1 | <!DOCTYPE html> |
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2 | <html> |
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3 | <head> |
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4 | <title>Clustered Network</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 | svg { |
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10 | border: 1px solid #ccc; |
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11 | } |
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12 | body { |
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13 | font: 10px sans-serif; |
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14 | } |
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15 | circle.node { |
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16 | fill: lightsteelblue; |
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17 | stroke: #fff; |
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18 | stroke-width: 1.5px; |
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19 | } |
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20 | path.hull { |
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21 | fill: lightsteelblue; |
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22 | fill-opacity: 0.3; |
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23 | } |
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24 | line.link { |
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25 | stroke: #333; |
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26 | stroke-opacity: 0.5; |
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27 | pointer-events: none; |
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28 | } |
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29 | </style> |
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30 | </head> |
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31 | <body> |
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32 | <script type="text/javascript"> |
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33 | var w = 960, // svg width |
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34 | h = 600, // svg height |
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35 | dr = 4, // default point radius |
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36 | off = 15, // cluster hull offset |
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37 | expand = {}, // expanded clusters |
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38 | data, net, force, hullg, hull, linkg, link, nodeg, node, |
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39 | curve = d3.svg.line().interpolate("cardinal-closed").tension(.85), |
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40 | fill = d3.scale.category20(); |
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41 | |
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42 | function noop() { return false; } |
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43 | |
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44 | function nodeid(n) { |
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45 | return n.size ? "_g_"+n.group : n.name; |
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46 | } |
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47 | |
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48 | function linkid(l) { |
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49 | var u = nodeid(l.source), |
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50 | v = nodeid(l.target); |
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51 | return u<v ? u+"|"+v : v+"|"+u; |
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52 | } |
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53 | |
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54 | function getGroup(n) { return n.group; } |
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55 | |
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56 | // constructs the network to visualize |
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57 | function network(data, prev, index, expand) { |
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58 | expand = expand || {}; |
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59 | var gm = {}, // group map |
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60 | nm = {}, // node map |
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61 | lm = {}, // link map |
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62 | gn = {}, // previous group nodes |
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63 | gc = {}, // previous group centroids |
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64 | nodes = [], // output nodes |
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65 | links = []; // output links |
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66 | |
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67 | // process previous nodes for reuse or centroid calculation |
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68 | if (prev) { |
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69 | prev.nodes.forEach(function(n) { |
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70 | var i = index(n), o; |
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71 | if (n.size > 0) { |
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72 | gn[i] = n; |
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73 | n.size = 0; |
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74 | } else { |
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75 | o = gc[i] || (gc[i] = {x:0,y:0,count:0}); |
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76 | o.x += n.x; |
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77 | o.y += n.y; |
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78 | o.count += 1; |
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79 | } |
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80 | }); |
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81 | } |
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82 | |
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83 | // determine nodes |
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84 | for (var k=0; k<data.nodes.length; ++k) { |
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85 | var n = data.nodes[k], |
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86 | i = index(n); |
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87 | |
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88 | if (expand[i]) { |
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89 | // the node should be directly visible |
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90 | nm[n.name] = nodes.length; |
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91 | nodes.push(n); |
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92 | if (gn[i]) { |
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93 | // place new nodes at cluster location (plus jitter) |
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94 | n.x = gn[i].x + Math.random(); |
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95 | n.y = gn[i].y + Math.random(); |
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96 | } |
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97 | } else { |
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98 | // the node is part of a collapsed cluster |
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99 | var l = gm[i] || (gm[i]=gn[i]) || (gm[i]={group:i, size:0, nodes:[]}); |
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100 | if (l.size == 0) { |
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101 | // if new cluster, add to set and position at centroid of leaf nodes |
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102 | nm[i] = nodes.length; |
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103 | nodes.push(l); |
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104 | if (gc[i]) { |
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105 | l.x = gc[i].x / gc[i].count; |
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106 | l.y = gc[i].y / gc[i].count; |
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107 | } |
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108 | } |
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109 | l.size += 1; |
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110 | l.nodes.push(n); |
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111 | } |
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112 | } |
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113 | |
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114 | // determine links |
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115 | for (k=0; k<data.links.length; ++k) { |
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116 | var e = data.links[k], |
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117 | u = index(e.source), |
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118 | v = index(e.target); |
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119 | u = expand[u] ? nm[e.source.name] : nm[u]; |
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120 | v = expand[v] ? nm[e.target.name] : nm[v]; |
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121 | var i = (u<v ? u+"|"+v : v+"|"+u), |
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122 | l = lm[i] || (lm[i] = {source:u, target:v, size:0}); |
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123 | l.size += 1; |
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124 | } |
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125 | for (i in lm) { links.push(lm[i]); } |
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126 | |
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127 | return {nodes: nodes, links: links}; |
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128 | } |
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129 | |
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130 | function convexHulls(nodes, index, offset) { |
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131 | var h = {}; |
