| uniform half u_time; | |
| uniform half u_w; | |
| uniform half u_h; | |
| half4 main(vec2 fragcoord) { | |
| vec3 c; | |
| float l; | |
| float z=u_time; | |
| for(int i=0;i<3;i++) { | |
| vec2 p=fragcoord.xy/vec2(u_w,u_h); | |
| vec2 uv=p; | |
| p-=.5; | |
| p.x*=u_w/u_h; | |
| z+=.07; | |
| l=length(p); | |
| uv+=p/l*(sin(z)+1.)*abs(sin(l*9.-z*2.)); | |
| c[i]=.01/length(abs(mod(uv,1.)-.5)); | |
| } | |
| return half4(c/l,u_time); | |
| } |