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{ | |
"nodes": [ | |
{"name": "d3"}, | |
{"name": "d3.svg"}, | |
{"name": "d3.svg.area"}, | |
{"name": "d3.svg.line"}, | |
{"name": "d3.scale"}, | |
{"name": "d3.scale.linear"}, | |
{"name": "d3.scale.ordinal"} | |
], | |
"links": [ | |
{"source": 0, "target": 1}, | |
{"source": 1, "target": 2}, | |
{"source": 1, "target": 3}, | |
{"source": 0, "target": 4}, | |
{"source": 4, "target": 5}, | |
{"source": 4, "target": 6}, | |
{"source": 3, "target": 6} | |
] | |
} |
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<!DOCTYPE html> | |
<html> | |
<head> | |
<title>Force-Directed Layout - Network & Tree</title> | |
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.js?1.29.1"></script> | |
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.geom.js?1.29.1"></script> | |
<script type="text/javascript" src="http://mbostock.github.com/d3/d3.layout.js?1.29.1"></script> | |
<style type="text/css"> | |
circle { | |
stroke-width: 1.5px; | |
} | |
line { | |
stroke: #999; | |
} | |
</style> | |
</head> | |
<body> | |
<script type="text/javascript"> | |
var w = 960, | |
h = 500, | |
r = 6, | |
fill = d3.scale.category20(); | |
var force = d3.layout.force() | |
.charge(-120) | |
.linkDistance(30) | |
.size([w, h]); | |
var svg = d3.select("body").append("svg:svg") | |
.attr("width", w) | |
.attr("height", h); | |
d3.json("graph.json", function(json) { | |
var link = svg.selectAll("line") | |
.data(json.links) | |
.enter().append("svg:line"); | |
var node = svg.selectAll("circle") | |
.data(json.nodes) | |
.enter().append("svg:circle") | |
.attr("r", r - .75) | |
.style("fill", function(d) { return fill(d.group); }) | |
.style("stroke", function(d) { return d3.rgb(fill(d.group)).darker(); }) | |
.call(force.drag); | |
force | |
.nodes(json.nodes) | |
.links(json.links) | |
.on("tick", tick) | |
.start(); | |
function tick(e) { | |
// Push sources up and targets down to form a weak tree. | |
var k = 6 * e.alpha; | |
json.links.forEach(function(d, i) { | |
d.source.y -= k; | |
d.target.y += k; | |
}); | |
node.attr("cx", function(d) { return d.x; }) | |
.attr("cy", function(d) { return d.y; }); | |
link.attr("x1", function(d) { return d.source.x; }) | |
.attr("y1", function(d) { return d.source.y; }) | |
.attr("x2", function(d) { return d.target.x; }) | |
.attr("y2", function(d) { return d.target.y; }); | |
} | |
}); | |
</script> | |
</body> | |
</html> |
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