EdgeEnd.h

/**********************************************************************
 *
 * GEOS - Geometry Engine Open Source
 * http://geos.osgeo.org
 *
 * Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
 * Copyright (C) 2005-2006 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: geomgraph/EdgeEnd.java r428 (JTS-1.12+)
 *
 **********************************************************************/
 
 
#pragma once
 
#include <geos/export.h>
#include <geos/geom/Coordinate.h>  // for p0,p1
#include <geos/geomgraph/Label.h>  // for composition
 
#include <string>
 
// Forward declarations
namespace geos {
namespace algorithm {
class BoundaryNodeRule;
}
namespace geomgraph {
class Edge;
class Node;
}
}
 
namespace geos {
namespace geomgraph { // geos.geomgraph
 
class GEOS_DLL EdgeEnd {
 
public:
 
    friend std::ostream& operator<< (std::ostream&, const EdgeEnd&);
 
    EdgeEnd();
 
    virtual
    ~EdgeEnd() {}
 
    EdgeEnd(Edge* newEdge, const geom::Coordinate& newP0,
            const geom::Coordinate& newP1,
            const Label& newLabel);
 
    EdgeEnd(Edge* newEdge, const geom::Coordinate& newP0,
            const geom::Coordinate& newP1);
 
    Edge*
    getEdge()
    {
        return edge;
    }
    //virtual Edge* getEdge() { return edge; }
 
    Label&
    getLabel()
    {
        return label;
    }
 
    const Label&
    getLabel() const
    {
        return label;
    }
 
    virtual geom::Coordinate& getCoordinate() {
        return p0;
    }
 
    const geom::Coordinate&
    getCoordinate() const
    {
        return p0;
    }
 
    virtual geom::Coordinate& getDirectedCoordinate();
 
    virtual int getQuadrant();
 
    virtual double getDx();
 
    virtual double getDy();
 
    virtual void setNode(Node* newNode);
 
    virtual Node* getNode();
 
    virtual int compareTo(const EdgeEnd* e) const;
 
    virtual int compareDirection(const EdgeEnd* e) const;
 
    virtual void computeLabel(const algorithm::BoundaryNodeRule& bnr);
 
    virtual std::string print() const;
 
protected:
 
    Edge* edge;// the parent edge of this edge end
 
    Label label;
 
    EdgeEnd(Edge* newEdge);
 
    virtual void init(const geom::Coordinate& newP0,
                      const geom::Coordinate& newP1);
 
private:
 
    Node* node;
 
    geom::Coordinate p0, p1;
 
    double dx, dy;
 
    int quadrant;
};
 
std::ostream& operator<< (std::ostream&, const EdgeEnd&);
 
struct GEOS_DLL  EdgeEndLT {
    bool
    operator()(const EdgeEnd* s1, const EdgeEnd* s2) const
    {
        return s1->compareTo(s2) < 0;
    }
};
 
} // namespace geos.geomgraph
} // namespace geos