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function u(t) {
} //
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u(t) is called 60 times per second. t: Elapsed time in seconds. S: Shorthand for Math.sin. C: Shorthand for Math.cos. T: Shorthand for Math.tan. R: Function that generates rgba-strings, usage ex.: R(255, 255, 255, 0.5) c: A 1920x1080 canvas. x: A 2D context for that canvas.
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remix of d/15202 by u/pavel

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  • pavel: Poor man's ray tracing v2

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remix of d/15194 by u/robbyg

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  • pavel: Poor man's ray tracing

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function u(t) {

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  • pavel: 194 for(c.width|=i=36;i--;x.fillRect(-99,0,198,198))k=(i>>1)-8-t%1,b=C(A=Math.PI*(i-1/4+1/(1+1e4**k))),x.fillStyle=i%2?'#DDD':'#666',x.setTransform(a=S(A),b/2,-b,a/2,960+k*132,540-k*66-198/(1+k**4))
  • aleamb: love it!
  • katkip: Love it too

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  • pavel: The incremental drawing is not parameter aware so at the extremes its too slow / too fast and choppy
  • pavel: I was gonna improve this by using the period of a spirograph but gave up deriving it.
  • pavel: I think the period is the denominator of 1-1/m expressed as an irreducible fraction.

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