[u/mrichter/AliRoot.git] / TRD / AliTRDseedV1.h

#ifndef ALITRDSEEDV1_H
#define ALITRDSEEDV1_H
/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
* See cxx source for full Copyright notice                               */

/* $Id$ */

////////////////////////////////////////////////////////////////////////////
//                                                                        //
//  The TRD track seed                                                    //
//                                                                        //
////////////////////////////////////////////////////////////////////////////

#ifndef ROOT_TObject
#include "TObject.h"
#endif

#ifndef ROOT_TMath
#include "TMath.h"
#endif

#ifndef ALITRDGEOMETRY_H
#include "AliTRDgeometry.h"
#endif

#ifndef ALIPID_H
#include "AliPID.h"
#endif

#ifndef ALIRIEMAN_H
#include "AliRieman.h"
#endif

#ifndef ALITRDCLUSTER_H 
#include "AliTRDcluster.h"
#endif

class TTreeSRedirector;

class AliRieman;

class AliTRDtrackingChamber;
class AliTRDtrackV1;
class AliTRDReconstructor;
class AliTRDseedV1 : public TObject //TODO we should inherit 
{                                   // AliTRDtrackletBase
public:
  enum ETRDtrackletBuffers {    
    kNtb = 32           // max clusters/pad row
   ,kNTimeBins = 2*kNtb // max number of clusters/tracklet
   ,kNSlices = 10       // max dEdx slices
  };

  // bits from 0-13 are reserved by ROOT (see TObject.h)
  enum ETRDtrackletStatus {
    kOwner      = BIT(14) // owner of its clusters
   ,kRowCross   = BIT(15) // pad row cross tracklet
   ,kCalib      = BIT(16) // calibrated tracklet
   ,kKink       = BIT(17) // kink prolongation tracklet
   ,kStandAlone = BIT(18)
  };

  AliTRDseedV1(Int_t det = -1);
  ~AliTRDseedV1();
  AliTRDseedV1(const AliTRDseedV1 &ref);
  AliTRDseedV1& operator=(const AliTRDseedV1 &ref);

/*  Bool_t	  AttachClustersIter(
              AliTRDtrackingChamber *chamber, Float_t quality, 
              Bool_t kZcorr = kFALSE, AliTRDcluster *c=0x0);*/
  Bool_t	  AttachClusters(
              AliTRDtrackingChamber *chamber, Bool_t tilt = kFALSE);
  void      Bootstrap(const AliTRDReconstructor *rec);
  void      Calibrate();
  void      CookdEdx(Int_t nslices);
  void      CookLabels();
  Bool_t    Fit(Bool_t tilt=kTRUE, Int_t errors = 2);
//   void      FitMI();
  Bool_t    Init(AliTRDtrackV1 *track);
  inline void      Init(const AliRieman *fit);
  Bool_t    IsEqual(const TObject *inTracklet) const;
  Bool_t    IsCalibrated() const     { return TestBit(kCalib);}
  Bool_t    IsOwner() const          { return TestBit(kOwner);}
  Bool_t    IsKink() const           { return TestBit(kKink);}
  Bool_t    IsOK() const             { return fN2 > 4 && fNUsed < 4;}
  Bool_t    IsRowCross() const       { return TestBit(kRowCross);}
  Bool_t    IsUsable(Int_t i) const  { return fClusters[i] && !fClusters[i]->IsUsed();}
  Bool_t    IsStandAlone() const     { return TestBit(kStandAlone);}

