[vtkusers] I have some trouble in display a volume data

zhq 15891495523 at 126.com
Sun Dec 29 05:07:23 EST 2013

Dear all :
      I want to display a volume data .
      I use the vtkVolumeRayCastCompositeFunction class .
      but the result makes me crazy 
      I check the pixel with MITK , and I find only the vessel's pixel is
bigger than 10 . Also , I check the pixel with matlab
      But when I want to check the pixel with VTK , the result is -67044352
, I just can't believe it !
      int * p = (int *)reader->GetOutput()->GetScalarPointer(100,100,0);
     Could somebody give me some ideas!
     Thanks in advance!

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