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lazydodo's avatar
lazydodo
Honored Guest
13 years ago

Shader Optimization.

I was playing with the shader and wondered if it could be optimized. Lets start with the standard Shader float2 HmdWarp(float2 in01) { float2 theta = (in01 - LensCenter) * ScaleIn; // ...
lazydodo's avatar
lazydodo
Honored Guest
13 years ago
I ran the tests on my office box (Geforce 210, low, low end $35 hardware) the speedup wasn't quite as big as on the 670 but still well worth it. Given you run the shader twice, it got the frametime down by almost a full milliseccond.

warpShader : 2.094713
Just Sample : 0.792888
WarpLookup : 1.597678