Public Member Functions | Static Public Member Functions

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:
geos::geom::prep::PreparedPolygonPredicate

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)

Detailed Description

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

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

Constructor & Destructor Documentation

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

Creates an instance of this operation.

Parameters:
prepPolythe PreparedPolygon to evaluate

Member Function Documentation

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:
prepthe prepared polygon
geoma test geometry
Returns:
true if the polygon properly contains the geometry

References containsProperly().

Referenced by containsProperly().

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

Tests whether this PreparedPolygon containsProperly a given geometry.

Parameters:
geomthe test geometry
Returns:
true if the test geometry is contained properly

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