GeometrySnapper.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2009-2010  Sandro Santilli <strk@keybit.net>
 * 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::auto_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::auto_ptr<geom::Geometry> snapTo(const geom::Geometry& g,
                                             double snapTolerance);

        std::auto_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::auto_ptr<geom::Coordinate::ConstVect> extractTargetCoordinates(
                        const geom::Geometry& g);
 
    // Declare type as noncopyable
    GeometrySnapper(const GeometrySnapper& other);
    GeometrySnapper& operator=(const GeometrySnapper& rhs);
};
 
 
} // namespace geos::operation::overlay::snap
} // namespace geos::operation::overlay
} // namespace geos::operation
} // namespace geos
 
#endif // GEOS_OP_OVERLAY_SNAP_GEOMETRYSNAPPER_H