[vtkusers] Locking camera rotation along camera axis

[Jahn Otto Næsgaard Andersen]

I am using a vtkRenderWindowInteractor with interactor style
vtkInteractorStyleTrackballCamera. I need to restrict camera rotation so
that the camera can't be rotated around the view axis. In other words, the
camera's x axis shall always be in the world's xy plane.

How can I achieve this?
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20121015/00ea74bc/attachment.htm>