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132 | |
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133 | // create point sets |
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134 | for (var k=0; k<nodes.length; ++k) { |
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135 | var n = nodes[k]; |
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136 | if (n.size) continue; |
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137 | var i = index(n), |
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138 | l = h[i] || (h[i] = []); |
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139 | l.push([n.x-offset, n.y-offset]); |
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140 | l.push([n.x-offset, n.y+offset]); |
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141 | l.push([n.x+offset, n.y-offset]); |
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142 | l.push([n.x+offset, n.y+offset]); |
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143 | } |
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144 | |
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145 | // create convex hulls |
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146 | var hulls = []; |
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147 | for (i in h) { |
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148 | hulls.push({group: i, path: d3.geom.hull(h[i])}); |
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149 | } |
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150 | |
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151 | return hulls; |
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152 | } |
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153 | |
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154 | function drawCluster(d) { |
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155 | return curve(d.path); // 0.8 |
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156 | } |
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157 | |
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158 | // -------------------------------------------------------- |
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159 | |
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160 | var body = d3.select("body"); |
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161 | |
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162 | var vis = body.append("svg:svg") |
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163 | .attr("width", w) |
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164 | .attr("height", h); |
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165 | |
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166 | d3.json("miserables.json", function(json) { |
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167 | data = json; |
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168 | for (var i=0; i<data.links.length; ++i) { |
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169 | o = data.links[i]; |
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170 | o.source = data.nodes[o.source]; |
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171 | o.target = data.nodes[o.target]; |
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172 | } |
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173 | |
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174 | hullg = vis.append("svg:g"); |
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175 | linkg = vis.append("svg:g"); |
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176 | nodeg = vis.append("svg:g"); |
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177 | |
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178 | init(); |
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179 | |
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180 | vis.attr("opacity", 1e-6) |
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181 | .transition() |
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182 | .duration(1000) |
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183 | .attr("opacity", 1); |
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184 | }); |
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185 | |
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186 | function init() { |
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187 | if (force) force.stop(); |
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188 | |
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189 | net = network(data, net, getGroup, expand); |
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190 | |
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191 | force = d3.layout.force() |
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192 | .nodes(net.nodes) |
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193 | .links(net.links) |
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194 | .size([w, h]) |
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195 | .linkDistance(50) |
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196 | .start(); |
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197 | |
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198 | hullg.selectAll("path.hull").remove(); |
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199 | hull = hullg.selectAll("path.hull") |
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200 | .data(convexHulls(net.nodes, getGroup, off)) |
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201 | .enter().append("svg:path") |
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202 | .attr("class", "hull") |
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203 | .attr("d", drawCluster) |
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204 | .style("fill", function(d) { return fill(d.group); }) |
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205 | .on("dblclick", function(d) { expand[d.group] = false; init(); }); |
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206 | |
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207 | link = linkg.selectAll("line.link").data(net.links, linkid); |
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208 | link.exit().remove(); |
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209 | link.enter().append("svg:line") |
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210 | .attr("class", "link") |
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211 | .attr("x1", function(d) { return d.source.x; }) |
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212 | .attr("y1", function(d) { return d.source.y; }) |
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213 | .attr("x2", function(d) { return d.target.x; }) |
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214 | .attr("y2", function(d) { return d.target.y; }) |
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215 | .style("stroke-width", function(d) { return d.size || 1; }); |
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216 | link = linkg.selectAll("line.link"); |
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217 | |
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218 | node = nodeg.selectAll("circle.node").data(net.nodes, nodeid); |
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219 | node.exit().remove(); |
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220 | node.enter().append("svg:circle") |
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221 | .attr("class", function(d) { return "node" + (d.size?"":" leaf"); }) |
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222 | .attr("r", function(d) { return d.size ? d.size + dr : dr+1; }) |
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223 | .attr("cx", function(d) { return d.x; }) |
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224 | .attr("cy", function(d) { return d.y; }) |
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225 | .style("fill", function(d) { return fill(d.group); }) |
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226 | .on("dblclick", function(d) { |
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227 | if (d.size) { expand[d.group] = true; init(); } |
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228 | }); |
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229 | |
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230 | node = nodeg.selectAll("circle.node") |
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231 | .call(force.drag); |
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232 | |
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233 | force.on("tick", function() { |
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234 | if (!hull.empty()) { |
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235 | hull.data(convexHulls(net.nodes, getGroup, off)) |
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236 | .attr("d", drawCluster); |
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237 | } |
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238 | |
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239 | link.attr("x1", function(d) { return d.source.x; }) |
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240 | .attr("y1", function(d) { return d.source.y; }) |
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241 | .attr("x2", function(d) { return d.target.x; }) |
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242 | .attr("y2", function(d) { return d.target.y; }); |
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243 | |
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244 | node.attr("cx", function(d) { return d.x; }) |
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245 | .attr("cy", function(d) { return d.y; }); |
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246 | }); |
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247 | } |
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248 | |
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249 | </script> |
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250 | </body> |
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251 | </html> |
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