  Float_t   GetC() const             { return fC; }
  Float_t   GetChi2() const          { return fChi2; }
  inline Float_t   GetChi2Z() const;
  inline Float_t   GetChi2Y() const;
  inline Float_t   GetChi2Phi() const;
  static void      GetClusterXY(const AliTRDcluster *c, Double_t &x, Double_t &y);
  void      GetCovAt(Double_t x, Double_t *cov) const;
  void      GetCovXY(Double_t *cov) const { memcpy(cov, &fCov[0], 3*sizeof(Double_t));}
  void      GetCovRef(Double_t *cov) const { memcpy(cov, &fRefCov[0], 3*sizeof(Double_t));}
  Float_t   GetdX() const            { return fdX;}
  Float_t*  GetdEdx()                { return &fdEdx[0];}
  Float_t   GetdQdl(Int_t ic) const;
  Int_t     GetDetector() const      { return fDet;}
  void      GetCalibParam(Float_t &exb, Float_t &vd, Float_t &t0, Float_t &s2, Float_t &dl, Float_t &dt) const    { 
              exb = fExB; vd = fVD; t0 = fT0; s2 = fS2PRF; dl = fDiffL; dt = fDiffT;}
  AliTRDcluster*  GetClusters(Int_t i) const               { return i<0 || i>=kNTimeBins ? 0x0 : fClusters[i];}
  Int_t     GetIndexes(Int_t i) const{ return i<0 || i>=kNTimeBins ? -1 : fIndexes[i];}
  Int_t     GetLabels(Int_t i) const { return fLabels[i];}  
  Double_t  GetMomentum() const      { return fMom;}
  Int_t     GetN() const             { return fN2;}
  Int_t     GetN2() const            { return fN2;}
  Int_t     GetNUsed() const         { return fNUsed;}
  Float_t   GetQuality(Bool_t kZcorr) const;
  Float_t   GetPadLength() const     { return fPadLength;}
  Int_t     GetPlane() const         { return AliTRDgeometry::GetLayer(fDet);    }

  Float_t*  GetProbability();
  Float_t   GetS2Y() const           { return fS2Y;}
  Float_t   GetS2Z() const           { return fS2Z;}
  Float_t   GetSigmaY() const        { return fS2Y > 0. ? TMath::Sqrt(fS2Y) : 0.2;}
  Float_t   GetSnp() const           { return fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
  Float_t   GetTgl() const           { return fZref[1];}
  Float_t   GetTilt() const          { return fTilt;}
  Float_t   GetX0() const            { return fX0;}
  Float_t   GetX() const             { return fX0 - fX;}
  Float_t   GetY() const             { return fYfit[0] - fYfit[1] * fX;}
  Double_t  GetYat(Double_t x) const { return fYfit[0] - fYfit[1] * (fX0-x);}
  Float_t   GetYfit(Int_t id) const { return fYfit[id];}
  Float_t   GetYref(Int_t id) const { return fYref[id];}
  Float_t   GetZ() const            { return fZfit[0] - fZfit[1] * fX;}
  Double_t  GetZat(Double_t x) const { return fZfit[0] - fZfit[1] * (fX0-x);}
  Float_t   GetZfit(Int_t id) const { return fZfit[id];}
  Float_t   GetZref(Int_t id) const { return fZref[id];}
//   Long_t    GetUsabilityMap() const { return fUsable; }

  inline AliTRDcluster* NextCluster();
  inline AliTRDcluster* PrevCluster();
  void      Print(Option_t *o = "") const;
  inline void ResetClusterIter(Bool_t forward = kTRUE);
  void      Reset();

  void      SetC(Float_t c)         { fC = c;}
  void      SetChi2(Float_t chi2)   { fChi2 = chi2;}
  void      SetCovRef(const Double_t *cov) { memcpy(&fRefCov[0], cov, 3*sizeof(Double_t));}
  void      SetIndexes(Int_t i, Int_t idx) { fIndexes[i]  = idx; }
  void      SetLabels(Int_t *lbls)   { memcpy(fLabels, lbls, 3*sizeof(Int_t)); }
  void      SetKink(Bool_t k)        { SetBit(kKink, k);}
  void      SetStandAlone(Bool_t st) { SetBit(kStandAlone, st); }
  void      SetMomentum(Double_t mom){ fMom = mom;}
  void      SetOwner();
  void      SetTilt(Float_t tilt)    { fTilt = tilt; }
  void      SetPadLength(Float_t len){ fPadLength = len;}
  void      SetDetector(Int_t d)     { fDet = d;  }
  void      SetDX(Float_t inDX)      { fdX = inDX;}
  void      SetReconstructor(const AliTRDReconstructor *rec) {fReconstructor = rec;}
  void      SetX0(Float_t x0)        { fX0 = x0; }
  void      SetYref(Int_t i, Float_t y) { fYref[i]     = y;}
  void      SetZref(Int_t i, Float_t z) { fZref[i]     = z;}
//   void      SetUsabilityMap(Long_t um)  { fUsable = um; }
  void      UpDate(const AliTRDtrackV1* trk);
  void      UpdateUsed();
  void      UseClusters();

