[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 offline tracklet                                              //
//                                                                        //
////////////////////////////////////////////////////////////////////////////

#ifndef ALITRDTRACKLETBASE_H
#include "AliTRDtrackletBase.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

#include "AliTRDReconstructor.h"

class TTreeSRedirector;
class TLinearFitter;

class AliRieman;

class AliTRDtrackingChamber;
class AliTRDtrackV1;
class AliTRDpadPlane;
class AliTRDseedV1 : public AliTRDtrackletBase
{
public:
  enum ETRDtrackletBuffers {    
    kNtb       = 31     // max clusters/pad row
   ,kNclusters = 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
   ,kPID        = BIT(16) // PID contributor
   ,kCalib      = BIT(17) // calibrated tracklet
   ,kKink       = BIT(18) // kink prolongation tracklet
   ,kStandAlone = BIT(19) // tracklet build during stand alone track finding
  };

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

  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    CookPID();
  Bool_t    Fit(Bool_t tilt=kFALSE, Bool_t zcorr=kFALSE);
  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    HasPID() const           { return TestBit(kPID);}
  Bool_t    IsOK() const             { return GetN() > 4 && GetNUsed() < 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;
  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, 7*sizeof(Double_t));}
  static Double_t GetCovSqrt(Double_t *c, Double_t *d);
  static Double_t GetCovInv(Double_t *c, Double_t *d);
  Float_t   GetdX() const            { return fdX;}
  Float_t*  GetdEdx()                { return &fdEdx[0];}
  Float_t   GetdQdl(Int_t ic, Float_t *dx=0x0) const;
  Float_t   GetdYdX() const          { return fYfit[1]; } 
  Float_t   GetdZdX() const          { return fZref[1]; }
  Int_t     GetdY() const            { return Int_t(GetY()/0.014);}
  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>=kNclusters ? 0x0 : fClusters[i];}
  static TLinearFitter*  GetFitterY();
  static TLinearFitter*  GetFitterZ();
  Int_t     GetIndexes(Int_t i) const{ return i<0 || i>=kNclusters ? -1 : fIndexes[i];}
  Int_t     GetLabels(Int_t i) const { return fLabels[i];}  
  Float_t   GetMomentum(Float_t *err = 0x0) const;
  Int_t     GetN() const             { return (Int_t)fN&0x1f;}
  Int_t     GetN2() const            { return GetN();}
  Int_t     GetNUsed() const         { return Int_t((fN>>5)&0x1f);}
  Int_t     GetNShared() const       { return Int_t((fN>>10)&0x1f);}
  Float_t   GetQuality(Bool_t kZcorr) const;
  Float_t   GetPadLength() const     { return fPad[0];}
  Float_t   GetPadWidth() const      { return fPad[1];}
  Int_t     GetPlane() const         { return AliTRDgeometry::GetLayer(fDet);    }

  Float_t*  GetProbability(Bool_t force=kFALSE);
  Float_t   GetPt() const            { return fPt; }
  inline Double_t  GetPID(Int_t is=-1) const;
  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]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
  Float_t   GetTilt() const          { return fPad[2];}
  UInt_t    GetTrackletWord() const  { return 0;}
  UShort_t  GetVolumeId() const;
  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];}
  Int_t     GetYbin() const          { return Int_t(GetY()/0.016);}
  Int_t     GetZbin() const          { return Int_t(GetZ()/fPad[0]);}

  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;}
  inline void SetCovRef(const Double_t *cov);
  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 = kTRUE){ SetBit(kKink, k);}
  void      SetPID(Bool_t k = kTRUE) { SetBit(kPID, k);}
  void      SetStandAlone(Bool_t st) { SetBit(kStandAlone, st); }
  void      SetPt(Double_t pt)       { fPt = pt;}
  void      SetOwner();
  void      SetPadPlane(AliTRDpadPlane *p);
  void      SetPadLength(Float_t l)  { fPad[0] = l;}
  void      SetPadWidth(Float_t w)   { fPad[1] = w;}
  void      SetTilt(Float_t tilt)    { fPad[2] = tilt; }
  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:
  inline void SetN(Int_t n);
  inline void SetNUsed(Int_t n);
  inline void SetNShared(Int_t n);

  const AliTRDReconstructor *fReconstructor;//! local reconstructor
  AliTRDcluster  **fClusterIter;            //! clusters iterator
  Int_t            fIndexes[kNclusters];    //! 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
  UShort_t         fN;                      // number of clusters attached/used/shared
  Short_t          fDet;                    // TRD detector
  AliTRDcluster   *fClusters[kNclusters];   // Clusters
  Float_t          fPad[3];                 // local pad definition : length/width/tilt 
  Float_t          fYref[2];                //  Reference y, dydx
  Float_t          fZref[2];                //  Reference z, dz/dx
  Float_t          fYfit[2];                //  Fit y, dy/dx
  Float_t          fZfit[2];                //  Fit z
  Float_t          fPt;                     //  Pt 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[7];              // covariance matrix of the track in the yz plane + the rest of the diagonal elements
  Double_t         fCov[3];                 // covariance matrix of the tracklet in the xy plane
  static TLinearFitter   *fgFitterY;
  static TLinearFitter   *fgFitterZ;

