Created
January 8, 2018 17:11
-
-
Save hugozap/de795baa988e2bee6b9518c3885be1fa to your computer and use it in GitHub Desktop.
voronoi butterfly
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
<!-- Adapted from the voronoi example found here: https://bl.ocks.org/mbostock/4060366 --> | |
<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.links { | |
} | |
.polygons { | |
fill: none; | |
stroke: none; | |
} | |
.polygons :first-child { | |
fill: lightblue; | |
} | |
.sites { | |
fill: #000; | |
stroke: #fff; | |
} | |
.sites :first-child { | |
fill: #fff; | |
} | |
</style> | |
<svg width="960" height="500"></svg> | |
<script src="https://d3js.org/d3.v4.min.js"></script> | |
<script src="https://d3js.org/d3-ease.v1.min.js"></script> | |
<script> | |
var svg = d3.select("svg"), | |
width = +svg.attr("width"), | |
height = +svg.attr("height"), | |
target = [0,0] | |
var sites = d3.range(50) | |
.map(function(d) { return [Math.random() * width, Math.random() * height]; }); | |
var voronoi = d3.voronoi() | |
.extent([[-1, -1], [width + 1, height + 1]]); | |
var polygon = svg.append("g") | |
.attr("class", "polygons") | |
.selectAll("path") | |
.data(voronoi.polygons(sites)) | |
.enter().append("path") | |
.call(redrawPolygon); | |
var link = svg.append("g") | |
.attr("class", "links") | |
.selectAll("line") | |
.data(voronoi.links(sites)) | |
.enter().append("line") | |
.call(redrawLink); | |
function newTarget() { | |
target = [Math.random() * width, Math.random() * height]; | |
} | |
var customElastic = d3.easeElastic.period(0.4); | |
var start = null; | |
function step(timestamp) { | |
var stepSize = 20; | |
var difX = Math.abs(sites[0][0] - target[0]) | |
var difY = Math.abs(sites[0][1] - target[0]) | |
difX > 10 && (sites[0][0] += stepSize * (sites[0][0] < target[0] ? 1 : -1)) | |
difY > 10 && (sites[0][1] += stepSize * (sites[0][1] < target[1] ? 1 : -1)) | |
if (difX < 10 || difY < 10) { | |
newTarget(); | |
} | |
redraw() | |
console.log(sites[0]) | |
window.requestAnimationFrame(step); | |
} | |
window.requestAnimationFrame(step); | |
function redraw() { | |
var diagram = voronoi(sites); | |
polygon = polygon.data(diagram.polygons()).call(redrawPolygon); | |
link = link.data(diagram.links()), link.exit().remove(); | |
link = link.enter().append("line").merge(link).call(redrawLink); | |
} | |
function redrawPolygon(polygon) { | |
polygon | |
.attr("d", function(d) { return d ? "M" + d.join("L") + "Z" : null; }); | |
} | |
function redrawLink(link) { | |
link | |
.attr("x1", function(d) { return d.source[0]; }) | |
.attr("y1", function(d) { return d.source[1]; }) | |
.attr("x2", function(d) { return d.target[0]; }) | |
.attr("y2", function(d) { return d.target[1]; }); | |
} | |
function redrawSite(site) { | |
site | |
.attr("cx", function(d) { return d[0]; }) | |
.attr("cy", function(d) { return d[1]; }); | |
} | |
</script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment