prajna.geo

Class Orthographic

java.lang.Object

prajna.geo.Projection

prajna.geo.Orthographic

public class Orthographic
extends Projection

Projection class representing Orthographic projection

Author:

Edward Swing

Constructor Summary

Constructors

Constructor and Description
Orthographic() Constructor for default orthographic projection
Orthographic(GeoCoord center) Constructor for an orthographic projection centered on the specified center point

Method Summary

Methods

Modifier and Type	Method and Description
GeoCoord	getCoord(java.awt.Point point) Get the geographic coordinate which projects to the given screen coordinate.
java.awt.Shape	getWorldShape() Get the world shape for this projection.
java.awt.Point	project(GeoCoord coord) Project a geographic coordinate into screen coordinates
java.awt.Point[]	project(GeoCoord[] coords) Project a series of geographic coordinate into screen coordinates
protected void	rescale() Rescales the projection.

Methods inherited from class prajna.geo.Projection

getGeoBounds, getGeoid, getProjCenter, getViewBounds, setGeoBounds, setGeoid, setProjCenter, setViewBounds, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

Orthographic

public Orthographic()

Constructor for default orthographic projection

Orthographic

public Orthographic(GeoCoord center)

Constructor for an orthographic projection centered on the specified center point

Parameters:

center - Projection center point.

Method Detail

getCoord

public GeoCoord getCoord(java.awt.Point point)
                  throws ProjectionException

Get the geographic coordinate which projects to the given screen coordinate.

Specified by:

getCoord in class Projection

Parameters:

point - a point in screen coordinates

Returns:

the geographic coordinate

Throws:

ProjectionException - if the reverse projection cannot be performed

getWorldShape

public java.awt.Shape getWorldShape()

Get the world shape for this projection. This method determines the shape of the world extent, and returns the corresponding shape.

Specified by:

getWorldShape in class Projection

Returns:

the shape of the world extent.

project

public java.awt.Point project(GeoCoord coord)
                       throws ProjectionException

Project a geographic coordinate into screen coordinates

Specified by:

project in class Projection

Parameters:

coord - the geographic coordinate

Returns:

the screen coordinate

Throws:

ProjectionException - if the projection cannot be performed

project

public java.awt.Point[] project(GeoCoord[] coords)

Project a series of geographic coordinate into screen coordinates

Specified by:

project in class Projection

Parameters:

coords - the geographic coordinates

Returns:

the series of screen coordinates

rescale

protected void rescale()

Rescales the projection. This method is called whenever the extents are changed.

Specified by:

rescale in class Projection