Hi,
First I want to explain a bit the system we are using.
We have 8 projector rear projection system with projection arranged in 2X4 grid 
like this

P P P P
P P P P

Top row is handled by one QuadroPlex 7000 and second row by other QuadroPlex 
7000.

1. Low FPS with QT-> I am using Qt with worldviz vizard (Third party library 
based on OSG. you can see that on worldviz website) . I have created a 
QmainWindow and created a new widget and set the vizard graphics context 
between that new widget and set that widget as central widget of QMainWidget.

When I am running the application in fullscreen mode, the FPS in 2D is 15 and 
in 3D is 30. Thing is if I resize the window so that the window is only in top 
projectors region ie. I decrease the height and take window in upper projector 
row region, the FPS is 60. Also lets say window is partially in upper row and 
partially in bottom row then also FPS is 15 and 30. In short, if any part of 
window is visible in bottom row projectors FPS decrease to 15 and 30 else it 
stays 60.

Also if I run the vizard without Qt, everything runs fine.

Also, If I remove all the menus and dockWidgets from the Qt (vizard is set to 
centralWidget of QmainWindow), It runs fine. So when the Qt is visible, the FPS 
goes down but we have another application using OSG and Qt, it runs fine. I 
have tried that.
So problem is when I run my vizard application with QT on multiple display 
system.

Any help..

Thank you!

Cheers,
pankaj

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http://forum.openscenegraph.org/viewtopic.php?p=54498#54498





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