cz.cuni.amis.pogamut.defcon.utils.quadtree
Class QuadTreeNode

java.lang.Object
  cz.cuni.amis.pogamut.defcon.utils.quadtree.QuadTreeNode

public class QuadTreeNode
extends Object

Node for a QuadTree.

Author:

Radek 'Black_Hand' Pibil

Constructor Summary

QuadTreeNode(QuadTree quadTree, double x1, double y1, double x2, double y2, QuadTreeNode parent, List<List<Location>> subList)
Constructor for a tree node.

Method Summary

Location	getCenter() Retrieves a point [ (x1 + x2) / 2, (y1 + y2) / 2 ].
QuadTreeNode	getFirst() Returns the upper left child node.
QuadTreeNode	getFourth() Returns the lower right child node.
QuadTreeNode[]	getNodes() Returns an array containing all nodes (if there are any).
QuadTreeNode	getParent() Returns the parent node of this node
QuadTreeNode	getSecond() Returns the upper right child node.
double	getSize() Returns the width of this node.
QuadTreeNode	getThird() Returns the lower left child node.
double	getX1()
double	getX2()
double	getY1()
double	getY2()
boolean	isLabeled() All nodes through which a line passes are labeled.
void	setLabel(boolean value) Use for you own purposes.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

QuadTreeNode

public QuadTreeNode(QuadTree quadTree,
                    double x1,
                    double y1,
                    double x2,
                    double y2,
                    QuadTreeNode parent,
                    List<List<Location>> subList)

Constructor for a tree node. Suitable only inside QuadTree code

Parameters:

quadTree - parent tree

x1 - upper left x coord

y1 - upper left y coord

x2 - lower right x coord

y2 - lower right y coord

parent - parent node

subList - list of lists of vertices that constitute a line crossing through this nodes rectangle

Method Detail

getX1

public final double getX1()

getX2

public final double getX2()

getY1

public final double getY1()

getY2

public final double getY2()

getCenter

public Location getCenter()

Retrieves a point [ (x1 + x2) / 2, (y1 + y2) / 2 ].

Returns:

center point of this node

getFirst

public final QuadTreeNode getFirst()

Returns the upper left child node. If it exists, otherwise throws an exception.

Returns:

upper left child node

getSecond

public final QuadTreeNode getSecond()

Returns the upper right child node. If it exists, otherwise throws an exception.

Returns:

upper right child node

getThird

public final QuadTreeNode getThird()

Returns the lower left child node. If it exists, otherwise throws an exception.

Returns:

lower left child node

getFourth

public final QuadTreeNode getFourth()

Returns the lower right child node. If it exists, otherwise throws an exception.

Returns:

lower right child node

getNodes

public final QuadTreeNode[] getNodes()

Returns an array containing all nodes (if there are any). Nodes are in the following order [ ul, ur, ll, lr ]

Returns:

array of child nodes

getParent

public final QuadTreeNode getParent()

Returns the parent node of this node

Returns:

parent node

toString

public String toString()

Overrides:

toString in class Object

isLabeled

public final boolean isLabeled()

All nodes through which a line passes are labeled. Other nodes can be labeled by user.

Returns:

is node labeled

setLabel

public final void setLabel(boolean value)

Use for you own purposes. Perhaps, you want to label the whole inside of the polygon?

Parameters:

value - set to true or false

getSize

public double getSize()

Returns the width of this node.

Returns:

width