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/********************************************************************** |
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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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* Last port: index/chain/MonotoneChainOverlapAction.java rev. 1.6 (JTS-1.10) |
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**********************************************************************/ |
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#ifndef GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H |
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#define GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H |
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#include |
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#include |
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#include |
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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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/** |
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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 ~MonotoneChainOverlapAction() {} |
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/** |
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* This function can be overridden if the original chains are needed |
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* |
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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(MonotoneChain& mc1, std::size_t start1, |
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MonotoneChain& mc2, std::size_t start2); |
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/** |
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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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* @param seg1 |
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* @param seg2 |
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*/ |
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virtual void overlap(const geom::LineSegment& /*seg1*/, |
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const geom::LineSegment& /*seg2*/) |
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{} |
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// these envelopes are used during the MonotoneChain search process |
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geom::Envelope tempEnv1; |
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geom::Envelope tempEnv2; |
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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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#endif // GEOS_IDX_CHAIN_MONOTONECHAINOVERLAPACTION_H |
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