19 lines
624 B
Text
19 lines
624 B
Text
#include "mod289.msl"
|
|
|
|
/*
|
|
contributors: [Stefan Gustavson, Ian McEwan]
|
|
description: permute
|
|
use: <float|float2|float3|float4> permute(<float|float2|float3|float4> x)
|
|
examples:
|
|
- https://raw.githubusercontent.com/patriciogonzalezvivo/lygia_examples/main/math_functions.frag
|
|
*/
|
|
|
|
#ifndef FNC_PERMUTE
|
|
#define FNC_PERMUTE
|
|
|
|
float permute(const float v) { return mod289(((v * 34.0) + 1.0) * v); }
|
|
float2 permute(const float2 v) { return mod289(((v * 34.0) + 1.0) * v); }
|
|
float3 permute(const float3 v) { return mod289(((v * 34.0) + 1.0) * v); }
|
|
float4 permute(const float4 v) { return mod289(((v * 34.0) + 1.0) * v); }
|
|
|
|
#endif
|