Public Member Functions | Static Public Member Functions | Protected Member Functions

geos::geom::prep::PreparedPolygonContains Class Reference

Computes the contains spatial relationship predicate for a PreparedPolygon relative to all other Geometry classes. More...

#include <PreparedPolygonContains.h>

Inheritance diagram for geos::geom::prep::PreparedPolygonContains:
geos::geom::prep::AbstractPreparedPolygonContains geos::geom::prep::PreparedPolygonPredicate

List of all members.

Public Member Functions

 PreparedPolygonContains (const PreparedPolygon *const prepPoly)
bool contains (const geom::Geometry *geom)

Static Public Member Functions

static bool contains (const PreparedPolygon *const prep, const geom::Geometry *geom)

Protected Member Functions

bool fullTopologicalPredicate (const geom::Geometry *geom)

Detailed Description

Computes the contains spatial relationship predicate for a PreparedPolygon relative to all other Geometry classes.

Uses short-circuit tests and indexing to improve performance.

It is not possible to short-circuit in all cases, in particular in the case where the test geometry touches the polygon linework. In this case full topology must be computed.

Author:
Martin Davis

Constructor & Destructor Documentation

geos::geom::prep::PreparedPolygonContains::PreparedPolygonContains ( const PreparedPolygon *const   prepPoly  ) 

Creates an instance of this operation.

Parameters:
prepPoly the PreparedPolygon to evaluate

Member Function Documentation

bool geos::geom::prep::PreparedPolygonContains::contains ( const geom::Geometry geom  )  [inline]

Tests whether this PreparedPolygon contains a given geometry.

Parameters:
geom the test geometry
Returns:
true if the test geometry is contained

References geos::geom::prep::AbstractPreparedPolygonContains::eval().

Referenced by contains().

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

Computes the contains predicate between a PreparedPolygon and a Geometry.

Parameters:
prep the prepared polygon
geom a test geometry
Returns:
true if the polygon contains the geometry

References contains().

bool geos::geom::prep::PreparedPolygonContains::fullTopologicalPredicate ( const geom::Geometry geom  )  [protected, virtual]

Computes the full topological contains predicate. Used when short-circuit tests are not conclusive.

Parameters:
geom the test geometry
Returns:
true if this prepared polygon contains the test geometry

Implements geos::geom::prep::AbstractPreparedPolygonContains.


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