protected:
  void Copy(TObject &ref) const;

private:
  const AliTRDReconstructor *fReconstructor;//! local reconstructor
  AliTRDcluster  **fClusterIter;            //! clusters iterator
  Int_t            fIndexes[kNTimeBins];    //! Indexes
  Float_t          fExB;                    //! tg(a_L) @ tracklet location
  Float_t          fVD;                     //! drift velocity @ tracklet location
  Float_t          fT0;                     //! time 0 @ tracklet location
  Float_t          fS2PRF;                  //! sigma^2 PRF for xd->0 and phi=a_L 
  Float_t          fDiffL;                  //! longitudinal diffusion coefficient
  Float_t          fDiffT;                  //! transversal diffusion coefficient
  Char_t           fClusterIdx;             //! clusters iterator
//  ULong_t          fUsable;                 //! bit map of usable clusters
  UChar_t          fN2;                     // number of clusters attached
 UChar_t          fNUsed;                  // number of used usable clusters
  Short_t          fDet;                    // TRD detector
  Float_t          fTilt;                   // local tg of the tilt angle 
  Float_t          fPadLength;              // local pad length 
  AliTRDcluster   *fClusters[kNTimeBins];   // Clusters
  Float_t          fYref[2];                //  Reference y
  Float_t          fZref[2];                //  Reference z
  Float_t          fYfit[2];                //  Y fit position +derivation
  Float_t          fZfit[2];                //  Z fit position
  Float_t          fMom;                    //  Momentum estimate @ tracklet [GeV/c]
  Float_t          fdX;                     // length of time bin
  Float_t          fX0;                     // anode wire position
  Float_t          fX;                      // radial position of the tracklet
  Float_t          fY;                      // r-phi position of the tracklet
  Float_t          fZ;                      // z position of the tracklet
  Float_t          fS2Y;                    // estimated resolution in the r-phi direction 
  Float_t          fS2Z;                    // estimated resolution in the z direction 
  Float_t          fC;                      // Curvature
  Float_t          fChi2;                   // Global chi2  
  Float_t          fdEdx[kNSlices];         // dE/dx measurements for tracklet
  Float_t          fProb[AliPID::kSPECIES]; //  PID probabilities
  Int_t            fLabels[3];              // most frequent MC labels and total number of different labels
  Double_t         fRefCov[3];              // covariance matrix of the track in the yz plane
  Double_t         fCov[3];                 // covariance matrix of the tracklet in the xy plane

  ClassDef(AliTRDseedV1, 5)                 // The offline TRD tracklet 
};

//____________________________________________________________
inline Float_t AliTRDseedV1::GetChi2Z() const
{
  Double_t dz = fZref[0]-fZfit[0]; dz*=dz;
  Double_t cov[3]; GetCovAt(fX, cov);
  Double_t s2 = fRefCov[2]+cov[2];
  return s2 > 0. ? dz/s2 : 0.; 
}

//____________________________________________________________
inline Float_t AliTRDseedV1::GetChi2Y() const
{
  Double_t dy = fYref[0]-fYfit[0]; dy*=dy;
  Double_t cov[3]; GetCovAt(fX, cov);
  Double_t s2 = fRefCov[0]+cov[0];
  return s2 > 0. ? dy/s2 : 0.; 
}

