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 auto_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::auto_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);
    HotPixel& operator=(const HotPixel& rhs);
 
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