TrackTrajectory.h

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// ================================================
// TrackTrajectory class description
// ================================================
//
// THIS TEXT TO BE REPLACED BY ATLAS STANDARD FORMAT
//
//
// This version....
//
//
// Namespace Atlfast::
//
// class: TrackTrajectory
//
// Description: 
//
//  Simple concrete class to represent a track trajectory
//   
// ................................................................
//

#ifndef ATLFAST_TRACKTRAJECTORY_H
#define ATLFAST_TRACKTRAJECTORY_H


#include "AtlfastEvent/Phi.h"
#include "CLHEP/Vector/ThreeVector.h"
#include "CLHEP/Geometry/Point3D.h"

#include "AtlfastEvent/TrackParameters.h"

namespace Atlfast {
  class TrackTrajectory {
    
  private:
    
    // Trajectory state variables
    TrackParameters m_parameters;
    ::HepPoint3D m_startPoint ; 
    double m_curvature ;
    
  public:
    
    TrackTrajectory() {}
    TrackTrajectory( TrackParameters, ::HepPoint3D, double);
    
    TrackTrajectory( 
                    const Hep3Vector& p, 
                    const Hep3Vector& vertex,  
                    double charge, 
                    double bField 
                    );
    
    TrackTrajectory( const TrackTrajectory& src ) ;
    
    ~TrackTrajectory() ;
    
    TrackTrajectory& operator=( const TrackTrajectory& src ) ;
    TrackParameters  parameters() const;
    
    int    signOfCharge()    const ;
    HepPoint3D startPoint()  const ; 
    double radius()          const ;
    double curvature()       const ;
    
  };

  // ................................................
  // Message stream operator for simple debug output
  
  MsgStream& operator << ( MsgStream& s, const TrackTrajectory& t ) ;
  std::ostream& operator << ( std::ostream& s, const TrackTrajectory& t ) ;

  
} // End namespace

#endif

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