[vtkusers] Keeping a vtkImageResliceMapper slice plane in sync with the vtkImageSlice

[Giuseppe D'Angelo]

Hello,

the slice plane set into a vtkImageResliceMapper is documented to be in 
world coordinates, not data coordinates. This means that changing the 
transformation on the prop used to show it (in my case, a vtkImageSlice) 
will break the shown slice if the plane is not updated.

I worked around this issue by installing a vtkTransform on the vtkPlane 
used for slicing, and the keeping this transformation in sync with the 
prop's one.

I was wondering: is there a convenience method to do this that I 
overlooked? It seemed "natural" to me that scaling or translating the 
prop shouldn't affect the piece of data that it's being sliced.

Thank you,
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Giuseppe D'Angelo | giuseppe.dangelo at kdab.com | Software Engineer
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