GeometrySnapper.h

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/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2009-2010  Sandro Santilli <strk@kbt.io>
 * Copyright (C) 2006 Refractions Research Inc.
 *
 * 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/overlay/snap/GeometrySnapper.java r320 (JTS-1.12)
 *
 **********************************************************************/

#ifndef GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H
#define GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H

#include <geos/geom/Coordinate.h>

#include <memory>
#include <vector>

// Forward declarations
namespace geos {
namespace geom {
//class PrecisionModel;
class Geometry;
class CoordinateSequence;
struct GeomPtrPair;
}
}

namespace geos {
namespace operation { // geos::operation
namespace overlay { // geos::operation::overlay
namespace snap { // geos::operation::overlay::snap

class GEOS_DLL GeometrySnapper {

public:

    typedef std::unique_ptr<geom::Geometry> GeomPtr;

    static void snap(const geom::Geometry& g0,
                     const geom::Geometry& g1,
                     double snapTolerance, geom::GeomPtrPair& ret);

    static GeomPtr snapToSelf(const geom::Geometry& g0,
                              double snapTolerance, bool cleanResult);

    GeometrySnapper(const geom::Geometry& g)
        :
        srcGeom(g)
    {
    }

    std::unique_ptr<geom::Geometry> snapTo(const geom::Geometry& g,
                                           double snapTolerance);

    std::unique_ptr<geom::Geometry> snapToSelf(double snapTolerance,
            bool cleanResult);

    static double computeOverlaySnapTolerance(const geom::Geometry& g);

    static double computeSizeBasedSnapTolerance(const geom::Geometry& g);

    static double computeOverlaySnapTolerance(const geom::Geometry& g1,
            const geom::Geometry& g2);


private:

    // eventually this will be determined from the geometry topology
    //static const double snapTol; //  = 0.000001;

    static const double snapPrecisionFactor; //  = 10e-10

    const geom::Geometry& srcGeom;

    std::unique_ptr<geom::Coordinate::ConstVect> extractTargetCoordinates(
        const geom::Geometry& g);

    // Declare type as noncopyable
    GeometrySnapper(const GeometrySnapper& other) = delete;
    GeometrySnapper& operator=(const GeometrySnapper& rhs) = delete;
};


} // namespace geos::operation::overlay::snap
} // namespace geos::operation::overlay
} // namespace geos::operation
} // namespace geos

#endif // GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H