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28 lines
623 B
28 lines
623 B
var _ = require("../lodash");
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module.exports = barycenter;
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function barycenter(g, movable) {
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return _.map(movable, function(v) {
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var inV = g.inEdges(v);
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if (!inV.length) {
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return { v: v };
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} else {
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var result = _.reduce(inV, function(acc, e) {
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var edge = g.edge(e),
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nodeU = g.node(e.v);
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return {
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sum: acc.sum + (edge.weight * nodeU.order),
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weight: acc.weight + edge.weight
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};
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}, { sum: 0, weight: 0 });
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return {
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v: v,
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barycenter: result.sum / result.weight,
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weight: result.weight
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};
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}
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});
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}
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