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menduz/sphere-normals.hlsl

Created May 30, 2020 13:15
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Spherical normal encoding
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sphere-normals.hlsl
// Encoding:
normalOut=normalize(normalIn.xy)*sqrt(normalIn.z*0.5+0.5);
// Decoding:
normal.z=length2(normalOut.xy)*2- 1;
normal.xy=normalize(normalOut.xy)*sqrt(1- normal.z*normal.z);
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