[vtkusers] Viewport clipping

[Doug Hoppes]

Hey all,

                Running into a critical issue and not sure where to turn.  We've been using vtkViewport for a while and never seem to have an issue with them.  However, just updated the software and moved to OpenGL2 and now running into an issue.  Some of the viewports seem to be clipped.  I can move my objects without a problem in them but, in one case, vtkImageActor, the display is clipped.

                Is there a particular place I can look at in the code to see what is happening?  The vtkViewport code seems to have the correct port size.  Where is the display rendering done?  I've noticed that, if I use a sphere actor or any general surface actor, there doesn't seem to be a problem.  It only happens when I'm rendering a volume or an image actor.

Doug

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