13 lines
No EOL
554 B
HLSL
13 lines
No EOL
554 B
HLSL
/*
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contributors: Inigo Quiles
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description: inverse cubic polynomial https://iquilezles.org/articles/smoothsteps/
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use: <float|float2|float3|float4> invCubic(<float|float2|float3|float4> value);
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*/
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#ifndef FNC_INVCUBIC
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#define FNC_INVCUBIC
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float invCubic(const in float v) { return 0.5-sin(asin(1.0-2.0*v)/3.0); }
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float2 invCubic(const in float2 v) { return 0.5-sin(asin(1.0-2.0*v)/3.0); }
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float3 invCubic(const in float3 v) { return 0.5-sin(asin(1.0-2.0*v)/3.0); }
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float4 invCubic(const in float4 v) { return 0.5-sin(asin(1.0-2.0*v)/3.0); }
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#endif |