15 lines
No EOL
641 B
GLSL
15 lines
No EOL
641 B
GLSL
/*
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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|vec2|vec3|vec4> invCubic(<float|vec2|vec3|vec4> 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_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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vec2 invCubic(const in vec2 v) { return 0.5-sin(asin(1.0-2.0*v)/3.0); }
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vec3 invCubic(const in vec3 v) { return 0.5-sin(asin(1.0-2.0*v)/3.0); }
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vec4 invCubic(const in vec4 v) { return 0.5-sin(asin(1.0-2.0*v)/3.0); }
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#endif |