| author | Nicolas Sauret <nicolas.sauret@iri.centrepompidou.fr> |
| Thu, 10 Apr 2014 14:20:23 +0200 | |
| changeset 47 | c0b4a8b5a012 |
| permissions | -rw-r--r-- |
|
47
c0b4a8b5a012
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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>Clustered Network</title> |
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5 |
<script type="text/javascript" src="../../d3.js"></script> |
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<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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svg { |
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border: 1px solid #ccc; |
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11 |
} |
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12 |
body { |
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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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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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curve = d3.svg.line().interpolate("cardinal-closed").tension(.85), |
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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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return n.size ? "_g_"+n.group : n.name; |
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46 |
} |
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47 |
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function linkid(l) { |
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var u = nodeid(l.source), |
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v = nodeid(l.target); |
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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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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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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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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 |
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217 |
node = nodeg.selectAll("circle.node").data(net.nodes, nodeid); |
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218 |
node.exit().remove(); |
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219 |
node.enter().append("svg:circle") |
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220 |
.attr("class", function(d) { return "node" + (d.size?"":" leaf"); }) |
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221 |
.attr("r", function(d) { return d.size ? d.size + dr : dr+1; }) |
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222 |
.attr("cx", function(d) { return d.x; }) |
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223 |
.attr("cy", function(d) { return d.y; }) |
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224 |
.style("fill", function(d) { return fill(d.group); }) |
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225 |
.on("dblclick", function(d) { |
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226 |
if (d.size) { expand[d.group] = true; init(); } |
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227 |
}); |
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228 |
|
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229 |
node.call(force.drag); |
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230 |
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231 |
force.on("tick", function() { |
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232 |
if (!hull.empty()) { |
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233 |
hull.data(convexHulls(net.nodes, getGroup, off)) |
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234 |
.attr("d", drawCluster); |
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235 |
} |
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236 |
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237 |
link.attr("x1", function(d) { return d.source.x; }) |
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238 |
.attr("y1", function(d) { return d.source.y; }) |
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239 |
.attr("x2", function(d) { return d.target.x; }) |
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240 |
.attr("y2", function(d) { return d.target.y; }); |
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241 |
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242 |
node.attr("cx", function(d) { return d.x; }) |
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243 |
.attr("cy", function(d) { return d.y; }); |
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244 |
}); |
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245 |
} |
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246 |
|
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247 |
</script> |
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248 |
</body> |
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249 |
</html> |