d/20752 by geb | Dwitter

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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geb

remix of d/20747 by u/danny@hille.dk

function u(t) {

for(m=Math,c.width=X=66;X--;)for(Y=44;Y--;x.fillStyle=R(o=S(S(X*Y)+(m.hypot(X-32,Y-21)/13-t)*5)*230,o*.8,-o))x.fillRect(X,Y,1,1)

Nov 21 2020 1:10 PM UTC

}// 128/140

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u/danny@hille.dk

NICE! you could zoom the ripples for a psychodelic wave like this for(c.width=X=64,w=30;X--;)for(Y=38;Y--;x.fillStyle=R(o=S(S(X/9*Y/9)+(Math.hypot(X-32,Y-21)/13-t)*5)*230,o*.8,-o))x.fillRect(X,Y,1,1)
u/danny@hille.dk

or pixelate, for some retro style, and mess with the colors: for(w=30,X=64,w=30;X--;)for(Y=38;Y--;x.fillStyle=R(o=S(S(X/9*Y/9)+(Math.hypot(X-32,Y-21)/13-t)*5)*230,-o,o))x.fillRect(X*w,Y*w,w,w)


      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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