StepNoise

code:glsl

float stepNoise(float x, float n) {

n = max(n, 5.);

float i = floor(x);

float s = 0.2;

float u = smoothstep(0.5 - s, 0.5 + s, fract(x));

float res = mix(floor(hash(i) * n), floor(hash(i + 1.) * n), u);

res = res / (n - 1.) - 0.5;

return res;

}

// step(uv.y,stepNoise(uv.x*5+fGlobalTime,30.));

https://scrapbox.io/files/675b2aa28615c43f32c7c398.png

code:glsl

float stepNoise(float x, float n) {

const float factor = 0.3;

float i = floor(x);

float f = x - i;

float u = smoothstep(0.5 - factor, 0.5 + factor, f);

float res = mix(floor(hash(i) * n), floor(hash(i + 1.) * n), u);

res /= (n - 1.) * 0.5;

return res - 1.;

}

//step(uv.y,stepNoise2(uv.x*5+fGlobalTime,30.)*.5)

https://scrapbox.io/files/675b2b8cc89590ad6b3ba5cc.png

Modified version, normalized

code:glsl

vec3 stepNoise(float x,float n,float s){

float i = floor(x);

float u = smoothstep(.5-s,.5+s,fract(x));

vec3 r = mix(floor(hash3d(vec3(i,v2Resolution))*n),floor(hash3d(vec3(i+1,v2Resolution))*n),u);

return (r/(n-1)-.5)*2;

}

// Another minimalized version (used at revision 2025)

vec3 setNoise(float x,float n){

float u = smoothstep(.5-s,.5+s,fract(x));

return mix(hash3d(vec3(floor(x),-1U,1)),hash3d(vec3(floor(x+1),-1U,1)),u);

}