ScaledNoder.h

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/**********************************************************************
 *
 * 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() override;

    std::vector<SegmentString*>* getNodedSubstrings() const override;

    void computeNodes(std::vector<SegmentString*>* inputSegStr) override;

    //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) = delete;
    ScaledNoder& operator=(const ScaledNoder& rhs) = delete;
};

} // namespace geos.noding
} // namespace geos

#ifdef _MSC_VER
#pragma warning(pop)
#endif

#endif // GEOS_NODING_SCALEDNODER_H