PolygonNodeConverter.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/operation/relateng/NodeSection.h>
#include <geos/export.h>
#include <vector>
#include <memory>
 
// Forward declarations
namespace geos {
namespace operation {
namespace relateng {
// class NodeSection;
}
}
}
 
 
// using geos::geom::CoordinateXY;
// using geos::geom::Geometry;
 
 
namespace geos {      // geos.
namespace operation { // geos.operation
namespace relateng {  // geos.operation.relateng
 
class GEOS_DLL PolygonNodeConverter {
    using CoordinateXY = geos::geom::CoordinateXY;
 
public:
 
    static std::vector<std::unique_ptr<NodeSection>> convert(
        std::vector<const NodeSection*>& polySections);
 
 
private:
 
    static std::size_t convertShellAndHoles(
        std::vector<const NodeSection*>& sections,
        std::size_t shellIndex,
        std::vector<std::unique_ptr<NodeSection>>& convertedSections);
 
    static std::vector<std::unique_ptr<NodeSection>> convertHoles(
        std::vector<const NodeSection*>& sections);
 
    static NodeSection* createSection(
        const NodeSection* ns,
        const CoordinateXY* v0,
        const CoordinateXY* v1);
 
    static std::vector<const NodeSection*> extractUnique(
        std::vector<const NodeSection*>& sections);
 
    static std::size_t next(
        std::vector<const NodeSection *>& ns, std::size_t i);
 
    static std::size_t findShell(
        std::vector<const NodeSection *>& polySections);
 
 
};
 
} // namespace geos.operation.relateng
} // namespace geos.operation
} // namespace geos