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1 <!DOCTYPE html> |
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2 <html> |
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3 <head> |
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4 <title>Force-Directed Layout</title> |
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5 <script type="text/javascript" src="../../d3.js"></script> |
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6 <script type="text/javascript" src="../../d3.geom.js"></script> |
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7 <script type="text/javascript" src="../../d3.layout.js"></script> |
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8 <style type="text/css"> |
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9 |
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10 circle { |
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11 stroke-width: 1.5px; |
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12 } |
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13 |
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14 line { |
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15 stroke: #999; |
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16 } |
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17 |
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18 </style> |
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19 </head> |
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20 <body> |
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21 <script type="text/javascript"> |
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22 |
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23 var w = 960, |
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24 h = 500, |
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25 r = 6, |
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26 fill = d3.scale.category20(); |
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27 |
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28 var force = d3.layout.force() |
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29 .gravity(.01) |
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30 .charge(-120) |
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31 .linkDistance(30) |
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32 .size([w, h]); |
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33 |
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34 var svg = d3.select("body").append("svg:svg") |
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35 .attr("width", w) |
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36 .attr("height", h); |
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37 |
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38 d3.json("miserables.json", function(json) { |
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39 var link = svg.selectAll("line") |
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40 .data(json.links) |
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41 .enter().append("svg:line"); |
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42 |
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43 var node = svg.selectAll("circle") |
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44 .data(json.nodes) |
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45 .enter().append("svg:circle") |
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46 .attr("r", r - .75) |
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47 .style("fill", function(d) { return fill(d.group); }) |
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48 .style("stroke", function(d) { return d3.rgb(fill(d.group)).darker(); }) |
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49 .call(force.drag); |
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50 |
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51 force |
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52 .nodes(json.nodes) |
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53 .links(json.links) |
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54 .on("tick", tick) |
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55 .start(); |
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56 |
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57 function tick() { |
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58 node.attr("cx", function(d) { return d.x = Math.max(r, Math.min(w - r, d.x)); }) |
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59 .attr("cy", function(d) { return d.y = Math.max(r, Math.min(h - r, d.y)); }); |
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60 |
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61 link.attr("x1", function(d) { return d.source.x; }) |
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62 .attr("y1", function(d) { return d.source.y; }) |
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63 .attr("x2", function(d) { return d.target.x; }) |
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64 .attr("y2", function(d) { return d.target.y; }); |
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65 } |
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66 }); |
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67 |
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68 </script> |
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69 </body> |
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70 </html> |