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PolygonizeDirectedEdge.h

00001 /**********************************************************************
00002  * $Id: PolygonizeDirectedEdge.h 2567 2009-06-08 16:58:42Z strk $
00003  *
00004  * GEOS - Geometry Engine Open Source
00005  * http://geos.refractions.net
00006  *
00007  * Copyright (C) 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  * Last port: operation/polygonize/PolygonizeDirectedEdge.java rev. 1.4 (JTS-1.10)
00018  *
00019  **********************************************************************/
00020 
00021 
00022 #ifndef GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H
00023 #define GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H
00024 
00025 #include <geos/export.h>
00026 
00027 #include <geos/planargraph/DirectedEdge.h> // for inheritance
00028 
00029 // Forward declarations
00030 namespace geos {
00031         namespace geom { 
00032                 //class LineString;
00033         }
00034         namespace planargraph { 
00035                 class Node;
00036         }
00037         namespace operation { 
00038                 namespace polygonize { 
00039                         class EdgeRing;
00040                 }
00041         }
00042 }
00043 
00044 namespace geos {
00045 namespace operation { // geos::operation
00046 namespace polygonize { // geos::operation::polygonize
00047 
00055 class GEOS_DLL PolygonizeDirectedEdge: public planargraph::DirectedEdge {
00056 
00057 private:
00058 
00059         EdgeRing *edgeRing;
00060 
00061         PolygonizeDirectedEdge *next;
00062 
00063         long label;
00064 
00065 public:
00066 
00067         /*
00068          * \brief
00069          * Constructs a directed edge connecting the <code>from</code> node
00070          * to the <code>to</code> node.
00071          *
00072          * @param directionPt
00073          *    specifies this DirectedEdge's direction (given by an imaginary
00074          *    line from the <code>from</code> node to <code>directionPt</code>)
00075          *
00076          * @param edgeDirection
00077          *    whether this DirectedEdge's direction is the same as or
00078          *    opposite to that of the parent Edge (if any)
00079          */
00080         PolygonizeDirectedEdge(planargraph::Node *newFrom,
00081                         planargraph::Node *newTo,
00082                         const geom::Coordinate& newDirectionPt,
00083                         bool nEdgeDirection);
00084 
00085         /*
00086          * Returns the identifier attached to this directed edge.
00087          */
00088         long getLabel() const;
00089 
00090         /*
00091          * Attaches an identifier to this directed edge.
00092          */
00093         void setLabel(long newLabel);
00094 
00095         /*
00096          * Returns the next directed edge in the EdgeRing that this
00097          * directed edge is a member of.
00098          */
00099         PolygonizeDirectedEdge* getNext() const;
00100 
00101         /*
00102          * Sets the next directed edge in the EdgeRing that this
00103          * directed edge is a member of.
00104          */
00105         void setNext(PolygonizeDirectedEdge *newNext);
00106 
00107         /*
00108          * Returns the ring of directed edges that this directed edge is
00109          * a member of, or null if the ring has not been set.
00110          * @see #setRing(EdgeRing)
00111          */
00112         bool isInRing() const;
00113 
00114         /*
00115          * Sets the ring of directed edges that this directed edge is
00116          * a member of.
00117          */
00118         void setRing(EdgeRing *newEdgeRing);
00119 };
00120 } // namespace geos::operation::polygonize
00121 } // namespace geos::operation
00122 } // namespace geos
00123 
00124 #endif // GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H
00125 
00126 /**********************************************************************
00127  * $Log$
00128  * Revision 1.1  2006/03/22 11:19:06  strk
00129  * opPolygonize.h headers split.
00130  *
00131  **********************************************************************/

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