Description.
From D3 in Depth book by Peter Cook.
Last active
May 13, 2020 00:07
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Force layout (x foci)
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| license: gpl-3.0 | |
| height: 400 | |
| border: no |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| <!-- <!DOCTYPE html> --> | |
| <meta charset="utf-8"> | |
| <head> | |
| <title>Force layout (foci)</title> | |
| </head> | |
| <style> | |
| </style> | |
| <body> | |
| <div id="content"> | |
| <svg width="700" height="400"> | |
| <g transform="translate(50, 200)"></g> | |
| </svg> | |
| </div> | |
| <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/4.2.2/d3.min.js"></script> | |
| <script> | |
| var width = 600, height = 400; | |
| var colorScale = ['orange', 'lightblue', '#B19CD9']; | |
| var xCenter = [100, 300, 500] | |
| var numNodes = 100; | |
| var nodes = d3.range(numNodes).map(function(d, i) { | |
| return { | |
| radius: Math.random() * 25, | |
| category: i % 3 | |
| } | |
| }); | |
| var simulation = d3.forceSimulation(nodes) | |
| .force('charge', d3.forceManyBody().strength(5)) | |
| .force('x', d3.forceX().x(function(d) { | |
| return xCenter[d.category]; | |
| })) | |
| .force('collision', d3.forceCollide().radius(function(d) { | |
| return d.radius; | |
| })) | |
| .on('tick', ticked); | |
| function ticked() { | |
| var u = d3.select('svg g') | |
| .selectAll('circle') | |
| .data(nodes); | |
| u.enter() | |
| .append('circle') | |
| .attr('r', function(d) { | |
| return d.radius; | |
| }) | |
| .style('fill', function(d) { | |
| return colorScale[d.category]; | |
| }) | |
| .merge(u) | |
| .attr('cx', function(d) { | |
| return d.x; | |
| }) | |
| .attr('cy', function(d) { | |
| return d.y; | |
| }) | |
| u.exit().remove(); | |
| } | |
| </script> | |
| </body> | |
| </html> |
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