Hi, my osg based application creates several FBOs and lets slave cameras render into them "on demand" (i.e. the slaves are turned on only whenever an update is required().
I now require high speed access to this rendered data with the CPU, ideally without stalling the render pipeline to avoid stutter of the 3D rendering. Some online tutorials like the following state that an asynchronous read back through PBOs would be the fastest way to go. http://www.comp.nus.edu/~ashwinna/docs/FBO_Readback_using_PBO.pdf http://www.mathematik.uni-dortmund.de/~goeddeke/gpgpu/tutorial3.html My question is whether any of this high performance readback (asynchronous copies and DMA transfers) is already supported by the osg framework, or if I have to dive into native OpenGL calls to implement this procedure. The idea is that my GPU does some GLSL shader based physics calculation (radio propagation) and the CPU can then access this data to run some radio protocol simulation on top of that. Christian
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