taggedlinesegment.h

来自「在Linux下做的QuadTree的程序」· C头文件 代码 · 共 98 行

/**********************************************************************
 * $Id: TaggedLineSegment.h 1820 2006-09-06 16:54:23Z mloskot $
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.refractions.net
 *
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: simplify/TaggedLineSegment.java rev. 1.1 (JTS-1.7)
 *
 **********************************************************************
 *
 * NOTES: Use of this class by DP simplification algorithms
 * makes it useless for a TaggedLineSegment to store copies
 * of coordinates. Using pointers would be good enough here.
 * We don't do it to avoid having to break inheritance from 
 * LineSegment, which has copies intead. Wheter LineSegment
 * itself should be refactored can be discussed. 
 *  --strk 2006-04-12
 *
 **********************************************************************/

#ifndef _GEOS_SIMPLIFY_TAGGEDLINESEGMENT_H_
#define _GEOS_SIMPLIFY_TAGGEDLINESEGMENT_H_ 

#include <geos/geom/LineSegment.h> // for inheritance


// Forward declarations
namespace geos {
	namespace geom {
		class Coordinate;
		class Geometry;
	}
}

namespace geos {
namespace simplify { // geos::simplify


/** \brief
 * A geom::LineSegment which is tagged with its location in a geom::Geometry.
 *
 * Used to index the segments in a geometry and recover the segment locations
 * from the index.
 */
class TaggedLineSegment: public geom::LineSegment
{

public:

	TaggedLineSegment(const geom::Coordinate& p0,
			const geom::Coordinate& p1,
			const geom::Geometry* parent,
			unsigned int index);

	TaggedLineSegment(const geom::Coordinate& p0,
			const geom::Coordinate& p1);

	TaggedLineSegment(const TaggedLineSegment& ls);

	const geom::Geometry* getParent() const;

	unsigned int getIndex() const;

private:

	const geom::Geometry* parent;

	unsigned int index;

};



} // namespace geos::simplify
} // namespace geos

#endif // _GEOS_SIMPLIFY_TAGGEDLINESEGMENT_H_ 

/**********************************************************************
 * $Log$
 * Revision 1.2  2006/04/12 17:19:57  strk
 * Ported TaggedLineStringSimplifier class, made LineSegment class
 * polymorphic to fix derivation of TaggedLineSegment
 *
 * Revision 1.1  2006/04/12 14:22:12  strk
 * Initial implementation of TaggedLineSegment and TaggedLineString classes
 *
 **********************************************************************/