d/7697 by Galaxtone

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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Galaxtone

remix of d/7696 by u/Galaxtone

function u(t) {

t||(a=b=0);c.onmousemove=e=>m=e;r=c.width/c.clientWidth;with(x)beginPath(),moveTo(a,b),lineTo(a+=(m.x*r-a)*.2,b+=(m.y*r-b)*.2),stroke();

Apr 16 2018 10:04 PM UTC

}// 136/140

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Show more comments…
u/lionleaf

Global variables can remain defined as you edit if you remove the declaration. So it could be working locally but then break when you post it. Missing a declaration of m :)
u/lionleaf

It's a bug :|
u/lionleaf

Waaaaait, nevermind. It gets initialized when I hover my mouse over the dweet. I was a bit too quick there.
u/Galaxtone

Yah, I do that all the time
u/Galaxtone

Plus I already did that with a and b
u/Galaxtone

I just deleted it and fixed it
u/Galaxtone

So yah:
u/Galaxtone

Ignore the m is undefined error, Just move your mouse inside the dwit to make it go away.
u/sirbo

why do you assign m=e and don't simply use e
u/sirbo

why do you assign m=e and don't simply use e
u/sirbo

why do you assign m=e and don't simply use e
u/sirbo

ops


      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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