GEOS  3.3.3
MCIndexNoder.h
1 /**********************************************************************
2  * $Id: MCIndexNoder.h 3255 2011-03-01 17:56:10Z mloskot $
3  *
4  * GEOS - Geometry Engine Open Source
5  * http://geos.refractions.net
6  *
7  * Copyright (C) 2006 Refractions Research 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: noding/MCIndexNoder.java rev. 1.6 (JTS-1.9)
17  *
18  **********************************************************************/
19 
20 #ifndef GEOS_NODING_MCINDEXNODER_H
21 #define GEOS_NODING_MCINDEXNODER_H
22 
23 #include <geos/export.h>
24 
25 #include <geos/inline.h>
26 
27 #include <geos/index/chain/MonotoneChainOverlapAction.h> // for inheritance
28 #include <geos/noding/SinglePassNoder.h> // for inheritance
29 #include <geos/index/strtree/STRtree.h> // for composition
30 #include <geos/util.h>
31 
32 #include <vector>
33 #include <iostream>
34 
35 #ifdef _MSC_VER
36 #pragma warning(push)
37 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
38 #endif
39 
40 // Forward declarations
41 namespace geos {
42  namespace geom {
43  class LineSegment;
44  }
45  namespace noding {
46  class SegmentString;
47  class SegmentIntersector;
48  }
49 }
50 
51 namespace geos {
52 namespace noding { // geos.noding
53 
64 class GEOS_DLL MCIndexNoder : public SinglePassNoder {
65 
66 private:
67  std::vector<index::chain::MonotoneChain*> monoChains;
69  int idCounter;
70  std::vector<SegmentString*>* nodedSegStrings;
71  // statistics
72  int nOverlaps;
73 
74  void intersectChains();
75 
76  void add(SegmentString* segStr);
77 
78 public:
79 
80  MCIndexNoder(SegmentIntersector *nSegInt=NULL)
81  :
82  SinglePassNoder(nSegInt),
83  idCounter(0),
84  nodedSegStrings(NULL),
85  nOverlaps(0)
86  {}
87 
88  ~MCIndexNoder();
89 
91  std::vector<index::chain::MonotoneChain*>& getMonotoneChains() { return monoChains; }
92 
93  index::SpatialIndex& getIndex();
94 
95  std::vector<SegmentString*>* getNodedSubstrings() const;
96 
97  void computeNodes(std::vector<SegmentString*>* inputSegmentStrings);
98 
99  class SegmentOverlapAction : public index::chain::MonotoneChainOverlapAction {
100  public:
101  SegmentOverlapAction(SegmentIntersector& newSi)
102  :
103  index::chain::MonotoneChainOverlapAction(),
104  si(newSi)
105  {}
106 
107  void overlap(index::chain::MonotoneChain& mc1, std::size_t start1,
108  index::chain::MonotoneChain& mc2, std::size_t start2);
109  private:
110  SegmentIntersector& si;
111 
112  // Declare type as noncopyable
113  SegmentOverlapAction(const SegmentOverlapAction& other);
114  SegmentOverlapAction& operator=(const SegmentOverlapAction& rhs);
115  };
116 
117 };
118 
119 } // namespace geos.noding
120 } // namespace geos
121 
122 #ifdef _MSC_VER
123 #pragma warning(pop)
124 #endif
125 
126 #ifdef GEOS_INLINE
127 # include <geos/noding/MCIndexNoder.inl>
128 #endif
129 
130 #endif // GEOS_NODING_MCINDEXNODER_H
131 
132 /**********************************************************************
133  * $Log$
134  * Revision 1.4 2006/03/24 09:52:41 strk
135  * USE_INLINE => GEOS_INLINE
136  *
137  * Revision 1.3 2006/03/22 18:12:31 strk
138  * indexChain.h header split.
139  *
140  * Revision 1.2 2006/03/14 12:55:56 strk
141  * Headers split: geomgraphindex.h, nodingSnapround.h
142  *
143  * Revision 1.1 2006/03/09 16:46:49 strk
144  * geos::geom namespace definition, first pass at headers split
145  *
146  **********************************************************************/
147 
An interface for classes which represent a sequence of contiguous line segments.
Definition: SegmentString.h:46
A query-only R-tree created using the Sort-Tile-Recursive (STR) algorithm. For two-dimensional spatia...
Definition: STRtree.h:63
Definition: MonotoneChainOverlapAction.h:45
Abstract class defines basic insertion and query operations supported by classes implementing spatial...
Definition: SpatialIndex.h:48
Definition: SinglePassNoder.h:51
Processes possible intersections detected by a Noder.
Definition: noding/SegmentIntersector.h:48
Monotone Chains are a way of partitioning the segments of a linestring to allow for fast searching of...
Definition: index/chain/MonotoneChain.h:86
Nodes a set of SegmentString using a index based on index::chain::MonotoneChain and a index::SpatialI...
Definition: MCIndexNoder.h:64
std::vector< index::chain::MonotoneChain * > & getMonotoneChains()
Return a reference to this instance's std::vector of MonotoneChains.
Definition: MCIndexNoder.h:91