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# Key.h

    00001 /**********************************************************************
    00002  * $Id: Key.h 1820 2006-09-06 16:54:23Z 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 #ifndef GEOS_IDX_QUADTREE_KEY_H
    00017 #define GEOS_IDX_QUADTREE_KEY_H
    00018
    00019 // Forward declarations
    00020 namespace geos {
    00021         namespace geom {
    00022                 class Envelope;
    00023                 class Coordinate;
    00024         }
    00025 }
    00026
    00027 namespace geos {
    00028 namespace index { // geos::index
    00029 namespace quadtree { // geos::index::quadtree
    00030
    00038 class Key {
    00039 public:
    00040         static int computeQuadLevel(geom::Envelope *env);
    00041         Key(geom::Envelope *itemEnv);
    00042         virtual ~Key();
    00043         geom::Coordinate* getPoint();
    00044         int getLevel();
    00045         geom::Envelope* getEnvelope();
    00046         geom::Coordinate* getCentre();
    00047         void computeKey(geom::Envelope *itemEnv);
    00048 private:
    00049         // the fields which make up the key
    00050         geom::Coordinate *pt;
    00051         int level;
    00052         // auxiliary data which is derived from the key for use in computation
    00053         geom::Envelope *env;
    00054         void computeKey(int level,geom::Envelope *itemEnv);
    00055 };
    00056
    00057 } // namespace geos::index::quadtree
    00058 } // namespace geos::index
    00059 } // namespace geos
    00060
    00061 #endif // GEOS_IDX_QUADTREE_KEY_H
    00062
    00063 /**********************************************************************
    00064  * $Log$
    00065  * Revision 1.1  2006/03/22 12:22:50  strk
    00066  * indexQuadtree.h split
    00067  *
    00068  **********************************************************************/
    00069