geos::geom::prep::PreparedPolygonContainsProperly Class Reference

Computes the containsProperly spatial relationship predicate for PreparedPolygons relative to all other Geometry classes. More...

#include <PreparedPolygonContainsProperly.h>

Inheritance diagram for geos::geom::prep::PreparedPolygonContainsProperly:

List of all members.

Public Member Functions
	PreparedPolygonContainsProperly (const PreparedPolygon *const prep)
bool	containsProperly (const geom::Geometry *geom)
Static Public Member Functions
static bool	containsProperly (const PreparedPolygon *const prep, const geom::Geometry *geom)

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Detailed Description

Computes the containsProperly spatial relationship predicate for PreparedPolygons relative to all other Geometry classes.

Uses short-circuit tests and indexing to improve performance.

A Geometry A containsProperly another Geometry B iff all points of B are contained in the Interior of A. Equivalently, B is contained in A AND B does not intersect the Boundary of A.

The advantage to using this predicate is that it can be computed efficiently, with no need to compute topology at individual points. In a situation with many geometries intersecting the boundary of the target geometry, this can make a performance difference.

Author:

Martin Davis

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Constructor & Destructor Documentation

geos::geom::prep::PreparedPolygonContainsProperly::PreparedPolygonContainsProperly (  const PreparedPolygon *const   prep  )  [inline]

Creates an instance of this operation. Parameters: prepPoly  the PreparedPolygon to evaluate

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Member Function Documentation

bool geos::geom::prep::PreparedPolygonContainsProperly::containsProperly (  const geom::Geometry *  geom  )

Tests whether this PreparedPolygon containsProperly a given geometry. Parameters: geom  the test geometry Returns: true if the test geometry is contained properly

static bool geos::geom::prep::PreparedPolygonContainsProperly::containsProperly (  const PreparedPolygon *const   prep, const geom::Geometry *  geom )  [inline, static]

Computes the containsProperly predicate between a PreparedPolygon and a Geometry. Parameters: prep  the prepared polygon geom  a test geometry Returns: true if the polygon properly contains the geometry

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

• PreparedPolygonContainsProperly.h

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