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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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  • Updated due to change in Firefox behavior

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xem

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  • Typical #js13k #gamedev experience... don't be afraid to make a big game: after minification, zip, roadroller and ECT, your entry will easily fit in 13,312 bytes

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remix of d/32212 by u/lewdev

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  • ✨ My sparkling halo!

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  • 🏃🗡 It's dangerous to go alone! Take this. (use arrow keys) #interactive

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  • All points moving on straight lines
  • u/shandriy
    Original code: for(i=11,c.width=96;i--;x.fillRect(47+S(t+(o=i*2))*20*C(o),26+S(t+o)*20*S(o),2,2))for(j=300;j--;)x.fillRect(48+S(j+(o=i*2))*60*C(o),27+S(j+o)*60*S(o),.3,.3)

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  • Olympic games logo (v1) ... overlaps are not perfect
  • u/xem
    version with better overlaps but too big: a=(i,j,c,u,v)=>{x.lineWidth=50,x.beginPath(),x.strokeStyle="#"+c,x.arc(i*99,j*99,250,u,v),x.stroke()};for(i in z=["08C","FA3","000","095","E35"])a(i*3+3.5,6-1.2*((-1)**i),z[i],+i?(i%2?4.6:3.2):0,i%2?-1.9:9.3)

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