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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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  • Pulsating Torus

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  • u/pavel
    (x*x+y*y+z*z+3)**2>16*(x*x+y*y) is directly from https://en.wikipedia.org/wiki/Torus
  • u/pavel
    with R=2 and r=1
  • u/pavel
    This example shoots rays from (0,0,4). In order to rotate the shape you have to move where the rays come from, the camera!
  • u/tomxor
    Thanks for the explanation 👍

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  • Torus at the Discoteque

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  • flow

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  • Rotating Double Donuts #torus #donut 🍩🍩
  • u/TGY
    I don't think you need "var" there. It works fine without it :)
  • u/New_Core
    nice, and its 5 FPS faster with the "var" then without on my old machine.

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  • u/geb
    for(i=1e4;i--;f(0,c=2,280,i+t,💡&&⭕⭕➜🍩🍩)) f=(w,h,q,d)=>q>99?f(h+q*C(d),w+q*S(d),q/c,T(d*d+t*d)/c): x.fillRect(w+480+950*(i%c),h+510,.4,t<c)
  • u/rodrigo.siqueira
    I posted a cleaner version (remix). I usually avoid obfuscated code, but in this case it was for aesthetic reasons and for fun ("donuts everywhere" style). The 💡&&⭕⭕➜🍩🍩 part was just to illustrate, it has no functionality in the code.
  • u/tomxor
    I think Pavel might be refering to unicode tofu, I get this too... the "⭕⭕➜🍩🍩" bit renders but almost all the other non-ASCII chars are tofu. I think it depends on what browser/OS combo you have.
  • u/tomxor
    ... and which fonts you've bothered installing.

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  • Organic Torus Deformation #torus

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