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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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  • Heat Waves 🔥

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remix of d/17533 by u/tomxor

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  • Water Ripples 💧
  • u/aleamb
    #water
  • u/KilledByAPixel
    more golfed... for(w=c.width&=i=10368,R=R-1?1:w;i--;S[i]=S[i]+C[i]/4||0)x.fillRect(i%w,i/w,1,C[i]=T(i*t)>5e4?9:C[i]*.9-(2*S[i]-S[i-R]-S[i+R])/3||0)
  • u/tomxor
    #automata (von-neuman outer-totalistic r=1)
  • u/KilledByAPixel
    another byte saved... for(w=c.width&=i=10368,R=R-1?1:w;i--;S[i]=S[i]+v/4||0)x.fillRect(i%w,i/w,1,v=C[i]=T(i*t)>5e4?9:C[i]*.9-(2*S[i]-S[i-R]-S[i+R])/3||0)
  • u/vain
    cool 2d water drop fx

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  • Rule 102

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  • u/tomxor
    #automata
  • u/rodrigo.siqueira
    Stephen Wolfram (creator of WolframAlpha and Mathematica) describes a deeper theory behind those Cellular Automata in his book A New Kind of Science. I invite you to listen to the interview about Cellular automata and its relation with Artificial General Intelligence - Stephen Wolfram and Lex Fridman (MIT AI teacher): https://www.youtube.com/watch?v=ez773teNFYA

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IV

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  • u/IV
    I think someone did a compressed one already. This one is 193B: t||(C=12,N=90,m=0);for(n=[i=N*N];i--;){u=i%N;v=~~(i/N);for(S=z=9;z--;S-=m[(~(z/3)+2+u)+(z%3-1+v)*N]|0); x.fillStyle=R(s=(n[i]=m?S-5?S==6|0:m[i]:new Date%2)*255,s,s),x.fillRect(u*C,v*C,C,C)};m=n
  • u/IV
    I have a toroidal version of 172B (166 without the wrapping) using a shorter draw, but the compressor doesnt like it: t||(C=12,N=90,m=0);for(n=[i=N*N];i--;){u=i%N;v=-~(i/N);for(S=z=9;z--;S-=m[(~(z/3)+2+u+N)%N+(z%3-2+v+N)%N*N]); x.fillText('⬛⬜'[n[i]=m?S-5?S==6|0:m[i]:new Date%2],u*C,v*C) };m=n
  • u/DaSpider
    #conway #gameOfLife

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  • u/tomxor
    Other sized w must be a power of 2 and i must be at least w**2+r+1 (r=neighbourhood radius) to allow the sliding window to correctly initialise, otherwise a bad sum will propagate throughout the grid usually causing everything to die.
  • u/KilledByAPixel
    👍 Thanks for the explanation!
  • u/tomxor
    hmm the larger than necessary i seems to be introducing artifacts... change to i=w*w+6 if you want to see the pure rule.
  • u/katkip
    Woow! I remember it from the The Powder Toy game

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