GEOS  3.6.1
SegmentNodeList.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
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: noding/SegmentNodeList.java rev. 1.8 (JTS-1.10)
16  *
17  **********************************************************************/
18 
19 #ifndef GEOS_NODING_SEGMENTNODELIST_H
20 #define GEOS_NODING_SEGMENTNODELIST_H
21 
22 #include <geos/export.h>
23 
24 #include <geos/inline.h>
25 
26 #include <cassert>
27 #include <iostream>
28 #include <vector>
29 #include <set>
30 
31 #include <geos/noding/SegmentNode.h> // for composition
32 
33 #ifdef _MSC_VER
34 #pragma warning(push)
35 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
36 #endif
37 
38 // Forward declarations
39 namespace geos {
40  namespace geom {
41  class CoordinateSequence;
42  }
43  namespace noding {
44  class SegmentString;
45  class NodedSegmentString;
46  }
47 }
48 
49 namespace geos {
50 namespace noding { // geos::noding
51 
56 class GEOS_DLL SegmentNodeList {
57 private:
58  std::set<SegmentNode*,SegmentNodeLT> nodeMap;
59 
60  // the parent edge
61  const NodedSegmentString& edge;
62 
69  void checkSplitEdgesCorrectness(std::vector<SegmentString*>& splitEdges);
70 
79  SegmentString* createSplitEdge(SegmentNode *ei0, SegmentNode *ei1);
80 
89  void addCollapsedNodes();
90 
95  void findCollapsesFromExistingVertices(
96  std::vector<std::size_t>& collapsedVertexIndexes);
97 
105  void findCollapsesFromInsertedNodes(
106  std::vector<std::size_t>& collapsedVertexIndexes);
107 
108  bool findCollapseIndex(SegmentNode& ei0, SegmentNode& ei1,
109  size_t& collapsedVertexIndex);
110 
111  // Declare type as noncopyable
112  SegmentNodeList(const SegmentNodeList& other);
113  SegmentNodeList& operator=(const SegmentNodeList& rhs);
114 
115 public:
116 
117  friend std::ostream& operator<< (std::ostream& os, const SegmentNodeList& l);
118 
119  typedef std::set<SegmentNode*,SegmentNodeLT> container;
120  typedef container::iterator iterator;
121  typedef container::const_iterator const_iterator;
122 
123  SegmentNodeList(const NodedSegmentString* newEdge): edge(*newEdge) {}
124 
125  SegmentNodeList(const NodedSegmentString& newEdge): edge(newEdge) {}
126 
127  const NodedSegmentString& getEdge() const { return edge; }
128 
129  // TODO: Is this a final class ?
130  // Should remove the virtual in that case
131  virtual ~SegmentNodeList();
132 
143  SegmentNode* add(const geom::Coordinate& intPt, std::size_t segmentIndex);
144 
145  SegmentNode* add(const geom::Coordinate *intPt, std::size_t segmentIndex) {
146  return add(*intPt, segmentIndex);
147  }
148 
149  /*
150  * returns the set of SegmentNodes
151  */
152  //replaces iterator()
153  // TODO: obsolete this function
154  std::set<SegmentNode*,SegmentNodeLT>* getNodes() { return &nodeMap; }
155 
157  size_t size() const { return nodeMap.size(); }
158 
159  container::iterator begin() { return nodeMap.begin(); }
160  container::const_iterator begin() const { return nodeMap.begin(); }
161  container::iterator end() { return nodeMap.end(); }
162  container::const_iterator end() const { return nodeMap.end(); }
163 
167  void addEndpoints();
168 
175  void addSplitEdges(std::vector<SegmentString*>& edgeList);
176 
177  void addSplitEdges(std::vector<SegmentString*>* edgeList) {
178  assert(edgeList);
179  addSplitEdges(*edgeList);
180  }
181 
182  //string print();
183 };
184 
185 std::ostream& operator<< (std::ostream& os, const SegmentNodeList& l);
186 
187 } // namespace geos::noding
188 } // namespace geos
189 
190 #ifdef _MSC_VER
191 #pragma warning(pop)
192 #endif
193 
194 #endif
Coordinate is the lightweight class used to store coordinates.
Definition: Coordinate.h:60
An interface for classes which represent a sequence of contiguous line segments.
Definition: SegmentString.h:46
Represents a list of contiguous line segments, and supports noding the segments.
Definition: NodedSegmentString.h:57
size_t size() const
Return the number of nodes in this list.
Definition: SegmentNodeList.h:157
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25
A list of the SegmentNode present along a NodedSegmentString.
Definition: SegmentNodeList.h:56
Represents an intersection point between two NodedSegmentString.
Definition: SegmentNode.h:45