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//
//File: ExtMdcTrack.h
//Author: L.L.Wang
//
//Deccription: A class to get MDC reconstuction track,
//             and supply information to  track extrapolation.
//             It is only a interface.
//             
//History: 2005.7.4 created by L.L.Wang
//

#ifndef EXTMDCTRACK_H
#define EXTMDCTRACK_H
#include "CLHEP/Vector/ThreeVector.h"
#include "CLHEP/Matrix/SymMatrix.h"
#include "CLHEP/Geometry/Point3D.h"

#ifndef ENABLE_BACKWARDS_COMPATIBILITY
typedef HepGeom::Point3D<double> HepPoint3D;
#endif
#ifndef ENABLE_BACKWARDS_COMPATIBILITY
typedef HepGeom::Vector3D<double> HepVector3D;
#endif
      


#include "MdcRecEvent/RecMdcTrack.h"
#include "MdcRecEvent/RecMdcKalTrack.h"

using namespace std;

using namespace CLHEP;

static const int NdimMdcErr(5);
static const int NdimExtErr(6);
static const int NumHelixPar(5);

class ExtMdcTrack
{
        public:
                ExtMdcTrack(void);//Construction.
                ~ExtMdcTrack(void);//Destruction.

                void SetMsgFlag(bool aFlag) {myMsgFlag=aFlag;};
                bool SetMdcRecTrkCol(RecMdcTrackCol * aPointer);//Get RecMdcTrackCol from TDS.
                bool SetMdcKalTrkCol(RecMdcKalTrackCol * aPointer);//Get RecMdcTrackCol from TDS.
                bool SetParId(int pid) { myParID=pid; return true;};
                bool GetOneGoodTrk();//Get a good MdcRecTrk.
                bool ReadTrk(int pid);
                int GetTrackID() {return myTrackID;}//Get RecMdcTrackl ID.
                RecMdcTrack *GetMdcRecTrkPtr() const;//Get RecMdcTrackl pointer.
                const Hep3Vector GetPosition() const;//Get coordinate of the track at the Mdc->Tof point.
                const Hep3Vector GetMomentum() const;//Get the momentum of the track at the Mdc_>Tof point.
                const HepSymMatrix GetErrorMatrix() const;//Get 6x6 (x,p)Err matrix at the Mdc_>Tof point.
                double GetTrackLength() const;//Get the track length of the track at the Mdc->Tof point.
                inline double GetTrkTof() const {return myTrkTof;};
//              double GetTOF() const;//Get the Tof of the track at the Mdc->Tof point.
                double GetPt() const;//Get the pt of the track at the Mdc->Tof point.
                double GetParticleCharge() const;//Get the charge of the track(+1,-1).

        private:
                void Convert();//Convert data due to unit problem.
                bool myMsgFlag;
                int myTrackID;
                RecMdcTrackCol *myMdcTrackCol;
                RecMdcTrackCol::iterator myMdcRecTrkIter;//Iterater of MdcRecTrk.
                RecMdcKalTrackCol *myMdcKalTrackCol;
                RecMdcKalTrackCol::iterator myMdcKalTrkIter;//Iterater of MdcRecTrk.
                string myInputTrk;
                int myParID;
                
                HepVector myHelixPar;//Mdc reconstucted track's helix 5 parameters.
                HepPoint3D myPivot;//Pivot point of the MdcRecTrk' helix.
                HepSymMatrix myMdcErr;//Error matrix(5x5) of the MdcRecTrk's helix.
                double myPhiTerm;//Phi angle of the MdcRecTrk's helix at the Mdc.
                double myTrkLength;
                double myTrkTof;
                HepPoint3D myLPosition;
//              double myTrackLength[5];//Track length from Kalman fit.
//              string myParticleName;//Particle name used by GetTOF().
};


#endif

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