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VfTrack.h

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//=======================================================================
// Auxilary class to store track paramters for vertex fits
//
// This is thought to be an interface between a concrete
// implementation of tracks (e.g. ALPHA tracks) and the
// geometrical track data
//
// K. Huettmann 11/2001
//=======================================================================

#ifndef _VFTRACK_H_
#define _VFTRACK_H_

#include "CLHEP/Matrix/SymMatrix.h"
#include "QvecBase.h"

class VfTrack {
public:
  VfTrack(){};                            // default constructor
  VfTrack(QvecBase*){};                   // create VfTrack form an ALPHA track
  virtual ~VfTrack(){}
  virtual void setTrackParameters(QvecBase*)=0; 
  // access to data which is needed for the vertex fit
  virtual float cov_matrix(int m,int n)const = 0;
  virtual const HepSymMatrix& cov_matrix()const = 0;
  virtual float mass()const = 0;
  virtual int charge()const = 0;
  
}; 

#endif

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