Created
January 8, 2018 17:19
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butterfly2
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<!-- 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(100) | |
.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> |
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