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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