wish i had characers for a black bg by doughno

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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doughno

function u(t) {

p=Math.PI
c.width=1920
L=200*S(t%p)
x.beginPath()
x.arc(960,540,400*S(t/2%(p/2))-L/2,0,2*p,0)
x.lineWidth=L
x.strokeStyle="#90F"
x.stroke()

Apr 18 2020 2:53 PM UTC

}// 139/140

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wish i had characers for a black bg

Show more comments…
u/13thptr

almost kinda golfed it c.width|=p=3.14;with(x)fillRect(0,0,2e3,2e3),beginPath(strokeStyle="#90F"),lineWidth=L=200*S(t%p),arc(960,540,400*S(t%p/2)-L/2,0,7,0),stroke()
u/doughno

well, thanks
u/doughno

c.width|=p=3.14;with(x)fillRect(0,0,2e3,2e3),beginPath(strokeStyle="#90F"),lineWidth=L=200*S(t%p),arc(960,540,400*S(t%p/2)-L/2,0,7),stroke()
u/doughno

i could remove 2 characters from your golf and it still works(?)
u/Xen

120: with(x)lineWidth=L=200*S(t),fillRect(!beginPath(strokeStyle="#90F"),!arc(960,540,400*S(t%3)-L/2,0,7),2e3,2e3),stroke()
u/13thptr

u/doughno : must be blind, I don't see the difference
u/13thptr

u/Xen : nice but it isn't exactly the same
u/doughno

u/13thptr : i just removed the last argument of arc() lmao


      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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