ｗｅａｖｅ by wgetch

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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wgetch

function u(t) {

x.globalAlpha=.1
for(r=j=i=2e3;i--;x.fillStyle=R(r=(1+S(i/j+t*j*C(t*9)))*(b=128),C(r*S(t))*b,b-r))x.fillRect(i%20+t*j%j,i+S(t*r)*10-40,40,8)

Feb 7 2021 6:07 AM UTC

}// 140/140

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ｗｅａｖｅ

u/DataMeta

save 13bytes by with
u/DataMeta

oops, wet phone screen posted early. so you can add .1 as the fourth channel instead of using globalAlpha: R(r=(1+S(i/j+t*j*C(t*9)))*(b=128),C(r*S(t))*b,b-r,.1)
u/Xen

nice!
u/tomxor

So good! I can almost feel the texture
u/DataMeta

yeah! reminds me of the soft upholstery on coach buses


      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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