GEOS  3.3.3
MonotoneChainSelectAction.h
1 /**********************************************************************
2  * $Id: MonotoneChainSelectAction.h 2556 2009-06-06 22:22:28Z strk $
3  *
4  * GEOS - Geometry Engine Open Source
5  * http://geos.refractions.net
6  *
7  * Copyright (C) 2001-2002 Vivid Solutions 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: index/chain/MonotoneChainSelectAction.java rev. 1.6 (JTS-1.10)
17  *
18  **********************************************************************/
19 
20 #ifndef GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H
21 #define GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H
22 
23 #include <geos/export.h>
24 #include <geos/geom/LineSegment.h> // composition
25 #include <geos/geom/Envelope.h> // composition
26 
27 
28 // Forward declarations
29 namespace geos {
30  namespace index {
31  namespace chain {
32  class MonotoneChain;
33  }
34  }
35 }
36 
37 namespace geos {
38 namespace index { // geos::index
39 namespace chain { // geos::index::chain
40 
46 class GEOS_DLL MonotoneChainSelectAction {
47 
48 protected:
49 
50  geom::LineSegment selectedSegment;
51 
52 public:
53 
55 
56  virtual ~MonotoneChainSelectAction() {}
57 
59  virtual void select(MonotoneChain& mc, unsigned int start);
60 
67  virtual void select(const geom::LineSegment& seg) = 0;
68 
69  // these envelopes are used during the MonotoneChain search process
70  // should only be visible by classes in this package
71  geom::Envelope tempEnv1;
72 };
73 
74 
75 } // namespace geos::index::chain
76 } // namespace geos::index
77 } // namespace geos
78 
79 #endif // GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H
80 
81 /**********************************************************************
82  * $Log$
83  * Revision 1.1 2006/03/22 18:12:31 strk
84  * indexChain.h header split.
85  *
86  **********************************************************************/
87