[ShaderToy] Basic Voronoi

basic_voronoi

/*
 * Voronoi visualization
 * Copy of the first approach by @The_ArtOfCode, shown at https://www.youtube.com/watch?v=l-07BXzNdPw
 * 
 * 27.07.2018
 */
vec2 N22(vec2 p) {
    vec3 a = fract(p.xyx*vec3(123.34,234.34,345.65));
    a += dot(a, a+34.45);
    return fract(vec2(a.x*a.y, a.y * a.z));
    
}
void mainImage( out vec4 fragColor, in vec2 fragCoord )
{
    // Normalized pixel coordinates (from 0 to 1)
    float ar = iResolution.x/iResolution.y;
    vec2 uv = (2. * fragCoord - iResolution.xy)/iResolution.y;
    
    float m = 0.;
    float t = iTime;
    float minDist = 100.;
    
    for(float i=0.; i<50.; i++) {
     vec2 n = N22(vec2(i));   
        vec2 p = sin(n*t);
        p.x *= ar; //aspect ratio
        
        float d = length(uv-p);
        m+= smoothstep(.02, .01,d);
        
        if(d<minDist) {
         minDist = d;   
            
        }
    }

    // Time varying pixel color
    vec3 col = vec3(minDist);

    // Output to screen
    fragColor = vec4(col,1.0);
}