dwitter.net | pavel (6693)

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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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function u(t) {

}//
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  • Pen Pattern

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function u(t) {

}//
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  • Round and round

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function u(t) {

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function u(t) {

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  • Some nice math for the 270 initial radius: The half-height is 540, this must equal r+r/2+r/4+r/8+...=r(1+1/2+1/4+1/8+...). Think about the bit in the brackets in terms of pizzas. You have a whole pizza, plus half a pizza, plus a quarter (half the remaining half), plus an eighth (half the remaining), etc. You have two pizzas! So 540=r*2.

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function u(t) {

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  • u/BackendForth
    Nice! The blinking makes it much more life-like . . . unlife-like?

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function u(t) {

}//
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  • 91
  • u/pavel
    for(i=u=~u*697&475;w=i--/4;)x.fillRect((t||S(i))*2e3-u*T%w,T=640+(i&5?i-u:u-i),t?w:u,t?2:i/u) has the parabola shape but is 92 and a little too symmetric.
  • u/pavel
    Err, I meant for(i=u=~u*81&493;w=i--/4;)x.fillRect((t||S(i))*3e3-u*T%w,T=640+(i&5?i-u:u-i),t?w:u,t?2:i/u)

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remix of d/23980 by u/primo

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  • u/pavel
    Also a pretty generic ray tracing 'engine.' Change f to trace other things.
  • u/pavel
    Style remix, no idea how the code I'm remixing works yet. It does not look to do ray tracing so its clearly better.
  • u/primo
    The original uses z + ∂/∂y z for saturation, which looks about right tilted at or near ~26.5°.
  • u/pavel
    for(c.width&=i=10368;i--;x.fillRect(i&127,i>>7,f(.7),1))f=n=>(z=5-i/3e3-3*n)>S(Math.hypot(i/64%2-1,i/5e3-n)*9-6*t)?f(n+.03):--z*.4 is a better one, no weird view prism.

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remix of d/23829 by u/pavel

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  • Show more comments…
  • u/Xen
    love it!
  • u/magna
    Fun to watch! :)
  • u/tomxor
    @rodrigo I think I have The Dwitter Effect, or "Dwitter Syndrome" :D i'm not even joking
  • u/sigveseb
    Nice idea! As an added bonus, if you leave it running for a while you get a graph of the prng bias for free :)

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remix of d/23821 by u/pavel

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  • Mr Sierpiński, I don't feel so good

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remix of d/19550 by u/tomxor

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