// #version 300 es precision highp float; // out vec4 outColor; uniform vec2 resolution; uniform float time; uniform vec2 mouse; uniform sampler2D backbuffer; #define iResolution resolution #define iTime time #define iChannel0 backbuffer const float PI=acos(-1.); const float TAU=2.*PI; #define rep(i,n) for(int i=0;i1000.)break; } vec3 ld=norm(vec3(-1,1,1)); vec3 n=normal(rp); vec3 sro=rp+n*.1; float sl=0.,vi=1.; rep(i,64) { vec3 srp=sro+ld*sl; sl+=d=sdf(srp); vi=min(vi,exp2(4.+4.*hash(srp).x)*d/sl); if(d<1e-3){vi=0.;break;} } float ao=sqrt(sat(sdf(rp+n*.2)/.2)); col=vec3(vi+ao); if(sc.y<.5) { col*=hash(floor(rp*4.+.5)).x<.1?vec3(1,.4,.1):vec3(1); }else{ col*=hash(floor(rp*4.+.5)).x<.1?vec3(.3,.3,.8):vec3(1); } col=sat(col); vec3 sk=vec3(.5,.6,.7)*pow(sat(rd.y+.9),2.); col=mix(sk,col,exp(-l*.04)); uv=fc/res; suv=(uv*2.-1.)*asp; vec2 ruv=suv*8.; vec2 auv=abs(fract(ruv)-.5); col+=hash(ceil(vec3(ruv,alt*16.))).x<.1?float(any(lessThan(auv,vec2(.02)))&&all(lessThan(auv,vec2(.3)))):.0; col+=step(abs(uv.y-.1),.03)*step(abs(uv.x-.5),.5*fract(alt))*step(fract(dot(vec2(1),suv)*20.+10.*alt),.5); col*=smoothstep(.8,.4,length(uv-.5)); col+=hash(vec3(fc,alt))*.05; col.r=smoothstep(.0,1.,col.r); col=mix(col,texture2D(iChannel0,uv).rgb,.5); gl_FragColor = vec4(col,1); }