695 lines
17 KiB
JavaScript
695 lines
17 KiB
JavaScript
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/* *
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* Networkgraph series
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*
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* (c) 2010-2019 Paweł Fus
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*
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* License: www.highcharts.com/license
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*/
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'use strict';
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import H from '../../parts/Globals.js';
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import 'integrations.js';
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import 'QuadTree.js';
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var pick = H.pick,
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defined = H.defined,
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addEvent = H.addEvent,
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Chart = H.Chart;
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H.layouts = {
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'reingold-fruchterman': function () {
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}
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};
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H.extend(
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/**
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* Reingold-Fruchterman algorithm from
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* "Graph Drawing by Force-directed Placement" paper.
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* @private
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*/
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H.layouts['reingold-fruchterman'].prototype,
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{
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init: function (options) {
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this.options = options;
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this.nodes = [];
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this.links = [];
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this.series = [];
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this.box = {
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x: 0,
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y: 0,
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width: 0,
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height: 0
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};
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this.setInitialRendering(true);
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this.integration = H.networkgraphIntegrations[options.integration];
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this.attractiveForce = pick(
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options.attractiveForce,
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this.integration.attractiveForceFunction
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);
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this.repulsiveForce = pick(
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options.repulsiveForce,
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this.integration.repulsiveForceFunction
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);
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this.approximation = options.approximation;
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},
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start: function () {
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var layout = this,
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series = this.series,
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options = this.options;
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layout.currentStep = 0;
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layout.forces = series[0] && series[0].forces || [];
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if (layout.initialRendering) {
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layout.initPositions();
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// Render elements in initial positions:
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series.forEach(function (s) {
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s.render();
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});
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}
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layout.setK();
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layout.resetSimulation(options);
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if (options.enableSimulation) {
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layout.step();
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}
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},
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step: function () {
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var layout = this,
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series = this.series,
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options = this.options;
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// Algorithm:
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layout.currentStep++;
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if (layout.approximation === 'barnes-hut') {
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layout.createQuadTree();
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layout.quadTree.calculateMassAndCenter();
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}
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layout.forces.forEach(function (forceName) {
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layout[forceName + 'Forces'](layout.temperature);
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});
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// Limit to the plotting area and cool down:
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layout.applyLimits(layout.temperature);
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// Cool down the system:
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layout.temperature = layout.coolDown(
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layout.startTemperature,
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layout.diffTemperature,
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layout.currentStep
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);
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layout.prevSystemTemperature = layout.systemTemperature;
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layout.systemTemperature = layout.getSystemTemperature();
