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Glsl implementation of the PCG algorithm for the generation of random numbers.

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riccardoscalco/glsl-pcg-prng

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glsl-pcg-prng

PCG random number generators ported to an NPM package, so that you can require it from glslify. The code is based (mostly copied) from https://www.shadertoy.com/view/XlGcRh by Mark Jarzynski.

References:

Install

npm install glsl-pcg-prng

Usage

Note that glsl-pcg-prng needs OpenGL ES 3.0 (WebGL 2.0).

#pragma glslify: prng = require(glsl-pcg-prng)

// Create a seed
vec4 seed = vec4(1000., 2000., 3000., 4000.);

// Return one random number, it takes a float or a vec2 as input
float r1 = prng(seed.x);
float r2 = prng(seed.xy);

// Return three random numbers
vec3 r3 = prng(seed.xyz);

// Return four random numbers
vec4 r4 = prng(seed.xyzw);

Demo