When should a uniform be used in shader programming?

Posted by Phineas on Stack Overflow See other posts from Stack Overflow or by Phineas
Published on 2010-04-12T19:40:01Z Indexed on 2010/04/12 19:43 UTC
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graphics

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glsl

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opengl

In a vertex shader, I calculate a vector using only uniforms. Therefore, the outcome of this calculation is the same for all instantiations of the vertex shader. Should I just do this calculation on the CPU and upload it as a uniform? What if I have ten such calculations? If I upload a lot of uniforms in this way, does CPU-GPU communication ever get so slow that recomputing such values in the vertex shader is actually faster?

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