[vtkusers] Reading DICOM using vtkImageActor

[Sam Raby]

Hi,

I am trying to read DICOM series using vtkImageActor. (Note: I know I can
read them easily by vtkImageViewer2, however it is not suitable for my
application).

The problem is when I use SetZSlice, it does not update the slice and it
always shows the first slice of DICOM. I call SetZSlice in both
vtkImageActor and vtkImageMapper but it does not change the slice.

Thanks for any tips, and here is my simple code:

    // DICOM Reader

    vtkSmartPointer<vtkDICOMImageReader> reader =
vtkSmartPointer<vtkDICOMImageReader>::New();

    reader->SetDirectoryName("/home/Images/DICOM");

    reader->Update();


    // Mapper

    vtkSmartPointer<vtkImageMapper> imageMapper =
vtkSmartPointer<vtkImageMapper>::New();

    imageMapper->SetInputData(reader->GetOutput());

    imageMapper->SetZSlice(12); // does not work.


    // Actor

 vtkSmartPointer<vtkImageActor> mapActor = vtkSmartPointer<vtkImageActor>::
New();

    mapActor->SetInputData(imageMapper->GetInput());

    mapActor->SetZSlice(12); // this also does not work.


    // Visualization

    vtkRenderer *ren=vtkRenderer::New();

    ren->AddActor(mapActor);

    ren->ResetCamera();


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

    renderWindow->AddRenderer(ren);


    vtkSmartPointer<vtkRenderWindowInteractor> iren =
vtkSmartPointer<vtkRenderWindowInteractor>::New();

    iren->SetRenderWindow(renderWindow);

    iren->Start();
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