[vtkusers] vtkSplineWidget and SetPlaneSource

[dsjen at cs.unc.edu]

VTK Users,

I'm using vtkSplineWidget and would like to call SetPlaneSource, so 
that I can call ProjectToPlaneOn, thus allowing me to only move my 
spline nodes within the specified plane.  However, I'm not able to set 
it to the correct plane apparently.

The plane I'd like to use SetPlaneSource on has had its mapper 
transformed.  I've tried to create another plane and setting the 
center to the actor position, but that doesn't work.  When I render 
the scene, my widget ends up very far off.  If anyone has any ideas, 
please let me know.

Thanks,
Dennis