102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2006 Refractions Research Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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*
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**********************************************************************
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*
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* Last port: geom/prep/PreparedPolygonContainsProperly.java rev 1.5 (JTS-1.10)
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* (2007-12-12)
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*
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**********************************************************************/
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#pragma once
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#include <geos/geom/prep/PreparedPolygonPredicate.h> // inherited
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namespace geos {
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namespace geom {
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class Geometry;
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namespace prep {
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class PreparedPolygon;
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}
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}
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}
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namespace geos {
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namespace geom { // geos::geom
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namespace prep { // geos::geom::prep
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/**
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* \brief
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* Computes the <tt>containsProperly</tt> spatial relationship predicate
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* for {@link PreparedPolygon}s relative to all other {@link Geometry} classes.
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*
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* Uses short-circuit tests and indexing to improve performance.
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*
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* A Geometry A <tt>containsProperly</tt> another Geometry B iff
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* all points of B are contained in the Interior of A.
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* Equivalently, B is contained in A AND B does not intersect
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* the Boundary of A.
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*
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* The advantage to using this predicate is that it can be computed
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* efficiently, with no need to compute topology at individual points.
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* In a situation with many geometries intersecting the boundary
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* of the target geometry, this can make a performance difference.
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*
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* @author Martin Davis
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*/
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class PreparedPolygonContainsProperly : public PreparedPolygonPredicate {
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private:
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protected:
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public:
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/** \brief
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* Computes the <tt>containsProperly</tt> predicate between a {@link PreparedPolygon}
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* and a {@link Geometry}.
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*
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* @param prep the prepared polygon
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* @param geom a test geometry
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* @return true if the polygon properly contains the geometry
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*/
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static
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bool
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containsProperly(const PreparedPolygon* const prep, const geom::Geometry* geom)
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{
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PreparedPolygonContainsProperly polyInt(prep);
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return polyInt.containsProperly(geom);
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}
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/** \brief
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* Creates an instance of this operation.
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*
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* @param prep the PreparedPolygon to evaluate
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*/
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PreparedPolygonContainsProperly(const PreparedPolygon* const prep)
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: PreparedPolygonPredicate(prep)
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{ }
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/** \brief
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* Tests whether this PreparedPolygon containsProperly a given geometry.
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*
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* @param geom the test geometry
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* @return true if the test geometry is contained properly
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*/
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bool
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containsProperly(const geom::Geometry* geom);
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};
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} // geos::geom::prep
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} // geos::geom
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} // geos
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