An interactive demonstration of d3-voronoi rendered to SVG. Compare to Canvas.
Voronoi Tessellation
<!DOCTYPE html> | |
<meta charset="utf-8"> | |
<style> | |
.links { | |
stroke: #000; | |
stroke-opacity: 0.2; | |
} | |
.polygons { | |
fill: none; | |
stroke: #000; | |
} | |
.polygons :first-child { | |
fill: #f00; | |
} | |
.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> | |
var svg = d3.select("svg").on("touchmove mousemove", moved), | |
width = +svg.attr("width"), | |
height = +svg.attr("height"); | |
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); | |
var site = svg.append("g") | |
.attr("class", "sites") | |
.selectAll("circle") | |
.data(sites) | |
.enter().append("circle") | |
.attr("r", 2.5) | |
.call(redrawSite); | |
function moved() { | |
sites[0] = d3.mouse(this); | |
redraw(); | |
} | |
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); | |
site = site.data(sites).call(redrawSite); | |
} | |
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> |
This comment has been minimized.
This comment has been minimized.
how 2 draw d3.voronoi into google maps |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
This comment has been minimized.
The voronoi() algorithm goes badly wrong if two points are coincident.
eg insert line 40: vertices[2] = vertices[1];