[vtkusers] Callbacks for vtkCamera

[Drew McCormack]

I have a situation where I need to keep my VTK view in synch with a  
model data layer. If the camera properties change, I need to receive a  
callback for that and update the model.

I can't see any callbacks defined for the camera, other than resetting  
and something for the clipping planes.

Is there a simple way to observe changes in camera position? Or am I  
better off observing the interactor?

Drew