Harmonic Spin by smtsjhr

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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smtsjhr

function u(t) {

c.width=1920
s=Math.PI*C(.02*t%Math.PI)
x.lineWidth=55
for(i=0;i<1250;i+=50){
x.beginPath()
x.arc(960,540,i,Math.PI+i*s,i*s)
x.stroke()}

Sep 6 2019 5:41 PM UTC

}// 137/140

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Harmonic Spin

u/smtsjhr

takes about 2.5 minutes for the motion to loop (assuming 60 fps). Don't stare too long!


      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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