261 lines
8.3 KiB
C
261 lines
8.3 KiB
C
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/**********************************************************************
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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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* Last port: geom/prep/PreparedGeometry.java rev. 1.11 (JTS-1.10)
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*
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**********************************************************************/
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#pragma once
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#include <vector>
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#include <memory>
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#include <string>
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#include <geos/export.h>
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// Forward declarations
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namespace geos {
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namespace geom {
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class Geometry;
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class Coordinate;
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class CoordinateSequence;
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class IntersectionMatrix;
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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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* \class PreparedGeometry
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*
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* \brief
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* An interface for classes which prepare {@link Geometry}s
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* in order to optimize the performance
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* of repeated calls to specific geometric operations.
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*
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* A given implementation may provide optimized implementations
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* for only some of the specified methods,
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* and delegate the remaining methods to the original {@link Geometry} operations.
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* An implementation may also only optimize certain situations,
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* and delegate others.
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* See the implementing classes for documentation about which methods and situations
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* they optimize.
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*
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*/
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class GEOS_DLL PreparedGeometry {
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public:
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virtual
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~PreparedGeometry() {}
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/** \brief
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* Gets the original {@link Geometry} which has been prepared.
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*
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* @return the base geometry
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*/
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virtual const geom::Geometry& getGeometry() const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} contains a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry contains the given Geometry
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*
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* @see Geometry#contains(Geometry)
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*/
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virtual bool contains(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} properly contains
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* a given geometry.
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*
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* The <code>containsProperly</code> predicate has the following
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* equivalent definitions:
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*
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* - Every point of the other geometry is a point of this
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* geometry's interior.
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* - The DE-9IM Intersection Matrix for the two geometries matches
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* <code>[T**FF*FF*]</code>
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*
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* In other words, if the test geometry has any interaction with
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* the boundary of the target
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* geometry the result of <tt>containsProperly</tt> is <tt>false</tt>.
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* This is different semantics to the {@link Geometry::contains}
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* predicate, in which test geometries can intersect the target's
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* boundary and still be contained.
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*
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* The advantage of using this predicate is that it can be computed
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* efficiently, since it avoids the need to compute the full
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* topological relationship of the input boundaries in cases where
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* they intersect.
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*
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* An example use case is computing the intersections
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* of a set of geometries with a large polygonal geometry.
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* Since <tt>intersection</tt> is a fairly slow operation, it can
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* be more efficient
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* to use <tt>containsProperly</tt> to filter out test geometries
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* which lie
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* wholly inside the area. In these cases the intersection is
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* known <i>a priori</i> to be exactly the original test geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry properly contains the given Geometry
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*
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* @see Geometry::contains
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*
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*/
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virtual bool containsProperly(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} is covered by a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry is covered by the given Geometry
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*
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* @see Geometry#coveredBy(Geometry)
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*/
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virtual bool coveredBy(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} covers a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry covers the given Geometry
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*
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* @see Geometry#covers(Geometry)
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*/
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virtual bool covers(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} crosses a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry crosses the given Geometry
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*
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* @see Geometry#crosses(Geometry)
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*/
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virtual bool crosses(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} is disjoint from a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry is disjoint from the given Geometry
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*
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* @see Geometry#disjoint(Geometry)
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*/
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virtual bool disjoint(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} intersects a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry intersects the given Geometry
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*
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* @see Geometry#intersects(Geometry)
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*/
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virtual bool intersects(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} overlaps a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry overlaps the given Geometry
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*
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* @see Geometry#overlaps(Geometry)
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*/
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virtual bool overlaps(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} touches a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry touches the given Geometry
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*
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* @see Geometry#touches(Geometry)
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*/
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virtual bool touches(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} is within a given geometry.
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*
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* @param geom the Geometry to test
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* @return true if this Geometry is within the given Geometry
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*
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* @see Geometry#within(Geometry)
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*/
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virtual bool within(const geom::Geometry* geom) const = 0;
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/** \brief
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* Compute the nearest locations on the base {@link Geometry} and
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* the given geometry.
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*
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* @param geom the Geometry to compute the nearest point to
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* @return true the nearest points
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*
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*/
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virtual std::unique_ptr<geom::CoordinateSequence> nearestPoints(const geom::Geometry* geom) const = 0;
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/** \brief
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* Compute the minimum distance between the base {@link Geometry} and
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* the given geometry.
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*
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* @param geom the Geometry to compute the distance to
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* @return the minimum distance between the two geometries
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*
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*/
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virtual double distance(const geom::Geometry* geom) const = 0;
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/** \brief
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* Tests whether the base {@link Geometry} is within a given
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* distance from the given geometry.
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*
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* @param geom the Geometry to test the distance to
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* @param dist the distance value to compare
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* @return true if this Geometry is within the given distance from
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* the given Geometry.
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*
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*/
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virtual bool isWithinDistance(const geom::Geometry* geom, double dist) const = 0;
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/** \brief
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* Compares the prepared geometry to the given geometry
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* and returns the DE9IM intersection matrix as a string.
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*
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* @param geom the Geometry to test the
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* @return the DE9IM matrix
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*/
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virtual std::unique_ptr<IntersectionMatrix> relate(const geom::Geometry* geom) const = 0;
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/** \brief
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* Compares the prepared geometry to the given geometry
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* and the provided DE9IM pattern, and returns true if the
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* pattern is consistent with the relationship between the
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* prepared and provided geometries.
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*
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* @param geom the Geometry to test the distance to
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* @param pat the DE9IM pattern
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* @return true if the patterns are consistent
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*/
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virtual bool relate(const geom::Geometry* geom, const std::string& pat) const = 0;
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};
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} // namespace geos::geom::prep
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} // namespace geos::geom
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} // namespace geos
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