//____________________________________________________________
inline Float_t AliTRDseedV1::GetChi2Phi() const
{
  Double_t dphi = fYref[1]-fYfit[1]; dphi*=dphi;
  Double_t cov[3]; GetCovAt(fX, cov);
  Double_t s2 = fRefCov[2]+cov[2];
  return s2 > 0. ? dphi/s2 : 0.; 
}

//____________________________________________________________
inline void AliTRDseedV1::Init(const AliRieman *rieman)
{
  fZref[0] = rieman->GetZat(fX0);
  fZref[1] = rieman->GetDZat(fX0);
  fYref[0] = rieman->GetYat(fX0);
  fYref[1] = rieman->GetDYat(fX0);
  fC       = rieman->GetC(); 
  fChi2    = rieman->GetChi2();
}

//____________________________________________________________
inline AliTRDcluster* AliTRDseedV1::NextCluster()
{
// Mimic the usage of STL iterators.
// Forward iterator

  fClusterIdx++; fClusterIter++;
  while(fClusterIdx < kNTimeBins){
    if(!(*fClusterIter)){ 
      fClusterIdx++; 
      fClusterIter++;
      continue;
    }
    return *fClusterIter;
  }
  return 0x0;
}

//____________________________________________________________
inline AliTRDcluster* AliTRDseedV1::PrevCluster()
{
// Mimic the usage of STL iterators.
// Backward iterator

  fClusterIdx--; fClusterIter--;
  while(fClusterIdx >= 0){
    if(!(*fClusterIter)){ 
      fClusterIdx--; 
      fClusterIter--;
      continue;
    }
    return *fClusterIter;
  }
  return 0x0;
}

//____________________________________________________________
inline void AliTRDseedV1::ResetClusterIter(Bool_t forward) 
{
// Mimic the usage of STL iterators.
// Facilitate the usage of NextCluster for forward like 
// iterator (kTRUE) and PrevCluster for backward like iterator (kFALSE)

  if(forward){
    fClusterIter = &fClusters[0]; fClusterIter--; 
    fClusterIdx=-1;
  } else {
    fClusterIter = &fClusters[kNTimeBins-1]; fClusterIter++; 
    fClusterIdx=kNTimeBins;
  }
}

