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
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