87 lines
2.1 KiB
C++
87 lines
2.1 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) 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: index/chain/MonotoneChainOverlapAction.java rev. 1.6 (JTS-1.10)
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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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#include <geos/geom/LineSegment.h>
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// Forward declarations
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namespace geos {
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namespace index {
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namespace chain {
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class MonotoneChain;
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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 chain { // geos::index::chain
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/** \brief
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* The action for the internal iterator for performing
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* overlap queries on a MonotoneChain.
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*/
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class GEOS_DLL MonotoneChainOverlapAction {
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protected:
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geom::LineSegment overlapSeg1;
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geom::LineSegment overlapSeg2;
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public:
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MonotoneChainOverlapAction() {}
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virtual
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~MonotoneChainOverlapAction() {}
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/** \brief
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* This function can be overridden if the original chains are needed.
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*
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* @param mc1 a MonotoneChain
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* @param mc2 a MonotoneChain
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* @param start1 the index of the start of the overlapping segment
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* from mc1
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* @param start2 the index of the start of the overlapping segment
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* from mc2
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*/
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virtual void overlap(const MonotoneChain& mc1, std::size_t start1,
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const MonotoneChain& mc2, std::size_t start2);
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/** \brief
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* This is a convenience function which can be overridden to
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* obtain the actual line segments which overlap.
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*
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* **param** `seg1`
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* **param** `seg2`
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*/
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virtual void
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overlap(const geom::LineSegment& /*seg1*/,
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const geom::LineSegment& /*seg2*/) {}
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};
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} // namespace geos::index::chain
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} // namespace geos::index
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} // namespace geos
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