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patriciogonzalezvivo

RGB - YUB

mat3 yuv2rgb = mat3(1.0, 0.0, 1.28033, 1.0, -0.21482, -0.38059, 1.0, 2.12798, 0.0);
mat3 rgb2yuv = mat3(0.2126, 0.7152, 0.0722, -0.09991, -0.33609, 0.43600, 0.615, -0.5586, -0.05639);

RGB - HSV

patriciogonzalezvivo

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

Generic 1,2,3 Noise

float rand(float n){return fract(sin(n) * 43758.5453123);}

float noise(float p){
	float fl = floor(p);
  float fc = fract(p);

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

brianpursley

#!/usr/bin/env python

#
# This is a Python implementation of the QuickPerm algorithm described by Phillip Paul Fuchs at http://www.quickperm.org 
# that generates all permutations of a list without using recursion.
#

a = ['a', 'b', 'c', 'd']

N = len(a)

mattdesl

const glslify = require('glslify');
const path = require('path');

// This is the original source, we will copy + paste it for our own GLSL
// const vertexShader = THREE.ShaderChunk.meshphysical_vert;
// const fragmentShader = THREE.ShaderChunk.meshphysical_frag;

// Our custom shaders
const fragmentShader = glslify(path.resolve(__dirname, 'standard.frag'));
const vertexShader = glslify(path.resolve(__dirname, 'standard.vert'));

Bleuje

// note : if you're on github gist and want to copy paste this code, you can click on the "Raw" button
// and then do Ctrl A, Ctrl C, Ctrl V
// (code below by Kurt Spencer, slightly modified code to run as Processing tab)
// maybe you should rather use this new (improved) version of the noise instead : https://github.com/KdotJPG/OpenSimplex2

/*
 * OpenSimplex Noise in Java.
 * by Kurt Spencer
 * 
 * v1.1 (October 5, 2014)