| // | |
| // GLSL textureless classic 3D noise "cnoise", | |
| // with an RSL-style periodic variant "pnoise". | |
| // Author: Stefan Gustavson (stefan.gustavson@liu.se) | |
| // Version: 2011-10-11 | |
| // | |
| // Many thanks to Ian McEwan of Ashima Arts for the | |
| // ideas for permutation and gradient selection. | |
| // | |
| // Copyright (c) 2011 Stefan Gustavson. All rights reserved. |
| // Classic Perlin 3D Noise | |
| // by Stefan Gustavson | |
| // | |
| vec4 permute(vec4 x){return mod(((x*34.0)+1.0)*x, 289.0);} | |
| vec4 taylorInvSqrt(vec4 r){return 1.79284291400159 - 0.85373472095314 * r;} | |
| vec3 fade(vec3 t) {return t*t*t*(t*(t*6.0-15.0)+10.0);} | |
| float cnoise(vec3 P){ | |
| vec3 Pi0 = floor(P); // Integer part for indexing | |
| vec3 Pi1 = Pi0 + vec3(1.0); // Integer part + 1 |
| vec2 rotate(vec2 v, float a) { | |
| float s = sin(a); | |
| float c = cos(a); | |
| mat2 m = mat2(c, s, -s, c); | |
| return m * v; | |
| } |
Please consider using http://lygia.xyz instead of copy/pasting this functions. It expand suport for voronoi, voronoise, fbm, noise, worley, noise, derivatives and much more, through simple file dependencies. Take a look to https://github.com/patriciogonzalezvivo/lygia/tree/main/generative
float rand(float n){return fract(sin(n) * 43758.5453123);}
float noise(float p){
float fl = floor(p);
float fc = fract(p);
| /* | |
| * This work is free. You can redistribute it and/or modify it under the | |
| * terms of the Do What The Fuck You Want To Public License, Version 2, | |
| * as published by Sam Hocevar. See the COPYING file for more details. | |
| */ | |
| /* | |
| * Easing Functions - inspired from http://gizma.com/easing/ | |
| * only considering the t value for the range [0, 1] => [0, 1] | |
| */ | |
| EasingFunctions = { |