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# PolygonizeDirectedEdge.h

    00001 /**********************************************************************
    00002  * $Id: PolygonizeDirectedEdge.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  * 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
    00018 #ifndef GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H
    00019 #define GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H
    00020
    00021 #include <geos/planargraph/DirectedEdge.h> // for inheritance
    00022
    00023 // Forward declarations
    00024 namespace geos {
    00025         namespace geom {
    00026                 //class LineString;
    00027         }
    00028         namespace planargraph {
    00029                 class Node;
    00030         }
    00031         namespace operation {
    00032                 namespace polygonize {
    00033                         class EdgeRing;
    00034                 }
    00035         }
    00036 }
    00037
    00038 namespace geos {
    00039 namespace operation { // geos::operation
    00040 namespace polygonize { // geos::operation::polygonize
    00041
    00049 class PolygonizeDirectedEdge: public planargraph::DirectedEdge {
    00050
    00051 private:
    00052
    00053         EdgeRing *edgeRing;
    00054
    00055         PolygonizeDirectedEdge *next;
    00056
    00057         long label;
    00058
    00059 public:
    00060
    00061         /*
    00062          * \brief
    00063          * Constructs a directed edge connecting the <code>from</code> node
    00064          * to the <code>to</code> node.
    00065          *
    00066          * @param directionPt
    00067          *    specifies this DirectedEdge's direction (given by an imaginary
    00068          *    line from the <code>from</code> node to <code>directionPt</code>)
    00069          *
    00070          * @param edgeDirection
    00071          *    whether this DirectedEdge's direction is the same as or
    00072          *    opposite to that of the parent Edge (if any)
    00073          */
    00074         PolygonizeDirectedEdge(planargraph::Node *newFrom,
    00075                         planargraph::Node *newTo,
    00076                         const geom::Coordinate& newDirectionPt,
    00077                         bool nEdgeDirection);
    00078
    00079         /*
    00080          * Returns the identifier attached to this directed edge.
    00081          */
    00082         long getLabel() const;
    00083
    00084         /*
    00085          * Attaches an identifier to this directed edge.
    00086          */
    00087         void setLabel(long newLabel);
    00088
    00089         /*
    00090          * Returns the next directed edge in the EdgeRing that this
    00091          * directed edge is a member of.
    00092          */
    00093         PolygonizeDirectedEdge* getNext() const;
    00094
    00095         /*
    00096          * Sets the next directed edge in the EdgeRing that this
    00097          * directed edge is a member of.
    00098          */
    00099         void setNext(PolygonizeDirectedEdge *newNext);
    00100
    00101         /*
    00102          * Returns the ring of directed edges that this directed edge is
    00103          * a member of, or null if the ring has not been set.
    00104          * @see #setRing(EdgeRing)
    00105          */
    00106         bool isInRing() const;
    00107
    00108         /*
    00109          * Sets the ring of directed edges that this directed edge is
    00110          * a member of.
    00111          */
    00112         void setRing(EdgeRing *newEdgeRing);
    00113 };
    00114 } // namespace geos::operation::polygonize
    00115 } // namespace geos::operation
    00116 } // namespace geos
    00117
    00118 #endif // GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H
    00119
    00120 /**********************************************************************
    00121  * $Log$
    00122  * Revision 1.1  2006/03/22 11:19:06  strk
    00123  * opPolygonize.h headers split.
    00124  *
    00125  **********************************************************************/