ア on Twitter: "#define v vec3 float f(v p){return max(length(p)-1.,-length(mod(p,.2)-.1)+.1);} void main(){v s,l;for(int i=0;i<15;i++){l+=f(s*mat3(1.,0.,0.,0.,cos(t),-sin(t),0.,sin(t),cos(t)));s=v(0.,0.,2.)+v((gl_FragCoord.xy-r/2.)/3e2,-1.)*l;}gl_FragColor=vec4(length(s/l)/l,1.);} うー-ん。… https://t.co/wlp9BvAfIX"

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#define v vec3 float f(v p){return max(length(p)-1.,-length(mod(p,.2)-.1)+.1);} void main(){v s,l;for(int i=0;i<15;i++){l+=f(s*mat3(1.,0.,0.,0.,cos(t),-sin(t),0.,sin(t),cos(t)));s=v(0.,0.,2.)+v((gl_FragCoord.xy-r/2.)/3e2,-1.)*l;}gl_FragColor=vec4(length(s/l)/l,1.);} うー-ん。pic.twitter.com/3IXx4KMLur