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NodedSegmentString.h
1 /**********************************************************************
2 *
3 * GEOS - Geometry Engine Open Source
4 * http://geos.osgeo.org
5 *
6 * Copyright (C) 2011 Sandro Santilli <strk@keybit.net>
7 * Copyright (C) 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 *
18 * Last port: noding/NodedSegmentString.java r320 (JTS-1.12)
19 *
20 **********************************************************************/
21
22 #ifndef GEOS_NODING_NODEDSEGMENTSTRING_H
23 #define GEOS_NODING_NODEDSEGMENTSTRING_H
24
25 #include <geos/export.h>
26 #include <geos/noding/NodableSegmentString.h> // for inheritance
27 #include <geos/geom/CoordinateSequence.h> // for inlines
28 #include <geos/algorithm/LineIntersector.h>
29 #include <geos/noding/SegmentNode.h>
30 #include <geos/noding/SegmentNodeList.h>
31 #include <geos/noding/SegmentString.h>
32 //#include <geos/noding/Octant.h>
33 #include <geos/geom/Coordinate.h>
34
35 #include <cstddef>
36
37 #ifdef _MSC_VER
38 #pragma warning(push)
39 #pragma warning(disable: 4251 4355) // warning C4355: 'this' : used in base member initializer list
40 #endif
41
42 namespace geos {
43 namespace noding { // geos::noding
44
57 class GEOS_DLL NodedSegmentString : public NodableSegmentString
58 {
59 public:
60
61 // TODO: provide a templated method using an output iterator
62 template <class II>
63 static void getNodedSubstrings(II from, II too_far,
64 SegmentString::NonConstVect* resultEdgelist)
65 {
66 for (II i=from; i != too_far; ++i)
67 {
68 NodedSegmentString * nss = dynamic_cast<NodedSegmentString*>(*i);
69 assert(nss);
70 nss->getNodeList().addSplitEdges(resultEdgelist);
71 }
72 }
73
74 template <class C>
75 static void getNodedSubstrings(C *segStrings,
76 SegmentString::NonConstVect* resultEdgelist)
77 {
78 getNodedSubstrings(segStrings->begin(), segStrings->end(), resultEdgelist);
79 }
80
81 static void getNodedSubstrings(const SegmentString::NonConstVect& segStrings,
82 SegmentString::NonConstVect* resultEdgeList);
83
85 static SegmentString::NonConstVect* getNodedSubstrings(
86 const SegmentString::NonConstVect& segStrings);
87
88
98 NodedSegmentString(geom::CoordinateSequence *newPts, const void* newContext)
99 : NodableSegmentString(newContext)
100 , nodeList(this)
101 , pts(newPts)
102 {}
103
104 ~NodedSegmentString()
105 {
106 delete pts;
107 }
108
118 SegmentNode* addIntersectionNode( geom::Coordinate * intPt, std::size_t segmentIndex)
119 {
120 std::size_t normalizedSegmentIndex = segmentIndex;
121
122 // normalize the intersection point location
123 std::size_t nextSegIndex = normalizedSegmentIndex + 1;
124 if (nextSegIndex < size())
125 {
126 geom::Coordinate const& nextPt =
127 getCoordinate(static_cast<unsigned int>(nextSegIndex));
128
129 // Normalize segment index if intPt falls on vertex
130 // The check for point equality is 2D only - Z values are ignored
131 if ( intPt->equals2D( nextPt ))
132 {
133 normalizedSegmentIndex = nextSegIndex;
134 }
135 }
136
137 // Add the intersection point to edge intersection list.
138 SegmentNode * ei = getNodeList().add( *intPt, normalizedSegmentIndex);
139 return ei;
140 }
141
142 SegmentNodeList& getNodeList();
143
144 const SegmentNodeList& getNodeList() const;
145
146 virtual unsigned int size() const
147 {
148 return static_cast<unsigned int>(pts->size());
149 }
150
151 virtual const geom::Coordinate& getCoordinate(unsigned int i) const;
152
153 virtual geom::CoordinateSequence* getCoordinates() const;
154
155 virtual bool isClosed() const;
156
157 virtual std::ostream& print(std::ostream& os) const;
158
159
167 int getSegmentOctant(unsigned int index) const;
168
174 void addIntersections(algorithm::LineIntersector *li,
175 unsigned int segmentIndex, int geomIndex);
176
184 void addIntersection(algorithm::LineIntersector *li,
185 unsigned int segmentIndex,
186 int geomIndex, int intIndex);
187
195 void addIntersection(const geom::Coordinate& intPt,
196 unsigned int segmentIndex);
197
198
199 private:
200
201 SegmentNodeList nodeList;
202
203 geom::CoordinateSequence *pts;
204
205 static int safeOctant(const geom::Coordinate& p0, const geom::Coordinate& p1);
206
207 };
208
209 } // namespace geos::noding
210 } // namespace geos
211
212 #ifdef _MSC_VER
213 #pragma warning(pop)
214 #endif
215
216 #endif // GEOS_NODING_NODEDSEGMENTSTRING_H