org.apache.lucene.geo3d

Class GeoSouthLatitudeZone

java.lang.Object

org.apache.lucene.geo3d.BasePlanetObject

org.apache.lucene.geo3d.GeoBaseShape

org.apache.lucene.geo3d.GeoBaseMembershipShape

org.apache.lucene.geo3d.GeoBaseBBox

org.apache.lucene.geo3d.GeoSouthLatitudeZone

All Implemented Interfaces:

GeoArea, GeoBBox, GeoMembershipShape, GeoOutsideDistance, GeoShape, GeoSizeable, Membership

public class GeoSouthLatitudeZone
extends GeoBaseBBox

This GeoBBox represents an area rectangle limited only in north latitude.

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 double	cosTopLat The cosine of the top latitude of the zone
protected GeoPoint[]	edgePoints Edge points; a reference to the topBoundaryPoint
protected GeoPoint	interiorPoint An interior point of the zone
protected static GeoPoint[]	planePoints Notable points for the plane (none)
protected GeoPoint	topBoundaryPoint A point on the top boundary
protected double	topLat The top latitude of the zone
protected SidedPlane	topPlane The top plane of the zone

Fields inherited from class org.apache.lucene.geo3d.GeoBaseBBox

ALL_INSIDE, NONE_INSIDE, SOME_INSIDE

Fields inherited from class org.apache.lucene.geo3d.BasePlanetObject

planetModel

Fields inherited from interface org.apache.lucene.geo3d.GeoArea

CONTAINS, DISJOINT, OVERLAPS, WITHIN

Constructor Summary

Constructors

Constructor and Description
GeoSouthLatitudeZone(PlanetModel planetModel, double topLat) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	equals(Object o)
GeoBBox	expand(double angle) Expand box by specified angle.
Bounds	getBounds(Bounds bounds) Compute longitude/latitude 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 path) Find the spatial relationship between a shape and the current geo area.
int	hashCode()
boolean	intersects(Plane p, 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.
protected double	outsideDistance(DistanceStyle distanceStyle, double x, double y, double z) Called by a computeOutsideDistance method if X/Y/Z is not within this shape.
String	toString()

Methods inherited from class org.apache.lucene.geo3d.GeoBaseBBox

isShapeInsideBBox

Methods inherited from class org.apache.lucene.geo3d.GeoBaseMembershipShape

computeOutsideDistance, computeOutsideDistance, isWithin

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.geo3d.GeoOutsideDistance

computeOutsideDistance, computeOutsideDistance

Methods inherited from interface org.apache.lucene.geo3d.Membership

isWithin

Field Detail

topLat

protected final double topLat

The top latitude of the zone

cosTopLat

protected final double cosTopLat

The cosine of the top latitude of the zone

topPlane

protected final SidedPlane topPlane

The top plane of the zone

interiorPoint

protected final GeoPoint interiorPoint

An interior point of the zone

planePoints

protected static final GeoPoint[] planePoints

Notable points for the plane (none)

topBoundaryPoint

protected final GeoPoint topBoundaryPoint

A point on the top boundary

edgePoints

protected final GeoPoint[] edgePoints

Edge points; a reference to the topBoundaryPoint

Constructor Detail

GeoSouthLatitudeZone

public GeoSouthLatitudeZone(PlanetModel planetModel,
                    double topLat)

Constructor.

Parameters:

planetModel - is the planet model.

topLat - is the top latitude of the zone.

Method Detail

expand

public GeoBBox expand(double angle)

Description copied from interface: GeoBBox

Expand box by specified angle.

Parameters:

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

Returns:

a new GeoBBox.

isWithin

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

Description copied from interface: Membership

Check if a point is within this shape.

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.

Returns:

the radius.

getCenter

public GeoPoint getCenter()

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

Returns:

the center.

getEdgePoints

public GeoPoint[] getEdgePoints()

Description copied from interface: GeoShape

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

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 p,
                 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.

Parameters:

p - 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 Bounds getBounds(Bounds bounds)

Compute longitude/latitude bounds for the shape.

Specified by:

getBounds in interface GeoShape

Overrides:

getBounds in class GeoBaseShape

Parameters:

bounds - is the optional input bounds object. If this is null, a bounds object will be created. Otherwise, the input object will be modified.

Returns:

a Bounds object describing the shape's bounds. If the bounds cannot be computed, then return a Bounds object with noLongitudeBound, noTopLatitudeBound, and noBottomLatitudeBound.

getRelationship

public int getRelationship(GeoShape path)

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. Note well: When a shape consists of multiple independent overlapping subshapes, it is sometimes impossible to determine the distinction between OVERLAPS and CONTAINS. In that case, OVERLAPS may be returned even though the proper result would in fact be CONTAINS. Code accordingly.

Parameters:

path - is the shape to consider.

Returns:

the relationship, from the perspective of the shape.

outsideDistance

protected double outsideDistance(DistanceStyle distanceStyle,
                     double x,
                     double y,
                     double z)

Description copied from class: GeoBaseMembershipShape

Called by a computeOutsideDistance method if X/Y/Z is not within this shape.

Specified by:

outsideDistance in class GeoBaseMembershipShape

equals

public boolean equals(Object o)

Overrides:

equals in class BasePlanetObject

hashCode

public int hashCode()

Overrides:

hashCode in class BasePlanetObject

toString

public String toString()

Overrides:

toString in class Object