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Hi Everyone, I’ve been playing around with the osgviewer loading
very large scenes that uses LODs. I’ve noticed that after flying around
the scene, forcing each LOD to load each of its children once, and then
returning to my initial state, my frame rate drops to about 15% of its
original. I’m pretty sure it’s the textures using all of the graphics
card’s memory, because if I traverse the entire scene graph releasing all
objects, the frame rate fixes itself. After looking at the code for LODs and PagedLODs, I can’t
determine when the GL objects for inactive children are released. I’m
sure there is a performance benefit to not immediately releasing them once a
child is disabled, but I don’t see how they are ever being released. Can
someone explain how the LODs manage GPU resources that persist through frames? Thanks, Chase |
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