[vtkusers] on & offscreen render windows

[Michael Bonner]

Hello vtk users,

I am trying to use two vtkRenderWindows w/ two vtkRenderes in a single 
application. One of the render windows is offscreen, the other is not.  I 
would like to use the on screen render window for interaction, but, when a 
mouse key release event happens I would like the offscreen window to 
render.  I have included a small application that produces my problem. When 
the offscreen window goes to render during the key release event the 
onscreen window is effected.   I have not been able to diagnose my problem, 
everything seems to be behaving as expected, but my window, which was, 
prior to the offscreen render, being changed as I moved the mouse, is no 
longer changing. The interactor seems to still be handling events, and the 
render window is continuing to render, but the image on screen is not changing.

My understanding of OpenGL is limited to a single undergrad intro course, 
and I know even less about X windows, if anybody could offer any 
suggestions at all I would greatly appreciate it.

Thanks for your time
Mike Bonner
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