Dweet illustrating how t diverges from … by Agnes

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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Agnes

function u(t) {

T=new Date().getTime()/1e3;for(O=t?O:T,c.width|=i=3,x.scale(10,10);i--;x.fillText(i>1?t:i?M=T-O:f=t?f:0,9,30+30*i));f++;for(j=1e3*~~t;j--;);

Apr 16 2018 8:45 AM UTC

}// 140/140

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Dweet illustrating how t diverges from time reported by getTime() as framerate gets lower. Warning: this dweet intentionally loops for longer and longer, and will probably eventually lock your browser if you have it on screen for 20 minutes.

u/joeytwiddle

T=Date.now()/1e3 to save 10 chars ;-)
u/BuRRak

new Date/1e3 to save 12 bytes actually


      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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