GEOS
3.6.2
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00001 /********************************************************************** 00002 * 00003 * GEOS - Geometry Engine Open Source 00004 * http://geos.osgeo.org 00005 * 00006 * Copyright (C) 2005-2011 Refractions Research Inc. 00007 * Copyright (C) 2001-2002 Vivid Solutions Inc. 00008 * 00009 * This is free software; you can redistribute and/or modify it under 00010 * the terms of the GNU Lesser General Public Licence as published 00011 * by the Free Software Foundation. 00012 * See the COPYING file for more information. 00013 * 00014 ********************************************************************** 00015 * 00016 * Last port: algorithm/PointLocator.java r320 (JTS-1.12) 00017 * 00018 **********************************************************************/ 00019 00020 #ifndef GEOS_ALGORITHM_POINTLOCATOR_H 00021 #define GEOS_ALGORITHM_POINTLOCATOR_H 00022 00023 #include <geos/export.h> 00024 #include <geos/geom/Location.h> // for inlines 00025 00026 // Forward declarations 00027 namespace geos { 00028 namespace geom { 00029 class Coordinate; 00030 class Geometry; 00031 class LinearRing; 00032 class LineString; 00033 class Polygon; 00034 class Point; 00035 } 00036 } 00037 00038 namespace geos { 00039 namespace algorithm { // geos::algorithm 00040 00058 class GEOS_DLL PointLocator { 00059 public: 00060 PointLocator() {} 00061 ~PointLocator() {} 00062 00073 int locate(const geom::Coordinate& p, const geom::Geometry *geom); 00074 00083 bool intersects(const geom::Coordinate& p, const geom::Geometry *geom) { 00084 return locate(p, geom) != geom::Location::EXTERIOR; 00085 } 00086 00087 private: 00088 00089 bool isIn; // true if the point lies in or on any Geometry element 00090 00091 int numBoundaries; // the number of sub-elements whose boundaries the point lies in 00092 00093 void computeLocation(const geom::Coordinate& p, const geom::Geometry *geom); 00094 00095 void updateLocationInfo(int loc); 00096 00097 int locate(const geom::Coordinate& p, const geom::Point *pt); 00098 00099 int locate(const geom::Coordinate& p, const geom::LineString *l); 00100 00101 int locateInPolygonRing(const geom::Coordinate& p, const geom::LinearRing *ring); 00102 00103 int locate(const geom::Coordinate& p, const geom::Polygon *poly); 00104 00105 }; 00106 00107 } // namespace geos::algorithm 00108 } // namespace geos 00109 00110 00111 #endif // GEOS_ALGORITHM_POINTLOCATOR_H 00112