[vtkusers] rotating vtkpropassembly

[Xu Zhong Hao]

Hi All

i have some problem getting the transformation matrix of a 
vtkpropassembly, i added image actors and actors as parts of the 
propassembly and set the assembly pickable. i define an endpick user 
callback to get the transformation matrix using getmatrix() inherited 
by the propassembly. i hope to rotate the propassembly as a whole 
rather than rotating the individual actors or image actor or the 
camera, when i press p after i run the program, it crashes.

anyone got any idea about this??

Zhong Hao