GEOS 3.9.1
PointLocator.h
1/**********************************************************************
2 *
3 * GEOS - Geometry Engine Open Source
4 * http://geos.osgeo.org
5 *
6 * Copyright (C) 2005-2011 Refractions Research Inc.
7 * Copyright (C) 2001-2002 Vivid Solutions Inc.
8 *
9 * This is free software; you can redistribute and/or modify it under
10 * the terms of the GNU Lesser General Public Licence as published
11 * by the Free Software Foundation.
12 * See the COPYING file for more information.
13 *
14 **********************************************************************
15 *
16 * Last port: algorithm/PointLocator.java 95fbe34b (JTS-1.15.2-SNAPSHOT)
17 *
18 **********************************************************************/
19
20#ifndef GEOS_ALGORITHM_POINTLOCATOR_H
21#define GEOS_ALGORITHM_POINTLOCATOR_H
22
23#include <geos/export.h>
24#include <geos/geom/Location.h> // for inlines
25
26// Forward declarations
27namespace geos {
28namespace geom {
29class Coordinate;
30class Geometry;
31class LinearRing;
32class LineString;
33class Polygon;
34class Point;
35}
36}
37
38namespace geos {
39namespace algorithm { // geos::algorithm
40
57class GEOS_DLL PointLocator {
58public:
59 PointLocator() {}
60 ~PointLocator() {}
61
71
80 bool
82 {
83 return locate(p, geom) != geom::Location::EXTERIOR;
84 }
85
86private:
87
88 bool isIn; // true if the point lies in or on any Geometry element
89
90 int numBoundaries; // the number of sub-elements whose boundaries the point lies in
91
92 void computeLocation(const geom::Coordinate& p, const geom::Geometry* geom);
93
94 void updateLocationInfo(geom::Location loc);
95
96 geom::Location locate(const geom::Coordinate& p, const geom::Point* pt);
97
98 geom::Location locate(const geom::Coordinate& p, const geom::LineString* l);
99
100 geom::Location locateInPolygonRing(const geom::Coordinate& p, const geom::LinearRing* ring);
101
102 geom::Location locate(const geom::Coordinate& p, const geom::Polygon* poly);
103
104};
105
106} // namespace geos::algorithm
107} // namespace geos
108
109
110#endif // GEOS_ALGORITHM_POINTLOCATOR_H
111
Computes the topological relationship (Location) of a single point to a Geometry.
Definition PointLocator.h:57
geom::Location locate(const geom::Coordinate &p, const geom::Geometry *geom)
bool intersects(const geom::Coordinate &p, const geom::Geometry *geom)
Definition PointLocator.h:81
Coordinate is the lightweight class used to store coordinates.
Definition Coordinate.h:60
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition Geometry.h:188
Definition LineString.h:68
Models an OGC SFS LinearRing. A LinearRing is a LineString which is both closed and simple.
Definition LinearRing.h:54
Definition Point.h:66
Represents a linear polygon, which may include holes.
Definition Polygon.h:64
Location
Constants representing the location of a point relative to a geometry.
Definition Location.h:34
Basic namespace for all GEOS functionalities.
Definition IndexedNestedRingTester.h:26