#endif
Commit	Line	Data
e4f2f73d	1	#ifndef ALITRDSEEDV1_H
	2	#define ALITRDSEEDV1_H
	3	/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
e44586fb	4	* See cxx source for full Copyright notice */
e4f2f73d	5
	6	/* $Id$ */
	7
	8	////////////////////////////////////////////////////////////////////////////
	9	// //
	10	// The TRD track seed //
	11	// //
	12	////////////////////////////////////////////////////////////////////////////
	13
e3cf3d02	14	#ifndef ROOT_TObject
	15	#include "TObject.h"
	16	#endif
	17
	18	#ifndef ROOT_TMath
	19	#include "TMath.h"
e4f2f73d	20	#endif
e4f2f73d	21
ae4e8b84	22	#ifndef ALITRDGEOMETRY_H
	23	#include "AliTRDgeometry.h"
	24	#endif
	25
0906e73e	26	#ifndef ALIPID_H
	27	#include "AliPID.h"
	28	#endif
	29
e4f2f73d	30	#ifndef ALIRIEMAN_H
	31	#include "AliRieman.h"
	32	#endif
	33
f29f13a6	34	#ifndef ALITRDCLUSTER_H
	35	#include "AliTRDcluster.h"
	36	#endif
	37
e4f2f73d	38	class TTreeSRedirector;
	39
	40	class AliRieman;
	41
eb38ed55	42	class AliTRDtrackingChamber;
f3d3af1b	43	class AliTRDtrackV1;
3a039a31	44	class AliTRDReconstructor;
e3cf3d02	45	class AliTRDseedV1 : public TObject //TODO we should inherit
	46	{ // AliTRDtrackletBase
	47	public:
	48	enum ETRDtrackletBuffers {
	49	kNtb = 32 // max clusters/pad row
	50	,kNTimeBins = 2*kNtb // max number of clusters/tracklet
	51	,kNSlices = 10 // max dEdx slices
e44586fb	52	};
e3cf3d02	53
2e2915e7	54	// bits from 0-13 are reserved by ROOT (see TObject.h)
e3cf3d02	55	enum ETRDtrackletStatus {
f29f13a6	56	kOwner = BIT(14) // owner of its clusters
	57	,kRowCross = BIT(15) // pad row cross tracklet
	58	,kCalib = BIT(16) // calibrated tracklet
	59	,kKink = BIT(17) // kink prolongation tracklet
	60	,kStandAlone = BIT(18)
e44586fb	61	};
e44586fb	62
ae4e8b84	63	AliTRDseedV1(Int_t det = -1);
e44586fb	64	~AliTRDseedV1();
	65	AliTRDseedV1(const AliTRDseedV1 &ref);
	66	AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
	67
f29f13a6	68	/* Bool_t AttachClustersIter(
203967fc	69	AliTRDtrackingChamber *chamber, Float_t quality,
f29f13a6	70	Bool_t kZcorr = kFALSE, AliTRDcluster c=0x0);/
203967fc	71	Bool_t AttachClusters(
b1957d3c	72	AliTRDtrackingChamber *chamber, Bool_t tilt = kFALSE);
203967fc	73	void Bootstrap(const AliTRDReconstructor *rec);
e3cf3d02	74	void Calibrate();
203967fc	75	void CookdEdx(Int_t nslices);
e3cf3d02	76	void CookLabels();
d937ad7a	77	Bool_t Fit(Bool_t tilt=kTRUE, Int_t errors = 2);
f29f13a6	78	// void FitMI();
203967fc	79	Bool_t Init(AliTRDtrackV1 *track);
e44586fb	80	inline void Init(const AliRieman *fit);
203967fc	81	Bool_t IsEqual(const TObject *inTracklet) const;
e3cf3d02	82	Bool_t IsCalibrated() const { return TestBit(kCalib);}
e44586fb	83	Bool_t IsOwner() const { return TestBit(kOwner);}
f29f13a6	84	Bool_t IsKink() const { return TestBit(kKink);}
f29f13a6	85	Bool_t IsOK() const { return fN2 > 4 && fNUsed < 4;}
e44586fb	86	Bool_t IsRowCross() const { return TestBit(kRowCross);}
f29f13a6	87	Bool_t IsUsable(Int_t i) const { return fClusters[i] && !fClusters[i]->IsUsed();}
f29f13a6	88	Bool_t IsStandAlone() const { return TestBit(kStandAlone);}
e44586fb	89
e3cf3d02	90	Float_t GetC() const { return fC; }
