// -------------------------------------------------------------------------
// -----                  CbmLitTrackPropagator header file               -----
// -----                  Created 04/06/08  by A. Lebedev               -----
// -------------------------------------------------------------------------


/** CbmLitTrackPropagator.h
 *@author A.Lebedev <alebedev@jinr.ru>
 **
 ** Base class for LIT all track propagation algorithms.
 ** Propagation algorithm has to take into account material and 
 ** may use CbmExtrapolation to extrapolate tracks between the material layers.
 **/ 

#ifndef CBMLITTRACKPROPAGATOR_H_
#define CBMLITTRACKPROPAGATOR_H_

#include "CbmLitTool.h"

#include "TMatrixD.h"

#include <vector>


class CbmLitTrackParam;

class CbmLitTrackPropagator : public CbmLitTool {

public:
   CbmLitTrackPropagator();
   CbmLitTrackPropagator(const std::string& name);
   virtual ~CbmLitTrackPropagator();
   
   // Pure virtual functions for track parameters propagation
   virtual LitStatus Propagate( 
		   const CbmLitTrackParam *parIn,
           CbmLitTrackParam *parOut,
           Double_t zOut,
           Int_t pdg) = 0;
                                 
   virtual LitStatus Propagate( 
		   CbmLitTrackParam *par, 
           Double_t zOut,
           Int_t pdg) = 0;
   
   virtual void TransportMatrix(
		   std::vector<Double_t>& F) = 0;
   
   virtual void TransportMatrix(
		   TMatrixD& F) = 0;
      
   ClassDef(CbmLitTrackPropagator,1)
}; 

#endif //CbmLitTrackPropagator