uniform float time;
uniform float seed;
uniform vec2 resolution;
#pragma glslify:noise=require('../../includes/noise/simplex-3d')
#pragma glslify:palette=require('../../includes/palettes/iq-1')
#pragma glslify:grain=require(glsl-film-grain)
const vec2 s=vec2(1,1.7320508);
vec4 getHex(vec2 p)
{
vec4 hC=floor(vec4(p,p-vec2(.5,1))/s.xyxy)+.5;
vec4 h=vec4(p-hC.xy*s,p-(hC.zw+.5)*s);
return dot(h.xy,h.xy)<dot(h.zw,h.zw)
?vec4(h.xy,hC.xy)
:vec4(h.zw,hC.zw+.5);
}
void main(){
vec2 p=gl_FragCoord.xy;
vec2 uv=p/resolution;
uv-=vec2(.5);
uv*=min(vec2(resolution.x/resolution.y,1.),vec2(1.,resolution.y/resolution.x));
uv*=40.;
vec4 hex=getHex(uv);
vec2 id=hex.zw;
vec2 c=hex.xy;
float a=time*.1;
mat2 rot=mat2(cos(a),sin(a),-sin(a),cos(a));
float n=max(0.,noise(vec3(id*.05*rot,time*.1))*.5+.5);
float shift=n*4.+c.x;
vec3 col=palette(max(shift,.1));
col=mix(vec3(0.),col,smoothstep(.4,1.,smoothstep(shift,0.,.4)));
vec4 color=vec4(col,1.);
gl_FragColor=mod(color,11.);
}
