GEOS  3.11.0rc0
RayCrossingCounter.h
1 /**********************************************************************
2  *
3  * GEOS - Geometry Engine Open Source
4  * http://geos.osgeo.org
5  *
6  * Copyright (C) 2006 Refractions Research Inc.
7  *
8  * This is free software; you can redistribute and/or modify it under
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10  * by the Free Software Foundation.
11  * See the COPYING file for more information.
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13  *
14  **********************************************************************
15  *
16  * Last port: algorithm/RayCrossingCounter.java rev. 1.2 (JTS-1.9)
17  *
18  **********************************************************************/
19 
20 #pragma once
21 
22 #include <geos/export.h>
23 #include <geos/geom/Location.h>
24 
25 #include <vector>
26 
27 // forward declarations
28 namespace geos {
29 namespace geom {
30 class Coordinate;
31 class CoordinateSequence;
32 }
33 }
34 
35 
36 namespace geos {
37 namespace algorithm {
38 
64 class GEOS_DLL RayCrossingCounter {
65 private:
66  const geom::Coordinate& point;
67 
68  int crossingCount;
69 
70  // true if the test point lies on an input segment
71  bool isPointOnSegment;
72 
73  // Declare type as noncopyable
74  RayCrossingCounter(const RayCrossingCounter& other) = delete;
75  RayCrossingCounter& operator=(const RayCrossingCounter& rhs) = delete;
76 
77 public:
88  const geom::CoordinateSequence& ring);
89 
92  const std::vector<const geom::Coordinate*>& ring);
93 
94  RayCrossingCounter(const geom::Coordinate& p_point)
95  : point(p_point),
96  crossingCount(0),
97  isPointOnSegment(false)
98  { }
99 
107  const geom::Coordinate& p2);
108 
118  bool
119  isOnSegment() const
120  {
121  return isPointOnSegment;
122  }
123 
135 
145  bool isPointInPolygon() const;
146 
147 };
148 
149 } // geos::algorithm
150 } // geos
Counts the number of segments crossed by a horizontal ray extending to the right from a given point,...
Definition: RayCrossingCounter.h:64
geom::Location getLocation() const
Gets the Location of the point relative to the ring, polygon or multipolygon from which the processed...
static geom::Location locatePointInRing(const geom::Coordinate &p, const std::vector< const geom::Coordinate * > &ring)
Semantically equal to the above, just different args encoding.
bool isPointInPolygon() const
Tests whether the point lies in or on the ring, polygon or multipolygon from which the processed segm...
static geom::Location locatePointInRing(const geom::Coordinate &p, const geom::CoordinateSequence &ring)
Determines the Location of a point in a ring.
bool isOnSegment() const
Reports whether the point lies exactly on one of the supplied segments.
Definition: RayCrossingCounter.h:119
void countSegment(const geom::Coordinate &p1, const geom::Coordinate &p2)
Counts a segment.
The internal representation of a list of coordinates inside a Geometry.
Definition: CoordinateSequence.h:44
Coordinate is the lightweight class used to store coordinates.
Definition: Coordinate.h:58
Location
Constants representing the location of a point relative to a geometry.
Definition: Location.h:32
Basic namespace for all GEOS functionalities.
Definition: Angle.h:25