This example shows how to define a force to avoid collision between circles of different radii in d3 v4 force layout.
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August 8, 2017 12:15
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Collision
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| svg = d3.select 'svg' | |
| width = svg.node().getBoundingClientRect().width | |
| height = svg.node().getBoundingClientRect().height | |
| MIN_PADDING = 3 | |
| data = [ | |
| {r: 5} | |
| {r: 10} | |
| {r: 20} | |
| {r: 30} | |
| {r: 30} | |
| {r: 10} | |
| {r: 20} | |
| {r: 30} | |
| {r: 30} | |
| {r: 10} | |
| {r: 20} | |
| {r: 30} | |
| {r: 30} | |
| {r: 50} | |
| ] | |
| # Layout | |
| simulation = d3.forceSimulation() | |
| .force('center', d3.forceCenter(width/2, height/2)) | |
| .force 'collision', d3.forceCollide (d) -> d.r + MIN_PADDING | |
| nodes = svg.selectAll '.node' | |
| .data data | |
| en_nodes = nodes.enter().append 'circle' | |
| .attrs | |
| class: 'node' | |
| r: (d) -> d.r | |
| # Simulation | |
| simulation | |
| .nodes(data) | |
| .on 'tick', () -> | |
| en_nodes.attrs | |
| transform: (d) -> "translate(#{d.x}, #{d.y})" |
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| body, html { | |
| padding: 0; | |
| margin: 0; | |
| height: 100%; | |
| } | |
| svg { | |
| width: 100%; | |
| height: 100%; | |
| background: white; | |
| } | |
| .node { | |
| fill: teal; | |
| } |
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <meta charset="utf-8"> | |
| <title>Collision</title> | |
| <link type="text/css" href="index.css" rel="stylesheet"/> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/d3-selection-multi.v0.4.min.js"></script> | |
| </head> | |
| <body> | |
| <svg></svg> | |
| <script src="index.js"></script> | |
| </body> | |
| </html> |
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| // Generated by CoffeeScript 1.10.0 | |
| (function() { | |
| var MIN_PADDING, data, en_nodes, height, nodes, simulation, svg, width; | |
| svg = d3.select('svg'); | |
| width = svg.node().getBoundingClientRect().width; | |
| height = svg.node().getBoundingClientRect().height; | |
| MIN_PADDING = 3; | |
| data = [ | |
| { | |
| r: 5 | |
| }, { | |
| r: 10 | |
| }, { | |
| r: 20 | |
| }, { | |
| r: 30 | |
| }, { | |
| r: 30 | |
| }, { | |
| r: 10 | |
| }, { | |
| r: 20 | |
| }, { | |
| r: 30 | |
| }, { | |
| r: 30 | |
| }, { | |
| r: 10 | |
| }, { | |
| r: 20 | |
| }, { | |
| r: 30 | |
| }, { | |
| r: 30 | |
| }, { | |
| r: 50 | |
| } | |
| ]; | |
| simulation = d3.forceSimulation().force('center', d3.forceCenter(width / 2, height / 2)).force('collision', d3.forceCollide(function(d) { | |
| return d.r + MIN_PADDING; | |
| })); | |
| nodes = svg.selectAll('.node').data(data); | |
| en_nodes = nodes.enter().append('circle').attrs({ | |
| "class": 'node', | |
| r: function(d) { | |
| return d.r; | |
| } | |
| }); | |
| simulation.nodes(data).on('tick', function() { | |
| return en_nodes.attrs({ | |
| transform: function(d) { | |
| return "translate(" + d.x + ", " + d.y + ")"; | |
| } | |
| }); | |
| }); | |
| }).call(this); |
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