Package org.graphstream.ui.graphicGraph

Class GraphPosLengthUtils

java.lang.Object

org.graphstream.ui.graphicGraph.GraphPosLengthUtils

public class GraphPosLengthUtils
extends Object

Lots of small often used measuring algorithms on graphs.

Use this class with a static import.

Constructor Summary

Constructors

Constructor	Description
GraphPosLengthUtils()

Method Summary

Modifier and Type	Method	Description
static double	edgeLength(Edge edge)	Like edgeLength(Graph,String) but use an existing edge as argument.
static double	edgeLength(Graph graph, String id)	Compute the edge length of the given edge according to its two nodes positions.
static Point3	nodePointPosition(Graph graph, String id)	Retrieve a node position from its attributes ("x", "y", "z", or "xy", or "xyz").
static Point3	nodePointPosition(Node node)	Like nodePointPosition(Graph,String) but use an existing node as argument.
static double[]	nodePosition(Graph graph, String id)	Retrieve a node position from its attributes ("x", "y", "z", or "xy", or "xyz").
static void	nodePosition(Graph graph, String id, double[] xyz)	Like nodePosition(Graph,String), but instead of returning a newly allocated array, fill up the array given as parameter.
static Point3	nodePosition(Graph graph, String id, Point3 pos)	Like nodePointPosition(Graph,String), but instead of returning a newly allocated array, fill up the array given as parameter.
static double[]	nodePosition(Node node)	Like nodePosition(Graph,String) but use an existing node as argument.
static void	nodePosition(Node node, double[] xyz)	Like nodePosition(Graph,String,double[]) but use an existing node as argument.
static Point3	nodePosition(Node node, Point3 pos)	Like nodePosition(Graph,String,Point3) but use an existing node as argument.
static void	positionFromObject(Object o, double[] xyz)	Try to convert an object to a position.
static Point3	positionFromObject(Object o, Point3 pos)	Try to convert an object to a position.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

GraphPosLengthUtils

public GraphPosLengthUtils()

Method Details

nodePosition

public static double[] nodePosition(Graph graph, String id)

Retrieve a node position from its attributes ("x", "y", "z", or "xy", or "xyz").

Parameters:

id - The node identifier.

Returns:

A newly allocated array of three floats containing the (x,y,z) position of the node, or null if the node is not part of the graph.

nodePointPosition

public static Point3 nodePointPosition(Graph graph, String id)

Retrieve a node position from its attributes ("x", "y", "z", or "xy", or "xyz").

Parameters:

id - The node identifier.

Returns:

A newly allocated point containing the (x,y,z) position of the node, or null if the node is not part of the graph.

nodePosition

public static double[] nodePosition(Node node)

Like nodePosition(Graph,String) but use an existing node as argument.

Parameters:

node - The node to consider.

Returns:

A newly allocated array of three floats containing the (x,y,z) position of the node.

nodePointPosition

public static Point3 nodePointPosition(Node node)

Like nodePointPosition(Graph,String) but use an existing node as argument.

Parameters:

node - The node to consider.

Returns:

A newly allocated point containing the (x,y,z) position of the node.

nodePosition

public static void nodePosition(Graph graph, String id, double[] xyz)

Like nodePosition(Graph,String), but instead of returning a newly allocated array, fill up the array given as parameter. This array must have at least three cells.

Parameters:

id - The node identifier.

xyz - An array of at least three cells.

Throws:

RuntimeException - If the node with the given identifier does not exist.

nodePosition

public static Point3 nodePosition(Graph graph, String id, Point3 pos)

Like nodePointPosition(Graph,String), but instead of returning a newly allocated array, fill up the array given as parameter. This array must have at least three cells.

Parameters:

id - The node identifier.

pos - A point that will receive the node position.

Throws:

RuntimeException - If the node with the given identifier does not exist.

nodePosition

public static void nodePosition(Node node, double[] xyz)

Like nodePosition(Graph,String,double[]) but use an existing node as argument.

Parameters:

node - The node to consider.

xyz - An array of at least three cells.

nodePosition

public static Point3 nodePosition(Node node, Point3 pos)

Like nodePosition(Graph,String,Point3) but use an existing node as argument.

Parameters:

node - The node to consider.

pos - A point that will serve as the default position if node doesn't have position

positionFromObject

public static void positionFromObject(Object o, double[] xyz)

Try to convert an object to a position. The object can be an array of numbers, an array of base numeric types or their object counterparts.

Parameters:

o - The object to try to convert.

xyz - The result.

positionFromObject

public static Point3 positionFromObject(Object o, Point3 pos)

Try to convert an object to a position. The object can be an array of numbers, an array of base numeric types or their object counterparts.

Parameters:

o - The object to try to convert.

pos - The default position if object doesn't have position data.

edgeLength

public static double edgeLength(Graph graph, String id)

Compute the edge length of the given edge according to its two nodes positions.

Parameters:

id - The identifier of the edge.

Returns:

The edge length or -1 if the nodes of the edge have no positions.

Throws:

RuntimeException - If the edge cannot be found.

edgeLength

public static double edgeLength(Edge edge)

Like edgeLength(Graph,String) but use an existing edge as argument.

Parameters:

edge -

Returns:

The edge length or -1 if the nodes of the edge have no positions.