hurrmmm/godot/shaders/noise.gdshaderinc

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2023-11-11 13:08:24 -07:00
/* https://www.shadertoy.com/view/XsX3zB
*
* The MIT License
* Copyright © 2013 Nikita Miropolskiy
*
* ( license has been changed from CCA-NC-SA 3.0 to MIT
*
* but thanks for attributing your source code when deriving from this sample
* with a following link: https://www.shadertoy.com/view/XsX3zB )
*
*/
/* discontinuous pseudorandom uniformly distributed in [-0.5, +0.5]^3 */
vec3 random3(vec3 c) {
float j = 4096.0*sin(dot(c,vec3(17.0, 59.4, 15.0)));
vec3 r;
r.z = fract(512.0*j);
j *= .125;
r.x = fract(512.0*j);
j *= .125;
r.y = fract(512.0*j);
return r-0.5;
}
// https://godotshaders.com/snippet/random-value/
float random2(vec2 uv) {
return fract(sin(dot(uv.xy,
vec2(12.9898,78.233))) * 43758.5453123);
}