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/*
* Copyright (c) 2010, 2011 Itiner.pl. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Itiner designates this
* particular file as subject to the "Classpath" exception as provided
* by Itiner in the LICENSE.txt file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package com.codename1.maps;
import java.util.Vector;
/**
* This class declares a bounding box of coordinates on the map.
*
* @author Roman Kamyk [email protected]
*/
public class BoundingBox {
private final Coord _southWest;
private final Coord _northEast;
/**
* Creates a bounding box around a coordinate with a given radius.
* @param c The coordinate at the center of the bounding box.
* @param rLat The latitude radius of the box (in degrees).
* @param rLng The longitude radius of the box (in degrees).
*/
public BoundingBox(Coord c, double rLat, double rLng) {
_southWest = new Coord(c.getLatitude() - rLat, c.getLongitude() - rLng);
_northEast = new Coord(c.getLatitude() + rLat, c.getLongitude() + rLng);
}
/**
* Constructor with 2 coordinates for south west and north east
*
* @param southWest coordinate
* @param northEast coordinate
*/
public BoundingBox(Coord southWest, Coord northEast) {
_southWest = southWest;
_northEast = northEast;
}
/**
* Gets the /south west coordinate
* @return
*/
public Coord getSouthWest() {
return _southWest;
}
/**
* Gets the north east coordinate
* @return
*/
public Coord getNorthEast() {
return _northEast;
}
/**
* {@inheritDoc}
*/
public String toString() {
return "SW: " + _southWest + " NE: " + _northEast;
}
/**
* @return The difference between SE and NW getLongitude in degrees.
*/
public double latitudeDifference() {
return _northEast.getLatitude() - _southWest.getLatitude();
}
/**
* @return The difference between SE and NW latitudes in degrees.
*/
public double longitudeDifference() {
return _northEast.getLongitude() - _southWest.getLongitude();
}
/**
* indicates if the given coordinate is inside the counding box
* @param cur coordinate to check
* @return true if the given coordinate is contained in the bounding box
*/
public boolean contains(Coord cur) {
double latitude = cur.getLatitude();
if (latitude > getNorthEast().getLatitude() || latitude < getSouthWest().getLatitude()) {
return false;
}
double longitude = cur.getLongitude();
if (longitude < getSouthWest().getLongitude() || longitude > getNorthEast().getLongitude()) {
return false;
}
return true;
}
/**
* {@inheritDoc}
*/
public boolean equals(Object other) {
if (!(other instanceof BoundingBox)) {
return false;
}
BoundingBox o = (BoundingBox) other;
return _southWest.equals(o._southWest) && _northEast.equals(o._northEast);
}
/**
* {@inheritDoc}
*/
public int hashCode() {
int hash = 5;
hash = 29 * hash + this._southWest.hashCode();
hash = 29 * hash + this._northEast.hashCode();
return hash;
}
/**
* create a smallest bounding box that contains all of the given coordinates
* @param coords given coordinates to create a wrapping bounding box.
* @return a bounding box that contains all of the coordinates
*/
public static BoundingBox create(Coord[] coords) {
if (coords.length <= 0) {
throw new RuntimeException("There must be at least 1 coordinate.");
}
double north = coords[0].getLatitude();
double south = coords[0].getLatitude();
double east = coords[0].getLongitude();
double west = coords[0].getLongitude();
boolean projected = true;
int clen = coords.length;
for (int i = 0; i < clen; i++) {
Coord c = coords[i];
projected = c.isProjected();
north = Math.max(north, c.getLatitude());
east = Math.max(east, c.getLongitude());
south = Math.min(south, c.getLatitude());
west = Math.min(west, c.getLongitude());
}
return new BoundingBox(new Coord(south, west, projected), new Coord(north, east, projected));
}
/**
/**
* create a smallest bounding box that contains all of the given coordinates
* @param coords given coordinates to create a wrapping bounding box.
* @return a bounding box that contains all of the coordinates
*/
public static BoundingBox create(Vector coords) {
int length = coords.size();
if (length <= 0) {
throw new RuntimeException("There must be at least 1 coordinate.");
}
Coord[] coordsArray = new Coord[length];
coords.copyInto(coordsArray);
return create(coordsArray);
}
/**
* create a new bounding box that extends this bounding box with the given
* bounding box
* @param other a bounding box that needs to extends the current bounding box
* @return a new bounding box that was extended from the current and the other
*/
public BoundingBox extend(BoundingBox other) {
double north = Math.max(getNorthEast().getLatitude(), other.getNorthEast().getLatitude());
double east = Math.max(getNorthEast().getLongitude(), other.getNorthEast().getLongitude());
double south = Math.min(getSouthWest().getLatitude(), other.getSouthWest().getLatitude());
double west = Math.min(getSouthWest().getLongitude(), other.getSouthWest().getLongitude());
return new BoundingBox(new Coord(south, west, projected()), new Coord(north, east, projected()));
}
/**
* Indicates if this bounding box is isProjected
* @return true if it's a isProjected bounding box
*/
public boolean projected() {
return _southWest.isProjected();
}
}
