GEOS: MCIndexSnapRounder.h Source File

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MCIndexSnapRounder.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/snapround/MCIndexSnapRounder.java r486 (JTS-1.12+)
16 *
17 **********************************************************************/
18
19 #ifndef GEOS_NODING_SNAPROUND_MCINDEXSNAPROUNDER_H
20 #define GEOS_NODING_SNAPROUND_MCINDEXSNAPROUNDER_H
21
22 #include <geos/export.h>
23
24 #include <geos/noding/Noder.h> // for inheritance
25 #include <geos/noding/NodedSegmentString.h> // for inlines
26 #include <geos/noding/snapround/MCIndexPointSnapper.h> // for inines
27 #include <geos/algorithm/LineIntersector.h> // for composition
28 #include <geos/geom/Coordinate.h> // for use in vector
29 #include <geos/geom/PrecisionModel.h> // for inlines
30
31 #include <vector>
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 algorithm {
41 class LineIntersector;
42 }
43 namespace noding {
44 class SegmentString;
45 class MCIndexNoder;
46 }
47 }
48
49 namespace geos {
50 namespace noding { // geos::noding
51 namespace snapround { // geos::noding::snapround
52
53
74 class GEOS_DLL MCIndexSnapRounder: public Noder { // implments Noder
75
76 public:
77
78 MCIndexSnapRounder(const geom::PrecisionModel& nPm)
79 :
80 pm(nPm),
81 scaleFactor(nPm.getScale()),
82 pointSnapper(0)
83 {
84 li.setPrecisionModel(&pm);
85 }
86
87 std::vector<SegmentString*>* getNodedSubstrings() const {
88 return NodedSegmentString::getNodedSubstrings(*nodedSegStrings);
89 }
90
91 void computeNodes(std::vector<SegmentString*>* segStrings);
92
101 void computeVertexSnaps(std::vector<SegmentString*>& edges);
102
103 private:
104
106 const geom::PrecisionModel& pm;
107
108 algorithm::LineIntersector li;
109
110 double scaleFactor;
111
112 std::vector<SegmentString*>* nodedSegStrings;
113
114 std::auto_ptr<MCIndexPointSnapper> pointSnapper;
115
116 void snapRound(MCIndexNoder& noder, std::vector<SegmentString*>* segStrings);
117
118
126 void findInteriorIntersections(MCIndexNoder& noder,
127 std::vector<SegmentString*>* segStrings,
128 std::vector<geom::Coordinate>& intersections);
129
134 void computeIntersectionSnaps(std::vector<geom::Coordinate>& snapPts);
135
140 void computeVertexSnaps(NodedSegmentString* e);
141
142 void checkCorrectness(std::vector<SegmentString*>& inputSegmentStrings);
143
144 // Declare type as noncopyable
145 MCIndexSnapRounder(const MCIndexSnapRounder& other);
146 MCIndexSnapRounder& operator=(const MCIndexSnapRounder& rhs);
147 };
148
149 } // namespace geos::noding::snapround
150 } // namespace geos::noding
151 } // namespace geos
152
153 #ifdef _MSC_VER
154 #pragma warning(pop)
155 #endif
156
157 #endif // GEOS_NODING_SNAPROUND_MCINDEXSNAPROUNDER_H
geos::noding::NodedSegmentString
Represents a list of contiguous line segments, and supports noding the segments.
Definition: NodedSegmentString.h:57
geos::geom::PrecisionModel
Specifies the precision model of the Coordinate in a Geometry.
Definition: PrecisionModel.h:87
geos::algorithm::LineIntersector
A LineIntersector is an algorithm that can both test whether two line segments intersect and compute ...
Definition: LineIntersector.h:49
geos::noding::snapround::MCIndexSnapRounder::getNodedSubstrings
std::vector< SegmentString * > * getNodedSubstrings() const
Returns a Collection of fully noded SegmentStrings. The SegmentStrings have the same context as their...
Definition: MCIndexSnapRounder.h:87
geos::noding::snapround::MCIndexSnapRounder
Uses Snap Rounding to compute a rounded, fully noded arrangement from a set of SegmentString.
Definition: MCIndexSnapRounder.h:74
geos
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25
geos::noding::Noder
Computes all intersections between segments in a set of SegmentString.
Definition: Noder.h:49
geos::noding::MCIndexNoder
Nodes a set of SegmentString using a index based on index::chain::MonotoneChain and a index::SpatialI...
Definition: MCIndexNoder.h:63
geos::geom::PrecisionModel::getScale
double getScale() const
Returns the multiplying factor used to obtain a precise coordinate.