com.mousebird.maply

Class Mbr

java.lang.Object

com.mousebird.maply.Mbr

public class Mbr
extends java.lang.Object

A simple Maply bounding box. The coordinates will be in a particular coordinate system, such as WGS84 geographic or spherical mercator, though we do not call that out here.

Field Summary

Fields

Modifier and Type	Field and Description
Point2d	ll Lower left corner of the bounding box.
Point2d	ur Upper right corner of the bounding box.

Constructor Summary

Constructors

Constructor and Description
Mbr() Construct the bounding box empty.
Mbr(Point2d inLL, Point2d inUR) Construct with the lower left and upper right coordinates.

Method Summary

Modifier and Type	Method and Description
void	addPoint(Point2d pt) Add a point to the bounding box, expanding the extents.
java.util.List<Point2d>	asPoints() Return a list of points corresponding to the corners of the MBR.
boolean	equals(java.lang.Object thatObj) Compare coordinate values.
void	expandByFraction(double bufferZone)
void	initialize() We don't create the points by default, but we may need them.
boolean	insideOrOnEdge(Point2d pt) Check if the given point lies inside the bounding box or one of the edges.
boolean	isValid() True if the bounding box has been set.
Point2d	middle() The center of the bounding box.
boolean	overlaps(Mbr that) Check if the given bounding boxes overlap.
Point2d	span() The span is just the upper right minus the lower left.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

ll

public Point2d ll

Lower left corner of the bounding box.

ur

public Point2d ur

Upper right corner of the bounding box.

Constructor Detail

Mbr

public Mbr()

Construct the bounding box empty.

Mbr

public Mbr(Point2d inLL,
           Point2d inUR)

Construct with the lower left and upper right coordinates.

Parameters:

inLL - Lower left corner of the bounding box.

inUR - Upper right corner of the bounding box.

Method Detail

initialize

public void initialize()

We don't create the points by default, but we may need them.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

equals

public boolean equals(java.lang.Object thatObj)

Compare coordinate values.

Overrides:

equals in class java.lang.Object

addPoint

public void addPoint(Point2d pt)

Add a point to the bounding box, expanding the extents.

Parameters:

pt - Point to expand the bounding box with.

span

public Point2d span()

The span is just the upper right minus the lower left.

middle

public Point2d middle()

The center of the bounding box.

expandByFraction

public void expandByFraction(double bufferZone)

insideOrOnEdge

public boolean insideOrOnEdge(Point2d pt)

Check if the given point lies inside the bounding box or one of the edges.

overlaps

public boolean overlaps(Mbr that)

Check if the given bounding boxes overlap.

asPoints

public java.util.List<Point2d> asPoints()

Return a list of points corresponding to the corners of the MBR.

isValid

public boolean isValid()

True if the bounding box has been set. False if it is uninitialized.