planargraph/DirectedEdge.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2001-2002 Vivid Solutions Inc.
 * Copyright (C) 2005-2006 Refractions Research 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.
 *
 **********************************************************************/
 
#ifndef GEOS_PLANARGRAPH_DIRECTEDEDGE_H
#define GEOS_PLANARGRAPH_DIRECTEDEDGE_H
 
#include <geos/export.h>
#include <geos/planargraph/GraphComponent.h> // for inheritance
#include <geos/geom/Coordinate.h> // for composition
 
#include <vector> // for typedefs
#include <list> // for typedefs
 
// Forward declarations
namespace geos {
        namespace planargraph { 
                class Edge;
                class Node;
        }
}
 
namespace geos {
namespace planargraph { // geos.planargraph

class GEOS_DLL DirectedEdge: public GraphComponent {
 
public:
 
  friend std::ostream& operator << (std::ostream&, const DirectedEdge&);
 
        typedef std::list<DirectedEdge *> NonConstList;
        typedef std::list<const DirectedEdge *> ConstList;
        typedef std::vector<DirectedEdge *> NonConstVect;
 
protected:
        Edge* parentEdge;
        Node* from;
        Node* to;
        geom::Coordinate p0, p1;
        DirectedEdge* sym;  // optional
        bool edgeDirection;
        int quadrant;
        double angle;
public:
 
        typedef std::vector<const DirectedEdge *> ConstVect;
        typedef std::vector<DirectedEdge *> Vect;

        static std::vector<Edge*>* toEdges(
                std::vector<DirectedEdge*>& dirEdges);

        static void toEdges( std::vector<DirectedEdge*>& dirEdges,
                        std::vector<Edge*>& parentEdges);

        DirectedEdge(Node *newFrom, Node *newTo,
                        const geom::Coordinate &directionPt,
                        bool newEdgeDirection);

        Edge* getEdge() const;

        void setEdge(Edge* newParentEdge);

        int getQuadrant() const;

        const geom::Coordinate& getDirectionPt() const;

        bool getEdgeDirection() const;

        Node* getFromNode() const;

        Node* getToNode() const;

        geom::Coordinate& getCoordinate() const;

        double getAngle() const;

        DirectedEdge* getSym() const;

        void setSym(DirectedEdge *newSym);

        int compareTo(const DirectedEdge* obj) const;

        int compareDirection(const DirectedEdge *e) const;

        std::string print() const;
 
};

bool pdeLessThan(DirectedEdge *first, DirectedEdge * second);

std::ostream& operator << (std::ostream&, const DirectedEdge&);
 
 
} // namespace geos::planargraph
} // namespace geos
 
#endif // GEOS_PLANARGRAPH_DIRECTEDEDGE_H