83 строки
1.9 KiB
C++
83 строки
1.9 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) 2005-2006 Refractions Research Inc.
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* Copyright (C) 2001-2002 Vivid Solutions 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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*
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* Last port: algorithm/InteriorPointLine.java r317 (JTS-1.12)
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*
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**********************************************************************/
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#ifndef GEOS_ALGORITHM_INTERIORPOINTLINE_H
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#define GEOS_ALGORITHM_INTERIORPOINTLINE_H
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#include <geos/export.h>
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#include <geos/geom/Coordinate.h>
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// Forward declarations
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namespace geos {
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namespace geom {
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class Geometry;
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class CoordinateSequence;
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}
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}
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namespace geos {
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namespace algorithm { // geos::algorithm
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/** \brief
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* Computes a point in the interior of an linear geometry.
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*
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* <h2>Algorithm</h2>
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*
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* - Find an interior vertex which is closest to
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* the centroid of the linestring.
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* - If there is no interior vertex, find the endpoint which is
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* closest to the centroid.
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*/
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class GEOS_DLL InteriorPointLine {
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public:
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InteriorPointLine(const geom::Geometry* g);
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//Coordinate* getInteriorPoint() const;
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bool getInteriorPoint(geom::Coordinate& ret) const;
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private:
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bool hasInterior;
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geom::Coordinate centroid;
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double minDistance;
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geom::Coordinate interiorPoint;
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void addInterior(const geom::Geometry* geom);
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void addInterior(const geom::CoordinateSequence* pts);
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void addEndpoints(const geom::Geometry* geom);
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void addEndpoints(const geom::CoordinateSequence* pts);
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void add(const geom::Coordinate& point);
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};
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} // namespace geos::algorithm
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} // namespace geos
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#endif // GEOS_ALGORITHM_INTERIORPOINTLINE_H
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