HotPixel.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/snapround/HotPixel.java r320 (JTS-1.12)
 *
 **********************************************************************/
 
#ifndef GEOS_NODING_SNAPROUND_HOTPIXEL_H
#define GEOS_NODING_SNAPROUND_HOTPIXEL_H
 
#include <geos/export.h>
 
#include <geos/inline.h>
 
#include <geos/geom/Coordinate.h> // for composition
#include <geos/geom/Envelope.h> // for unique_ptr
 
#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 Envelope;
}
namespace algorithm {
class LineIntersector;
}
namespace noding {
class NodedSegmentString;
}
}
 
namespace geos {
namespace noding { // geos::noding
namespace snapround { // geos::noding::snapround
 
class GEOS_DLL HotPixel {
 
private:
 
    algorithm::LineIntersector& li;
 
    geom::Coordinate pt;
    const geom::Coordinate& originalPt;
    geom::Coordinate ptScaled;
 
    mutable geom::Coordinate p0Scaled;
    mutable geom::Coordinate p1Scaled;
 
    double scaleFactor;
 
    double minx;
    double maxx;
    double miny;
    double maxy;
 
    std::vector<geom::Coordinate> corner;
 
    mutable std::unique_ptr<geom::Envelope> safeEnv;
 
    void initCorners(const geom::Coordinate& pt);
 
    double scale(double val) const;
 
    void copyScaled(const geom::Coordinate& p,
                    geom::Coordinate& pScaled) const;
 
    bool intersectsToleranceSquare(const geom::Coordinate& p0,
                                   const geom::Coordinate& p1) const;
 
 
    bool intersectsPixelClosure(const geom::Coordinate& p0,
                                const geom::Coordinate& p1);
 
    bool intersectsScaled(const geom::Coordinate& p0,
                          const geom::Coordinate& p1) const;
 
    // Declare type as noncopyable
    HotPixel(const HotPixel& other) = delete;
    HotPixel& operator=(const HotPixel& rhs) = delete;
 
public:
 
    HotPixel(const geom::Coordinate& pt,
             double scaleFact,
             algorithm::LineIntersector& li);
 
    const geom::Coordinate&
    getCoordinate() const
    {
        return originalPt;
    }
 
    const geom::Envelope& getSafeEnvelope() const;
 
    bool intersects(const geom::Coordinate& p0,
                    const geom::Coordinate& p1) const;
 
    bool addSnappedNode(NodedSegmentString& segStr, std::size_t segIndex);
 
};
 
} // namespace geos::noding::snapround
} // namespace geos::noding
} // namespace geos
 
#ifdef _MSC_VER
#pragma warning(pop)
#endif
 
#ifdef GEOS_INLINE
# include "geos/noding/snapround/HotPixel.inl"
#endif
 
#endif // GEOS_NODING_SNAPROUND_HOTPIXEL_H