PolygonizeDirectedEdge.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2006 Refractions Research Inc.
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 *
 * This is free software; you can redistribute and/or modify it under
 * the terms of the GNU Lesser General Public Licence as published
 * by the Free Software Foundation. 
 * See the COPYING file for more information.
 *
 **********************************************************************
 *
 * Last port: operation/polygonize/PolygonizeDirectedEdge.java rev. 1.4 (JTS-1.10)
 *
 **********************************************************************/
 
 
#ifndef GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H
#define GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H
 
#include <geos/export.h>
 
#include <geos/planargraph/DirectedEdge.h> // for inheritance
 
// Forward declarations
namespace geos {
        namespace geom { 
                //class LineString;
        }
        namespace planargraph { 
                class Node;
        }
        namespace operation { 
                namespace polygonize { 
                        class EdgeRing;
                }
        }
}
 
namespace geos {
namespace operation { // geos::operation
namespace polygonize { // geos::operation::polygonize

class GEOS_DLL PolygonizeDirectedEdge: public planargraph::DirectedEdge {
 
private:
 
        EdgeRing *edgeRing;
 
        PolygonizeDirectedEdge *next;
 
        long label;
 
public:
 
        /*
         * \brief
         * Constructs a directed edge connecting the <code>from</code> node
         * to the <code>to</code> node.
         *
         * @param directionPt
         *    specifies this DirectedEdge's direction (given by an imaginary
         *    line from the <code>from</code> node to <code>directionPt</code>)
         *
         * @param edgeDirection
         *    whether this DirectedEdge's direction is the same as or
         *    opposite to that of the parent Edge (if any)
         */
        PolygonizeDirectedEdge(planargraph::Node *newFrom,
                        planargraph::Node *newTo,
                        const geom::Coordinate& newDirectionPt,
                        bool nEdgeDirection);
 
        /*
         * Returns the identifier attached to this directed edge.
         */
        long getLabel() const;
 
        /*
         * Attaches an identifier to this directed edge.
         */
        void setLabel(long newLabel);
 
        /*
         * Returns the next directed edge in the EdgeRing that this
         * directed edge is a member of.
         */
        PolygonizeDirectedEdge* getNext() const;
 
        /*
         * Sets the next directed edge in the EdgeRing that this
         * directed edge is a member of.
         */
        void setNext(PolygonizeDirectedEdge *newNext);
 
        /*
         * Returns the ring of directed edges that this directed edge is
         * a member of, or null if the ring has not been set.
         * @see #setRing(EdgeRing)
         */
        bool isInRing() const;
 
        /*
         * Sets the ring of directed edges that this directed edge is
         * a member of.
         */
        void setRing(EdgeRing *newEdgeRing);
};
} // namespace geos::operation::polygonize
} // namespace geos::operation
} // namespace geos
 
#endif // GEOS_OP_POLYGONIZE_POLYGONIZEDIRECTEDEDGE_H