Bubble universe colour redux by joeytwiddle

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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joeytwiddle

remix of d/33917 by u/rodrigo.siqueira

function u(t) {

for(c.width=800,X=Y=i=2e3;i--;x.fillRect(400+X*99,225+Y*99,4,4))j=i>>7,X=C(a=Y+j)+C(b=X+t/6+j*9),Y=S(a)+S(b),x.fillStyle=`hsl(${i},99%,50%)`

Jun 6 2025 4:17 PM UTC

}// 140/140

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Bubble universe colour redux

u/joeytwiddle

This has fewer start points and slower motion than other bubble universes, so we can see how the galaxies transition
u/joeytwiddle

I golfed it down to 134: for(c.width=X=Y=i=850;i--;x.fillRect(425+X*99,240+Y*99,5,5))j=i>>6,X=C(a=Y+j)+C(b=X+t+j*9),Y=S(a)+S(b),x.fillStyle='hsl(${i},99%,50%)'


      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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