org.geotools.geometry.iso.util.algorithm2D
Class PointLocator

Object
  PointLocator

public class PointLocator
extends Object

Computes the topological relationship (Location) of a single point to a Geometry. The algorithm obeys the SFS Boundary Determination Rule to determine whether the point lies on the boundary or not.

Notes:

• LinearRings do not enclose any area - points inside the ring are still in the EXTERIOR of the ring.

Instances of this class are not reentrant.

Constructor Summary

PointLocator()

Method Summary

boolean	intersects(Coordinate p, GeometryImpl geom) Convenience method to test a point for intersection with a Geometry
int	locate(Coordinate p, GeometryImpl geom) Computes the topological relationship (Location) of a single point to a Geometry.

Methods inherited from class Object

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

Constructor Detail

PointLocator

public PointLocator()

Method Detail

intersects

public boolean intersects(Coordinate p,
                          GeometryImpl geom)

Convenience method to test a point for intersection with a Geometry

Parameters:

p - the coordinate to test

geom - the Geometry to test

Returns:

true if the point is in the interior or boundary of the Geometry

locate

public int locate(Coordinate p,
                  GeometryImpl geom)

Computes the topological relationship (Location) of a single point to a Geometry. It handles both single-element and multi-element Geometries. The algorithm for multi-part Geometries takes into account the SFS Boundary Determination Rule.

Returns:

the Location of the point relative to the input Geometry