GeometrySnapper.h

/**********************************************************************
 *
 * 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)
 *
 **********************************************************************/
 
#pragma once
 
#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