org.apache.lucene.spatial3d.geom

Class GeoDegeneratePoint

java.lang.Object

org.apache.lucene.spatial3d.geom.Vector

org.apache.lucene.spatial3d.geom.GeoPoint

org.apache.lucene.spatial3d.geom.GeoDegeneratePoint

All Implemented Interfaces:

GeoArea, GeoBBox, GeoCircle, GeoDistance, GeoDistanceShape, GeoMembershipShape, GeoOutsideDistance, GeoShape, GeoSizeable, Membership

public class GeoDegeneratePoint
extends GeoPoint
implements GeoBBox, GeoCircle

This class represents a degenerate point bounding box. It is not a simple GeoPoint because we must have the latitude and longitude.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Field Summary

Fields

Modifier and Type	Field and Description
protected GeoPoint[]	edgePoints Edge point is an area containing just this
protected PlanetModel	planetModel Current planet model, since we don't extend BasePlanetObject

Fields inherited from class org.apache.lucene.spatial3d.geom.GeoPoint

latitude, longitude, magnitude

Fields inherited from class org.apache.lucene.spatial3d.geom.Vector

MINIMUM_RESOLUTION, MINIMUM_RESOLUTION_CUBED, MINIMUM_RESOLUTION_SQUARED, x, y, z

Fields inherited from interface org.apache.lucene.spatial3d.geom.GeoArea

CONTAINS, DISJOINT, OVERLAPS, WITHIN

Constructor Summary

Constructors

Constructor and Description
GeoDegeneratePoint(PlanetModel planetModel, double lat, double lon) Constructor.

Method Summary

Modifier and Type	Method and Description
double	computeDistance(DistanceStyle distanceStyle, double x, double y, double z) Compute this shape's internal "distance" to the GeoPoint.
double	computeOutsideDistance(DistanceStyle distanceStyle, double x, double y, double z) Compute this shape's distance to the GeoPoint.
double	computeOutsideDistance(DistanceStyle distanceStyle, GeoPoint point) Compute this shape's distance to the GeoPoint.
boolean	equals(Object o)
GeoBBox	expand(double angle) Expand box by specified angle.
void	getBounds(Bounds bounds) Compute bounds for the shape.
GeoPoint	getCenter() Returns the center of a circle into which the area will be inscribed.
GeoPoint[]	getEdgePoints() Return a sample point that is on the outside edge/boundary of the shape.
double	getRadius() Returns the radius of a circle into which the GeoSizeable area can be inscribed.
int	getRelationship(GeoShape shape) Find the spatial relationship between a shape and the current geo area.
boolean	intersects(Plane plane, GeoPoint[] notablePoints, Membership... bounds) Assess whether a plane, within the provided bounds, intersects with the shape.
boolean	isWithin(double x, double y, double z) Check if a point is within this shape.
boolean	isWithin(Vector point) Check if a point is within this shape.
String	toString()

Methods inherited from class org.apache.lucene.spatial3d.geom.GeoPoint

arcDistance, arcDistance, getLatitude, getLongitude, isIdentical, magnitude

Methods inherited from class org.apache.lucene.spatial3d.geom.Vector

computeDesiredEllipsoidMagnitude, computeDesiredEllipsoidMagnitude, dotProduct, dotProduct, hashCode, isWithin, linearDistance, linearDistance, linearDistanceSquared, linearDistanceSquared, magnitude, normalDistance, normalDistance, normalDistanceSquared, normalDistanceSquared, normalize, rotateXY, rotateXY, rotateXZ, rotateXZ, rotateZY, rotateZY, translate

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.spatial3d.geom.GeoDistance

computeDistance

Field Detail

planetModel

protected final PlanetModel planetModel

Current planet model, since we don't extend BasePlanetObject

edgePoints

protected final GeoPoint[] edgePoints

Edge point is an area containing just this

Constructor Detail

GeoDegeneratePoint

public GeoDegeneratePoint(PlanetModel planetModel,
                          double lat,
                          double lon)

Constructor.

Parameters:

planetModel - is the planet model to use.

lat - is the latitude.

lon - is the longitude.

Method Detail

expand

public GeoBBox expand(double angle)

Description copied from interface: GeoBBox

Expand box by specified angle.

Specified by:

expand in interface GeoBBox

Parameters:

angle - is the angle amount to expand the GeoBBox by.

Returns:

a new GeoBBox.

getEdgePoints

public GeoPoint[] getEdgePoints()

Description copied from interface: GeoShape

Return a sample point that is on the outside edge/boundary of the shape.

Specified by:

getEdgePoints in interface GeoShape

Returns:

samples of all edge points from distinct edge sections. Typically one point is returned, but zero or two are also possible.

intersects

public boolean intersects(Plane plane,
                          GeoPoint[] notablePoints,
                          Membership... bounds)

Description copied from interface: GeoShape

Assess whether a plane, within the provided bounds, intersects with the shape. Note well that this method is allowed to return "true" if there are internal edges of a composite shape which intersect the plane. Doing this can cause getRelationship() for most GeoBBox shapes to return OVERLAPS rather than the more correct CONTAINS, but that cannot be helped for some complex shapes that are built out of overlapping parts.

