I wanted to make the trail fade away, b… 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

remix of d/19471 by u/IV

function u(t) {

h=560
w=h*4
a=T(t+2)*99
P=T(t)*10+h
x.fillStyle=R(a,a/3,a,.05)
with(x)font="9cm a",fillText(w,P,P),fillStyle=R(h,h,h,3/h),fillRect(0,0,w,w)

Jul 29 2020 10:52 PM UTC

}// 140/140

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I wanted to make the trail fade away, but it only kinda worked, and I didn't have characters left for any relevant text.

u/Xen

had a quick play.... with(x)fillStyle=R(a=T(t+(h=560))*99,a/3,a,.05),font="9cm'",fillText(w=h*4,P=T(t)*9+h,P),fillStyle=R(h,h,h,4/h),fillRect(0,0,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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