GEOS  3.3.6
Quadtree.h
00001 /**********************************************************************
00002  * $Id: Quadtree.h 3255 2011-03-01 17:56:10Z mloskot $
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 #ifdef _MSC_VER
00031 #pragma warning(push)
00032 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
00033 #endif
00034 
00035 // Forward declarations
00036 namespace geos {
00037         namespace geom {
00038                 class Envelope;
00039         }
00040         namespace index {
00041                 namespace quadtree {
00042                         // class Root; 
00043                 }
00044         }
00045 }
00046 
00047 namespace geos {
00048 namespace index { // geos::index
00049 namespace quadtree { // geos::index::quadtree
00050 
00073 class GEOS_DLL Quadtree: public SpatialIndex {
00074 
00075 private:
00076 
00077         std::vector<geom::Envelope *> newEnvelopes;
00078 
00079         void collectStats(const geom::Envelope& itemEnv);
00080 
00081         Root root;
00082 
00094         double minExtent;
00095 
00096 public:
00104         static geom::Envelope* ensureExtent(const geom::Envelope *itemEnv,
00105                         double minExtent);
00106 
00111         Quadtree()
00112                 :
00113                 root(),
00114                 minExtent(1.0)
00115         {}
00116 
00117         ~Quadtree();
00118 
00120         int depth();
00121 
00123         int size();
00124         
00125         void insert(const geom::Envelope *itemEnv, void *item);
00126 
00144         void query(const geom::Envelope *searchEnv, std::vector<void*>& ret);
00145 
00146 
00163         void query(const geom::Envelope *searchEnv, ItemVisitor& visitor)
00164         {
00165                 /*
00166                  * the items that are matched are the items in quads which
00167                  * overlap the search envelope
00168                  */
00169                 root.visit(searchEnv, visitor);
00170         }
00171 
00179         bool remove(const geom::Envelope* itemEnv, void* item);
00180 
00182         std::vector<void*>* queryAll();
00183 
00184         std::string toString() const;
00185 
00186 };
00187 
00188 } // namespace geos::index::quadtree
00189 } // namespace geos::index
00190 } // namespace geos
00191 
00192 #ifdef _MSC_VER
00193 #pragma warning(pop)
00194 #endif
00195 
00196 #endif // GEOS_IDX_QUADTREE_QUADTREE_H
00197 
00198 /**********************************************************************
00199  * $Log$
00200  * Revision 1.2  2006/04/03 08:29:30  strk
00201  * Added port info, cleaned up log message, minor assertion checking.
00202  *
00203  * Revision 1.1  2006/03/22 12:22:50  strk
00204  * indexQuadtree.h split
00205  *
00206  **********************************************************************/
00207