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21 lines
484 B
Plaintext
21 lines
484 B
Plaintext
4 years ago
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#ifndef __random_hlsl_
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#define __random_hlsl_
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static const float hashScale1 = 0.1031;
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static const float3 hashScale2 = float3(0.1031, 0.1030, 0.0973);
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float randomFloat(float p)
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{
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float3 p3 = frac(abs(float3(p, p, p)) * hashScale1);
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p3 += dot(p3, p3.yzx + 19.19);
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return frac((p3.x + p3.y) * p3.z);
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}
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float2 randomFloat2(float2 p)
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{
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float3 p3 = frac(abs(p.xyx) * hashScale2);
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p3 += dot(p3, p3.yzx + 19.19);
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return frac((p3.xx + p3.yz) * p3.zy);
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}
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#endif
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