Very cool idea by TGY, playing around w… 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

remix of d/22738 by u/TGY

function u(t) {

t?c.width=2e3:a=[]
c.onclick=e=>(X=e.x-960)&(Y=e.y-540)&a.push([X*Y])
a.map((e,i)=>x.arc(960,540,e[0]*=.9,0,7))
x.fill('evenodd')

May 10 2021 1:47 PM UTC

}// 129/140

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Very cool idea by TGY, playing around with the concept

u/Agnes

You can even optimise this by adding a=a.filter(e=>e>0) if X*Y is replaced by (e.x-960)*(e.y-540), which I guess doesn't matter at all but feels better somehow if someone were to sit around clicking on this millions of times
u/aleamb

#interactive


      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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