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Conway's Game of Life with US Zip Codes
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<!DOCTYPE html> | |
<html> | |
<head> | |
<meta charset='utf-8' /> | |
<title></title> | |
<meta name='viewport' content='initial-scale=1,maximum-scale=1,user-scalable=no' /> | |
<script src='https://api.tiles.mapbox.com/mapbox-gl-js/v0.42.0/mapbox-gl.js'></script> | |
<link href='https://api.tiles.mapbox.com/mapbox-gl-js/v0.42.0/mapbox-gl.css' rel='stylesheet' /> | |
<style> | |
body { | |
margin: 0; | |
padding: 0; | |
} | |
#map { | |
position: absolute; | |
top: 0; | |
bottom: 0; | |
width: 100%; | |
height: 100%; | |
transform: translateZ(0); | |
} | |
</style> | |
</head> | |
<body> | |
<div id='map' clas='map'></div> | |
<script> | |
let cells = {}; | |
let cellKeys = []; | |
mapboxgl.accessToken = 'pk.[YOUR_MAPBOX_TOKEN]'; | |
const map = new mapboxgl.Map({ | |
container: 'map', | |
style: 'mapbox://styles/[YOUR_MAPBOX_STYLE]?optimize=true', | |
center: [-100, 36], | |
minZoom: 4, | |
zoom: 4 | |
}); | |
const paint = { | |
'fill-color': { | |
default: 'transparent', | |
property: 'ZCTA5CE10', | |
type: 'categorical', | |
stops: [ ['94105', '#ff0000'] ], | |
}, | |
'fill-opacity': 0.7, | |
}; | |
const drawFrame = () => { | |
map.removeLayer('cells'); | |
let newCells = JSON.parse(JSON.stringify(cells)); | |
for (const key of cellKeys) { | |
let sumAliveNeighbors = 0; | |
for (const neighbor of cells[key].adjacent) { | |
if (cells[neighbor].alive) sumAliveNeighbors = sumAliveNeighbors + 1; | |
} | |
if (sumAliveNeighbors < 2) newCells[key].alive = false; | |
if (sumAliveNeighbors === 3 || sumAliveNeighbors === 4) newCells[key].alive = true; | |
if (sumAliveNeighbors >= 5) newCells[key].alive = false; | |
} | |
paint['fill-color'].stops = cellKeys.reduce((acc, key) => { | |
if (newCells[key].alive) { | |
acc.push([key, '#110933']); | |
} | |
return acc; | |
}, []); | |
cells = JSON.parse(JSON.stringify(newCells)); | |
map.addLayer({ | |
id: 'cells', | |
type: 'fill', | |
source: `zip-tiles`, | |
'source-layer': `[us-zipcode-layer]`, | |
'minzoom': 4, | |
paint, | |
}, 'water'); | |
setTimeout(() => { | |
map.setPaintProperty('cells', 'fill-opacity', 0.74); | |
}, 100); | |
}; | |
map.on('load', function() { | |
fetch('./[some_json].json') | |
// json has keys equal to US zip codes | |
// each zip code has keys: adjacent(string of adjacent zips e.g. '[94105, 94107]') | |
.then(resp => resp.json()) | |
.then(j => { | |
console.log('JSON decoded'); | |
cells = j; | |
cellKeys = Object.keys(cells); | |
cellKeys.map(key => cells[key].adjacent = JSON.parse(cells[key].adjacent)); | |
cellKeys.map(key => cells[key].alive = !!parseInt(Math.random() * 3 - 1)); | |
setInterval(drawFrame, 200); | |
}); | |
map.addSource(`zip-tiles`, { | |
type: 'vector', | |
url: 'mapbox://[my-style-with-zipcode-sources]', | |
}); | |
map.addLayer({ | |
id: 'cells', | |
type: 'fill', | |
source: `zip-tiles`, | |
'source-layer': `[source-layer]`, | |
'minzoom': 4, | |
paint, | |
}, 'water'); | |
}); | |
</script> | |
</body> | |
</html> |
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