18 lines
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918 B
Text
18 lines
No EOL
918 B
Text
/*
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contributors: Patricio Gonzalez Vivo
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description: gaussian coeficient
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use: <float4|float3|float2|float> gaussian(<float> sigma, <float4|float3|float2|float> d)
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examples:
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- https://raw.githubusercontent.com/patriciogonzalezvivo/lygia_examples/main/math_gaussian.frag
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license:
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- Copyright (c) 2021 Patricio Gonzalez Vivo under Prosperity License - https://prosperitylicense.com/versions/3.0.0
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- Copyright (c) 2021 Patricio Gonzalez Vivo under Patron License - https://lygia.xyz/license
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*/
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#ifndef FNC_GAUSSIAN
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#define FNC_GAUSSIAN
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float gaussian(float d, float s) { return exp(-(d*d) / (2.0 * s*s)); }
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float gaussian( float2 d, float s) { return exp(-( d.x*d.x + d.y*d.y) / (2.0 * s*s)); }
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float gaussian( float3 d, float s) { return exp(-( d.x*d.x + d.y*d.y + d.z*d.z ) / (2.0 * s*s)); }
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float gaussian( float4 d, float s) { return exp(-( d.x*d.x + d.y*d.y + d.z*d.z + d.w*d.w ) / (2.0 * s*s)); }
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#endif |