Specified by:

intersects in interface GeoShape

Parameters:

plane - is the plane to assess for intersection with the shape's edges or bounding curves.

notablePoints - represents the intersections of the plane with the supplied bounds. These are used to disambiguate when two planes are identical and it needs to be determined whether any points exist that fulfill all the bounds.

bounds - are a set of bounds that define an area that an intersection must be within in order to qualify (provided by a GeoArea).

Returns:

true if there's such an intersection, false if not.

getBounds

public void getBounds(Bounds bounds)

Description copied from interface: GeoShape

Compute bounds for the shape.

Specified by:

getBounds in interface GeoShape

Parameters:

bounds - is the input bounds object. The input object will be modified.

computeOutsideDistance

public double computeOutsideDistance(DistanceStyle distanceStyle,
                                     GeoPoint point)

Description copied from interface: GeoOutsideDistance

Compute this shape's distance to the GeoPoint. A return value of 0.0 should be returned for points inside of the shape.

Specified by:

computeOutsideDistance in interface GeoOutsideDistance

Parameters:

distanceStyle - is the distance style.

point - is the point to compute the distance to.

Returns:

the distance.

computeOutsideDistance

public double computeOutsideDistance(DistanceStyle distanceStyle,
                                     double x,
                                     double y,
                                     double z)

Description copied from interface: GeoOutsideDistance

Compute this shape's distance to the GeoPoint. A return value of 0.0 should be returned for points inside of the shape.

Specified by:

computeOutsideDistance in interface GeoOutsideDistance

Parameters:

distanceStyle - is the distance style.

x - is the point's unit x coordinate (using U.S. convention).

y - is the point's unit y coordinate (using U.S. convention).

z - is the point's unit z coordinate (using U.S. convention).

Returns:

the distance.

equals

public boolean equals(Object o)

Overrides:

equals in class Vector

toString

public String toString()

Overrides:

toString in class GeoPoint

isWithin

public boolean isWithin(Vector point)

Description copied from interface: Membership

Check if a point is within this shape.

Specified by:

isWithin in interface Membership

Parameters:

point - is the point to check.

Returns:

true if the point is within this shape

isWithin

public boolean isWithin(double x,
                        double y,
                        double z)

Description copied from interface: Membership

Check if a point is within this shape.

Specified by:

isWithin in interface Membership

Parameters:

x - is x coordinate of point to check.

y - is y coordinate of point to check.

z - is z coordinate of point to check.

Returns:

true if the point is within this shape

getRadius

public double getRadius()

Description copied from interface: GeoSizeable

Returns the radius of a circle into which the GeoSizeable area can be inscribed.

Specified by:

getRadius in interface GeoSizeable

Returns:

the radius.

getCenter

public GeoPoint getCenter()

Description copied from interface: GeoSizeable

Returns the center of a circle into which the area will be inscribed.

Specified by:

getCenter in interface GeoSizeable

Returns:

the center.

getRelationship

public int getRelationship(GeoShape shape)

Description copied from interface: GeoArea

Find the spatial relationship between a shape and the current geo area. Note: return value is how the GeoShape relates to the GeoArea, not the other way around. For example, if this GeoArea is entirely within the shape, then CONTAINS should be returned. If the shape is entirely enclosed by this GeoArea, then WITHIN should be returned. It is permissible to return OVERLAPS instead of WITHIN if the shape intersects with the area at even a single point. So, a circle inscribed in a rectangle could return either OVERLAPS or WITHIN, depending on implementation. It is not permissible to return CONTAINS or DISJOINT in this circumstance, however. Similarly, it is permissible to return OVERLAPS instead of CONTAINS under conditions where the shape consists of multiple independent overlapping subshapes, and the area overlaps one of the subshapes. It is not permissible to return WITHIN or DISJOINT in this circumstance, however.

Specified by:

getRelationship in interface GeoArea

Parameters:

shape - is the shape to consider.

Returns:

the relationship, from the perspective of the shape.

computeDistance

public double computeDistance(DistanceStyle distanceStyle,
                              double x,
                              double y,
                              double z)

Description copied from interface: GeoDistance

Compute this shape's internal "distance" to the GeoPoint. Implementations should clarify how this is computed when it's non-obvious. A return value of Double.MAX_VALUE should be returned for points outside of the shape.

Specified by:

computeDistance in interface GeoDistance

x - is the point's unit x coordinate (using U.S. convention).

y - is the point's unit y coordinate (using U.S. convention).

z - is the point's unit z coordinate (using U.S. convention).

Returns:

the distance.