Hi Guy, It sounds like your setup is falling back to software rendering for some reason. The 7950 should be able to handle it just fine so there must be something in the driver or something in your setup. I'm afraid I can't really provide must guidance on what it might be, try other drivers, different pixel formats etc.
Robert. On Sat, Mar 13, 2010 at 1:38 AM, Guy Volckaert <[email protected]> wrote: > Hi, > > I am experiencing VERY bad performance (i.e 1 FPS) when I enable > precipitation on my Dell laptop (XPS 1710) that uses a GeForce 7950 graphic > card (dell driver version 179.xx). > > But here's the kicker... the performance is fine when running on any other > desktop systems that has a more recent graphic card (for example a 8800 GTX). > I kinda understand that it would run faster, but never expecte a drop to 1 > FPS on a 7950, especially when there is ABSOLUTELY nothing in the scene. > > I've reduced my application to the bare minimum to isolate the problem. All I > have in my scene graph is a pre- post- camera used to render my scene to a > texture (using the render-target-implememtation functions of the > osg::camera), and an instance of precipitation effect. > > I tried using different render-target-implementation technique (like > FRAME_BUFFER) but that did not change anything. > > If I bypass the render-target-implementation (i.e I bypass the > osg::camera::attach() method), keep the pre-camera, and remove the > post-camera, then everything work fine (running at 60fps). > > Can someone shed some light on why the the render-target-implementation would > affect osg::PrecipitationEffect (or vice-versa). > > Note: The problem is not the precipitation effect because I compared my > implementation with the osg precipitation example and they are the same. When > I run the example the frame rate is 60fps (which is the same as my app when I > bypass the rendet to target). > > Cheers, > Guy > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=25603#25603 > > > > > > _______________________________________________ > 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
