GEOS  3.4.2
MonotoneChainBuilder.h
1 /**********************************************************************
2  *
3  * GEOS - Geometry Engine Open Source
4  * http://geos.osgeo.org
5  *
6  * Copyright (C) 2001-2002 Vivid Solutions Inc.
7  *
8  * This is free software; you can redistribute and/or modify it under
9  * the terms of the GNU Lesser General Public Licence as published
10  * by the Free Software Foundation.
11  * See the COPYING file for more information.
12  *
13  **********************************************************************
14  *
15  * Last port: index/chain/MonotoneChainBuilder.java r388 (JTS-1.12)
16  *
17  **********************************************************************/
18 
19 #ifndef GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
20 #define GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
21 
22 #include <geos/export.h>
23 #include <vector>
24 #include <cstddef>
25 
26 // Forward declarations
27 namespace geos {
28  namespace geom {
29  class CoordinateSequence;
30  }
31  namespace index {
32  namespace chain {
33  class MonotoneChain;
34  }
35  }
36 }
37 
38 namespace geos {
39 namespace index { // geos::index
40 namespace chain { // geos::index::chain
41 
48 class GEOS_DLL MonotoneChainBuilder {
49 
50 public:
51 
53 
59  static std::vector<MonotoneChain*>* getChains(
60  const geom::CoordinateSequence *pts,
61  void* context);
62 
68  static void getChains(const geom::CoordinateSequence *pts,
69  void* context,
70  std::vector<MonotoneChain*>& mcList);
71 
72  static std::vector<MonotoneChain*>* getChains(const geom::CoordinateSequence *pts)
73  {
74  return getChains(pts, NULL);
75  }
76 
84  static void getChainStartIndices(const geom::CoordinateSequence& pts,
85  std::vector<std::size_t>& startIndexList);
86 
87 private:
88 
100  static std::size_t findChainEnd(const geom::CoordinateSequence& pts,
101  std::size_t start);
102 };
103 
104 } // namespace geos::index::chain
105 } // namespace geos::index
106 } // namespace geos
107 
108 #endif // GEOS_IDX_CHAIN_MONOTONECHAINBUILDER_H
109 
Constructs MonotoneChains for sequences of Coordinates.
Definition: MonotoneChainBuilder.h:48
The internal representation of a list of coordinates inside a Geometry.
Definition: CoordinateSequence.h:59