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MonotoneChainSelectAction.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/MonotoneChainSelectAction.java rev. 1.6 (JTS-1.10)
16 *
17 **********************************************************************/
18
19 #ifndef GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H
20 #define GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H
21
22 #include <geos/export.h>
23 #include <geos/geom/LineSegment.h> // composition
24 #include <geos/geom/Envelope.h> // composition
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 class GEOS_DLL MonotoneChainSelectAction {
46
47 protected:
48
49 geom::LineSegment selectedSegment;
50
51 public:
52
53 MonotoneChainSelectAction() {}
54
55 virtual ~MonotoneChainSelectAction() {}
56
58 virtual void select(MonotoneChain& mc, unsigned int start);
59
66 virtual void select(const geom::LineSegment& seg) = 0;
67
68 // these envelopes are used during the MonotoneChain search process
69 // should only be visible by classes in this package
70 geom::Envelope tempEnv1;
71 };
72
73
74 } // namespace geos::index::chain
75 } // namespace geos::index
76 } // namespace geos
77
78 #endif // GEOS_IDX_CHAIN_MONOTONECHAINSELECTACTION_H
79