Edge.h

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#ifndef LARDATAOBJ_RECOBASE_EDGE_H
#define LARDATAOBJ_RECOBASE_EDGE_H


// LArSoft libraries
#include "lardataobj/RecoBase/SpacePoint.h"

// C/C++ libraries
#include <limits> // std::numeric_limits<>
#include <iosfwd> // std::ostream

namespace recob
{
    
    class Edge
    {
    public:
        
        using ID_t = unsigned int;
        
        using SpacePointID_t = recob::SpacePoint::ID_t;
        
        static constexpr ID_t InvalidID = std::numeric_limits<ID_t>::max();
        
        
        Edge() = default;
        
        Edge(
          const double length,
          SpacePointID_t firstPointID, SpacePointID_t secondPointID,
          ID_t id = InvalidID
          );
        
        Edge(
          SpacePoint const& firstPoint, SpacePoint const& secondPoint,
          ID_t id = InvalidID
          );
        
        
        double Length() const
          { return fLength; }
        
        SpacePointID_t FirstPointID()  const
          { return fFirstPointID; }
        
        SpacePointID_t SecondPointID() const
          { return fSecondPointID; }
        
        ID_t ID() const
          { return fID; }
    
        
    private:
        
        double         fLength        = 0.0;
        SpacePointID_t fFirstPointID  = recob::SpacePoint::InvalidID;
        SpacePointID_t fSecondPointID = recob::SpacePoint::InvalidID;
        ID_t           fID            = InvalidID;
    
    }; // class Edge
    
    
    std::ostream&  operator << (std::ostream & o, const Edge& a);
    
    
    inline bool operator< (const Edge& a, const Edge& b)
      { return a.ID() < b.ID(); }
    inline bool operator< (const Edge& e, Edge::ID_t id)
      { return e.ID() < id; }
    inline bool operator< (Edge::ID_t id, const Edge& e)
      { return id < e.ID(); }
    
} // namespace recob



#endif // LARDATAOBJ_RECOBASE_EDGE_H