[vtkusers] HELP!! Rotation!!

[marisa aurelio]

Hi vtkUsers,

I have 2 polydata and I want to rotate one of them. But when I do 
'rotateWXYZ(180, 0, 0, 1)' the polydata rotates but does not maintain his 
center.
What I would like to do was rotate the polydata but maintain the center of 
it, for example in the Y axis.
For example, I have several contours in the same position and I want to 
rotate them, maintain their center, in order to form a ball.

How can I do this???

Thanks in advance,
Marisa.

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