lv.lumii.layoutengine.springembedder

Class TimedSpringEmbedder

java.lang.Object

lv.lumii.layoutengine.springembedder.TimedSpringEmbedder

public final class TimedSpringEmbedder
extends java.lang.Object

This class defines the spring embedder class. The spring embedder layout uses a heuristical force directed algorithm for producing graph layouts. There are two kinds of forces: repulsive between any two nodes, and attractive between nodes connected with an edge. The equilibruim of these forces defines the layout.

Constructor Summary

Constructors

Constructor and Description
TimedSpringEmbedder(int nodes, int edges, int RandSeed) This constructor creates a spring embedder class with n nodes and m edges.

Method Summary

Modifier and Type	Method and Description
void	initLayout(double spacing, double[] nodeX, double[] nodeY, double[] nodeRadius, int[] edgeSourceId, int[] edgeTargetId, boolean incremental, boolean[] lockedNodes, double degreeModifier, double[] edgeStrength) does only initalization part of layout
void	layout(double spacing, double[] nodeX, double[] nodeY, double[] nodeRadius, int[] edgeSourceId, int[] edgeTargetId, boolean incremental, boolean[] lockedNodes, double degreeModifier, double[] edgeStrength, int realNodeCount, java.util.List<AbstractContainer> boxes, LayoutConstraints constr, java.util.List<LayoutLine> layoutLines)
void	timedLayout(double[] nodeX, double[] nodeY, double time)
void	updateLayoutData(double spacing, double[] nodeX, double[] nodeY, double[] nodeRadius, boolean[] lockedNodes, double degreeModifier, double[] edgeStrength) updates the graph data

Methods inherited from class java.lang.Object

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

Constructor Detail

TimedSpringEmbedder

public TimedSpringEmbedder(int nodes,
                           int edges,
                           int RandSeed)

This constructor creates a spring embedder class with n nodes and m edges. It also initializes the random generator with the defined seed.

Parameters:

nodes - Number of nodes

edges - Number of edges

RandSeed - Random seed

Method Detail

layout

public void layout(double spacing,
                   double[] nodeX,
                   double[] nodeY,
                   double[] nodeRadius,
                   int[] edgeSourceId,
                   int[] edgeTargetId,
                   boolean incremental,
                   boolean[] lockedNodes,
                   double degreeModifier,
                   double[] edgeStrength,
                   int realNodeCount,
                   java.util.List<AbstractContainer> boxes,
                   LayoutConstraints constr,
                   java.util.List<LayoutLine> layoutLines)

Parameters:

spacing - desired separation of nodes (input)

nodeX - x coordinates of node centers (output, input when incr=true)

nodeY - y coordinates of node centers (output, input when incr=true)

nodeRadius - node radius (input)

edgeSourceId - from node index of the edges (input)

edgeTargetId - to node index of the edges (input)

incremental - incremental mode

lockedNodes - flag if the node is locked

edgeStrength - the strength of each edge. Default is 1.

realNodeCount - all anodes with indices bigger than this are considered to be dummy. Repulsive forces are not calculated for dummy nodes. all edges

initLayout

public void initLayout(double spacing,
                       double[] nodeX,
                       double[] nodeY,
                       double[] nodeRadius,
                       int[] edgeSourceId,
                       int[] edgeTargetId,
                       boolean incremental,
                       boolean[] lockedNodes,
                       double degreeModifier,
                       double[] edgeStrength)

does only initalization part of layout

Parameters:

spacing - desired separation of nodes (input)

nodeX - x coordinates of node centers (output, input when incr=true)

nodeY - y coordinates of node centers (output, input when incr=true)

nodeRadius - node radius (input)

edgeSourceId - from node index of the edges (input)

edgeTargetId - to node index of the edges (input)

incremental - incremental mode

lockedNodes - flag if the node is locked all edges

updateLayoutData

public void updateLayoutData(double spacing,
                             double[] nodeX,
                             double[] nodeY,
                             double[] nodeRadius,
                             boolean[] lockedNodes,
                             double degreeModifier,
                             double[] edgeStrength)

updates the graph data

Parameters:

spacing - desired separation of nodes (input)

nodeX - x coordinates of node centers (output, input when incr=true)

nodeY - y coordinates of node centers (output, input when incr=true)

nodeRadius - node radius (input)

lockedNodes - flag if the node is locked higher temperature means that node is moving slower

timedLayout

public void timedLayout(double[] nodeX,
                        double[] nodeY,
                        double time)