Golfing /u/BuRRak π calculation using N… by AnnanFay

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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AnnanFay

remix of d/7047 by u/BuRRak

function u(t) {

throw p+=(f%4*4-4)/(f++*f++*f)};{p=3,f=2

Feb 25 2018 7:01 AM UTC

}// 40/140

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Golfing u/BuRRak π calculation using Nilakantha's series

u/AnnanFay

Alternatives are: 33 chars using Wallis product but *very* long time to converge. 24 chars using Newton-Raphson if sin & cos allowed.
u/BuRRak

Mind = blown
u/iverjo

#pi


      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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