[u/mrichter/AliRoot.git] / ITS / AliITStrackV2.h

#ifndef ALIITSTRACKV2_H
#define ALIITSTRACKV2_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 * See cxx source for full Copyright notice                               */

//-------------------------------------------------------------------------
//                       ITS Track Class
//
//        Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch 
//     dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
//-------------------------------------------------------------------------


/*****************************************************************************
 *                          December 18, 2000                                *
 *  Internal view of the ITS track parametrisation as well as the order of   *
 *           track parameters are subject for possible changes !             *
 *  Use GetExternalParameters() and GetExternalCovariance() to access ITS    *
 *      track information regardless of its internal representation.         *
 * This formation is now fixed in the following way:                         *
 *      external param0:   local Y-coordinate of a track (cm)                *
 *      external param1:   local Z-coordinate of a track (cm)                *
 *      external param2:   local sine of the track momentum azimuthal angle  *
 *      external param3:   tangent of the track momentum dip angle           *
 *      external param4:   1/pt (1/(GeV/c))                                  *
 *****************************************************************************/

#include <AliKalmanTrack.h>

#include "AliITSrecoV2.h"

class AliESDtrack;

//_____________________________________________________________________________
class AliITStrackV2 : public AliKalmanTrack {
public:
  AliITStrackV2();
  AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *);
  AliITStrackV2(const AliITStrackV2& t);
  Int_t PropagateToVertex(Double_t d=0., Double_t x0=0.);
  Int_t Propagate(Double_t alpha, Double_t xr);
  Int_t CorrectForMaterial(Double_t d, Double_t x0=21.82);
  Int_t PropagateTo(Double_t xr, Double_t d, Double_t x0=21.82);
  Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
  Int_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
  void SetdEdx(Double_t dedx) {fdEdx=dedx;}
  void SetSampledEdx(Float_t q, Int_t i);
  void CookdEdx(Double_t low=0., Double_t up=0.51);
  void SetDetectorIndex(Int_t i) {SetLabel(i);}
  void ResetCovariance();
  void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
  void UpdateESDtrack(ULong_t flags);
  void SetConstrainedESDtrack(Double_t chi2); 

  void SetReconstructed(Bool_t sr=kTRUE){fReconstructed = sr;}
  Bool_t GetReconstructed() const {return fReconstructed;}
  void SetChi2MIP(Int_t i,Float_t val){fChi2MIP[i]=val;}
  Float_t GetChi2MIP(Int_t i) const {return fChi2MIP[i];}  
  void IncrementNSkipped(){fNSkipped++;} // increment by 1 the # of skipped cls
  Int_t GetNSkipped() const {return fNSkipped;}
  void IncrementNUsed(){fNUsed++;} // increment by 1 the # of shared clusters
  Int_t GetNUsed() const {return fNUsed;}
  AliESDtrack *GetESDtrack() const {return fESDtrack;}
  Double_t GetCov33() const {return fC33;} // cov. matrix el. 3,3
  Double_t GetCov44() const {return fC44;} // cov. matrix el. 4,4
  Float_t GetDy(Int_t i) const {return fDy[i];}
  Float_t GetDz(Int_t i) const {return fDz[i];}
  Float_t GetSigmaY(Int_t i) const {return fSigmaY[i];}
  Float_t GetSigmaZ(Int_t i) const {return fSigmaZ[i];}

  Int_t GetDetectorIndex() const {return GetLabel();}
  Double_t GetX()    const {return fX;}
  Double_t GetAlpha()const {return fAlpha;}
  Double_t GetdEdx() const {return fdEdx;}
  Double_t GetPIDsignal() const {return GetdEdx();}
  Double_t GetY()    const {return fP0;}
  Double_t GetZ()    const {return fP1;}
  Double_t GetSnp()  const {return fP2;}
  Double_t GetTgl()  const {return fP3;}
  Double_t GetC()    const {return fP4;}
  Double_t
    Get1Pt() const { return (1e-9*TMath::Abs(fP4)/fP4 + fP4)*GetConvConst(); }
  Double_t GetD(Double_t x=0, Double_t y=0) const;
  Double_t GetZat(Double_t x=0) const;

