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@1wheel

1wheel/index.html

Last active Oct 30, 2017
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<!DOCTYPE html>
<meta charset='utf-8'>
<style>
body{
margin: 0px;
}
path{
stroke: black;
fill: none;
}
</style>
<body>
<script src='/1wheel/raw/67b47524ed8ed829d021/d3-3.5.5.js'></script>
<script src='/1wheel/raw/67b47524ed8ed829d021/queue.js'></script>
<script src='/1wheel/raw/67b47524ed8ed829d021/lodash-3.8.0.js'></script>
<script src='/1wheel/raw/1b6758978dc2d52d3a37/d3-jetpack.js'></script>
<script src='/1wheel/raw/1b6758978dc2d52d3a37/d3-starterkit.js'></script>
<script src='voroni-spiral.js'></script>
var width = innerWidth,
height = innerHeight,
overlap = 10,
numPoly = 25
var canvas = d3.select('body').append('canvas')
.attr('width', width)
.attr('height', height)
var ctx = canvas.node().getContext('2d')
var curColor = '#000'
drawPolygons('#000')
function drawPolygons(color){
var vertices = d3.range(numPoly).map(function(d) {
return [Math.random()*width, Math.random()*height] })
var voronoi = d3.geom.voronoi().clipExtent([[0, 0], [width, height]])
var polygons = voronoi(vertices)
var q = queue(overlap)
_.sortBy(polygons, function(d){ return d3.min(d, ƒ(0)) })
.forEach(function(d, i){ q.defer(drawSpiral, d, i, color) })
q.awaitAll(function(){ drawPolygons(color == '#000' ? '#fff' : '#000') })
}
function drawSpiral(polygon, i, color, cb){
var duration = 0
var points = polygon.slice()
var count = 0
setTimeout(drawNext, i < overlap ? i*100 : 0)
function drawNext(){
var curPoint = points.shift()
var nextPoint = points[0]
if (curColor != color) ctx.strokeStyle = curColor = color
ctx.beginPath()
ctx.lineTo(curPoint[0], curPoint[1])
ctx.lineTo(nextPoint[0], nextPoint[1])
ctx.stroke()
var percent = 4/dist(curPoint, nextPoint)
var x = curPoint[0]*(1 - percent) + nextPoint[0]*percent
var y = curPoint[1]*(1 - percent) + nextPoint[1]*percent
if (dist([x, y], nextPoint) > 1) points.push([x, y])
points.length > 2 && count++ < 500 ? setTimeout(drawNext, duration) : cb()
}
}
function dist(a, b){
return Math.sqrt(
Math.pow(a[0] - b[0], 2) +
Math.pow(a[1] - b[1], 2))
}
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