GEOS  3.8.0dev
Polygon.h
1 /**********************************************************************
2  *
3  * GEOS - Geometry Engine Open Source
4  * http://geos.osgeo.org
5  *
6  * Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
7  * Copyright (C) 2005 2006 Refractions Research Inc.
8  * Copyright (C) 2001-2002 Vivid Solutions Inc.
9  *
10  * This is free software; you can redistribute and/or modify it under
11  * the terms of the GNU Lesser General Public Licence as published
12  * by the Free Software Foundation.
13  * See the COPYING file for more information.
14  *
15  **********************************************************************
16  *
17  * Last port: geom/Polygon.java r320 (JTS-1.12)
18  *
19  **********************************************************************/
20 
21 #ifndef GEOS_GEOM_POLYGON_H
22 #define GEOS_GEOM_POLYGON_H
23 
24 #include <geos/export.h>
25 #include <string>
26 #include <vector>
27 #include <geos/geom/Geometry.h> // for inheritance
28 #include <geos/geom/Envelope.h> // for proper use of unique_ptr<>
29 #include <geos/geom/LinearRing.h>
30 #include <geos/geom/Dimension.h> // for Dimension::DimensionType
31 
32 #include <geos/inline.h>
33 
34 #include <memory> // for unique_ptr
35 
36 // Forward declarations
37 namespace geos {
38 namespace geom { // geos::geom
39 class Coordinate;
40 class CoordinateArraySequence;
41 class CoordinateSequenceFilter;
42 class LineString;
43 }
44 }
45 
46 namespace geos {
47 namespace geom { // geos::geom
48 
64 class GEOS_DLL Polygon: public Geometry {
65 
66 public:
67 
68  friend class GeometryFactory;
69 
71  typedef std::vector<const Polygon*> ConstVect;
72 
73  ~Polygon() override;
74 
81  std::unique_ptr<Geometry>
82  clone() const override
83  {
84  return std::unique_ptr<Geometry>(new Polygon(*this));
85  }
86 
87  std::unique_ptr<CoordinateSequence> getCoordinates() const override;
88 
89  size_t getNumPoints() const override;
90 
92  Dimension::DimensionType getDimension() const override;
93 
95  int getCoordinateDimension() const override;
96 
98  int getBoundaryDimension() const override;
99 
106  std::unique_ptr<Geometry> getBoundary() const override;
107 
108  bool isEmpty() const override;
109 
111  const LinearRing* getExteriorRing() const;
112 
114  size_t getNumInteriorRing() const;
115 
117  const LinearRing* getInteriorRingN(std::size_t n) const;
118 
119  std::string getGeometryType() const override;
120  GeometryTypeId getGeometryTypeId() const override;
121  bool equalsExact(const Geometry* other, double tolerance = 0) const override;
122  void apply_rw(const CoordinateFilter* filter) override;
123  void apply_ro(CoordinateFilter* filter) const override;
124  void apply_rw(GeometryFilter* filter) override;
125  void apply_ro(GeometryFilter* filter) const override;
126  void apply_rw(CoordinateSequenceFilter& filter) override;
127  void apply_ro(CoordinateSequenceFilter& filter) const override;
128  void apply_rw(GeometryComponentFilter* filter) override;
129  void apply_ro(GeometryComponentFilter* filter) const override;
130 
131  std::unique_ptr<Geometry> convexHull() const override;
132 
133  void normalize() override;
134 
135  std::unique_ptr<Geometry> reverse() const override;
136 
137  int compareToSameClass(const Geometry* p) const override; //was protected
138 
139  const Coordinate* getCoordinate() const override;
140 
141  double getArea() const override;
142 
144  double getLength() const override;
145 
146  bool isRectangle() const override;
147 
148 protected:
149 
150 
151  Polygon(const Polygon& p);
152 
171  Polygon(LinearRing* newShell, std::vector<LinearRing*>* newHoles,
172  const GeometryFactory* newFactory);
173 
174  Polygon(std::unique_ptr<LinearRing> && newShell,
175  const GeometryFactory& newFactory);
176 
177  Polygon(std::unique_ptr<LinearRing> && newShell,
178  std::vector<std::unique_ptr<LinearRing>> && newHoles,
179  const GeometryFactory& newFactory);
180 
181  std::unique_ptr<LinearRing> shell;
182 
183  std::vector<std::unique_ptr<LinearRing>> holes;
184 
185  Envelope::Ptr computeEnvelopeInternal() const override;
186 
187  int
188  getSortIndex() const override
189  {
190  return SORTINDEX_POLYGON;
191  };
192 
193 
194 private:
195 
196  void normalize(LinearRing* ring, bool clockwise);
197 };
198 
199 } // namespace geos::geom
200 } // namespace geos
201 
202 #endif // ndef GEOS_GEOM_POLYGON_H
Geometry classes support the concept of applying a Geometry filter to the Geometry.
Definition: GeometryFilter.h:47
std::unique_ptr< Geometry > clone() const override
Definition: Polygon.h:82
std::vector< const Polygon * > ConstVect
A vector of const Polygon pointers.
Definition: Polygon.h:71
Coordinate is the lightweight class used to store coordinates.
Definition: Coordinate.h:60
Interface for classes which provide operations that can be applied to the coordinates in a Coordinate...
Definition: CoordinateSequenceFilter.h:57
GeometryTypeId
Geometry types.
Definition: Geometry.h:75
Basic implementation of Geometry, constructed and destructed by GeometryFactory.
Definition: Geometry.h:188
Geometry classes support the concept of applying a coordinate filter to every coordinate in the Geome...
Definition: CoordinateFilter.h:43
Represents a linear polygon, which may include holes.
Definition: Polygon.h:64
Supplies a set of utility methods for building Geometry objects from CoordinateSequence or other Geom...
Definition: GeometryFactory.h:66
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25
Models an OGC SFS LinearRing. A LinearRing is a LineString which is both closed and simple...
Definition: LinearRing.h:54
DimensionType
Definition: Dimension.h:31
Definition: GeometryComponentFilter.h:43