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Force Layout - Positive Charge (Attract each other)
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| <html> | |
| <head> | |
| <title>D3 Particle System</title> | |
| <meta charset="UTF-8"> | |
| <meta name="viewport" content="width=device-width, initial-scale=1.0"> | |
| <script type="text/javascript" src="http://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script> | |
| </head> | |
| <body> | |
| <script> | |
| var w = '100%'; | |
| var h = '100%'; | |
| var svg = d3.select("body") | |
| .append("svg") | |
| .attr("id", "chart") | |
| .attr("height", h) | |
| .attr("width", w); | |
| var colorScale = d3.scale.category20(); | |
| var force = d3.layout.force() | |
| .size([w, h]) | |
| .charge(10) | |
| .gravity(0) | |
| .on("tick", tick); | |
| function tick() { | |
| svg.selectAll("circle").attr("cx", function (d) { | |
| return d.x; | |
| }) | |
| .attr("cy", function (d) { | |
| return d.y; | |
| }); | |
| } | |
| var prevNode; | |
| svg.on("mousemove", function () { | |
| node = {x: d3.event.x, y: d3.event.y}; | |
| node.px = prevNode != undefined ? prevNode.x : node.x; | |
| node.py = prevNode != undefined ? prevNode.y : node.y; | |
| prevNode = node; | |
| svg.append("circle") | |
| .data([node]) | |
| .attr("cx", node.x) | |
| .attr("cy", node.y) | |
| .attr("r", 5) | |
| .attr("fill", colorScale(node.x + node.y)) | |
| .transition() | |
| .delay(2000) | |
| .attr("r", 0) | |
| .each("end", function () { | |
| force.nodes().shift(); | |
| }) | |
| .remove(); | |
| force.nodes().push(node); | |
| force.start(); | |
| }) | |
| </script> | |
| </body> | |
| </html> |
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