GEOS  3.6.1
MonotoneChainOverlapAction.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/MonotoneChainOverlapAction.java rev. 1.6 (JTS-1.10)
16  *
17  **********************************************************************/
18 
19 #ifndef GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H
20 #define GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H
21 
22 #include <geos/export.h>
23 #include <geos/geom/LineSegment.h>
24 #include <geos/geom/Envelope.h>
25 
26 
27 // Forward declarations
28 namespace geos {
29  namespace index {
30  namespace chain {
31  class MonotoneChain;
32  }
33  }
34 }
35 
36 namespace geos {
37 namespace index { // geos::index
38 namespace chain { // geos::index::chain
39 
45 
46 protected:
47 
48  geom::LineSegment overlapSeg1;
49 
50  geom::LineSegment overlapSeg2;
51 
52 public:
53 
55 
56  virtual ~MonotoneChainOverlapAction() {}
57 
66  virtual void overlap(MonotoneChain& mc1, std::size_t start1,
67  MonotoneChain& mc2, std::size_t start2);
68 
75  virtual void overlap(const geom::LineSegment& /*seg1*/,
76  const geom::LineSegment& /*seg2*/)
77  {}
78 
79  // these envelopes are used during the MonotoneChain search process
80  geom::Envelope tempEnv1;
81  geom::Envelope tempEnv2;
82 };
83 
84 } // namespace geos::index::chain
85 } // namespace geos::index
86 } // namespace geos
87 
88 #endif // GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H
89 
Definition: LineSegment.h:57
An Envelope defines a rectangulare region of the 2D coordinate plane.
Definition: Envelope.h:53
Definition: MonotoneChainOverlapAction.h:44
Basic namespace for all GEOS functionalities.
Definition: IndexedNestedRingTester.h:25
Monotone Chains are a way of partitioning the segments of a linestring to allow for fast searching of...
Definition: index/chain/MonotoneChain.h:85
virtual void overlap(const geom::LineSegment &, const geom::LineSegment &)
Definition: MonotoneChainOverlapAction.h:75