geos::algorithm::PointLocator Class Reference

Computes the topological relationship (Location) of a single point to a Geometry. More...

#include <PointLocator.h>

Public Member Functions
geom::Location	locate (const geom::CoordinateXY &p, const geom::Geometry *geom)
bool	intersects (const geom::CoordinateXY &p, const geom::Geometry *geom)

Detailed Description

Computes the topological relationship (Location) of a single point to a Geometry.

The algorithm obeys the SFS boundaryDetermination rule to correctly determine whether the point lies on the boundary or not.

Notes:

• instances of this class are not reentrant.
• LinearRing objects do not enclose any area (points inside the ring are still in the EXTERIOR of the ring.)

Member Function Documentation

intersects()

bool geos::algorithm::PointLocator::intersects ( const geom::CoordinateXY &  p, const geom::Geometry *  geom  )

inline

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

References geos::geom::EXTERIOR.

locate()

geom::Location geos::algorithm::PointLocator::locate	(	const geom::CoordinateXY &	p,
		const geom::Geometry *	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 Geometriestakes into account the SFS Boundary Determination rule.

Returns

the Location of the point relative to the input Geometry

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The documentation for this class was generated from the following file:

• PointLocator.h