	91	Float_t GetChi2() const { return fChi2; }
	92	inline Float_t GetChi2Z() const;
	93	inline Float_t GetChi2Y() const;
f29f13a6	94	inline Float_t GetChi2Phi() const;
d937ad7a	95	static void GetClusterXY(const AliTRDcluster *c, Double_t &x, Double_t &y);
e44586fb	96	void GetCovAt(Double_t x, Double_t *cov) const;
d937ad7a	97	void GetCovXY(Double_t cov) const { memcpy(cov, &fCov[0], 3sizeof(Double_t));}
ac6764f5	98	void GetCovRef(Double_t cov) const { memcpy(cov, &fRefCov[0], 3sizeof(Double_t));}
203967fc	99	Float_t GetdX() const { return fdX;}
203967fc	100	Float_t* GetdEdx() { return &fdEdx[0];}
e44586fb	101	Float_t GetdQdl(Int_t ic) const;
203967fc	102	Int_t GetDetector() const { return fDet;}
e3cf3d02	103	void GetCalibParam(Float_t &exb, Float_t &vd, Float_t &t0, Float_t &s2, Float_t &dl, Float_t &dt) const {
	104	exb = fExB; vd = fVD; t0 = fT0; s2 = fS2PRF; dl = fDiffL; dt = fDiffT;}
	105	AliTRDcluster* GetClusters(Int_t i) const { return i<0 \|\| i>=kNTimeBins ? 0x0 : fClusters[i];}
	106	Int_t GetIndexes(Int_t i) const{ return i<0 \|\| i>=kNTimeBins ? -1 : fIndexes[i];}
	107	Int_t GetLabels(Int_t i) const { return fLabels[i];}
203967fc	108	Double_t GetMomentum() const { return fMom;}
203967fc	109	Int_t GetN() const { return fN2;}
e3cf3d02	110	Int_t GetN2() const { return fN2;}
e3cf3d02	111	Int_t GetNUsed() const { return fNUsed;}
e44586fb	112	Float_t GetQuality(Bool_t kZcorr) const;
e3cf3d02	113	Float_t GetPadLength() const { return fPadLength;}
ae4e8b84	114	Int_t GetPlane() const { return AliTRDgeometry::GetLayer(fDet); }
ae4e8b84	115
e3cf3d02	116	Float_t* GetProbability();
	117	Float_t GetS2Y() const { return fS2Y;}
	118	Float_t GetS2Z() const { return fS2Z;}
	119	Float_t GetSigmaY() const { return fS2Y > 0. ? TMath::Sqrt(fS2Y) : 0.2;}
	120	Float_t GetSnp() const { return fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
	121	Float_t GetTgl() const { return fZref[1];}
	122	Float_t GetTilt() const { return fTilt;}
	123	Float_t GetX0() const { return fX0;}
	124	Float_t GetX() const { return fX0 - fX;}
5a7a515d	125	Float_t GetY() const { return fYfit[0] - fYfit[1] * fX;}
b1957d3c	126	Double_t GetYat(Double_t x) const { return fYfit[0] - fYfit[1] * (fX0-x);}
e3cf3d02	127	Float_t GetYfit(Int_t id) const { return fYfit[id];}
e3cf3d02	128	Float_t GetYref(Int_t id) const { return fYref[id];}
3658afdc	129	Float_t GetZ() const { return fZfit[0] - fZfit[1] * fX;}
b1957d3c	130	Double_t GetZat(Double_t x) const { return fZfit[0] - fZfit[1] * (fX0-x);}
e3cf3d02	131	Float_t GetZfit(Int_t id) const { return fZfit[id];}
e3cf3d02	132	Float_t GetZref(Int_t id) const { return fZref[id];}
f29f13a6	133	// Long_t GetUsabilityMap() const { return fUsable; }
e3cf3d02	134
ae4e8b84	135	inline AliTRDcluster* NextCluster();
71ea19a3	136	inline AliTRDcluster* PrevCluster();
e44586fb	137	void Print(Option_t *o = "") const;
71ea19a3	138	inline void ResetClusterIter(Bool_t forward = kTRUE);
e3cf3d02	139	void Reset();
ae4e8b84	140
e3cf3d02	141	void SetC(Float_t c) { fC = c;}
e3cf3d02	142	void SetChi2(Float_t chi2) { fChi2 = chi2;}
