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function u(t) {
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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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  • u/anotherkitten
    stop being so good
  • u/katkip
    i love your beesandbombs dweets
  • u/pavel
    I call fill just once, the black bits are a single connected shape that zig-zags, the messy edges are hidden offscreen.
  • u/pavel
    I use 1/(1+9e9**x) to smooth step but even rows step twice in one cycle which is done by adding (j|t)%2 as offset.
  • u/pavel
    In hindsight ~~x+(x%1)**9 is better for multi-smooth-step animations.

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  • u/pavel
    Golfed 3 loops into one. Lowest bit of i determines half-circle, next 5 bits determine X and the rest determine Y
  • u/pavel
    i&62 = (i>>1)%32*2 = X*2
  • u/jylikangas
    There's a lot of really clever tricks in your dweets. Keep them coming! :)
  • u/katkip
    wow

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function u(t) {

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  • for(i=1200;i--;x.clearRect(z,z,8,8))j=i>>1,x[s='setTransform'](16,0,0,8,X=j%16*128+(j&16?0:64),Y=1132-(i&-32)+C(j**3+t*3)**4*99*S(t)**4),x.fillRect(z=-4,z,8,1e3),x[s](8,4,-8,4,X,Y-32);
  • u/yonatan
    I think there was something like this by #beesandbombs (but with perspective, and maybe triangles?)
  • u/katkip
    nice one\
  • u/twitter
    for(h=i=1200;i--;x.clearRect(z,z,8,8))j=i>>1,x[s='setTransform'](16,0,0,8,X=j%16*128+(j&16?0:64),Y=h-(i&-32)+C(j**3+t*3)*99*S(t)**4),x.fillRect(z=-4,z,8,h),x[s](8,4,-8,4,X,Y-32) - 177

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function u(t) {

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function u(t) {

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function u(t) {

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  • u/rep_movsd
    If you stare a bit, you see white lines completing the circles - an optical illusion
  • u/danny@hille.dk
    save 9 bytes for(i=c.width|=0;i--;x.fillRect(660+(p>>2)*200+130*C(a=.8+(p+p/4&1||-1)*(28.4*d+3*t)),240+p%4*200+130*S(a),d,d))p=i/120|0,d=i%120/9
  • u/danny@hille.dk
    120/9 = 40/3
  • u/danny@hille.dk
    129 bytes -> for(m=120,i=c.width|=0;i--;x.fillRect(660+(p>>2)*200+m*C(a=.8+(p+p/4&1||-1)*(28.4*d+3*t)),240+p%4*200+m*S(a),d,d))d=i%m/9,p=i/m|0

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function u(t) {

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function u(t) {

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function u(t) {

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  • u/joeytwiddle
    with code snippets from yonatan and balint
  • u/joeytwiddle
    164 chars uncompressed: with(x)for(j=22;j--;fillStyle=j%2?R():'#fff',s>0&&fill())for(p=S(q=S(k=4*t-j/6)-k)-q,s=70*j-22.29*p%140,beginPath(i=6);i--;)lineTo(960+s*C(a=i/.955+p/6),540+s*S(a))
  • u/joeytwiddle
    inspired by #beesandbombs
  • u/duoxx
    what a...
  • u/joeytwiddle
    Pavel golfed it to 133 wow! :-D (see the remix)

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  • Orbiters

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