Serves as a basis for other force layout examples.
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August 29, 2015 13:57
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Basic Force Layout
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .link { | |
| stroke: black; | |
| stroke-width: 2px; | |
| } | |
| .node { | |
| fill: steelblue; | |
| stroke: white; | |
| stroke-width: 2px; | |
| } | |
| </style> | |
| <body> | |
| <script src="http://d3js.org/d3.v3.min.js" charset="utf-8"></script> | |
| <script> | |
| var width = 960, | |
| height = 500, | |
| nodes = [{},{},{}], | |
| links = [{source: 0, target: 1}, {source: 1, target: 2}, {source: 2, target: 0}]; | |
| var force = d3.layout.force() | |
| .size([width, height]) | |
| .nodes(nodes) | |
| .links(links) | |
| .linkDistance(150) | |
| .on("tick", tick) | |
| .start(); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svgLinks = svg.selectAll(".link").data(links) | |
| .enter().append("line") | |
| .attr("class", "link"); | |
| svgNodes = svg.selectAll(".node").data(nodes) | |
| .enter().append("circle") | |
| .attr("class", "node") | |
| .attr("r", 8) | |
| .call(force.drag); | |
| function tick() { | |
| svgNodes | |
| .attr("cx", function(d) { return d.x }) | |
| .attr("cy", function(d) { return d.y }); | |
| svgLinks | |
| .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> |
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