Hi Vinoth,
Hi Community,
I am creating buildings using osg::Geometry from shapefile data. I am draping
textures on each side of the building... Its rendering fine, but frame rate it
too low..... Its because it has too many buildings to be rendered.
Is there a way to hide buildings from viewing frustum which are overshadowed by
building in front of the camera ???
This would be occlusion culling. The problem is, that potentially every
building is an occluder, so you might sacrifice more of CPU and GPU to
determine visibility than you gain.
Any suggestions or alternate method to improve frame rate is appreciated...
I hereby attach the screenshot for reference....
But be sure to measure where you actually lose the performance! Send us
a screenshot of the stats, so we can help you into the right direction.
Usually reducing the number of draw calls and state-changes is the right
track. Could you produce a small sample graph so we might inspect it?
Maybe you're structuring your graph to flat and to much time is spent to
determine visibility/draw-calls.
If you're brave and your problem is draw calls you can use instancing
with LoD. See the osggpucull example. Adding multiple textures can be
done by adding a textureArray and passing the index per instance in a
vertex attribute.
Cheers
Sebastian
Thank you!
Cheers,
Vinoth R
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=70312#70312
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