = ReaderT::New();
    reader->SetFileName( fullFilePath.c_str());
    reader->Update();

    ThresholdT::Pointer thresholder = ThresholdT::New();
    thresholder->SetInput( reader->GetOutput() );
    thresholder->SetOutsideValue( 0 );
    thresholder->SetInsideValue( 255 );
    unsigned char component[3];
    component[0] = component[1] = component[2] = 0;
    thresholder->SetLowerThreshold( component );
    component[0] = component[1] = component[2] = 200;
    thresholder->SetUpperThreshold( component );

    ExportFilterT::Pointer itkExporter = ExportFilterT::New();
    itkExportFilters.push_back( itkExporter );
    itkExporter->SetInput( thresholder->GetOutput() );     // If instead I
use reader->GetOutput() then there is no error.
    itkExporter->Update();

    vtkImageImport* vtkImporter = vtkImageImport::New();
    ConnectPipelines(itkExporter, vtkImporter);

  voi = vtkExtractVOI::New();
  voi->SetInput( vtkImporter->GetOutput() );
  voi->SetVOI( 0, 1023, 0, 1023, 0, 0);
  texture = vtkTexture::New();
  texture->SetInput( voi->GetOutput() );
  texture->InterpolateOn();
  texture->SetLookupTable( colorMap );

  map = vtkPolyDataMapper::New();
  map->SetInput( imagePlane->GetOutput() );

  actor = vtkActor::New();
  actor->SetMapper( map );
  actor->SetTexture( texture );

  ren = vtkRenderer::New();
  ren->AddActor( actor );
  double x, y, z;
  x = y = z = 0.0;
  //ren->GetActiveCamera()->GetPosition(x, y, z);
  //std::cout << "Camera position: x = " << x << ", y = " << y << ", z = "
<< z << std::endl;
  //ren->GetActiveCamera()->SetPosition(0.0, 0.0, 1.0);
  ren->SetBackground(0.0, 0.0, 0.0 );


I posted this in the VTK list because the error was being thrown by VTK. If
this is not the best place for it please do tell me.


Cheers,
D
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