[vtkusers] Position of Camera

[Patrice Aussems]

Hi, 

I develop a RayCastVolumeRendering (in C++) of a head and I want to
implement an "invisibility sphere" around my Camera to be able to view
something when I am in the middle of the head.  So, I need the position
of the Camera at each time (when I zoomed with mouse inside the head),
how can I implement this ?? 

I use VTK 4.2 with VtkQt 1.5 of Denis P. Shamonin under Mandrake 10.0

Thanks,

Patrice Aussems

PS : sorry for my english.