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# HotPixel.h

    00001 /**********************************************************************
    00002  * $Id: HotPixel.h 3527 2011-12-06 17:26:09Z strk $
    00003  *
    00004  * GEOS - Geometry Engine Open Source
    00005  * http://geos.refractions.net
    00006  *
    00007  * Copyright (C) 2006      Refractions Research Inc.
    00008  *
    00009  * This is free software; you can redistribute and/or modify it under
    00010  * the terms of the GNU Lesser General Public Licence as published
    00011  * by the Free Software Foundation.
    00012  * See the COPYING file for more information.
    00013  *
    00014  **********************************************************************
    00015  *
    00016  * Last port: noding/snapround/HotPixel.java r320 (JTS-1.12)
    00017  *
    00018  **********************************************************************/
    00019
    00020 #ifndef GEOS_NODING_SNAPROUND_HOTPIXEL_H
    00021 #define GEOS_NODING_SNAPROUND_HOTPIXEL_H
    00022
    00023 #include <geos/export.h>
    00024
    00025 #include <geos/inline.h>
    00026
    00027 #include <geos/geom/Coordinate.h> // for composition
    00028 #include <geos/geom/Envelope.h> // for auto_ptr
    00029
    00030 #ifdef _MSC_VER
    00031 #pragma warning(push)
    00032 #pragma warning(disable: 4251) // warning C4251: needs to have dll-interface to be used by clients of class
    00033 #endif
    00034
    00035 // Forward declarations
    00036 namespace geos {
    00037         namespace geom {
    00038                 class Envelope;
    00039         }
    00040         namespace algorithm {
    00041                 class LineIntersector;
    00042         }
    00043         namespace noding {
    00044                 class NodedSegmentString;
    00045         }
    00046 }
    00047
    00048 namespace geos {
    00049 namespace noding { // geos::noding
    00050 namespace snapround { // geos::noding::snapround
    00051
    00063 class GEOS_DLL HotPixel {
    00064
    00065 private:
    00066
    00067         algorithm::LineIntersector& li;
    00068
    00069         geom::Coordinate pt;
    00070         const geom::Coordinate& originalPt;
    00071         geom::Coordinate ptScaled;
    00072
    00073         mutable geom::Coordinate p0Scaled;
    00074         mutable geom::Coordinate p1Scaled;
    00075
    00076         double scaleFactor;
    00077
    00078         double minx;
    00079         double maxx;
    00080         double miny;
    00081         double maxy;
    00082
    00090         std::vector<geom::Coordinate> corner;
    00091
    00093         mutable std::auto_ptr<geom::Envelope> safeEnv;
    00094
    00095         void initCorners(const geom::Coordinate& pt);
    00096
    00097         double scale(double val) const;
    00098
    00099         void copyScaled(const geom::Coordinate& p,
    00100                         geom::Coordinate& pScaled) const;
    00101
    00123         bool intersectsToleranceSquare(const geom::Coordinate& p0,
    00124                         const geom::Coordinate& p1) const;
    00125
    00126
    00141         bool intersectsPixelClosure(const geom::Coordinate& p0,
    00142                         const geom::Coordinate& p1);
    00143
    00144         bool intersectsScaled(const geom::Coordinate& p0,
    00145                         const geom::Coordinate& p1) const;
    00146
    00147     // Declare type as noncopyable
    00148     HotPixel(const HotPixel& other);
    00149     HotPixel& operator=(const HotPixel& rhs);
    00150
    00151 public:
    00152
    00162         HotPixel(const geom::Coordinate& pt,
    00163                         double scaleFact,
    00164                         algorithm::LineIntersector& li);
    00165
    00169         const geom::Coordinate& getCoordinate() const { return originalPt; }
    00170
    00178         const geom::Envelope& getSafeEnvelope() const;
    00179
    00187         bool intersects(const geom::Coordinate& p0,
    00188                         const geom::Coordinate& p1) const;
    00189
    00198         bool addSnappedNode(NodedSegmentString& segStr, std::size_t segIndex);
    00199
    00200 };
    00201
    00202 } // namespace geos::noding::snapround
    00203 } // namespace geos::noding
    00204 } // namespace geos
    00205
    00206 #ifdef _MSC_VER
    00207 #pragma warning(pop)
    00208 #endif
    00209
    00210 #ifdef GEOS_INLINE
    00211 # include "geos/noding/snapround/HotPixel.inl"
    00212 #endif
    00213
    00214 #endif // GEOS_NODING_SNAPROUND_HOTPIXEL_H
    00215
    00216 /**********************************************************************
    00217  * $Log$
    00218  * Revision 1.3  2006/05/03 17:50:49  strk
    00219  * Doxygen comments
    00220  *
    00221  * Revision 1.2  2006/03/24 09:52:41  strk
    00222  * USE_INLINE => GEOS_INLINE
    00223  *
    00224  * Revision 1.1  2006/03/14 12:55:56  strk
    00225  * Headers split: geomgraphindex.h, nodingSnapround.h
    00226  *
    00227  **********************************************************************/
    00228