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if (options.enableSimulation) {
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series.forEach(function (s) {
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// Chart could be destroyed during the simulation
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if (s.chart) {
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s.render();
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}
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});
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if (
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layout.maxIterations-- &&
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isFinite(layout.temperature) &&
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!layout.isStable()
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) {
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if (layout.simulation) {
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H.win.cancelAnimationFrame(layout.simulation);
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}
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layout.simulation = H.win.requestAnimationFrame(
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function () {
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layout.step();
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}
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);
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} else {
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layout.simulation = false;
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}
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}
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},
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stop: function () {
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if (this.simulation) {
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H.win.cancelAnimationFrame(this.simulation);
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}
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},
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setArea: function (x, y, w, h) {
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this.box = {
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left: x,
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top: y,
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width: w,
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height: h
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};
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},
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setK: function () {
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// Optimal distance between nodes,
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// available space around the node:
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this.k = this.options.linkLength || this.integration.getK(this);
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},
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addNodes: function (nodes) {
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nodes.forEach(function (node) {
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if (this.nodes.indexOf(node) === -1) {
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this.nodes.push(node);
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}
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}, this);
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},
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removeNode: function (node) {
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var index = this.nodes.indexOf(node);
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if (index !== -1) {
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this.nodes.splice(index, 1);
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}
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},
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removeLink: function (link) {
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var index = this.links.indexOf(link);
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if (index !== -1) {
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this.links.splice(index, 1);
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}
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},
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addLinks: function (links) {
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links.forEach(function (link) {
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if (this.links.indexOf(link) === -1) {
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this.links.push(link);
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}
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}, this);
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},
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addSeries: function (series) {
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if (this.series.indexOf(series) === -1) {
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this.series.push(series);
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}
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},
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clear: function () {
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this.nodes.length = 0;
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this.links.length = 0;
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this.series.length = 0;
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this.resetSimulation();
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},
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resetSimulation: function () {
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this.forcedStop = false;
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this.systemTemperature = 0;
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this.setMaxIterations();
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this.setTemperature();
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this.setDiffTemperature();
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},
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setMaxIterations: function (maxIterations) {
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this.maxIterations = pick(
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maxIterations,
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this.options.maxIterations
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);
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},
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setTemperature: function () {
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this.temperature = this.startTemperature =
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Math.sqrt(this.nodes.length);
