Rendering and CPU usage
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Hm... the code I posted earlier (for "manuel" backface culling) halves the CPU usage but the GL_CULL_FACE doesn't seem to make any difference... Any idea why (I haven't added VAs yet or VBOs)?
Correct me if I'm wrong, but the backface culling that was just posted works on the GPU, not on the CPU. Which would explain why you're not seeing any differences in CPU usage. Since culling the triangles happens after you pass them to the driver, you've already gone through the 'bottleneck' of passing them through.
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Quote:Original post by Ezbez
Correct me if I'm wrong, but the backface culling that was just posted works on the GPU, not on the CPU. Which would explain why you're not seeing any differences in CPU usage. Since culling the triangles happens after you pass them to the driver, you've already gone through the 'bottleneck' of passing them through.
Sounds like if I use VBOs then it will make it much better.
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