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Quadtree.h

00001 /**********************************************************************
00002  * $Id: Quadtree.h 2556 2009-06-06 22:22:28Z strk $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 2006 Refractions Research Inc.
00008  *
00009  * This is free software; you can redistribute and/or modify it under
00010  * the terms of the GNU Lesser General Public Licence as published
00011  * by the Free Software Foundation. 
00012  * See the COPYING file for more information.
00013  *
00014  **********************************************************************
00015  *
00016  * Last port: index/quadtree/Quadtree.java rev. 1.16 (JTS-1.10)
00017  *
00018  **********************************************************************/
00019 
00020 #ifndef GEOS_IDX_QUADTREE_QUADTREE_H
00021 #define GEOS_IDX_QUADTREE_QUADTREE_H
00022 
00023 #include <geos/export.h>
00024 #include <geos/index/SpatialIndex.h> // for inheritance
00025 #include <geos/index/quadtree/Root.h> // for composition
00026 
00027 #include <vector>
00028 #include <string>
00029 
00030 // Forward declarations
00031 namespace geos {
00032         namespace geom {
00033                 class Envelope;
00034         }
00035         namespace index {
00036                 namespace quadtree {
00037                         // class Root; 
00038                 }
00039         }
00040 }
00041 
00042 namespace geos {
00043 namespace index { // geos::index
00044 namespace quadtree { // geos::index::quadtree
00045 
00068 class GEOS_DLL Quadtree: public SpatialIndex {
00069 
00070 private:
00071 
00072         std::vector<geom::Envelope *> newEnvelopes;
00073 
00074         void collectStats(const geom::Envelope& itemEnv);
00075 
00076         Root root;
00077 
00089         double minExtent;
00090 
00091 public:
00099         static geom::Envelope* ensureExtent(const geom::Envelope *itemEnv,
00100                         double minExtent);
00101 
00106         Quadtree()
00107                 :
00108                 root(),
00109                 minExtent(1.0)
00110         {}
00111 
00112         ~Quadtree();
00113 
00115         int depth();
00116 
00118         int size();
00119         
00120         void insert(const geom::Envelope *itemEnv, void *item);
00121 
00139         void query(const geom::Envelope *searchEnv, std::vector<void*>& ret);
00140 
00141 
00158         void query(const geom::Envelope *searchEnv, ItemVisitor& visitor)
00159         {
00160                 /*
00161                  * the items that are matched are the items in quads which
00162                  * overlap the search envelope
00163                  */
00164                 root.visit(searchEnv, visitor);
00165         }
00166 
00174         bool remove(const geom::Envelope* itemEnv, void* item);
00175 
00177         std::vector<void*>* queryAll();
00178 
00179         std::string toString() const;
00180 
00181 };
00182 
00183 
00184 } // namespace geos::index::quadtree
00185 } // namespace geos::index
00186 } // namespace geos
00187 
00188 #endif // GEOS_IDX_QUADTREE_QUADTREE_H
00189 
00190 /**********************************************************************
00191  * $Log$
00192  * Revision 1.2  2006/04/03 08:29:30  strk
00193  * Added port info, cleaned up log message, minor assertion checking.
00194  *
00195  * Revision 1.1  2006/03/22 12:22:50  strk
00196  * indexQuadtree.h split
00197  *
00198  **********************************************************************/
00199 

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