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yorung/convert_tangent_space_to_world.hlsl

Created October 9, 2017 10:28
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Convert tangent space normal to world space normal
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convert_tangent_space_to_world.hlsl
float3 gerstnerWaveN = CalcGerstnerWaveNormal(vertexPosition + ofsByGerstnerWave);
float3 gerstnerWaveB = CalcGerstnerWaveBinormal(vertexPosition + ofsByGerstnerWave);
float3 gerstnerWaveT = CalcGerstnerWaveTangent(vertexPosition + ofsByGerstnerWave);
float3x3 rotator;
rotator[0] = gerstnerWaveB;
rotator[1] = gerstnerWaveN;
rotator[2] = gerstnerWaveT;
output.normal = mul(water_normal.xyz, rotator);
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