[vtkusers] vtkImageClip in a loop

[Madhusudhanan Balasubramanian]

Hi all,
 
when I update the extents to be clipped using vtkImageClip in a for loop, though I call Update() method explicitly after setting new extents, the getOutput()->GetScalarPointer() always gets the same memory address and the data.  Should I do something to request it to update the pipeline in another way?
 
imageClip->SetInput(imageVolume);
extents = imageVolume->GetExtent();
 
for (z = 0; z < zLimit; z++){
   extents[4] = extents[5] = z;
   imageClip->SetOutputWholeExtent(extents);
   imageClip->Update();
 
   //here imageClip->GetOutput()->GetScalarPointer() always returns the same memory address and data.
}
 
Thanks,
Madhu.

		
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