Example of looping with recursion, trai… by joeytwiddle

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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joeytwiddle

remix of d/3634 by u/joeytwiddle

function u(t) {

r=Math.random,w=700,a=w*r()**.6,p=w*r(),x.fillRect(p&7?960+a/2*C(p):960+99*C(p),p&7?980-a-a/6*S(p):90+200*r()+30*S(p),.2,.2),t<9&&u(t+.002)

Apr 12 2018 6:33 AM UTC

}// 139/140

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Example of looping with recursion, trailing off as time goes by

u/joeytwiddle

For the first 9 seconds it calls u() 250 times per frame (on average), after that just once per frame
u/hollo47

Looks like these M.C. Escher lithographies, I love the feel of it!


      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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