[vtkusers] vtkProp3D and rotation

[Byoung-moon you]

Hello vtkusers,

I have used vtkVolume with SetUserTransform and
SetUserMatrix 
methods to rotate a volume object. 
The volume should have a predefined orientation, such
as anterior view, 
before any transformation is performed. 
That has been worked well with vtkVolume.

However, as you know, it is slow for a large medical
volume object 
and I thought it would be nice to have vtkProp3D for 
a faster 
rendering. 

Based on my experience so far, vtkProp3D doesn't seem
support SetUserMatirx 
or SetUserTransform either.

so my questions are,
1) is there a way that I can use the UserSetMatrix or
SetUserTransform 
methods?
2) vtkProp3D supports RotateX/Y/Z methods to rotate
volume object.
But, these methods rotate the volume object from
previous orientation. 
How can I rotate the volume object from a predefined
orientation, 
for example SetOrientation 0.0 0.0 0.0.

Any help/advice would be appreciated .

Thank you.

Byoung-moon You 



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