d/8023 by prplz

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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prplz

function u(t) {

c.width=-1;Q=40;for(X=W=20;X--;)for(Y=W;Y--;)X&1^Y&1&&x.fillRect(X*W-Q+t*100%Q,Y*W-Q+S(t)*200%Q,W,W)

May 7 2018 1:14 PM UTC

}// 100/140

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u/BuRRak

Nice! Looks quite similar to my dweet, d/7996 :D
u/iverjo

You just taught me that c.width=-1; actually sets the canvas width to 300. Clever!
u/BuRRak

300 is the default size of a canvas so giving a negative number will just reset it to defaults i guess
u/prplz

iverjo: I give credit to u/jylikangas for the -1 width trick
u/prplz

BuRRak: Thanks, same goal different approach :)


      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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