Source: metrics/NodeDegreeMetric.js

  1. /**
  2.  * the object for the node-degree metric
  3.  */
  4. var NodeDegreeMetric = {};
  6. // define the ranges for the visual link- and node-properties
  7. NodeDegreeMetric.scaleFontSize = d3.scale.linear().range([20, 100]);
  8. NodeDegreeMetric.scaleFontColor = d3.scale.linear().range(["#A8C8FF", "#000B82"]);
  9. NodeDegreeMetric.scaleLinkWidth = d3.scale.linear().range([4, 20]);
  13. /**
  14.  * determines the domains of the ranges for the visual link- and node-properties
  15.  * 
  16.  * @param {array} nodes All nodes of a graph
  17.  * @param {array} links All links of a graph
  18.  */
  19. NodeDegreeMetric.setDomains = function(nodes, links)
  20. {
  21. 	// determine the domain of the node-properties
  22. 	this.scaleFontSize.domain([d3.min(nodes, function(node) {return d3.min(node.subnodes, function(subnode) {return subnode.inDegree + subnode.outDegree;})}),
  23. 	                           d3.max(nodes, function(node) {return d3.max(node.subnodes, function(subnode) {return subnode.inDegree + subnode.outDegree;})})]);
  25. 	this.scaleFontColor.domain([0.0, 1.0]);
  26. 	
  27. 	
  28. 	// determine the domain of the link-properties
  29. 	this.scaleLinkWidth.domain([d3.min(links, function(link) {return link.count;}),
  30. 	                            d3.max(links, function(link) {return link.count;})]);
  31. }
  35. /**
  36.  * determines the font-size for the given node according to this metric
  37.  * 
  38.  * @param {object} node A single node of a graph
  39.  * 
  40.  * @returns the font-size
  41.  */
  42. NodeDegreeMetric.getFontSize = function(node)
  43. {
  44. 	return this.scaleFontSize(node.inDegree + node.outDegree);
  45. }
  49. /**
  50.  * determines the font-color for the given node according to this metric
  51.  * 
  52.  * @param {object} node A single node of a graph
  53.  * 
  54.  * @returns the font-color
  55.  */
  56. NodeDegreeMetric.getFontColor = function(node)
  57. {
  58. 	return this.scaleFontColor(node.outDegree / (node.inDegree + node.outDegree));
  59. }
  63. /**
  64.  * determines the width for the given link according to this metric
  65.  * 
  66.  * @param {object} link A single link of a graph
  67.  * 
  68.  * @returns the link-width
  69.  */
  70. NodeDegreeMetric.getLinkWidth = function(link)
  71. {
  72. 	return this.scaleLinkWidth(link.count);
  73. }