ScaledNoder.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * 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: noding/ScaledNoder.java rev. 1.3 (JTS-1.7.1)
 *
 **********************************************************************/
 
#ifndef GEOS_NODING_SCALEDNODER_H
#define GEOS_NODING_SCALEDNODER_H
 
#include <geos/export.h>
 
#include <cassert>
#include <vector>
 
#include <geos/inline.h>
#include <geos/noding/Noder.h> // for inheritance
//#include <geos/geom/CoordinateFilter.h> // for inheritance
#include <geos/util.h>
 
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
#endif
 
// Forward declarations
namespace geos {
        namespace geom {
                class Coordinate;
                class CoordinateSequence;
        }
        namespace noding {
                class SegmentString;
        }
}
 
namespace geos {
namespace noding { // geos.noding

class GEOS_DLL ScaledNoder : public Noder { // , public geom::CoordinateFilter { // implements Noder
 
public:
 
        bool isIntegerPrecision() { return (scaleFactor == 1.0); }
 
        ScaledNoder(Noder& n, double nScaleFactor,
                        double nOffsetX=0.0, double nOffsetY=0.0)
                :
                noder(n),
                scaleFactor(nScaleFactor),
                offsetX(nOffsetX),
                offsetY(nOffsetY),
                isScaled(nScaleFactor!=1.0)
        {}
 
        ~ScaledNoder();
 
        std::vector<SegmentString*>* getNodedSubstrings() const;
 
        void computeNodes(std::vector<SegmentString*>* inputSegStr);
 
        //void filter(Coordinate& c);
 
        void filter_ro(const geom::Coordinate* c)
    {
        ::geos::ignore_unused_variable_warning(c);
        assert(0);
    }
 
        void filter_rw(geom::Coordinate* c) const;
 
private:
 
        Noder& noder;
 
        double scaleFactor;
 
        double offsetX;
 
        double offsetY;
 
        bool isScaled;
 
        void rescale(std::vector<SegmentString*>& segStrings) const;
 
        void scale(std::vector<SegmentString*>& segStrings) const;
 
        class Scaler;
 
        class ReScaler;
 
        friend class ScaledNoder::Scaler;
 
        friend class ScaledNoder::ReScaler;
 
    mutable std::vector<geom::CoordinateSequence*> newCoordSeq;
 
    // Declare type as noncopyable
    ScaledNoder(const ScaledNoder& other);
    ScaledNoder& operator=(const ScaledNoder& rhs);
};
 
} // namespace geos.noding
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#endif // GEOS_NODING_SCALEDNODER_H