  Double_t GetSigmaY2() const {return fC00;}
  Double_t GetSigmaZ2() const {return fC11;}
  Int_t Compare(const TObject *o) const;
  void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
  void GetExternalCovariance(Double_t cov[15]) const ;
  Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
  Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
  Double_t GetPredictedChi2(const AliCluster *cluster) const;
  Int_t Invariant() const;
 
  AliITStrackV2& operator=(const AliITStrackV2& /*t*/) {
    Error("operator=","Assignment is not allowed !"); return *this;
  }

protected:
  Double_t fX;              // X-coordinate of this track (reference plane)
  Double_t fAlpha;          // rotation angle

  Double_t fdEdx;           // dE/dx

  Double_t fP0;             // Y-coordinate of a track 
  Double_t fP1;             // Z-coordinate of a track
  Double_t fP2;             // sine of the track momentum azimuthal angle
  Double_t fP3;             // tangent of the track momentum dip angle
  Double_t fP4;             // track curvature

  Double_t fC00;                         // covariance
  Double_t fC10, fC11;                   // matrix
  Double_t fC20, fC21, fC22;             // of the
  Double_t fC30, fC31, fC32, fC33;       // track
  Double_t fC40, fC41, fC42, fC43, fC44; // parameters 
  Int_t fNUsed;                          // number of shared clusters
  Int_t fNSkipped;                       // number of skipped clusters
  Bool_t fReconstructed;                 // reconstructed - accepted flag
  Float_t fChi2MIP[6];                   // MIP chi squres 
  UInt_t fIndex[kMaxLayer]; // indices of associated clusters 
  Float_t fdEdxSample[4];   // array of dE/dx samples b.b.
  Float_t fDy[6];           //dy in layer
  Float_t fDz[6];           //dz in layer
  Float_t fSigmaY[6];       //sigma y 
  Float_t fSigmaZ[6];       //sigma z
  AliESDtrack *fESDtrack;   //! pointer to the connected ESD track

  ClassDef(AliITStrackV2,3)   //ITS reconstructed track
};

inline 
void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
  //---------------------------------------------------------------------
  // This function return external ITS track representation
  //---------------------------------------------------------------------
     xr=fX;          
     x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
}

