[vtkusers] Creating a slice of an ImageData

[Jefferson Thomas]

Hi,
How to create a slice from a 3D ImageData ? Ive been doing it with
vtkImageDataGeometryFilter with SetExtent but in this way it is only
possible to make a slice parallel to xy, xz or yz plane. I cant figure
out a way to get a diagonal slice.
Is there any smart way to create a slice for any arbitrary surface ?
Thank you for any help,
Thomas