uniform float time;
uniform float seed;
uniform vec2 resolution;
#pragma glslify:opRotate=require('../../includes/ops/rotate')
vec3 palette(float t){
vec3 a=vec3(0.17,0.37,0.66);
vec3 b=vec3(0.99,0.42,0.2);
vec3 c=vec3(0.69,0.76,0.89);
vec3 d=vec3(0.47,0.52,0.68);
return a+b*cos(6.28318*(c*t+d));
}
const float TILE = 25.;
const float AA = 0.033;
void main(){
vec2 uv=gl_FragCoord.xy/resolution.xy;
vec2 uv0=uv;
uv-=vec2(0.5);
vec2 aspect = max(vec2(resolution.x/resolution.y,1.),vec2(1.,resolution.y/resolution.x));
uv*=aspect;
float t = time * 0.3f + seed;
uv += 1./TILE/2.;
vec2 id = floor(uv*TILE);
uv = fract(uv*TILE);
vec3 col = palette(0.+uv0.y*0.4)*0.25;
vec2 max = vec2(round(TILE/2.-2.)*aspect);
if (id.x < max.x && id.y < max.y && id.x > -max.x && id.y > -max.y) {
vec2 rUv = opRotate(uv, ((id.x)*2.*sin(t-abs(length(id))*0.05)+id.y*2.*cos(t)) * 0.2, 0.5);
vec3 h = mix(vec3(0.), vec3(1.), smoothstep(0.5-AA, 0.5+AA, rUv.x));
col = mix(h, col, smoothstep(0.4-AA/2., 0.4+AA/2., length(uv - vec2(0.5))));
col = mix(palette(1.-abs(id.y*0.01)), col, smoothstep(0.3-AA/2., 0.3+AA/2., length(uv - vec2(0.5))));
}
gl_FragColor=vec4(col,1.);
}
