added transparency, `hsl` trick doesn't… by pythech

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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pythech

remix of d/8575 by u/New_Core

function u(t) {

with(x)for(b=c.width|=i=40;i--;fill())ellipse(i*199%b+99*S(a=t+i),1200-a*i*20%1300,77,99,0,!beginPath(fillStyle=`hsl(${i*i},99%,50%,.9)`),9)

Jun 13 2018 1:26 AM UTC

}// 140/140

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added transparency, hsl trick doesn't work on Safari it seems

u/joeytwiddle

Instead of hsl(...) you can use hsla(... which will work in Safari
u/pythech

yeah but then you'll exceed the character limit, oh well
u/pythech

the other browsers silently accept the 4th parameter when they should not. That's a bit trickery for me, or at least that's what I meant. I could phrase it a better it seems, thanks for helping anyway, my bad :D


      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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