LinearBoundary.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (c) 2024 Martin Davis
 * Copyright (C) 2024 Paul Ramsey <pramsey@cleverelephant.ca>
 *
 * 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/Coordinate.h>
#include <geos/export.h>
 
#include <memory>
#include <vector>
 
// Forward declarations
namespace geos {
namespace algorithm {
    class BoundaryNodeRule;
}
namespace geom {
    class CoordinateXY;
    class LineString;
}
}
 
namespace geos {      // geos.
namespace operation { // geos.operation
namespace relateng { // geos.operation.relateng
 
class GEOS_DLL LinearBoundary {
    using BoundaryNodeRule = geos::algorithm::BoundaryNodeRule;
    using Coordinate = geos::geom::Coordinate;
    using CoordinateXY = geos::geom::CoordinateXY;
    using LineString = geos::geom::LineString;
 
private:
 
    // Members
 
    Coordinate::ConstIntMap m_vertexDegree;
    bool m_hasBoundary;
    const BoundaryNodeRule& m_boundaryNodeRule;
 
 
public:
 
    // Constructors
 
    LinearBoundary(std::vector<const LineString*>& lines, const BoundaryNodeRule& bnRule);
 
    bool hasBoundary() const;
 
    bool isBoundary(const CoordinateXY* pt) const;
 
 
private:
 
    // Methods
 
    bool checkBoundary(Coordinate::ConstIntMap& vertexDegree) const;
 
    static void computeBoundaryPoints(
        std::vector<const LineString*>& lines,
        Coordinate::ConstIntMap& vertexDegree);
 
    static void addEndpoint(
        const CoordinateXY *p,
        Coordinate::ConstIntMap& vertexDegree);
 
 
};
 
} // namespace geos.operation.relateng
} // namespace geos.operation
} // namespace geos