Spinning sticks by gpolonus

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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gpolonus

function u(t) {

w=960,h=540,c.width/=1,r=100,p=(i,f)=>f(t+i*1.05)*r
for(i=0;i<6;i++){x.moveTo(w,h)
x.lineTo(w+p(i+1,C),h+p(i+1,S))
x.stroke()}

Apr 8 2019 8:18 PM UTC

}// 126/140

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Spinning sticks

u/pavel

I am glad I looked at the code here because I learned the trick of passing in C or S to differentiate X vs Y coordinate. I used to pass an offset angle of pi/2 but this is much shorter. Nice!
u/pavel

For example this shaves off 6 chars from d/12567: for(c.width|=p=300;e=p--**.9%1;x.fillRect(960+r(S)/z,200+99/z,s=9*e/z,s))r=f=>p/(1+e*C(a=t/4+p))*f(a+p)+2*p/(1/e-e)*f(p),z=.5+r(C)/800
u/gpolonus

Thanks! I'm glad my simple windmill could help :)


      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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