gov.nasa.worldwind.geom

Class PolarPoint

java.lang.Object

gov.nasa.worldwind.geom.PolarPoint

public class PolarPoint
extends Object

Represents a point in space defined by a latitude, longitude and distance from the origin.

Instances of PolarPoint are immutable.

Field Summary

Fields

Modifier and Type	Field and Description
static PolarPoint	ZERO

Constructor Summary

Constructors

Constructor and Description
PolarPoint(Angle latitude, Angle longitude, double radius) Obtains a PolarPoint from two angles and a radius.

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object o)
static PolarPoint	fromCartesian(double x, double y, double z) Obtains a PolarPoint from cartesian coordinates.
static PolarPoint	fromCartesian(Vec4 cartesianPoint) Obtains a PolarPoint from a cartesian point.
static PolarPoint	fromDegrees(double latitude, double longitude, double radius) Obtains a PolarPoint from degrees and a radius.
static PolarPoint	fromRadians(double latitude, double longitude, double radius) Obtains a PolarPoint from radians and a radius.
Angle	getLatitude() Obtains the latitude of this polar point
Angle	getLongitude() Obtains the longitude of this polar point
double	getRadius() Obtains the radius of this polar point
int	hashCode()
Vec4	toCartesian() Obtains a cartesian point equivalent to this PolarPoint, except in cartesian space.
static Vec4	toCartesian(Angle latitude, Angle longitude, double radius) Obtains a cartesian point from a given latitude, longitude and distance from center.
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

ZERO

public static final PolarPoint ZERO

Constructor Detail

PolarPoint

public PolarPoint(Angle latitude,
                  Angle longitude,
                  double radius)

Obtains a PolarPoint from two angles and a radius.

Parameters:

latitude - the latitude

longitude - the longitude

radius - the distance from the center

Throws:

IllegalArgumentException - if latitude or longitude is null

Method Detail

equals

public boolean equals(Object o)

Overrides:

equals in class Object

fromCartesian

public static PolarPoint fromCartesian(double x,
                                       double y,
                                       double z)

Obtains a PolarPoint from cartesian coordinates.

Parameters:

x - the x coordinate of the cartesian point

y - the y coordinate of the cartesian point

z - the z coordinate of the cartesian point

Returns:

a polar point located at (x,y,z) in cartesian space

fromCartesian

public static PolarPoint fromCartesian(Vec4 cartesianPoint)

Obtains a PolarPoint from a cartesian point.

Parameters:

cartesianPoint - the point to convert

Returns:

the cartesian point expressed as a polar point

Throws:

IllegalArgumentException - if cartesianPoint is null

fromDegrees

public static PolarPoint fromDegrees(double latitude,
                                     double longitude,
                                     double radius)

Obtains a PolarPoint from degrees and a radius.

Parameters:

latitude - the latitude in degrees

longitude - the longitude in degrees

radius - the distance form the center

Returns:

a new PolarPoint

fromRadians

public static PolarPoint fromRadians(double latitude,
                                     double longitude,
                                     double radius)

Obtains a PolarPoint from radians and a radius.

Parameters:

latitude - the latitude in radians

longitude - the longitude in radians

radius - the distance form the center

Returns:

a new PolarPoint

getLatitude

public final Angle getLatitude()

Obtains the latitude of this polar point

Returns:

this polar point's latitude

getLongitude

public final Angle getLongitude()

Obtains the longitude of this polar point

Returns:

this polar point's longitude

getRadius

public final double getRadius()

Obtains the radius of this polar point

Returns:

the distance from this polar point to its origin

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toCartesian

public final Vec4 toCartesian()

Obtains a cartesian point equivalent to this PolarPoint, except in cartesian space.

Returns:

this polar point in cartesian coordinates

toCartesian

public static Vec4 toCartesian(Angle latitude,
                               Angle longitude,
                               double radius)

Obtains a cartesian point from a given latitude, longitude and distance from center. This method is equivalent to, but may perform faster than Vec4 p = new PolarPoint(latitude, longitude, radius).toCartesian()

Parameters:

latitude - the latitude

longitude - the longitude

radius - the distance from the origin

Returns:

a cartesian point from two angles and a radius

Throws:

IllegalArgumentException - if latitude or longitude is null

toString

public String toString()

Overrides:

toString in class Object