Visualization of Collatz sequences: htt… by hamptonio

function u(t) {

c.width=1920 // clear the canvas
for(i=0;i<9;i++)
x.fillRect(400+i*100+S(t)*300,400,50,200) // draw 50x200 rects

} // 122/140

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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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hamptonio

function u(t) {

w=c.width=128;for(i=2;i<w*w;i++){s=i;for(k=0;s>1;k++){s=s%2?3*s+1:s/2};x.fillStyle=`hsl(${k*.9},80%,${k/3}%)`;x.fillRect(i%w,i/w|0,1,1);}

Mar 1 2017 9:38 PM UTC

}// 137/140

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Visualization of Collatz sequences: https://en.wikipedia.org/wiki/Collatz_conjec…

u/taupelink

#collatz
u/taupelink

Dwitter engine may have been updated since this dweet was posted...you can add "if(!t)" at the beginning although that bumps it up past 140 characters...
u/taupelink

#collatz


      u(t) is called 60 times per second.
      t: elapsed time in seconds.
      c: A 1920x1080 canvas.
      x: A 2D context for that canvas.
      S: Math.sin
      C: Math.cos
      T: Math.tan
      R: Generates rgba-strings, ex.: R(255, 255, 255, 0.5)

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