// -------------------------------------------------------------------------
//			Created by M. Al-Turany  06.02.2007
// -------------------------------------------------------------------------

/**
 ** Parameters (x, y, tx, ty, q/p) of Parabola track 
 */


#ifndef CBMSTSTRACKPARP
#define CBMSTSTRACKPARP 1
#include "TVector3.h"
#include "CbmTrackPar.h"

class CbmTrackParP : public CbmTrackPar
{

 public:

  /** Constructor **/
  CbmTrackParP();

  /** Constructor with all track variables **/
  CbmTrackParP(Double_t x,  Double_t y,  Double_t z,
		Double_t tx, Double_t ty, Double_t qp,
		Double_t CovMatrix[15]);

  /** Constructor with position and momentum track **/
  CbmTrackParP(TVector3 pos, TVector3 Mom, TVector3 posErr, TVector3 MomErr, Double_t q);

 
  /** Destructor **/
  virtual ~CbmTrackParP();
  
  /** copy Constructor **/
  CbmTrackParP(CbmTrackPar &Trkbase);


  /** Output to screen **/
  void Print();


  /** Accessors **/
  Double_t GetTx() const { return fTx; };
  Double_t GetTy() const { return fTy; };
  Double_t GetDTx() const { return fDTx; };
  Double_t GetDTy() const { return fDTy; };
  
  Double_t *GetCov(){return fCovMatrix;};

  /** Modifiers **/
  void SetTx(Double_t tx) { fTx = tx; };
  void SetTy(Double_t ty) { fTy = ty; };
  
  virtual Double_t GetDX()  ;
  virtual Double_t GetDY()  ;
  virtual Double_t GetDZ()  ;
  virtual Double_t GetDPx() ;
  virtual Double_t GetDPy() ;
  virtual Double_t GetDPz() ;
  virtual Double_t GetDQp() ;

  void GetCov(Double_t *Cov) {for(Int_t i=0;i<15;i++) Cov[i]=fCovMatrix[i];}
  void SetTrackPar(Double_t X,  Double_t Y,  Double_t Z,
		Double_t Px, Double_t Py, Double_t Pz, Double_t Q,
		Double_t  CovMatrix[15]);
  void Reset();
 private:

  /** Direction of track tx = dx/dz; ty = dy/dz **/
  Double_t fTx, fTy;
  /** Error in directions*/
  Double_t fDTx, fDTy;
  /** Covariant matrix*/
  Double_t fCovMatrix[15];
  /** calculate the cov. matrix*/
  void CalCov();

  ClassDef(CbmTrackParP,1);

};


#endif