inline
void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
  //----------------------------------------------------------------------
  // This function stores dEdx sample corrected for the track segment length 
  // Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
  //----------------------------------------------------------------------
  if (i<0) return;
  if (i>3) return;
  Double_t s=GetSnp(), t=GetTgl();
  q *= TMath::Sqrt((1-s*s)/(1+t*t));
  fdEdxSample[i]=q;
}
#endif
Commit	Line	Data
006b5f7f	1	#ifndef ALIITSTRACKV2_H
	2	#define ALIITSTRACKV2_H
	3	/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	4	* See cxx source for full Copyright notice */
	5
	6	//-------------------------------------------------------------------------
	7	// ITS Track Class
	8	//
	9	// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
a9a2d814	10	// dEdx analysis by: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
006b5f7f	11	//-------------------------------------------------------------------------
	12
	13
	14	/*****************************************************************************
	15	* December 18, 2000 *
	16	* Internal view of the ITS track parametrisation as well as the order of *
	17	* track parameters are subject for possible changes ! *
	18	* Use GetExternalParameters() and GetExternalCovariance() to access ITS *
	19	* track information regardless of its internal representation. *
	20	* This formation is now fixed in the following way: *
	21	* external param0: local Y-coordinate of a track (cm) *
	22	* external param1: local Z-coordinate of a track (cm) *
	23	* external param2: local sine of the track momentum azimuthal angle *
	24	* external param3: tangent of the track momentum dip angle *
	25	* external param4: 1/pt (1/(GeV/c)) *
	26	*****************************************************************************/
	27
	28	#include <AliKalmanTrack.h>
	29
	30	#include "AliITSrecoV2.h"
	31
83d73500	32	class AliESDtrack;
006b5f7f	33
006b5f7f	34	//_____________________________________________________________________________
8676d691	35	class AliITStrackV2 : public AliKalmanTrack {
006b5f7f	36	public:
22b13da0	37	AliITStrackV2();
67c3dcbe	38	AliITStrackV2(AliESDtrack& t,Bool_t c=kFALSE) throw (const Char_t *);
006b5f7f	39	AliITStrackV2(const AliITStrackV2& t);
880f41b9	40	Int_t PropagateToVertex(Double_t d=0., Double_t x0=0.);
a9a2d814	41	Int_t Propagate(Double_t alpha, Double_t xr);
	42	Int_t CorrectForMaterial(Double_t d, Double_t x0=21.82);
	43	Int_t PropagateTo(Double_t xr, Double_t d, Double_t x0=21.82);
7f6ddf58	44	Int_t Update(const AliCluster* cl,Double_t chi2,UInt_t i);
8676d691	45	Int_t Improve(Double_t x0,Double_t xyz[3],Double_t ers[3]);
7f6ddf58	46	void SetdEdx(Double_t dedx) {fdEdx=dedx;}
a9a2d814	47	void SetSampledEdx(Float_t q, Int_t i);
a9a2d814	48	void CookdEdx(Double_t low=0., Double_t up=0.51);
006b5f7f	49	void SetDetectorIndex(Int_t i) {SetLabel(i);}
7f6ddf58	50	void ResetCovariance();
7f6ddf58	51	void ResetClusters() { SetChi2(0.); SetNumberOfClusters(0); }
83d73500	52	void UpdateESDtrack(ULong_t flags);
babd135a	53	void SetConstrainedESDtrack(Double_t chi2);
1aedd96e	54
	55	void SetReconstructed(Bool_t sr=kTRUE){fReconstructed = sr;}
	56	Bool_t GetReconstructed() const {return fReconstructed;}
	57	void SetChi2MIP(Int_t i,Float_t val){fChi2MIP[i]=val;}
	58	Float_t GetChi2MIP(Int_t i) const {return fChi2MIP[i];}
	59	void IncrementNSkipped(){fNSkipped++;} // increment by 1 the # of skipped cls
	60	Int_t GetNSkipped() const {return fNSkipped;}
	61	void IncrementNUsed(){fNUsed++;} // increment by 1 the # of shared clusters
	62	Int_t GetNUsed() const {return fNUsed;}
	63	AliESDtrack *GetESDtrack() const {return fESDtrack;}
	64	Double_t GetCov33() const {return fC33;} // cov. matrix el. 3,3
	65	Double_t GetCov44() const {return fC44;} // cov. matrix el. 4,4
	66	Float_t GetDy(Int_t i) const {return fDy[i];}
	67	Float_t GetDz(Int_t i) const {return fDz[i];}
