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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.
Theme challenge of the month: #cavern
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remix of d/11930 by u/pavel

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remix of d/18577 by u/trusktr

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  • Tan plane looking at your mouse
  • u/pavel
    #interactive #mouse
  • u/pavel
    I tried doing this in js but its just too hard to fit!
  • u/pavel
    168 c.width|=onmousemove=e=>T=e;b=.6-T.y/264;e=g=>C(i)*g(1-T.x/264);f=g=>S(i)*g(b)+e(S)*g(b-1.6);for(i=.8;i<6;x.fill(x.lineTo(960+e(C)/z,540-f(C)/z)))i+=1.57,z=(2+f(S))/960
  • u/pavel
    This post looks better with rotation angles divided by 2 but I couldn't figure out how to fit it.

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remix of d/18503 by u/zensaiyuki

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  • u/zensaiyuki
    This is super impressive pavel, I don't know how you did it or how this code works yet, but you stuffed it into 140. wow

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  • u/Xen
    sexy lines
  • u/pavel
    It seems like Safari plays dweets significantly slower until you tap on them... Giving the iframe focus increases the request animation frame rate.
  • u/katkip
    very sexy

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  • Show more comments…
  • 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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function u(t) {

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  • Experimenting with #raytracing. I finally figured out why the cosine trick from d/1112 works.

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