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quadtree/Key.h
1 /**********************************************************************
2 * $Id: Key.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) 2009 Sandro Santilli <strk@keybit.net>
8 * Copyright (C) 2006 Refractions Research Inc.
9 * Copyright (C) 2001-2002 Vivid Solutions Inc.
10 *
11 * This is free software; you can redistribute and/or modify it under
12 * the terms of the GNU Lesser General Public Licence as published
13 * by the Free Software Foundation.
14 * See the COPYING file for more information.
15 *
16 **********************************************************************
17 *
18 * Last port: index/quadtree/Key.java rev 1.8 (JTS-1.10)
19 *
20 **********************************************************************/
21
22 #ifndef GEOS_IDX_QUADTREE_KEY_H
23 #define GEOS_IDX_QUADTREE_KEY_H
24
25 #include <geos/export.h>
26 #include <geos/geom/Coordinate.h> // for composition
27 #include <geos/geom/Envelope.h> // for composition
28
29 // Forward declarations
30 // ...
31
32 namespace geos {
33 namespace index { // geos::index
34 namespace quadtree { // geos::index::quadtree
35
43 class GEOS_DLL Key {
44 public:
45
46 // Doesn't touch the Envelope, might as well be const
47 static int computeQuadLevel(const geom::Envelope& env);
48
49 // Reference to argument won't be used after construction
50 Key(const geom::Envelope& itemEnv);
51
52 // used to be virtual, but I don't see subclasses...
53 ~Key();
54
56 const geom::Coordinate& getPoint() const;
57
58 int getLevel() const;
59
61 const geom::Envelope& getEnvelope() const;
62
64 geom::Coordinate* getCentre() const;
65
70 void computeKey(const geom::Envelope& itemEnv);
71
72 private:
73 // the fields which make up the key
74
75 // Owned by this class
76 geom::Coordinate pt;
77
78 int level;
79
80 // auxiliary data which is derived from the key for use in computation
81 geom::Envelope env;
82
83 void computeKey(int level, const geom::Envelope& itemEnv);
84 };
85
86 } // namespace geos::index::quadtree
87 } // namespace geos::index
88 } // namespace geos
89
90 #endif // GEOS_IDX_QUADTREE_KEY_H
91
92 /**********************************************************************
93 * $Log$
94 * Revision 1.1 2006/03/22 12:22:50 strk
95 * indexQuadtree.h split
96 *
97 **********************************************************************/
98