#つぶやきGLSL vec3 i,a,b,p=vec3(t/.1,rotate2D(t)),d=normalize(r.xxy-vec3(0,ivec2(FC*.5+.5)*4));for(;i.x++<9e2&&snoise3D(a=ceil(p+d*step(a,b))/28.)<1.-length(a.zy);)a=sign(d),b+=step(b=fract(-p*a),-b),a*=b/d,b=min(a,min(a.yzx,a.zxy)),p+=d*b;o.rgb=fwidth(p+p);