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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/13852 by u/magna

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  • magna: Uncompressed: c.width|=f=b=>b?'clearRect':'fillRect';s=S(t);Z=950*s**4+50;u=C(t)*Z;x[f(u>0)](0,0,2e3,2e3);x.transform(u,z=s*Z,-z,u,960,540);for(i=18;i--;)x[f(i&1)](i-9,-2,1,4)
  • magna: Golfed down to 157: w=c.width|=f=b=>b>0?'clearRect':'fillRect';s=S(t);Z=950*s**4+50;x[f(u=C(t)*Z)](0,0,w,w);x.transform(u,z=s*Z,-z,u,960,540);for(i=18;i--;)x[f(i&1)](i-9,-2,1,4)

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function u(t) {

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  • rnbw: that's a really clever way to alternate functions!
  • katkip: nice method

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remix of d/13814 by u/Jezza

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remix of d/13601 by u/pavel

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function u(t) {

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  • Load older comments...
  • pavel: Notice how d only takes one argument, and it ignores it.
  • KilledByAPixel: I see what you did there. So many great tricks in this one.
  • pavel: p+=r*=d(p+=r) the inner p+=r increments p and d ends runs with that value, however the outer p+= caches the old value of p so when d resolves the inner p+=r is silently ignored!

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