Portals #art by katkip

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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katkip

function u(t) {

t||(a=b=1);for(i=999;i--;)x.fillRect(60+a*220,540+b*190,3,3),a+=S(b-a/99-a*b/9-t),b+=C(a+b/99-t*S(t*a)),x.shadowBlur=49,x.shadowColor='lime'

Jul 18 2020 7:26 PM UTC

}// 140/140

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Portals #art

u/donbright

#slowburn
u/rodrigo.siqueira

I have seen this pattern (circular horizontal lines with a stronger single vertical curved line in the middle) emerge in some recursive functions with a parameter increasing it's value ("-t" in yours). I will post here one that I created with this pattern.


      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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