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voronoi.js
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voronoi.js
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var width = 960,
height = 500;
var vertices = d3.range(100).map(function(d) {
return [Math.random() * width, Math.random() * height];
});
var svg = d3.select("#chart")
.append("svg")
.attr("width", width)
.attr("height", height)
.attr("class", "PiYG")
.on("mousemove", update);
svg.selectAll("path")
.data(d3.geom.voronoi(vertices))
.enter().append("path")
.attr("class", function(d, i) { return i ? "q" + (i % 9) + "-9" : null; })
.attr("d", function(d) { return "M" + d.join("L") + "Z"; });
svg.selectAll("circle")
.data(vertices.slice(1))
.enter().append("circle")
.attr("transform", function(d) { return "translate(" + d + ")"; })
.attr("r", 2);
function update() {
vertices[0] = d3.mouse(this);
svg.selectAll("path")
.data(d3.geom.voronoi(vertices)
.map(function(d) { return "M" + d.join("L") + "Z"; }))
.filter(function(d) { return this.getAttribute("d") != d; })
.attr("d", function(d) { return d; });
}