UnaryUnionNG.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2020 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/export.h>
#include <geos/geom/PrecisionModel.h>
#include <geos/operation/union/UnionStrategy.h>
#include <geos/operation/overlayng/OverlayNG.h>
#include <geos/operation/overlayng/OverlayUtil.h>
 
 
 
// Forward declarations
namespace geos {
namespace geom {
class Geometry;
}
}
 
namespace geos {      // geos.
namespace operation { // geos.operation
namespace overlayng { // geos.operation.overlayng

class GEOS_DLL UnaryUnionNG {
    using Geometry = geos::geom::Geometry;
    using PrecisionModel = geos::geom::PrecisionModel;
 
private:
 
    // Members
 
 
 
public:

    class NGUnionStrategy : public operation::geounion::UnionStrategy {
 
    public:
 
        NGUnionStrategy(const PrecisionModel& p_pm)
            : pm(p_pm)
            {};
 
        std::unique_ptr<geom::Geometry>
        Union(const geom::Geometry* g0, const geom::Geometry* g1) override
        {
            return OverlayNG::overlay(g0, g1, OverlayNG::UNION, &pm);
        }
 
        bool
        isFloatingPrecision() const override
        {
            return OverlayUtil::isFloating(&pm);
        }
 
    private:
 
        const geom::PrecisionModel& pm;
 
    };
 
 
    // static methods
    static std::unique_ptr<Geometry> Union(const Geometry* geom, const PrecisionModel& pm);
    static std::unique_ptr<Geometry> Union(const Geometry* geom);
 
 
};
 
 
} // namespace geos.operation.overlayng
} // namespace geos.operation
} // namespace geos