Moiré Waves by KilledByAPixel

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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KilledByAPixel

remix of d/20239 by u/KilledByAPixel

function u(t) {

for(i=c.width|=0;i--;)x.arc(960,540+C(i/40-t*6)*40,i,0,9)
x.stroke()

Oct 4 2021 11:17 PM UTC

}// 68/140

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Moiré Waves

u/sigveseb

Wow, somehow this one looks the same in fullscreen too for me. I was expecting it to have completely different patterns because of the moire effect!
u/theonewhostands

May I ask why you used 'c.width|=0'? to my understanding, it should always return the same value. 1920 | 0 = 1920
u/danny@hille.dk

when you set the with of a canvas, the canvas is reset/cleared, c.width|=0 is 2 char shorter than c.width=1920
u/theonewhostands

Interesting. I understand now. Thank you very much!
u/magna

Whoa!


      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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