[vtkusers] Extracting volume data from a cylinder

[Brad Arthur]

Hello,

I would like to be able to process data defined by a cylinder that I
position within my volume data.  I can display the volume data and cylinder
(using vtkCylinderSource) with no problems, but I just can't figure out how
to extract the data that is within the cylinder.  Does anybody have any
ideas?

This is what I have so far:
http://www.evscorp.com/im/capture.jpg

Thanks,
Brad Arthur