I'm working with OpenSceneGraph 3.0.1 (the latest stable) and Qt. OSG has a module named osgQt to create a widget for OSG rendering. I have noticed a strange frame rate drop switching from Qt 4.7 to 4.8. With 4.7.3, the frame rate was maximum 60fps on every computer. With 4.8 the frame is maximum 38-40fps on every computer. Definitely too much to accept. I cannot understand why! Is it a bug or what?
Asked
Active
Viewed 604 times
3
-
I see there is a duplicate of this post, with several messages following it up, at http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/2012-March/056916.html – Clare Macrae Mar 12 '12 at 10:45
-
I know, it's me, thanks ;) But still there is no solution. – Marco Fiocco Mar 12 '12 at 12:04
-
I mentioned it for the benefit of other readers! :-) – Clare Macrae Mar 12 '12 at 15:36
-
There were several bugs in Qt 4.8.0 related to framerate dropdown. Did you try with Qt 4.8.1 ? [link](https://bugreports.qt-project.org/browse/QTBUG-23253) and [link](https://bugreports.qt-project.org/browse/QTBUG-24602) – azf Jun 15 '12 at 07:40
-
Yep, with 4.8.1 now I'm back to 60fps! – Marco Fiocco Jul 20 '12 at 14:09