72 lines
1.5 KiB
C++
72 lines
1.5 KiB
C++
/**********************************************************************
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*
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* GEOS - Geometry Engine Open Source
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* http://geos.osgeo.org
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*
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* Copyright (C) 2006 Refractions Research Inc.
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*
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* This is free software; you can redistribute and/or modify it under
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* the terms of the GNU Lesser General Public Licence as published
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* by the Free Software Foundation.
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* See the COPYING file for more information.
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*
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**********************************************************************/
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#pragma once
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#include <geos/export.h>
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// Forward declarations
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namespace geos {
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namespace index {
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namespace bintree {
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class Interval;
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}
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}
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}
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namespace geos {
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namespace index { // geos::index
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namespace bintree { // geos::index::bintree
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/** \brief
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* A Key is a unique identifier for a node in a tree.
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*
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* It contains a lower-left point and a level number.
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* The level number is the power of two for the size of the node envelope
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*/
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class GEOS_DLL Key {
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public:
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static int computeLevel(Interval* newInterval);
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Key(Interval* newInterval);
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~Key();
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double getPoint();
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int getLevel();
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Interval* getInterval();
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void computeKey(Interval* itemInterval);
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private:
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// the fields which make up the key
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double pt;
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int level;
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// auxiliary data which is derived from the key for use in computation
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Interval* interval;
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void computeInterval(int level, Interval* itemInterval);
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};
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} // namespace geos::index::bintree
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} // namespace geos::index
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} // namespace geos
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