15 lines
No EOL
641 B
Text
15 lines
No EOL
641 B
Text
/*
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contributors: Inigo Quiles
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description: inverse quartic polynomial https://iquilezles.org/articles/smoothsteps/
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use: <float|float2|float3|float4> invQuartic(<float|float2|float3|float4> value);
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examples:
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- https://raw.githubusercontent.com/patriciogonzalezvivo/lygia_examples/main/math_functions.frag
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*/
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#ifndef FNC_INVQUARTIC
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#define FNC_INVQUARTIC
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float invQuartic(const float v) { return sqrt(1.0-sqrt(1.0-v)); }
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float2 invQuartic(const float2 v) { return sqrt(1.0-sqrt(1.0-v)); }
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float3 invQuartic(const float3 v) { return sqrt(1.0-sqrt(1.0-v)); }
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float4 invQuartic(const float4 v) { return sqrt(1.0-sqrt(1.0-v)); }
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#endif |