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},
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setDiffTemperature: function () {
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this.diffTemperature = this.startTemperature /
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(this.options.maxIterations + 1);
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},
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setInitialRendering: function (enable) {
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this.initialRendering = enable;
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},
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createQuadTree: function () {
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this.quadTree = new H.QuadTree(
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this.box.left,
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this.box.top,
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this.box.width,
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this.box.height
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);
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this.quadTree.insertNodes(this.nodes);
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},
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initPositions: function () {
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var initialPositions = this.options.initialPositions;
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if (H.isFunction(initialPositions)) {
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initialPositions.call(this);
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this.nodes.forEach(function (node) {
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if (!defined(node.prevX)) {
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node.prevX = node.plotX;
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}
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if (!defined(node.prevY)) {
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node.prevY = node.plotY;
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}
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node.dispX = 0;
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node.dispY = 0;
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});
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} else if (initialPositions === 'circle') {
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this.setCircularPositions();
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} else {
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this.setRandomPositions();
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}
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},
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setCircularPositions: function () {
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var box = this.box,
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nodes = this.nodes,
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nodesLength = nodes.length + 1,
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angle = 2 * Math.PI / nodesLength,
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rootNodes = nodes.filter(function (node) {
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return node.linksTo.length === 0;
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}),
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sortedNodes = [],
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visitedNodes = {},
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radius = this.options.initialPositionRadius;
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function addToNodes(node) {
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node.linksFrom.forEach(function (link) {
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if (!visitedNodes[link.toNode.id]) {
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visitedNodes[link.toNode.id] = true;
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sortedNodes.push(link.toNode);
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addToNodes(link.toNode);
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}
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});
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}
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// Start with identified root nodes an sort the nodes by their
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// hierarchy. In trees, this ensures that branches don't cross
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// eachother.
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rootNodes.forEach(function (rootNode) {
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sortedNodes.push(rootNode);
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addToNodes(rootNode);
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});
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// Cyclic tree, no root node found
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if (!sortedNodes.length) {
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sortedNodes = nodes;
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// Dangling, cyclic trees
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} else {
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nodes.forEach(function (node) {
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if (sortedNodes.indexOf(node) === -1) {
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sortedNodes.push(node);
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}
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});
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}
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// Initial positions are laid out along a small circle, appearing
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// as a cluster in the middle
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sortedNodes.forEach(function (node, index) {
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node.plotX = node.prevX = pick(
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node.plotX,
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box.width / 2 + radius * Math.cos(index * angle)
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);
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node.plotY = node.prevY = pick(
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node.plotY,
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box.height / 2 + radius * Math.sin(index * angle)
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);
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node.dispX = 0;
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node.dispY = 0;
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});
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},
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setRandomPositions: function () {
