Hi Louis, Getting a high frame rate for the OSG is just down to it doing it's job, it's designed to have low overheads and send data to OpenGL efficiently.
To keep the frame rate down to sensible values you should enable vysnc in your drivers, this will result in high quality visuals - no tearing, lower power usage, lower heat generation and lower noise - normally this will be down to the fans not having to run higher, but in your case it sounds like the electronics at resonating somewhere. The only time you should disable vsync is when you need to do some specific performance testing, which shouldn't be too often during the life cycle of your app development. The fact that drivers don't enable vsync by default is pretty disgraceful and inexcusable ignorance of actual visual quality over marketting. If your framerate < vertical refresh of your display system then you want high frame rates, if the framerate > vertical refresh then it's totally wasted and throws away visual quality. Robert. On Mon, Nov 22, 2010 at 10:53 AM, Louis Ixo <[email protected]> wrote: > Hi Juan, > Thanks for your advice. > > Yes also glxgears produces this noise. > I plugged my headset, and yes I can head a very light similar noise. > > I measured the FPS of my opengl applications vs osg examples and I'm getting > (measured with Fraps): > Opengl application: 1- 140 FPS > OSG tutorials: 900 - 2000 FPS > > So probably it's the number of frames that causes this issue. > > Why OSG uses this enormous number of frames to show static objects? How can I > reduce it? > > Thank you very much. > Cheers. > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=33912#33912 > > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
