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Multi-Foci Force Layout
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| license: gpl-3.0 |
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| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| .node { | |
| stroke-width: 1.5px; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = 960, | |
| height = 500; | |
| var fill = d3.scale.category10(); | |
| var nodes = [], | |
| foci = [{x: 150, y: 150}, {x: 350, y: 250}, {x: 700, y: 400}]; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var force = d3.layout.force() | |
| .nodes(nodes) | |
| .links([]) | |
| .gravity(0) | |
| .size([width, height]) | |
| .on("tick", tick); | |
| var node = svg.selectAll("circle"); | |
| function tick(e) { | |
| var k = .1 * e.alpha; | |
| // Push nodes toward their designated focus. | |
| nodes.forEach(function(o, i) { | |
| o.y += (foci[o.id].y - o.y) * k; | |
| o.x += (foci[o.id].x - o.x) * k; | |
| }); | |
| node | |
| .attr("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }); | |
| } | |
| for (var i = 0; i < 150; i = i + 1) { | |
| nodes.push({id: ~~(Math.random() * foci.length)}); | |
| force.start(); | |
| node = node.data(nodes); | |
| node.enter().append("circle") | |
| .attr("class", "node") | |
| .attr("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }) | |
| .attr("r", 8) | |
| .style("fill", function(d) { return fill(d.id); }) | |
| .style("stroke", function(d) { return d3.rgb(fill(d.id)).darker(2); }) | |
| .call(force.drag); | |
| } | |
| /* setInterval(function(){ | |
| nodes.push({id: ~~(Math.random() * foci.length)}); | |
| force.start(); | |
| node = node.data(nodes); | |
| node.enter().append("circle") | |
| .attr("class", "node") | |
| .attr("cx", function(d) { return d.x; }) | |
| .attr("cy", function(d) { return d.y; }) | |
| .attr("r", 8) | |
| .style("fill", function(d) { return fill(d.id); }) | |
| .style("stroke", function(d) { return d3.rgb(fill(d.id)).darker(2); }) | |
| .call(force.drag); | |
| }, 10); */ | |
| </script> |
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