// -------------------------------------------------------------------------
// -----                  CbmTrackPropagator header file               -----
// -----                  Created 16/07/07  by A. Lebedev               -----
// -------------------------------------------------------------------------


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

#ifndef CBMTRACKPROPAGATOR_H
#define CBMTRACKPROPAGATOR_H

#include "CbmTool.h"

class CbmTrackParam;

class CbmTrackPropagator : public CbmTool {

public:
   
   // constructor
   CbmTrackPropagator();
   CbmTrackPropagator(const std::string& name);
   
   // distructor
   virtual ~CbmTrackPropagator();
   
   // Pure virtual functions for track parameters propagation
   virtual void Propagate( const CbmTrackParam *pParamIn,
                                 CbmTrackParam *pParamOut,
                                 Double_t zOut) = 0;
                                 
   virtual void Propagate( CbmTrackParam *pParam, 
                           Double_t zOut ) = 0;
      
   ClassDef(CbmTrackPropagator,1)
}; 

#endif //CbmTrackPropagator