OverlayNGRobust.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.
 *
 **********************************************************************
 *
 * Last port: operation/overlayng/OverlayNGRobust.java 6ef89b09
 *
 **********************************************************************/
 
#pragma once
 
#include <geos/export.h>
#include <geos/geom/PrecisionModel.h>
#include <geos/operation/union/UnionStrategy.h>
#include <geos/operation/overlayng/OverlayNG.h>
 
 
// Forward declarations
namespace geos {
namespace geom {
class Geometry;
}
}
 
namespace geos {      // geos.
namespace operation { // geos.operation
namespace overlayng { // geos.operation.overlayng
 

class GEOS_DLL OverlayNGRobust {
    using Geometry = geos::geom::Geometry;
 
private:
 
 
    // Constants
    static constexpr int NUM_SNAP_TRIES = 5;
    static constexpr double SNAP_TOL_FACTOR = 1e12;
 
    static std::unique_ptr<Geometry> overlaySnapping(
        const Geometry* geom0, const Geometry* geom1, int opCode, double snapTol);
 
    static std::unique_ptr<Geometry> overlaySnapBoth(
        const Geometry* geom0, const Geometry* geom1, int opCode, double snapTol);
 
    static std::unique_ptr<Geometry> overlaySnapTol(
        const Geometry* geom0, const Geometry* geom1, int opCode, double snapTol);
 
    static double snapTolerance(const Geometry* geom);

    static double ordinateMagnitude(const Geometry* geom);

    static std::unique_ptr<Geometry>
    overlaySR(const Geometry* geom0, const Geometry* geom1, int opCode);

        static std::unique_ptr<Geometry>
        snapSelf(const Geometry* geom, double snapTol);
 
 
public:
 
    class SRUnionStrategy : public operation::geounion::UnionStrategy {
 
        std::unique_ptr<geom::Geometry> Union(const geom::Geometry* g0, const geom::Geometry* g1) override
        {
            return OverlayNGRobust::Overlay(g0, g1, OverlayNG::UNION);
        };
 
        bool isFloatingPrecision() const override
        {
            return true;
        };
 
    };
 
    static std::unique_ptr<Geometry> Intersection(
        const Geometry* g0, const Geometry* g1);
 
    static std::unique_ptr<Geometry> Union(
        const Geometry* g0, const Geometry* g1);
 
    static std::unique_ptr<Geometry> Difference(
        const Geometry* g0, const Geometry* g1);
 
    static std::unique_ptr<Geometry> SymDifference(
        const Geometry* g0, const Geometry* g1);
 
    static std::unique_ptr<Geometry> Union(
        const Geometry* a);
 
    static std::unique_ptr<Geometry> Overlay(
        const Geometry* geom0, const Geometry* geom1, int opCode);
 
    static std::unique_ptr<Geometry> overlaySnapTries(
        const Geometry* geom0, const Geometry* geom1, int opCode);

    static double snapTolerance(const Geometry* geom0, const Geometry* geom1);
 
 
 
 
};
 
 
} // namespace geos.operation.overlayng
} // namespace geos.operation
} // namespace geos