Last active
October 30, 2017 21:12
-
-
Save 1wheel/c7122eee6247b95dba09 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!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> |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| 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)) | |
| } |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment