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.
 *
 **********************************************************************/
 
#pragma once
 
#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* const from;
    Node* const to;
    const geom::CoordinateXY p0, p1;
    DirectedEdge* sym;  // optional
    const 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::CoordinateXY& directionPt,
                 bool newEdgeDirection);
 
    Edge* getEdge() const;
 
    void setEdge(Edge* newParentEdge);
 
    int getQuadrant() const;
 
    const geom::CoordinateXY& getDirectionPt() const;
 
    bool getEdgeDirection() const;
 
    const Node* getFromNode() const;
    Node* getFromNode();
 
    const Node* getToNode() const;
    Node* getToNode();
 
    const geom::CoordinateXY& 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