prajna.geo

Class GeoConvexHull

java.lang.Object

java.awt.Polygon

prajna.geo.GeoConvexHull

All Implemented Interfaces:

java.awt.Shape, java.io.Serializable, Locatable, GeoShape

public class GeoConvexHull
extends java.awt.Polygon
implements GeoShape

Shape representing a geographic convex hull of a group of geographic coordinates. This class creates a convex hull based upon the coordinates provided. It also allows points to be added or removed, and updates the hull coordinates appropriately.

Author:

Edward Swing

See Also:

Serialized Form

Field Summary

Fields inherited from class java.awt.Polygon

bounds, npoints, xpoints, ypoints

Constructor Summary

Constructors

Constructor and Description
GeoConvexHull(GeoCoord[] coordinates) Create a geographic convex hull from a set of coordinates.

Method Summary

Methods

Modifier and Type	Method and Description
void	addCoord(GeoCoord coord) Add a coordinate to the set of points for the convex hull.
GeoCoord	getCenter() Get the center of the GeoConvexHull
DataRecord	getData() Gets the data record associated with this GeoConvexHull
GeoBounds	getGeoBounds() Get the geographic bounds for this shape.
GeoCoord[]	getGeoPoints() Returns the list of Geographic coordinates for this GeoConvexHull
double	getRadius() Get the radius for this GeoConvexHull
RenderStyle	getRenderStyle() Get the rendering style for this GeoConvexHull.
void	project(Projection proj) Projects the geographic coordinates into the given projection
void	removeCoord(GeoCoord coord) Remove a point from the convex hull.
void	setData(DataRecord rec) Sets the data record of this GeoPolygon.
void	setRenderStyle(RenderStyle style) Set the rendering style for this GeoPolygon.

Methods inherited from class java.awt.Polygon

addPoint, contains, contains, contains, contains, contains, contains, getBoundingBox, getBounds, getBounds2D, getPathIterator, getPathIterator, inside, intersects, intersects, invalidate, reset, translate

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.awt.Shape

contains, contains, contains, contains, getBounds, getBounds2D, getPathIterator, getPathIterator, intersects, intersects

Constructor Detail

GeoConvexHull

public GeoConvexHull(GeoCoord[] coordinates)

Create a geographic convex hull from a set of coordinates. The coordinates may be in any order.

Parameters:

coordinates - an array of geographic coordinates.

Method Detail

addCoord

public void addCoord(GeoCoord coord)

Add a coordinate to the set of points for the convex hull.

Parameters:

coord - the new coordinate

getCenter

public GeoCoord getCenter()

Get the center of the GeoConvexHull

Specified by:

getCenter in interface Locatable

Specified by:

getCenter in interface GeoShape

Returns:

the center of the GeoConvexHull

getData

public DataRecord getData()

Gets the data record associated with this GeoConvexHull

Specified by:

getData in interface GeoShape

Returns:

the data record associated with this GeoConvexHull

getGeoBounds

public GeoBounds getGeoBounds()

Get the geographic bounds for this shape.

Specified by:

getGeoBounds in interface GeoShape

Returns:

the geographic bounds for this shape

getGeoPoints

public GeoCoord[] getGeoPoints()

Returns the list of Geographic coordinates for this GeoConvexHull

Returns:

the list of Geographic coordinates for this GeoConvexHull

getRadius

public double getRadius()

Get the radius for this GeoConvexHull

Specified by:

getRadius in interface Locatable

Specified by:

getRadius in interface GeoShape

Returns:

the radius, in meters

getRenderStyle

public RenderStyle getRenderStyle()

Get the rendering style for this GeoConvexHull.

Specified by:

getRenderStyle in interface GeoShape

Returns:

the Rendering style

project

public void project(Projection proj)

Projects the geographic coordinates into the given projection

Specified by:

project in interface GeoShape

Parameters:

proj - the Projection for the conversion

removeCoord

public void removeCoord(GeoCoord coord)

Remove a point from the convex hull. This method regenerates the convex hull polygon only if the coordinate removed is part of the hull polygon. If it is an interior point, no regeneration is needed.

Parameters:

coord - the coordinate to remove

setData

public void setData(DataRecord rec)

Sets the data record of this GeoPolygon.

Specified by:

setData in interface GeoShape

Parameters:

rec - the data record associated with this GeoPolygon

setRenderStyle

public void setRenderStyle(RenderStyle style)

Set the rendering style for this GeoPolygon. Any fields specifically set for a GeoShape should override the layer's default style.

Specified by:

setRenderStyle in interface GeoShape

Parameters:

style - The rendering style