64 lines
1.8 KiB
C
64 lines
1.8 KiB
C
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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) 2012 Excensus LLC.
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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 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: triangulate/quadedge/LastFoundQuadEdgeLocator.java r524
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*
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**********************************************************************/
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#pragma once
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#include <geos/triangulate/quadedge/QuadEdge.h>
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#include <geos/triangulate/quadedge/QuadEdgeLocator.h>
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namespace geos {
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namespace triangulate { //geos.triangulate
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namespace quadedge { //geos.triangulate.quadedge
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//fwd declarations
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class QuadEdgeSubdivision;
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/** \brief
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* Locates {@link QuadEdge}s in a {@link QuadEdgeSubdivision}, optimizing the
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* search by starting in the locality of the last edge found.
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*
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* @author JTS: Martin Davis
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* @author Benjamin Campbell
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*/
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class LastFoundQuadEdgeLocator : public QuadEdgeLocator {
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private:
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QuadEdgeSubdivision* subdiv;
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QuadEdge* lastEdge;
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public:
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LastFoundQuadEdgeLocator(QuadEdgeSubdivision* subdiv);
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private:
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virtual void init();
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virtual QuadEdge* findEdge();
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public:
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/**
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* Locates an edge e, such that either v is on e, or e is an edge of a triangle containing v.
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* The search starts from the last located edge amd proceeds on the general direction of v.
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* @return The caller _does not_ take ownership of the returned object.
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*/
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QuadEdge* locate(const Vertex& v) override;
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};
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} //namespace geos.triangulate.quadedge
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} //namespace geos.triangulate
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} //namespace goes
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