HotPixel.h

00001 /**********************************************************************
00002  * $Id: HotPixel.h 1820 2006-09-06 16:54:23Z 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. 1.2 (JTS-1.7)
00017  *
00018  **********************************************************************/
00019 
00020 #ifndef GEOS_NODING_SNAPROUND_HOTPIXEL_H
00021 #define GEOS_NODING_SNAPROUND_HOTPIXEL_H
00022 
00023 #include <geos/inline.h>
00024 
00025 #include <geos/geom/Coordinate.h> // for composition
00026 #include <geos/geom/Envelope.h> // for auto_ptr
00027 
00028 // Forward declarations
00029 namespace geos {
00030         namespace geom {
00031                 class Envelope;
00032         }
00033         namespace algorithm {
00034                 class LineIntersector;
00035         }
00036 }
00037 
00038 namespace geos {
00039 namespace noding { // geos::noding
00040 namespace snapround { // geos::noding::snapround
00041 
00053 class HotPixel {
00054 
00055 private:
00056 
00057         algorithm::LineIntersector& li;
00058 
00059         geom::Coordinate pt;
00060         const geom::Coordinate& originalPt;
00061         geom::Coordinate ptScaled;
00062 
00063         double scaleFactor;
00064 
00065         double minx;
00066         double maxx;
00067         double miny;
00068         double maxy;
00069 
00077         std::vector<geom::Coordinate> corner;
00078 
00080         mutable std::auto_ptr<geom::Envelope> safeEnv; 
00081 
00082         void initCorners(const geom::Coordinate& pt);
00083 
00084         double scale(double val) const;
00085 
00086         void copyScaled(const geom::Coordinate& p,
00087                         geom::Coordinate& pScaled) const;
00088 
00110         bool intersectsToleranceSquare(const geom::Coordinate& p0,
00111                         const geom::Coordinate& p1) const;
00112  
00113 
00128         bool intersectsPixelClosure(const geom::Coordinate& p0,
00129                         const geom::Coordinate& p1);
00130  
00131 public:
00132 
00133         HotPixel(const geom::Coordinate& pt,
00134                         double scaleFact,
00135                         algorithm::LineIntersector& li);
00136 
00140         const geom::Coordinate& getCoordinate() const { return originalPt; }
00141 
00146         const geom::Envelope& getSafeEnvelope() const;
00147 
00148         bool intersectsScaled(const geom::Coordinate& p0,
00149                         const geom::Coordinate& p1) const;
00150 
00151         bool intersects(const geom::Coordinate& p0,
00152                         const geom::Coordinate& p1) const;
00153  
00154 
00155 };
00156 
00157 
00158 
00159 } // namespace geos::noding::snapround
00160 } // namespace geos::noding
00161 } // namespace geos
00162 
00163 #ifdef GEOS_INLINE
00164 # include "geos/noding/snapround/HotPixel.inl"
00165 #endif
00166 
00167 #endif // GEOS_NODING_SNAPROUND_HOTPIXEL_H
00168 
00169 /**********************************************************************
00170  * $Log$
00171  * Revision 1.3  2006/05/03 17:50:49  strk
00172  * Doxygen comments
00173  *
00174  * Revision 1.2  2006/03/24 09:52:41  strk
00175  * USE_INLINE => GEOS_INLINE
00176  *
00177  * Revision 1.1  2006/03/14 12:55:56  strk
00178  * Headers split: geomgraphindex.h, nodingSnapround.h
00179  *
00180  **********************************************************************/
00181 

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