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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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remix of d/1053 by u/paberr

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  • Simple terrain generation using midpoint displacement
  • u/iverjo
    Nice alternative to perlin noise!
  • u/sigveseb
    Very nice! And with the horizontal flat line we can pretend that is the sea level; everything above is a mountain and everything below is the sea :)
  • u/iverjo
    #random

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  • Splits 1920px×1056px canvas into 20×11 grid of 96px×96px tiles. Once every 9 frames fills a random tile black or white. Every frame picks a random 2×2 group of tiles and draws it onto a random 1×1 tile at ½ the size.

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  • Noisy default

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  • Random weave
  • u/Joachim
    #pattern #random
  • u/pavel
    Very nice.
  • u/pavel
    117 and instant draw t||x[f='fillRect'](0,0,i=2e3,i);for(x.fillStyle='#9D0';i;x[f](i%64*36+D,(i>>6)*36-D,32-2*D,32+2*D))D=C(--i**9)>0?2:-2
  • u/Joachim
    u/pavel I don't know why but changing this (i>>6)*36-D,35-D,35+D makes a biased maze
  • u/pavel
    I think thats the trick to the original dweet. It's a golfed maze with a visual filter.

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remix of d/286 by u/iverjo

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  • u/sigveseb
    almost looks like a map!
  • u/joeytwiddle
    Whoa! When I was younger I used to have nightmares about this damn thing. I would clean it all away but then it would come creeping back. Weird that you found it in 2016!
  • u/iverjo
    #random

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  • Random number distribution

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  • #golfed added colors instead
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  • u/pavel
    134 for(r=Math.random,w=i=2e3;i--;x.fillRect(p[0]+=4-8*r(),p[1]+=4-8*r(),2,2))p=u[i]=u[i]||[a=w*r(),b=w*r(),R(0,a/8,b/4)],x.fillStyle=p[2]
  • u/pavel
    This does look great :), not sure what else to add with the spare chars
  • u/qm3ster
    Nice! I limited it to 100 particles, each gets 20 movements per frame now:
  • u/qm3ster
    for(r=Math.random,w=i=2e3;i--;x.fillRect(p[0]+=2-4*r(),p[1]+=2-4*r(),2,2))p=u[z=i%100]=u[z]||[a=w*r(),b=w*r(),R(0,a/8,b/4)],x.fillStyle=p[2]

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