[vtkusers] Why do my vtkRenderWindows divide up the frame rate?

[Kirchner, Thomas]

Hello everyone,

i am trying to get multiple vtkRenderWindows to render (4 different 
image streams in my case) simultaneously at 60fps which seems to be the 
frame rate limit for one single vtkRenderWindow (at least with my 
screen). It appears to me that multiple render windows in the same 
application share those 60fps ... e.g. yielding exactly 15fps for 4 windows.
If i just start a new application for each window this does not occur 
(which gives me hope but doesn't help)

I can't figure out why this frame rate limit is "shared" and i dont think 
this behavior is intended. But maybe you guys know how i can avoid this
effect?
(my simple example, mostly stitched together from other example code is 
attached)

Any help would be greatly appreciated.

Thanks in advance
Thomas

-- 
Thomas Kirchner
German Cancer Research Center (DKFZ)
Division Medical and Biological Informatics
E131 - Computer-assisted Interventions

Im Neuenheimer Feld 280
69120 Heidelberg, Germany
Tel.: +49 (0) 6221 / 42-3543
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