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gov.nasa.worldwind.geom
Class PolarPoint

java.lang.Object
  extended by 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
static PolarPoint ZERO
           
 
Constructor Summary
PolarPoint(Angle latitude, Angle longitude, double radius)
          Obtains a PolarPoint from two angles and a radius.
 
Method Summary
 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
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