[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

class TTreeSRedirector;

class AliRieman;

class AliTRDtrackingChamber;
class AliTRDcluster;
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
  };

  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    IsOK() const             { return fN2 > 4;}
  Bool_t    IsRowCross() const       { return TestBit(kRowCross);}
  Bool_t    IsUsable(Int_t i) const  { return TESTBIT(fUsable, i);}

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