0849f128	143	void SetCovRef(const Double_t cov) { memcpy(&fRefCov[0], cov, 3sizeof(Double_t));}
e3cf3d02	144	void SetIndexes(Int_t i, Int_t idx) { fIndexes[i] = idx; }
e3cf3d02	145	void SetLabels(Int_t lbls) { memcpy(fLabels, lbls, 3sizeof(Int_t)); }
f29f13a6	146	void SetKink(Bool_t k) { SetBit(kKink, k);}
f29f13a6	147	void SetStandAlone(Bool_t st) { SetBit(kStandAlone, st); }
203967fc	148	void SetMomentum(Double_t mom){ fMom = mom;}
29b87567	149	void SetOwner();
e3cf3d02	150	void SetTilt(Float_t tilt) { fTilt = tilt; }
e3cf3d02	151	void SetPadLength(Float_t len){ fPadLength = len;}
203967fc	152	void SetDetector(Int_t d) { fDet = d; }
bee2b41e	153	void SetDX(Float_t inDX) { fdX = inDX;}
3a039a31	154	void SetReconstructor(const AliTRDReconstructor *rec) {fReconstructor = rec;}
e3cf3d02	155	void SetX0(Float_t x0) { fX0 = x0; }
	156	void SetYref(Int_t i, Float_t y) { fYref[i] = y;}
	157	void SetZref(Int_t i, Float_t z) { fZref[i] = z;}
f29f13a6	158	// void SetUsabilityMap(Long_t um) { fUsable = um; }
b1957d3c	159	void UpDate(const AliTRDtrackV1* trk);
e3cf3d02	160	void UpdateUsed();
e3cf3d02	161	void UseClusters();
e4f2f73d	162
d937ad7a	163	protected:
e44586fb	164	void Copy(TObject &ref) const;
e4f2f73d	165
e44586fb	166	private:
0ae89c5d	167	const AliTRDReconstructor *fReconstructor;//! local reconstructor
e3cf3d02	168	AliTRDcluster **fClusterIter; //! clusters iterator
	169	Int_t fIndexes[kNTimeBins]; //! Indexes
	170	Float_t fExB; //! tg(a_L) @ tracklet location
	171	Float_t fVD; //! drift velocity @ tracklet location
	172	Float_t fT0; //! time 0 @ tracklet location
	173	Float_t fS2PRF; //! sigma^2 PRF for xd->0 and phi=a_L
	174	Float_t fDiffL; //! longitudinal diffusion coefficient
	175	Float_t fDiffT; //! transversal diffusion coefficient
71ea19a3	176	Char_t fClusterIdx; //! clusters iterator
f29f13a6	177	// ULong_t fUsable; //! bit map of usable clusters
e3cf3d02	178	UChar_t fN2; // number of clusters attached
f29f13a6	179	UChar_t fNUsed; // number of used usable clusters
e3cf3d02	180	Short_t fDet; // TRD detector
	181	Float_t fTilt; // local tg of the tilt angle
	182	Float_t fPadLength; // local pad length
	183	AliTRDcluster *fClusters[kNTimeBins]; // Clusters
	184	Float_t fYref[2]; // Reference y
	185	Float_t fZref[2]; // Reference z
	186	Float_t fYfit[2]; // Y fit position +derivation
	187	Float_t fZfit[2]; // Z fit position
	188	Float_t fMom; // Momentum estimate @ tracklet [GeV/c]
e44586fb	189	Float_t fdX; // length of time bin
e3cf3d02	190	Float_t fX0; // anode wire position
	191	Float_t fX; // radial position of the tracklet
	192	Float_t fY; // r-phi position of the tracklet
	193	Float_t fZ; // z position of the tracklet
	194	Float_t fS2Y; // estimated resolution in the r-phi direction
	195	Float_t fS2Z; // estimated resolution in the z direction
	196	Float_t fC; // Curvature
	197	Float_t fChi2; // Global chi2
	198	Float_t fdEdx[kNSlices]; // dE/dx measurements for tracklet
	199	Float_t fProb[AliPID::kSPECIES]; // PID probabilities
	200	Int_t fLabels[3]; // most frequent MC labels and total number of different labels
6e4d4425	201	Double_t fRefCov[3]; // covariance matrix of the track in the yz plane