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var box = this.box,
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nodes = this.nodes,
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nodesLength = nodes.length + 1;
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// Return a repeatable, quasi-random number based on an integer
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// input. For the initial positions
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function unrandom(n) {
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var rand = n * n / Math.PI;
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rand = rand - Math.floor(rand);
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return rand;
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}
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// Initial positions:
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nodes.forEach(
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function (node, index) {
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node.plotX = node.prevX = pick(
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node.plotX,
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box.width * unrandom(index)
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);
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node.plotY = node.prevY = pick(
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node.plotY,
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box.height * unrandom(nodesLength + index)
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);
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node.dispX = 0;
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node.dispY = 0;
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}
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);
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},
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force: function (name) {
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this.integration[name].apply(
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this,
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Array.prototype.slice.call(arguments, 1)
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);
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},
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barycenterForces: function () {
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this.getBarycenter();
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this.force('barycenter');
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},
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getBarycenter: function () {
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var systemMass = 0,
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cx = 0,
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cy = 0;
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this.nodes.forEach(function (node) {
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cx += node.plotX * node.mass;
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cy += node.plotY * node.mass;
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systemMass += node.mass;
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});
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this.barycenter = {
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x: cx,
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y: cy,
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xFactor: cx / systemMass,
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yFactor: cy / systemMass
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};
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return this.barycenter;
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},
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barnesHutApproximation: function (node, quadNode) {
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var layout = this,
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distanceXY = layout.getDistXY(node, quadNode),
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distanceR = layout.vectorLength(distanceXY),
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goDeeper,
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force;
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if (node !== quadNode && distanceR !== 0) {
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if (quadNode.isInternal) {
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// Internal node:
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if (
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quadNode.boxSize / distanceR < layout.options.theta &&
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distanceR !== 0
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) {
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// Treat as an external node:
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force = layout.repulsiveForce(distanceR, layout.k);
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layout.force(
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'repulsive',
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node,
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force * quadNode.mass,
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distanceXY,
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distanceR
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);
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goDeeper = false;
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} else {
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// Go deeper:
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goDeeper = true;
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}
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} else {
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// External node, direct force:
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force = layout.repulsiveForce(distanceR, layout.k);
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layout.force(
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'repulsive',
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node,
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force * quadNode.mass,
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distanceXY,
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distanceR
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);
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}
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}
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return goDeeper;
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||
|
|
},
|
||
|
|
repulsiveForces: function () {
|
||
|
|
var layout = this;
|
||
|
|
|
||
|
|
if (layout.approximation === 'barnes-hut') {
|
||
|
|
layout.nodes.forEach(function (node) {
