Cloud hevi1991

## GLSL-Noise.md

      
              1 file
            
          
              0 forks
            
          
                0 comments
              
            
              0 stars
            
          
                hevi1991
                / GLSL-Noise.md
            
            
              Created
              September 13, 2021 03:20
                — forked from patriciogonzalezvivo/GLSL-Noise.md
            
              
                GLSL Noise Algorithms 
              
          
    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);
	return mix(rand(fl), rand(fl + 1.0), fc);
}


## perlin.glsl
//	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
	// Classic Perlin 3D Noise
	// by Stefan Gustavson
	//
	vec4 permute(vec4 x){return mod(((x34.0)+1.0)x, 289.0);}
	vec4 taylorInvSqrt(vec4 r){return 1.79284291400159 - 0.85373472095314 * r;}
	vec3 fade(vec3 t) {return ttt(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