[vtk-developers] Issue with vtkRenderer::ResetCameraClippingRange() (+bug tracker)

[Mathieu Malaterre]

I have open a bug report for this issue.

http://public.kitware.com/Bug/view.php?id=9306

Thanks for comments.

On Mon, Dec 22, 2008 at 6:37 PM, Mathieu
Malaterre<mathieu.malaterre at gmail.com> wrote:
> Hello there,
>
>  I have written up a small example to exhibit an issue I am having
> with VTK 5.2:
>
> https://gdcm.svn.sourceforge.net/svnroot/gdcm/Sandbox/VTK
>
>  If you start the small app :
>
>  $ ./test /usr/share/VTKData/Data/headsq
>
> The first slice of the headsq is shown (vtkImageViewer2). Now press a
> couple of time 'space' and you'll be iterating over each slice. You'll
> notice quickly that the ending slice are all black. Now restart the
> experience but leave the initial spacing of 1.5 for the Z direction
> and you'll see that all slice will be shown.
>
>  Could someone please let me know what I am missing after calling
> vtkRenderer::ResetCameraClippingRange() (AFAIK as I know there should
> not be anything else required).
>
> Thank you, and happy new year.
> --
> Mathieu
>
> #include "vtkImageViewer2.h"
> #include "vtkCommand.h"
> #include "vtkRenderWindowInteractor.h"
> #include "vtkRenderer.h"
> #include "vtkTestUtilities.h"
> #include "vtkImageReader.h"
>
> class vtkGDCMObserver : public vtkCommand
> {
> public:
>  static vtkGDCMObserver *New()
>    {
>    return new vtkGDCMObserver;
>    }
>  vtkGDCMObserver()
>    {
>    ImageViewer = NULL;
>    }
>  ~vtkGDCMObserver()
>    {
>    }
>  virtual void Execute(vtkObject *caller, unsigned long event, void*
> /*calldata*/)
>    {
>    if ( this->ImageViewer )
>      {
>      vtkRenderWindowInteractor * rwi =
> vtkRenderWindowInteractor::SafeDownCast( caller );
>      if ( event == vtkCommand::CharEvent )
>        {
>        char keycode = 0;
>        if( rwi ) keycode = rwi->GetKeyCode();
>        int max = ImageViewer->GetSliceMax();
>        int slice = (ImageViewer->GetSlice() + 1) % ++max;
>        ImageViewer->SetSlice( slice );
>        ImageViewer->GetRenderer()->ResetCameraClippingRange();
>        ImageViewer->Render();
>        }
>      }
>    }
>  vtkImageViewer2 *ImageViewer;
> };
>
> int main(int argc, char *argv[])
> {
>  char* fname =
>    vtkTestUtilities::ExpandDataFileName(argc, argv, "Data/headsq/quarter");
>
>  vtkImageReader *reader = vtkImageReader::New();
>  reader->SetDataByteOrderToLittleEndian();
>  reader->SetDataExtent(0,63,0,63,1,93);
>  //reader->SetDataSpacing(3.2, 3.2, 1.5); //ok
>  reader->SetDataSpacing(3.2, 3.2, 10.5); // not ok
>  reader->SetFilePrefix(fname);
>  reader->SetDataMask(0x7fff);
>
>  delete [] fname;
>
>  vtkImageViewer2 *viewer = vtkImageViewer2::New();
>  viewer->SetInput(reader->GetOutput());
>
>  //viewer->SetColorLevel (0.5 * (range[1] + range[0]));
>  //viewer->SetColorWindow (range[1] - range[0]);
>
>  vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
>  viewer->SetupInteractor (iren);
>  viewer->Render();
>
>  vtkGDCMObserver *obs = vtkGDCMObserver::New();
>  obs->ImageViewer = viewer;
>  iren->AddObserver(vtkCommand::CharEvent,obs);
>  obs->Delete();
>
>  iren->Initialize();
>  iren->Start();
>
>  reader->Delete();
>  viewer->Delete();
>  iren->Delete();
>
>  return 0;
> }
>



-- 
Mathieu
http://mathieumalaterre.com