Hiya, I have a scene that contains a large number of relatively simple geometries. As the number of objects displayed increases, the rendering time for the scene goes up sharply. These objects are dynamically added and removed from the scene but the geometry itself is static.
Each geometrical object is an extruded profile. It's first tessellated by osgUtil::Tessellator, and then I extrude the triangulated faces out a certain height. The result is two primitive sets, a GL_TRIANGLE_FAN from the tessellator and a bunch of GL_TRIANGLES that I manually create for the extrusion. I add these both as primitive sets with osg::DrawArrays. I doubt any of these geometries have more than 100 triangles -- most probably have less than a quarter of that. I'd like some advice regarding how I can improve rendering speed in this situation. I think that the two calls to DrawArrays per geometry is part of the problem. It might help if I could merge both parts in the geometry as one set of indexed triangles but I'm not really sure that would make a huge difference. Should I be using DrawArrays or DrawElements? Should I be using VBOs? Preet _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
