Package gov.nasa.worldwind.globe

Class ProjectionWgs84

java.lang.Object

gov.nasa.worldwind.globe.ProjectionWgs84

All Implemented Interfaces:

GeographicProjection

public class ProjectionWgs84
extends java.lang.Object
implements GeographicProjection

Constructor Summary

Constructors

Constructor	Description
ProjectionWgs84()	Constructs a WGS 84 geographic projection.

Method Summary

Modifier and Type	Method	Description
Position	cartesianToGeographic(Globe globe, double x, double y, double z, Position result)	Converts a Cartesian point to a geographic position.
Matrix4	cartesianToLocalTransform(Globe globe, double x, double y, double z, Matrix4 result)
Vec3	geographicToCartesian(Globe globe, double latitude, double longitude, double altitude, Vec3 result)	Converts a geographic position to Cartesian coordinates.
float[]	geographicToCartesianBorder(Globe globe, Sector sector, int numLat, int numLon, float height, Vec3 origin, float[] result)
float[]	geographicToCartesianGrid(Globe globe, Sector sector, int numLat, int numLon, float[] height, float verticalExaggeration, Vec3 origin, float[] result, int offset, int rowStride)
Vec3	geographicToCartesianNormal(Globe globe, double latitude, double longitude, Vec3 result)
Matrix4	geographicToCartesianTransform(Globe globe, double latitude, double longitude, double altitude, Matrix4 result)
java.lang.String	getDisplayName()	This projection's display name.
boolean	intersect(Globe globe, Line line, Vec3 result)	Computes the first intersection of a specified globe and line.

Methods inherited from class java.lang.Object

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

Constructor Detail

ProjectionWgs84

public ProjectionWgs84()

Constructs a WGS 84 geographic projection.

Method Detail

getDisplayName

public java.lang.String getDisplayName()

Description copied from interface: GeographicProjection

This projection's display name.

Specified by:

getDisplayName in interface GeographicProjection

Returns:

the display name

geographicToCartesian

public Vec3 geographicToCartesian(Globe globe,
                                  double latitude,
                                  double longitude,
                                  double altitude,
                                  Vec3 result)

Description copied from interface: GeographicProjection

Converts a geographic position to Cartesian coordinates.

Specified by:

geographicToCartesian in interface GeographicProjection

Parameters:

globe - the globe this projection is applied to

latitude - the position's latitude in degrees

longitude - the position's longitude in degrees

altitude - the position's altitude in meters

result - a pre-allocated Vec3 in which to store the computed X, Y and Z Cartesian coordinates

Returns:

the result argument, set to the computed Cartesian coordinates

geographicToCartesianNormal

public Vec3 geographicToCartesianNormal(Globe globe,
                                        double latitude,
                                        double longitude,
                                        Vec3 result)

Specified by:

geographicToCartesianNormal in interface GeographicProjection

geographicToCartesianTransform

public Matrix4 geographicToCartesianTransform(Globe globe,
                                              double latitude,
                                              double longitude,
                                              double altitude,
                                              Matrix4 result)

Specified by:

geographicToCartesianTransform in interface GeographicProjection

geographicToCartesianGrid

public float[] geographicToCartesianGrid(Globe globe,
                                         Sector sector,
                                         int numLat,
                                         int numLon,
                                         float[] height,
                                         float verticalExaggeration,
                                         Vec3 origin,
                                         float[] result,
                                         int offset,
                                         int rowStride)

Specified by:

geographicToCartesianGrid in interface GeographicProjection

geographicToCartesianBorder

public float[] geographicToCartesianBorder(Globe globe,
                                           Sector sector,
                                           int numLat,
                                           int numLon,
                                           float height,
                                           Vec3 origin,
                                           float[] result)

Specified by:

geographicToCartesianBorder in interface GeographicProjection

cartesianToGeographic

public Position cartesianToGeographic(Globe globe,
                                      double x,
                                      double y,
                                      double z,
                                      Position result)

Description copied from interface: GeographicProjection

Converts a Cartesian point to a geographic position.

Specified by:

cartesianToGeographic in interface GeographicProjection

Parameters:

globe - Globe model

x - the Cartesian point's X component

y - the Cartesian point's Y component

z - the Cartesian point's Z component

result - a pre-allocated Position in which to store the computed geographic position

Returns:

the result argument, set to the computed geographic position

cartesianToLocalTransform

public Matrix4 cartesianToLocalTransform(Globe globe,
                                         double x,
                                         double y,
                                         double z,
                                         Matrix4 result)

Specified by:

cartesianToLocalTransform in interface GeographicProjection

intersect

public boolean intersect(Globe globe,
                         Line line,
                         Vec3 result)

Description copied from interface: GeographicProjection

Computes the first intersection of a specified globe and line. The line is interpreted as a ray; intersection points behind the line's origin are ignored.

Specified by:

intersect in interface GeographicProjection

Parameters:

globe - the globe this projection is applied to

line - the line to intersect with the globe

result - a pre-allocated Vec3 in which to return the computed point

Returns:

true if the ray intersects the globe, otherwise false