CircularString.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2024 ISciences, LLC
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation.
 * See the COPYING file for more information.
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/geom/CircularArc.h>
#include <geos/geom/LineString.h>
#include <geos/geom/SimpleCurve.h>
 
namespace geos {
namespace geom {
 
class GEOS_DLL CircularString : public SimpleCurve {
 
public:
    using SimpleCurve::SimpleCurve;
 
    friend class GeometryFactory;
 
    ~CircularString() override;
 
    std::unique_ptr<CircularString> clone() const;
 
    const std::vector<CircularArc>& getArcs() const;
 
    std::string getGeometryType() const override;
 
    GeometryTypeId getGeometryTypeId() const override;
 
    double getLength() const override;
 
    bool hasCurvedComponents() const override
    {
        return true;
    }
 
    bool isCurved() const override {
        return true;
    }
 
    void normalize() override;
 
    std::unique_ptr<CircularString> reverse() const
    {
        return std::unique_ptr<CircularString>(reverseImpl());
    }
 
    std::unique_ptr<Curve> getCurved(const algorithm::LineToCurveParams&) const;
 
protected:

    CircularString(std::unique_ptr<CoordinateSequence>&& pts,
                   const GeometryFactory& newFactory);
 
    CircularString(const std::shared_ptr<const CoordinateSequence>& pts,
                   const GeometryFactory& newFactory);
 
    CircularString* cloneImpl() const override
    {
        return new CircularString(*this);
    }
 
    void geometryChangedAction() override
    {
        envelope = computeEnvelopeInternal(false);
    }
 
    CircularString* getCurvedImpl(const algorithm::LineToCurveParams&) const override {
        return cloneImpl();
    }
 
    LineString* getLinearizedImpl(const algorithm::CurveToLineParams&) const override;
 
    int
    getSortIndex() const override
    {
        return SORTINDEX_CIRCULARSTRING;
    };
 
    CircularString* reverseImpl() const override;
 
    void validateConstruction();
 
private:
    void createArcs() const;
 
    void normalizeClosed();
 
    mutable std::vector<CircularArc> arcs;
 
};
 
 
}
}