GEOS  3.3.3
index/quadtree/Node.h
1 /**********************************************************************
2  * $Id: Node.h 3255 2011-03-01 17:56:10Z mloskot $
3  *
4  * GEOS - Geometry Engine Open Source
5  * http://geos.refractions.net
6  *
7  * Copyright (C) 2006 Refractions Research 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/quadtree/Node.java rev 1.8 (JTS-1.10)
17  *
18  **********************************************************************/
19 
20 #ifndef GEOS_IDX_QUADTREE_NODE_H
21 #define GEOS_IDX_QUADTREE_NODE_H
22 
23 #include <geos/export.h>
24 #include <geos/index/quadtree/NodeBase.h> // for inheritance
25 #include <geos/geom/Coordinate.h> // for composition
26 #include <geos/geom/Envelope.h> // for inline
27 
28 #include <string>
29 #include <memory>
30 
31 #ifdef _MSC_VER
32 #pragma warning(push)
33 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
34 #endif
35 
36 // Forward declarations
37 namespace geos {
38  namespace geom {
39  //class Coordinate;
40  class Envelope;
41  }
42 }
43 
44 namespace geos {
45 namespace index { // geos::index
46 namespace quadtree { // geos::index::quadtree
47 
56 class GEOS_DLL Node: public NodeBase {
57 
58 private:
59 
61  std::auto_ptr<geom::Envelope> env;
62 
63  geom::Coordinate centre;
64 
65  int level;
66 
73  Node* getSubnode(int index);
74 
75  std::auto_ptr<Node> createSubnode(int index);
76 
77 protected:
78 
79  bool isSearchMatch(const geom::Envelope& searchEnv) const {
80  return env->intersects(searchEnv);
81  }
82 
83 public:
84 
85  // Create a node computing level from given envelope
86  static std::auto_ptr<Node> createNode(const geom::Envelope& env);
87 
89  //
93  static std::auto_ptr<Node> createExpanded(std::auto_ptr<Node> node,
94  const geom::Envelope& addEnv);
95 
96  Node(std::auto_ptr<geom::Envelope> nenv, int nlevel)
97  :
98  env(nenv),
99  centre((env->getMinX()+env->getMaxX())/2,
100  (env->getMinY()+env->getMaxY())/2),
101  level(nlevel)
102  {
103  }
104 
105  virtual ~Node() {}
106 
109  geom::Envelope* getEnvelope() { return env.get(); }
110 
116  Node* getNode(const geom::Envelope *searchEnv);
117 
122  NodeBase* find(const geom::Envelope *searchEnv);
123 
124  void insertNode(std::auto_ptr<Node> node);
125 
126  std::string toString() const;
127 
128 };
129 
130 } // namespace geos::index::quadtree
131 } // namespace geos::index
132 } // namespace geos
133 
134 #ifdef _MSC_VER
135 #pragma warning(pop)
136 #endif
137 
138 #endif // GEOS_IDX_QUADTREE_NODE_H
139 
140 /**********************************************************************
141  * $Log$
142  * Revision 1.1 2006/03/22 12:22:50 strk
143  * indexQuadtree.h split
144  *
145  **********************************************************************/
146