STRtree.h

00001 /**********************************************************************
00002  * $Id: STRtree.h 1971 2007-02-07 00:34:26Z 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/strtree/STRtree.java rev. 1.11
00017  *
00018  **********************************************************************/
00019 
00020 #ifndef GEOS_INDEX_STRTREE_STRTREE_H
00021 #define GEOS_INDEX_STRTREE_STRTREE_H
00022 
00023 #include <geos/index/strtree/AbstractSTRtree.h> // for inheritance
00024 #include <geos/index/SpatialIndex.h> // for inheritance
00025 #include <geos/geom/Envelope.h> // for inlines
00026 
00027 #include <vector>
00028 
00029 // Forward declarations
00030 namespace geos {
00031         namespace index { 
00032                 namespace strtree { 
00033                         class Boundable;
00034                 }
00035         }
00036 }
00037 
00038 
00039 namespace geos {
00040 namespace index { // geos::index
00041 namespace strtree { // geos::index::strtree
00042 
00058 class STRtree: public AbstractSTRtree, public SpatialIndex
00059 {
00060 using AbstractSTRtree::insert;
00061 using AbstractSTRtree::query;
00062 
00063 private:
00064         class STRIntersectsOp: public AbstractSTRtree::IntersectsOp {
00065                 public:
00066                         bool intersects(const void* aBounds, const void* bBounds);
00067         };
00068 
00076         std::auto_ptr<BoundableList> createParentBoundables(BoundableList* childBoundables, int newLevel);
00077 
00078         std::auto_ptr<BoundableList> createParentBoundablesFromVerticalSlices(std::vector<BoundableList*>* verticalSlices, int newLevel);
00079 
00080         STRIntersectsOp intersectsOp;
00081 
00082         std::auto_ptr<BoundableList> sortBoundables(const BoundableList* input);
00083 
00084         std::auto_ptr<BoundableList> createParentBoundablesFromVerticalSlice(
00085                         BoundableList* childBoundables,
00086                         int newLevel);
00087 
00093         std::vector<BoundableList*>* verticalSlices(
00094                         BoundableList* childBoundables,
00095                         size_t sliceCount);
00096 
00097 
00098 protected:
00099 
00100         AbstractNode* createNode(int level);
00101         
00102         IntersectsOp* getIntersectsOp() {
00103                 return &intersectsOp;
00104         };
00105 
00106 public:
00107 
00108         ~STRtree();
00109 
00114         STRtree(size_t nodeCapacity=10);
00115 
00116         void insert(const geom::Envelope *itemEnv,void* item);
00117 
00118         //static double centreX(const geom::Envelope *e);
00119 
00120         static double avg(double a, double b) {
00121                 return (a + b) / 2.0;
00122         }
00123 
00124         static double centreY(const geom::Envelope *e) {
00125                 return STRtree::avg(e->getMinY(), e->getMaxY());
00126         }
00127 
00128         void query(const geom::Envelope *searchEnv, std::vector<void*>& matches) {
00129                 AbstractSTRtree::query(searchEnv, matches);
00130         }
00131 
00132         void query(const geom::Envelope *searchEnv, ItemVisitor& visitor) {
00133                 return AbstractSTRtree::query(searchEnv, visitor);
00134         }
00135 
00136         bool remove(const geom::Envelope *itemEnv, void* item) {
00137                 return AbstractSTRtree::remove(itemEnv, item);
00138         }
00139 };
00140 
00141 } // namespace geos::index::strtree
00142 } // namespace geos::index
00143 } // namespace geos
00144 
00145 #endif // GEOS_INDEX_STRTREE_STRTREE_H
00146 
00147 /**********************************************************************
00148  * $Log$
00149  * Revision 1.3  2006/06/12 10:49:43  strk
00150  * unsigned int => size_t
00151  *
00152  * Revision 1.2  2006/04/03 08:43:09  strk
00153  * Added port info, minor cleanups
00154  *
00155  * Revision 1.1  2006/03/21 10:47:34  strk
00156  * indexStrtree.h split
00157  *
00158  **********************************************************************/
00159 

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