Hi,
I will try to ask few simple question.
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It is possible to get information from the GPU about what has beendrawed on screen
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It is possible to read some part of memory from the GPU
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It is possible for shader to be readable.
PS : i am new in deep learning of 3D, i am used with java3D. So i am try to anderstand what can be done by GPU or not. My goal is to implement picking. So i need to know if i have to organize my object information hierarchy in CPU processing or if i can expect some work from GPU, like ray tracing information test from a shader for example.
Thanks