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83 lines
1.7 KiB
C++
83 lines
1.7 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) 2020 Paul Ramsey <pramsey@cleverelephant.ca>
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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/operation/overlayng/OverlayLabel.h>
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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 geom {
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class Coordinate;
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}
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namespace operation {
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namespace overlayng {
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class Edge;
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}
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}
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}
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namespace geos { // geos.
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namespace operation { // geos.operation
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namespace overlayng { // geos.operation.overlayng
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// using geos::geom::Location;
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// using geos::geom::Position;
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/**
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* A key for sorting and comparing edges in a noded arrangement.
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* Relies on the fact that in a correctly noded arrangement
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* edges are identical (up to direction)
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* iff they have their first segment in common.
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*
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* @author mdavis
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*
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*/
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class GEOS_DLL EdgeKey {
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private:
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// Members
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double p0x;
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double p0y;
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double p1x;
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double p1y;
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// Methods
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void initPoints(const Edge* edge);
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void init(const geom::Coordinate& p0, const geom::Coordinate& p1);
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public:
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EdgeKey(const Edge* edge);
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int compareTo(const EdgeKey* ek) const;
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bool equals(const EdgeKey* ek) const;
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friend bool operator< (const EdgeKey& ek1, const EdgeKey& ek2);
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friend bool operator== (const EdgeKey& ek1, const EdgeKey& ek2);
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};
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} // namespace geos.operation.overlayng
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} // namespace geos.operation
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} // namespace geos
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