Phunky Physics by yonatan

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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yonatan

function u(t) {

t?c.width|=0:U=V=Y=X=.1
d=X*X+Y*Y>1&&(X*U+Y*V)**.7
X+=U-=X*d
Y+=V-=Y*d-.01
x.arc(a=540,a,a,0,9)
x.arc(a+X*a,a+Y*a,40,0,9)
x.fill('evenodd')

Sep 25 2018 1:35 PM UTC

}// 139/140

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Phunky Physics

u/joeytwiddle

Fun! #bounce
u/cantelope

the last paramater of x.arc can be 7, 8, or 9 as a single digit that closes the circle.. i usually go with 7 because it's the closest integer > 2π, but it's interesting that you go with 9 usually :)
u/joeytwiddle

#physics


      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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