d937ad7a	202	Double_t fCov[3]; // covariance matrix of the tracklet in the xy plane
e4f2f73d	203
e3cf3d02	204	ClassDef(AliTRDseedV1, 5) // The offline TRD tracklet
e4f2f73d	205	};
	206
	207	//____________________________________________________________
e3cf3d02	208	inline Float_t AliTRDseedV1::GetChi2Z() const
e4f2f73d	209	{
e3cf3d02	210	Double_t dz = fZref[0]-fZfit[0]; dz*=dz;
	211	Double_t cov[3]; GetCovAt(fX, cov);
	212	Double_t s2 = fRefCov[2]+cov[2];
	213	return s2 > 0. ? dz/s2 : 0.;
e4f2f73d	214	}
	215
	216	//____________________________________________________________
e3cf3d02	217	inline Float_t AliTRDseedV1::GetChi2Y() const
e4f2f73d	218	{
e3cf3d02	219	Double_t dy = fYref[0]-fYfit[0]; dy*=dy;
	220	Double_t cov[3]; GetCovAt(fX, cov);
	221	Double_t s2 = fRefCov[0]+cov[0];
	222	return s2 > 0. ? dy/s2 : 0.;
e4f2f73d	223	}
e4f2f73d	224
f29f13a6	225	//____________________________________________________________
	226	inline Float_t AliTRDseedV1::GetChi2Phi() const
	227	{
	228	Double_t dphi = fYref[1]-fYfit[1]; dphi*=dphi;
	229	Double_t cov[3]; GetCovAt(fX, cov);
	230	Double_t s2 = fRefCov[2]+cov[2];
	231	return s2 > 0. ? dphi/s2 : 0.;
	232	}
	233
e4f2f73d	234	//____________________________________________________________
0906e73e	235	inline void AliTRDseedV1::Init(const AliRieman *rieman)
e4f2f73d	236	{
e44586fb	237	fZref[0] = rieman->GetZat(fX0);
	238	fZref[1] = rieman->GetDZat(fX0);
	239	fYref[0] = rieman->GetYat(fX0);
	240	fYref[1] = rieman->GetDYat(fX0);
55ef6967	241	fC = rieman->GetC();
55ef6967	242	fChi2 = rieman->GetChi2();
e4f2f73d	243	}
e4f2f73d	244
ae4e8b84	245	//____________________________________________________________
	246	inline AliTRDcluster* AliTRDseedV1::NextCluster()
	247	{
71ea19a3	248	// Mimic the usage of STL iterators.
	249	// Forward iterator
	250
ae4e8b84	251	fClusterIdx++; fClusterIter++;
e3cf3d02	252	while(fClusterIdx < kNTimeBins){
71ea19a3	253	if(!(*fClusterIter)){
	254	fClusterIdx++;
	255	fClusterIter++;
	256	continue;
	257	}
	258	return *fClusterIter;
	259	}
	260	return 0x0;
	261	}
	262
	263	//____________________________________________________________
	264	inline AliTRDcluster* AliTRDseedV1::PrevCluster()
	265	{
	266	// Mimic the usage of STL iterators.
	267	// Backward iterator
	268
	269	fClusterIdx--; fClusterIter--;
	270	while(fClusterIdx >= 0){
	271	if(!(*fClusterIter)){
	272	fClusterIdx--;
	273	fClusterIter--;
	274	continue;
	275	}
	276	return *fClusterIter;
	277	}
	278	return 0x0;
	279	}
	280
	281	//____________________________________________________________
	282	inline void AliTRDseedV1::ResetClusterIter(Bool_t forward)
	283	{
	284	// Mimic the usage of STL iterators.
	285	// Facilitate the usage of NextCluster for forward like
	286	// iterator (kTRUE) and PrevCluster for backward like iterator (kFALSE)
	287
	288	if(forward){
	289	fClusterIter = &fClusters[0]; fClusterIter--;
	290	fClusterIdx=-1;
	291	} else {
e3cf3d02	292	fClusterIter = &fClusters[kNTimeBins-1]; fClusterIter++;
e3cf3d02	293	fClusterIdx=kNTimeBins;
71ea19a3	294	}
ae4e8b84	295	}
ae4e8b84	296
e4f2f73d	297	#endif
e4f2f73d	298
47d5d320	299
6e49cfdb	300