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yorung/calculate_gerstner_wave_normals.hlsl

Created October 9, 2017 09:39
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Calculate gerstner wave normals
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calculate_gerstner_wave_normals.hlsl
float3 ofsByGerstnerWave = CalcGerstnerWaveOffset(vertexPosition);
float3 dx = float3(0.01, 0, 0) + CalcGerstnerWaveOffset(vertexPosition + float3(0.01, 0, 0));
float3 dz = float3(0, 0, 0.01) + CalcGerstnerWaveOffset(vertexPosition + float3(0, 0, 0.01));
float3 N = normalize(cross(dz - ofsByGerstnerWave, dx - ofsByGerstnerWave));
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