org.jhotdraw.geom

Class QuadTree<T>

java.lang.Object

org.jhotdraw.geom.QuadTree<T>

All Implemented Interfaces:

java.io.Serializable

public class QuadTree<T>
extends java.lang.Object
implements java.io.Serializable

A QuadTree allows to quickly find an object on a two-dimensional space.

QuadTree recursively subdivides a space into four rectangles. Each node of a QuadTree subdivides the space covered by the rectangle of its parent node into four smaller rectangles covering the upper left, upper right, lower left and lower right quadrant of the parent rectangle.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
QuadTree() Creates a new instance.
QuadTree(java.awt.geom.Rectangle2D.Double bounds)

Method Summary

Modifier and Type	Method and Description
void	add(T o, java.awt.geom.Rectangle2D.Double bounds)
java.util.Collection<T>	findContains(java.awt.geom.Point2D.Double p)
java.util.Collection<T>	findInside(java.awt.geom.Rectangle2D.Double r)
java.util.Collection<T>	findIntersects(java.awt.geom.Rectangle2D.Double r)
java.util.Collection<T>	findIntersects(java.awt.geom.Rectangle2D r)
void	remove(T o)
void	reorganize()

Methods inherited from class java.lang.Object

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

Constructor Detail

QuadTree

public QuadTree()

Creates a new instance.

QuadTree

public QuadTree(java.awt.geom.Rectangle2D.Double bounds)

Method Detail

add

public void add(T o,
                java.awt.geom.Rectangle2D.Double bounds)

reorganize

public void reorganize()

remove

public void remove(T o)

findContains

public java.util.Collection<T> findContains(java.awt.geom.Point2D.Double p)

findIntersects

public java.util.Collection<T> findIntersects(java.awt.geom.Rectangle2D r)

findIntersects

public java.util.Collection<T> findIntersects(java.awt.geom.Rectangle2D.Double r)

findInside

public java.util.Collection<T> findInside(java.awt.geom.Rectangle2D.Double r)