HiMike, First of all you should analyze the bottleneck in your application, osgViewer::StatsHandler will give you the time spent in each traversal. >From the problem you are facing it seems you are draw limited(rendering a lot number of triangles). One option will be to create LOD(level of detail) node for each sphere, in that case the amount of geometry rendered will be less and hence you will have high performance :) best regards RJ
Mike Greene wrote: > I have an OSG application where I am using osg::Shapedrawable(new > osg::Sphere(...)) to represent errors ellipsoids (all have various > sizes and locations) for targets on a terrain. Prior to their > introduction into the scene, I am getting around 40 frames per second. > After introducing 1000 of them, my frame rate goes down to 4-5 frames > per second. I am using osg::Optimizer on my root node. Exactly how > many polygons are drawn by default for osg::Sphere? Is there a way to > reduce this? Is there a better way to draw thousands of these (noting > that I have to apply a Position/Attitude/Size transform to each one)? > I am using a Nvidia Quadro FX 570 in an Intel 3.0Ghz Duo Core > processor runing Windows XP Pro. > > My viewer is set up in an overhead view, so I see them all every frame > (i.e., I don't think culling will help here). And also, their PATs > have to occassionally be updated (i.e., not static size, orientation, > position). > > Mike Greene > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
