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 osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