|
||
|
|
layout.quadTree.visitNodeRecursive(
|
||
|
|
null,
|
||
|
|
function (quadNode) {
|
||
|
|
return layout.barnesHutApproximation(
|
||
|
|
node,
|
||
|
|
quadNode
|
||
|
|
);
|
||
|
|
}
|
||
|
|
);
|
||
|
|
});
|
||
|
|
} else {
|
||
|
|
layout.nodes.forEach(function (node) {
|
||
|
|
layout.nodes.forEach(function (repNode) {
|
||
|
|
var force,
|
||
|
|
distanceR,
|
||
|
|
distanceXY;
|
||
|
|
|
||
|
|
if (
|
||
|
|
// Node can not repulse itself:
|
||
|
|
node !== repNode &&
|
||
|
|
// Only close nodes affect each other:
|
||
|
|
/* layout.getDistR(node, repNode) < 2 * k && */
|
||
|
|
// Not dragged:
|
||
|
|
!node.fixedPosition
|
||
|
|
) {
|
||
|
|
distanceXY = layout.getDistXY(node, repNode);
|
||
|
|
distanceR = layout.vectorLength(distanceXY);
|
||
|
|
|
||
|
|
force = layout.repulsiveForce(distanceR, layout.k);
|
||
|
|
|
||
|
|
layout.force(
|
||
|
|
'repulsive',
|
||
|
|
node,
|
||
|
|
force * repNode.mass,
|
||
|
|
distanceXY,
|
||
|
|
distanceR
|
||
|
|
);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
});
|
||
|
|
}
|
||
|
|
},
|
||
|
|
attractiveForces: function () {
|
||
|
|
var layout = this,
|
||
|
|
distanceXY,
|
||
|
|
distanceR,
|
||
|
|
force;
|
||
|
|
|
||
|
|
layout.links.forEach(function (link) {
|
||
|
|
if (link.fromNode && link.toNode) {
|
||
|
|
distanceXY = layout.getDistXY(
|
||
|
|
link.fromNode,
|
||
|
|
link.toNode
|
||
|
|
);
|
||
|
|
distanceR = layout.vectorLength(distanceXY);
|
||
|
|
|
||
|
|
if (distanceR !== 0) {
|
||
|
|
force = layout.attractiveForce(distanceR, layout.k);
|
||
|
|
|
||
|
|
layout.force(
|
||
|
|
'attractive',
|
||
|
|
link,
|
||
|
|
force,
|
||
|
|
distanceXY,
|
||
|
|
distanceR
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|
||
|
|
},
|
||
|
|
applyLimits: function () {
|
||
|
|
var layout = this,
|
||
|
|
nodes = layout.nodes;
|
||
|
|
|
||
|
|
nodes.forEach(function (node) {
|
||
|
|
if (node.fixedPosition) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
layout.integration.integrate(layout, node);
|
||
|
|
|
||
|
|
layout.applyLimitBox(node, layout.box);
|
||
|
|
|
||
|
|
// Reset displacement:
|
||
|
|
node.dispX = 0;
|
||
|
|
node.dispY = 0;
|
||
|
|
});
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* External box that nodes should fall. When hitting an edge, node
|
||
|
|
* should stop or bounce.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
applyLimitBox: function (node, box) {
|
||
|
|
var radius = node.marker && node.marker.radius || 0;
|
||
|
|
/*
|
||
|
|
TO DO: Consider elastic collision instead of stopping.
|
||
|
|
o' means end position when hitting plotting area edge:
|
||
|
|
|
||
|
|
- "inelastic":
|
||
|
|
o
|
||
|
|
\
|
||
|
|
______
|
||
|
|
| o'
|
||
|
|
| \
|
||
|
|
| \
|
||
|
|
|
||
|
|
- "elastic"/"bounced":
|
||
|
|
o
|
||
|
|
\
|
||
|
|
______
|
||
|
|
| ^
|
||
|
|
| / \
|
||
|
|
|o' \
|
||
|
|
|
||
|
|
Euler sample:
|
||
|
|
if (plotX < 0) {
|
||
|
|
plotX = 0;
|
||
|
|
dispX *= -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (plotX > box.width) {
|
||
|
|
plotX = box.width;
|
||
|
|
dispX *= -1;
|
||
|
|
}
|
||
|
|
|
||
|
|
*/
|
||
|
|
// Limit X-coordinates:
|
||
|
|
node.plotX = Math.max(
|
||
|
|
Math.min(
|
||
|
|
node.plotX,
|
||
|
|
box.width - radius
|
||
|
|
),
|
||
|
|
box.left + radius
|
||
|
|
);
|
||
|
|
|
||
|
|
// Limit Y-coordinates:
|
||
|
|
node.plotY = Math.max(
|
||
|
|
Math.min(
|
||
|
|
node.plotY,
|
||
|
|
box.height - radius
|
||
|
|
),
|
||
|
|
box.top + radius
|
||
|
|
);
|
||
|
|
},
|
||
|
|
/**
|
||
|
|
* From "A comparison of simulated annealing cooling strategies" by
|
||
|
|
* Nourani and Andresen work.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
coolDown: function (temperature, temperatureStep, currentStep) {
|
||
|
|
// Logarithmic:
|
||
|
|
/*
|
||
|
|
return Math.sqrt(this.nodes.length) -
|
||
|
|
Math.log(
|
||
|
|
currentStep * layout.diffTemperature
|
||
|
|
);
|
||
|
|
*/
|
||
|
|
|
||
|
|
// Exponential:
|
||
|
|
/*
|
||
|
|
var alpha = 0.1;
|
||
|
|
layout.temperature = Math.sqrt(layout.nodes.length) *
|
||
|
|
Math.pow(alpha, layout.diffTemperature);
|
||
|
|
*/
|
||
|
|
// Linear:
|
||
|
|
return temperature - temperatureStep * currentStep;
|
||
|
|
},
|
||
|
|
isStable: function () {
|
||
|
|
return Math.abs(
|
||
|
|
this.systemTemperature -
|
||
|
|
this.prevSystemTemperature
|
||
|
|
) < 0.00001 || this.temperature <= 0;
|
||
|
|
},
|
||
|
|
getSystemTemperature: function () {
|
||
|
|
return this.nodes.reduce(function (value, node) {
|
||
|
|
return value + node.temperature;
|
||
|
|
}, 0);
|
||
|
|
},
|
||
|
|
vectorLength: function (vector) {
|
||
|
|
return Math.sqrt(vector.x * vector.x + vector.y * vector.y);
|
||
|
|
},
|
||
|
|
getDistR: function (nodeA, nodeB) {
|
||
|
|
var distance = this.getDistXY(nodeA, nodeB);
|
||
|
|
|
||
|
|
return this.vectorLength(distance);
|
||
|
|
},
|
||
|
|
getDistXY: function (nodeA, nodeB) {
|
||
|
|
var xDist = nodeA.plotX - nodeB.plotX,
|
||
|
|
yDist = nodeA.plotY - nodeB.plotY;
|
||
|
|
|
||
|
|
return {
|
||
|
|
x: xDist,
|
||
|
|
y: yDist,
|
||
|
|
absX: Math.abs(xDist),
|
||
|
|
absY: Math.abs(yDist)
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Multiple series support:
|
||
|
|
*/
|
||
|
|
// Clear previous layouts
|
||
|
|
addEvent(Chart, 'predraw', function () {
|
||
|
|
if (this.graphLayoutsLookup) {
|
||
|
|
this.graphLayoutsLookup.forEach(
|
||
|
|
function (layout) {
|
||
|
|
layout.stop();
|
||
|
|
}
|
||
|
|
);
|
||
|
|
}
|
||
|
|
});
|
||
|
|
addEvent(Chart, 'render', function () {
|
||
|
|
var systemsStable,
|
||
|
|
afterRender = false;
|
||
|
|
|
||
|
|
function layoutStep(layout) {
|
||
|
|
if (
|
||
|
|
layout.maxIterations-- &&
|
||
|
|
isFinite(layout.temperature) &&
|
||
|
|
!layout.isStable() &&
|
||
|
|
!layout.options.enableSimulation
|
||
|
|
) {
|
||
|
|
// Hook similar to build-in addEvent, but instead of
|
||
|
|
// creating whole events logic, use just a function.
|
||
|
|
// It's faster which is important for rAF code.
|
||
|
|
// Used e.g. in packed-bubble series for bubble radius
|
||
|
|
// calculations
|
||
|
|
if (layout.beforeStep) {
|
||
|
|
layout.beforeStep();
|
||
|
|
}
|
||
|
|
|
||
|
|
layout.step();
|
||
|
|
systemsStable = false;
|
||
|
|
afterRender = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (this.graphLayoutsLookup) {
|
||
|
|
H.setAnimation(false, this);
|
||
|
|
// Start simulation
|
||
|
|
this.graphLayoutsLookup.forEach(
|
||
|
|
function (layout) {
|
||
|
|
layout.start();
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
// Just one sync step, to run different layouts similar to
|
||
|
|
// async mode.
|
||
|
|
while (!systemsStable) {
|
||
|
|
systemsStable = true;
|
||
|
|
this.graphLayoutsLookup.forEach(layoutStep);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (afterRender) {
|
||
|
|
this.series.forEach(function (s) {
|
||
|
|
if (s && s.layout) {
|
||
|
|
s.render();
|
||
|
|
}
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
});
|