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HotPixel.h

00001 /**********************************************************************
00002  * $Id: HotPixel.h 2777 2009-12-03 19:41:15Z mloskot $
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 rev. 1.3 (JTS-1.9)
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 // Forward declarations
00031 namespace geos {
00032         namespace geom {
00033                 class Envelope;
00034         }
00035         namespace algorithm {
00036                 class LineIntersector;
00037         }
00038         namespace noding {
00039                 class NodedSegmentString;
00040         }
00041 }
00042 
00043 namespace geos {
00044 namespace noding { // geos::noding
00045 namespace snapround { // geos::noding::snapround
00046 
00058 class GEOS_DLL HotPixel {
00059 
00060 private:
00061 
00062         algorithm::LineIntersector& li;
00063 
00064         geom::Coordinate pt;
00065         const geom::Coordinate& originalPt;
00066         geom::Coordinate ptScaled;
00067 
00068         mutable geom::Coordinate p0Scaled;
00069         mutable geom::Coordinate p1Scaled;
00070 
00071         double scaleFactor;
00072 
00073         double minx;
00074         double maxx;
00075         double miny;
00076         double maxy;
00077 
00085         std::vector<geom::Coordinate> corner;
00086 
00088         mutable std::auto_ptr<geom::Envelope> safeEnv; 
00089 
00090         void initCorners(const geom::Coordinate& pt);
00091 
00092         double scale(double val) const;
00093 
00094         void copyScaled(const geom::Coordinate& p,
00095                         geom::Coordinate& pScaled) const;
00096 
00118         bool intersectsToleranceSquare(const geom::Coordinate& p0,
00119                         const geom::Coordinate& p1) const;
00120  
00121 
00136         bool intersectsPixelClosure(const geom::Coordinate& p0,
00137                         const geom::Coordinate& p1);
00138  
00139     // Declare type as noncopyable
00140     HotPixel(const HotPixel& other);
00141     HotPixel& operator=(const HotPixel& rhs);
00142 
00143 public:
00144 
00145         HotPixel(const geom::Coordinate& pt,
00146                         double scaleFact,
00147                         algorithm::LineIntersector& li);
00148 
00152         const geom::Coordinate& getCoordinate() const { return originalPt; }
00153 
00158         const geom::Envelope& getSafeEnvelope() const;
00159 
00160         bool intersectsScaled(const geom::Coordinate& p0,
00161                         const geom::Coordinate& p1) const;
00162 
00163         bool intersects(const geom::Coordinate& p0,
00164                         const geom::Coordinate& p1) const;
00165  
00174         bool addSnappedNode(NodedSegmentString& segStr, size_t segIndex);
00175 
00176 };
00177 
00178 
00179 
00180 } // namespace geos::noding::snapround
00181 } // namespace geos::noding
00182 } // namespace geos
00183 
00184 #ifdef GEOS_INLINE
00185 # include "geos/noding/snapround/HotPixel.inl"
00186 #endif
00187 
00188 #endif // GEOS_NODING_SNAPROUND_HOTPIXEL_H
00189 
00190 /**********************************************************************
00191  * $Log$
00192  * Revision 1.3  2006/05/03 17:50:49  strk
00193  * Doxygen comments
00194  *
00195  * Revision 1.2  2006/03/24 09:52:41  strk
00196  * USE_INLINE => GEOS_INLINE
00197  *
00198  * Revision 1.1  2006/03/14 12:55:56  strk
00199  * Headers split: geomgraphindex.h, nodingSnapround.h
00200  *
00201  **********************************************************************/
00202 

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