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feat: add non-time InterleavedGradientNoise #568

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Sep 28, 2024
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feat: add non-time InterleavedGradientNoise #568

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9 changes: 7 additions & 2 deletions package/Shaders/Common/Random.hlsli
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Original file line number Diff line number Diff line change
Expand Up @@ -134,15 +134,20 @@ uint iqint3(uint2 x)
///////////////////////////////////////////////////////////

// Derived from the interleaved gradient function from Jimenez 2014 http://goo.gl/eomGso
float InterleavedGradientNoise(float2 pxCoord)
{
float3 magic = float3(0.06711056f, 0.00583715f, 52.9829189f);
return frac(magic.z * frac(dot(pxCoord, magic.xy)));
}

float InterleavedGradientNoise(float2 pxCoord, uint frameCount)
{
// Temporal factor
float frameStep = float(frameCount % 16) * 0.0625f;
pxCoord.x += frameStep * 4.7526;
pxCoord.y += frameStep * 3.1914;

float3 magic = float3(0.06711056f, 0.00583715f, 52.9829189f);
return frac(magic.z * frac(dot(pxCoord, magic.xy)));
return InterleavedGradientNoise(pxCoord);
}

// https://extremelearning.com.au/unreasonable-effectiveness-of-quasirandom-sequences/
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