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<!DOCTYPE html> |
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<meta charset="utf-8"> |
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<style> |
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.node { |
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stroke: #fff; |
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stroke-width: 1.5px; |
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} |
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.link { |
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stroke: #999; |
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stroke-opacity: .6; |
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} |
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</style> |
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<body> |
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<br> |
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<h2>Click a node to find the geodesic distances</h2> |
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<script src="http://d3js.org/d3.v3.min.js"></script> |
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<script src="dijkstra.js"></script> |
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<script> |
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var width = 960, |
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height = 500; |
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var color = d3.scale.category20(); |
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var force = d3.layout.force() |
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.charge(-120) |
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.linkDistance(30) |
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.size([width, height]); |
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var svg = d3.select("body").append("svg") |
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.attr("width", width) |
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.attr("height", height); |
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d3.csv("mat.csv", function(error, data) { |
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var nodes = [], nodesByName = {}, links = []; |
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function addNodeByName(fullname) { |
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var name = fullname.split(',')[0]; |
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if (!nodesByName[name]) { |
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var node = {"name":name, "links":[]} |
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nodesByName[name] = node; |
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nodes.push(node); |
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return node; |
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} |
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else |
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return nodesByName[name]; |
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} |
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data.forEach(function(d) { |
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for (k in d) { |
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if (d.hasOwnProperty(k) && k != "Cities1" && d[k] > 0) { |
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links.push({"source": addNodeByName(d["Cities1"]), "target": addNodeByName(k), "value": parseInt(d[k])}) |
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} |
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} |
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}); |
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force |
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.nodes(nodes) |
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.links(links) |
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.start(); |
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var link = svg.selectAll(".link") |
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.data(links) |
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.enter().append("line") |
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.attr("class", "link") |
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.style("stroke-width", 1); |
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var node = svg.selectAll(".node") |
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.data(nodes) |
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.enter().append("circle") |
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.attr("class", "node") |
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.attr("r", 5) |
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.style("fill", "grey") |
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.call(force.drag); |
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link.each(function(d) { |
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d.source.links.push(d); |
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d.selection = d3.select(this); |
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}); |
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node.each(function(d) { |
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d.selection = d3.select(this); |
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}); |
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node.append("title") |
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.text(function(d) { return d.name; }); |
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link.append("title") |
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.text(function(d) { return d.source.name + " → " + d.target.name + "\n" + d.value + " mi" }); |
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force.on("tick", function() { |
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link.attr("x1", function(d) { return d.source.x; }) |
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.attr("y1", function(d) { return d.source.y; }) |
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.attr("x2", function(d) { return d.target.x; }) |
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.attr("y2", function(d) { return d.target.y; }); |
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node.attr("cx", function(d) { return d.x; }) |
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.attr("cy", function(d) { return d.y; }); |
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}); |
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node.on("mouseover", function(d) { |
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d3.select(this) |
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.attr("r", 10) |
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d.links.forEach(function(l) { |
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l.selection |
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.style("stroke-width", 10) |
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l.target.selection |
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.attr("r", 7); |
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}); |
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}); |
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node.on("mouseout", function(d) { |
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node.attr("r", 5) |
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link.style("stroke-width", 1); |
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}); |
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link.on("mouseover", function() { |
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d3.select(this) |
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.style("stroke-width", 10); |
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}); |
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link.on("mouseout", function() { |
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d3.select(this) |
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.style("stroke-width", 1); |
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}); |
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var dijkstra = d3.dijkstra() |
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.nodes(nodes) |
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.edges(links); |
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var color = d3.scale.linear() |
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.domain([1, 3, 5]) |
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.range(["green", "yellow", "red"]); |
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dijkstra.on("tick", function() { |
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node.style("fill", function(d) { return color(d.distance); }); |
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}); |
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dijkstra.on("end", function() { |
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var name = dijkstra.source().name; |
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node.select("title") |
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.text(function(d) { return d.name + "\n(" + d.distance + " geodesic distance from " + name + ")" }); |
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}); |
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node.on("click", dijkstra.start); |
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}); |
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</script> |