	68	Float_t GetSigmaY(Int_t i) const {return fSigmaY[i];}
	69	Float_t GetSigmaZ(Int_t i) const {return fSigmaZ[i];}
	70
006b5f7f	71	Int_t GetDetectorIndex() const {return GetLabel();}
	72	Double_t GetX() const {return fX;}
	73	Double_t GetAlpha()const {return fAlpha;}
7f6ddf58	74	Double_t GetdEdx() const {return fdEdx;}
83d73500	75	Double_t GetPIDsignal() const {return GetdEdx();}
006b5f7f	76	Double_t GetY() const {return fP0;}
	77	Double_t GetZ() const {return fP1;}
	78	Double_t GetSnp() const {return fP2;}
	79	Double_t GetTgl() const {return fP3;}
67c3dcbe	80	Double_t GetC() const {return fP4;}
77f353c4	81	Double_t
77f353c4	82	Get1Pt() const { return (1e-9TMath::Abs(fP4)/fP4 + fP4)GetConvConst(); }
a6a6f799	83	Double_t GetD(Double_t x=0, Double_t y=0) const;
babd135a	84	Double_t GetZat(Double_t x=0) const;
babd135a	85
006b5f7f	86	Double_t GetSigmaY2() const {return fC00;}
006b5f7f	87	Double_t GetSigmaZ2() const {return fC11;}
006b5f7f	88	Int_t Compare(const TObject *o) const;
006b5f7f	89	void GetExternalParameters(Double_t& xr, Double_t x[5]) const ;
006b5f7f	90	void GetExternalCovariance(Double_t cov[15]) const ;
006b5f7f	91	Int_t GetClusterIndex(Int_t i) const {return fIndex[i];}
006b5f7f	92	Int_t GetGlobalXYZat(Double_t r,Double_t &x,Double_t &y,Double_t &z) const;
006b5f7f	93	Double_t GetPredictedChi2(const AliCluster *cluster) const;
006b5f7f	94	Int_t Invariant() const;
006b5f7f	95
1aedd96e	96	AliITStrackV2& operator=(const AliITStrackV2& /t/) {
	97	Error("operator=","Assignment is not allowed !"); return *this;
	98	}
	99
235b705f	100	protected:
006b5f7f	101	Double_t fX; // X-coordinate of this track (reference plane)
	102	Double_t fAlpha; // rotation angle
	103
	104	Double_t fdEdx; // dE/dx
	105
	106	Double_t fP0; // Y-coordinate of a track
	107	Double_t fP1; // Z-coordinate of a track
	108	Double_t fP2; // sine of the track momentum azimuthal angle
	109	Double_t fP3; // tangent of the track momentum dip angle
	110	Double_t fP4; // track curvature
	111
	112	Double_t fC00; // covariance
	113	Double_t fC10, fC11; // matrix
	114	Double_t fC20, fC21, fC22; // of the
	115	Double_t fC30, fC31, fC32, fC33; // track
	116	Double_t fC40, fC41, fC42, fC43, fC44; // parameters
babd135a	117	Int_t fNUsed; // number of shared clusters
	118	Int_t fNSkipped; // number of skipped clusters
	119	Bool_t fReconstructed; // reconstructed - accepted flag
	120	Float_t fChi2MIP[6]; // MIP chi squres
006b5f7f	121	UInt_t fIndex[kMaxLayer]; // indices of associated clusters
a9a2d814	122	Float_t fdEdxSample[4]; // array of dE/dx samples b.b.
babd135a	123	Float_t fDy[6]; //dy in layer
	124	Float_t fDz[6]; //dz in layer
	125	Float_t fSigmaY[6]; //sigma y
	126	Float_t fSigmaZ[6]; //sigma z
83d73500	127	AliESDtrack *fESDtrack; //! pointer to the connected ESD track
83d73500	128
babd135a	129	ClassDef(AliITStrackV2,3) //ITS reconstructed track
006b5f7f	130	};
	131
	132	inline
	133	void AliITStrackV2::GetExternalParameters(Double_t& xr, Double_t x[5]) const {
	134	//---------------------------------------------------------------------
83d73500	135	// This function return external ITS track representation
006b5f7f	136	//---------------------------------------------------------------------
	137	xr=fX;
	138	x[0]=GetY(); x[1]=GetZ(); x[2]=GetSnp(); x[3]=GetTgl(); x[4]=Get1Pt();
	139	}
a9a2d814	140
23efe5f1	141	inline
	142	void AliITStrackV2::SetSampledEdx(Float_t q, Int_t i) {
	143	//----------------------------------------------------------------------
a9a2d814	144	// This function stores dEdx sample corrected for the track segment length
a9a2d814	145	// Origin: Boris Batyunya, JINR, Boris.Batiounia@cern.ch
23efe5f1	146	//----------------------------------------------------------------------
a9a2d814	147	if (i<0) return;
a9a2d814	148	if (i>3) return;
23efe5f1	149	Double_t s=GetSnp(), t=GetTgl();
23efe5f1	150	q = TMath::Sqrt((1-ss)/(1+t*t));
23efe5f1	151	fdEdxSample[i]=q;
23efe5f1	152	}
006b5f7f	153	#endif
	154
	155