[vtkusers] vtkImageCast Extent-problem

[Florian Schmidt]

Hi,

i have a volume rendering pipeline which is very basic and the first step in it is a vtkImageCast to get the data into unsigned short format. Now here's the problem:

The first vtkImageData which is fed into the pipeline is rendered correctly, but when i lateron change the input of the vtkImageCast to a new vtkImageData [with a different Extent], somehow only the old extent is rendered.

Here's some more details: First i setup the rendering pipeline with some dummy data which is vtkImageData with an extent like 0,32,0,32,0,32. Lateron upon user interaction i want to render a volume of extent 0,256,0,128,0,64, but only the part of this imagedata which fits into the 0,32,0,32,0,32 extent is rendered.. what am i doing wrong? Can i somehow tell the pipeline to propagate the changed extent from the start to the end?

If you need more details or example code, let me know..

T.I.A. Florian Schmidt