85 lines
2.9 KiB
C++
85 lines
2.9 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) 2016 Daniel Baston
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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: operation/distance/FacetSequence.java (f6187ee2 JTS-1.14)
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*
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**********************************************************************/
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#pragma once
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#include <geos/geom/CoordinateSequence.h>
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#include <geos/geom/Envelope.h>
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#include <geos/geom/Coordinate.h>
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#include <geos/geom/LineSegment.h>
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#include <geos/operation/distance/GeometryLocation.h>
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namespace geos {
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namespace operation {
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namespace distance {
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class FacetSequence {
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private:
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const geom::CoordinateSequence* pts;
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const std::size_t start;
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const std::size_t end;
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const geom::Geometry* geom;
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/*
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* Unlike JTS, we store the envelope in the FacetSequence so
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* that it has a clear owner. This is helpful when making a
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* tree of FacetSequence objects (FacetSequenceTreeBuilder)
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*/
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geom::Envelope env;
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double computeDistanceLineLine(const FacetSequence& facetSeq,
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std::vector<GeometryLocation> *locs) const;
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double computeDistancePointLine(const geom::Coordinate& pt,
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const FacetSequence& facetSeq,
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std::vector<GeometryLocation> *locs) const;
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void updateNearestLocationsPointLine(const geom::Coordinate& pt,
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const FacetSequence& facetSeq, std::size_t i,
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const geom::Coordinate& q0, const geom::Coordinate &q1,
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std::vector<GeometryLocation> *locs) const;
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void updateNearestLocationsLineLine(std::size_t i, const geom::Coordinate& p0, const geom::Coordinate& p1,
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const FacetSequence& facetSeq,
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std::size_t j, const geom::Coordinate& q0, const geom::Coordinate &q1,
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std::vector<GeometryLocation> *locs) const;
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void computeEnvelope();
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public:
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const geom::Envelope* getEnvelope() const;
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const geom::Coordinate* getCoordinate(std::size_t index) const;
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std::size_t size() const;
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bool isPoint() const;
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double distance(const FacetSequence& facetSeq) const;
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FacetSequence(const geom::CoordinateSequence* pts, std::size_t start, std::size_t end);
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FacetSequence(const geom::Geometry* geom, const geom::CoordinateSequence* pts, std::size_t start, std::size_t end);
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std::vector<GeometryLocation> nearestLocations(const FacetSequence& facetSeq) const;
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};
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}
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}
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}
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