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Cellular Automata Demo - as in https://www.youtube.com/watch?v=bc-fVdbjAwk
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| (function() { | |
| 'use strict' | |
| const | |
| MEMBERS = 181, | |
| GENERATIONS = 100, | |
| randomState = () => Math.random() > .5, | |
| createCell = () => { | |
| const | |
| cell = document.createElement('div') | |
| cell.className = randomState() ? 'active' : 'inactive' | |
| return cell | |
| }, | |
| createGeneration = members => { | |
| const | |
| row = document.createElement('div') | |
| row.className = 'generation' | |
| for(let i = 0; i < members + 1; i++) { | |
| row.appendChild(createCell()) | |
| } | |
| return row | |
| }, | |
| getNewState = (prev, current, next) => { | |
| const | |
| rulesMap = { | |
| 'active': { | |
| 'active': { | |
| 'active': 'inactive', | |
| 'inactive': 'active' | |
| }, | |
| 'inactive': { | |
| 'active': 'inactive', | |
| 'inactive': 'inactive' | |
| } | |
| }, | |
| 'inactive': { | |
| 'active': { | |
| 'active': 'active', | |
| 'inactive': 'inactive' | |
| }, | |
| 'inactive': { | |
| 'active': 'inactive', | |
| 'inactive': 'active' | |
| } | |
| } | |
| } | |
| return rulesMap[prev.className][current.className][next.className] || 'unknown' | |
| }, | |
| cloneGeneration = parent => { | |
| const | |
| nextGen = parent.cloneNode(true) | |
| nextGen.childNodes.forEach((cell, i) => { | |
| cell.className = getNewState( | |
| parent.childNodes[i - 1] || parent.childNodes[parent.childNodes.length - 1], | |
| parent.childNodes[i], | |
| parent.childNodes[i + 1] || parent.childNodes[0] | |
| ) | |
| }) | |
| return nextGen | |
| } | |
| let | |
| cellGeneration, | |
| timer | |
| timer = window.setInterval(() => { | |
| const | |
| universe = document.querySelector('#universe') | |
| cellGeneration = cellGeneration ? cloneGeneration(cellGeneration) : createGeneration(MEMBERS) | |
| universe.appendChild(cellGeneration) | |
| if(GENERATIONS < universe.childNodes.length) { | |
| universe.removeChild(universe.childNodes[0]) | |
| // window.clearInterval(timer) | |
| } | |
| }, 100) | |
| }()) |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1"> | |
| <title>Cellular Automata Example</title> | |
| <link href="./styles.css" rel="stylesheet"> | |
| </head> | |
| <body> | |
| <div id="universe"></div> | |
| <script src="./automata.js"></script> | |
| </body> | |
| </html> |
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| .generation { | |
| height: 5px; | |
| margin: 0; | |
| } | |
| .generation > div { | |
| background-color: #9cf; | |
| width: 5px; | |
| height: 5px; | |
| margin: 0; | |
| display: inline-block; | |
| } | |
| .generation > .active { | |
| background-color: #000; | |
| } | |
| .generation > .unknown { | |
| background-color: #f00; | |
| } |
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