MCPointInRing.h

00001 /**********************************************************************
00002  * $Id: MCPointInRing.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) 2005-2006 Refractions Research Inc.
00008  * Copyright (C) 2001-2002 Vivid Solutions Inc.
00009  *
00010  * This is free software; you can redistribute and/or modify it under
00011  * the terms of the GNU Lesser General Public Licence as published
00012  * by the Free Software Foundation. 
00013  * See the COPYING file for more information.
00014  *
00015  **********************************************************************/
00016 
00017 #ifndef GEOS_ALGORITHM_MCPOINTINRING_H
00018 #define GEOS_ALGORITHM_MCPOINTINRING_H
00019 
00020 #include <geos/index/chain/MonotoneChainSelectAction.h> // for inheritance
00021 #include <geos/algorithm/PointInRing.h> // for inheritance
00022 #include <geos/geom/Coordinate.h> // for composition
00023 #include <geos/index/bintree/Interval.h> // for composition
00024 
00025 #include <vector>
00026 
00027 // Forward declarations
00028 namespace geos {
00029         namespace geom {
00030                 class Coordinate;
00031                 class LineSegment;
00032                 class LinearRing;
00033                 class CoordinateSequence;
00034                 class CoordinateSequence;
00035         }
00036         namespace index {
00037                 namespace bintree {
00038                         class Bintree;
00039                         class Interval;
00040                 }
00041                 namespace chain {
00042                         class MonotoneChain;
00043                 }
00044         }
00045 }
00046 
00047 namespace geos {
00048 namespace algorithm { // geos::algorithm
00049 
00050 class MCPointInRing: public PointInRing {
00051 public:
00052         MCPointInRing(const geom::LinearRing *newRing);
00053         ~MCPointInRing();
00054         bool isInside(const geom::Coordinate& pt);
00055         void testLineSegment(geom::Coordinate& p, geom::LineSegment *seg);
00056 
00057         class MCSelecter: public index::chain::MonotoneChainSelectAction {
00058         using MonotoneChainSelectAction::select;
00059         private:
00060                 geom::Coordinate p;
00061                 MCPointInRing *parent;
00062         public:
00063                 MCSelecter(const geom::Coordinate& newP, MCPointInRing *prt);
00064                 void select(geom::LineSegment *ls);
00065         };
00066 
00067 private:
00068         const geom::LinearRing *ring;
00069         index::bintree::Interval interval;
00070         geom::CoordinateSequence *pts;
00071         index::bintree::Bintree *tree;
00072         int crossings;  // number of segment/ray crossings
00073         void buildIndex();
00074         void testMonotoneChain(geom::Envelope *rayEnv,
00075                         MCSelecter *mcSelecter,
00076                         index::chain::MonotoneChain *mc);
00077 };
00078 
00079 } // namespace geos::algorithm
00080 } // namespace geos
00081 
00082 #endif // GEOS_ALGORITHM_MCPOINTINRING_H
00083 
00084 /**********************************************************************
00085  * $Log$
00086  * Revision 1.4  2006/03/29 11:52:00  strk
00087  * const correctness, useless heap allocations removal
00088  *
00089  * Revision 1.3  2006/03/22 18:12:31  strk
00090  * indexChain.h header split.
00091  *
00092  * Revision 1.2  2006/03/22 16:01:33  strk
00093  * indexBintree.h header split, classes renamed to match JTS
00094  *
00095  * Revision 1.1  2006/03/09 16:46:48  strk
00096  * geos::geom namespace definition, first pass at headers split
00097  *
00098  **********************************************************************/
00099 

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