  ClassDef(AliTRDseedV1, 7)                 // 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 Double_t AliTRDseedV1::GetPID(Int_t is) const
{
  if(is<0) return fProb[AliPID::kElectron];
  if(is<AliPID::kSPECIES) return fProb[is];
  return 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);
  if(fReconstructor && fReconstructor->IsHLT()){
    fRefCov[0] = 1;
    fRefCov[2] = 10;
  }else{
    fRefCov[0] = rieman->GetErrY(fX0);
    fRefCov[2] = rieman->GetErrZ(fX0);
  }
  fC       = rieman->GetC(); 
  fChi2    = rieman->GetChi2();
}

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

  fClusterIdx++; fClusterIter++;
  while(fClusterIdx < kNclusters){
    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[kNclusters-1]; fClusterIter++; 
    fClusterIdx=kNclusters;
  }
}

//____________________________________________________________
inline void AliTRDseedV1::SetCovRef(const Double_t *cov)
{ 
// Copy some "important" covariance matrix elements
//  var(y)
// cov(y,z)  var(z)
//                  var(snp)
//                           var(tgl)
//                        cov(tgl, 1/pt)  var(1/pt)

  memcpy(&fRefCov[0], cov, 3*sizeof(Double_t)); // yz full covariance
  fRefCov[3] = cov[ 5];  // snp variance 
  fRefCov[4] = cov[ 9];  // tgl variance
  fRefCov[5] = cov[13];  // cov(tgl, 1/pt)
  fRefCov[6] = cov[14];  // 1/pt variance
}


//____________________________________________________________
inline void AliTRDseedV1::SetN(Int_t n)
{
  if(n<0 || n>= (1<<5)) return; 
  fN &= ~0x1f;
  fN |= n;
}

//____________________________________________________________
inline void AliTRDseedV1::SetNUsed(Int_t n)
{
  if(n<0 || n>= (1<<5)) return; 
  fN &= ~(0x1f<<5);
  n <<= 5; fN |= n;
}

//____________________________________________________________
inline void AliTRDseedV1::SetNShared(Int_t n)
{
  if(n<0 || n>= (1<<5)) return; 
  fN &= ~(0x1f<<10);
  n <<= 10; fN |= n;
}


#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	// //
3e778975	10	// The TRD offline tracklet //
e4f2f73d	11	// //
	12	////////////////////////////////////////////////////////////////////////////
	13
3e778975	14	#ifndef ALITRDTRACKLETBASE_H
3e778975	15	#include "AliTRDtrackletBase.h"
e3cf3d02	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
d07eec70	38	#include "AliTRDReconstructor.h"
d07eec70	39
e4f2f73d	40	class TTreeSRedirector;
f301a656	41	class TLinearFitter;
e4f2f73d	42
	43	class AliRieman;
	44
eb38ed55	45	class AliTRDtrackingChamber;
f3d3af1b	46	class AliTRDtrackV1;
eb2b4f91	47	class AliTRDpadPlane;
3e778975	48	class AliTRDseedV1 : public AliTRDtrackletBase
3e778975	49	{
e3cf3d02	50	public:
e3cf3d02	51	enum ETRDtrackletBuffers {
8d2bec9e	52	kNtb = 31 // max clusters/pad row
	53	,kNclusters = 2*kNtb // max number of clusters/tracklet
	54	,kNslices = 10 // max dEdx slices
e44586fb	55	};
e3cf3d02	56
2e2915e7	57	// bits from 0-13 are reserved by ROOT (see TObject.h)
e3cf3d02	58	enum ETRDtrackletStatus {
f29f13a6	59	kOwner = BIT(14) // owner of its clusters
f29f13a6	60	,kRowCross = BIT(15) // pad row cross tracklet
e20bef2b	61	,kPID = BIT(16) // PID contributor
	62	,kCalib = BIT(17) // calibrated tracklet
	63	,kKink = BIT(18) // kink prolongation tracklet
1fd9389f	64	,kStandAlone = BIT(19) // tracklet build during stand alone track finding
e44586fb	65	};
e44586fb	66
ae4e8b84	67	AliTRDseedV1(Int_t det = -1);
e44586fb	68	~AliTRDseedV1();
	69	AliTRDseedV1(const AliTRDseedV1 &ref);
	70	AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
	71
1fd9389f	72	Bool_t AttachClusters(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();
3e778975	77	Bool_t CookPID();
b72f4eaf	78	Bool_t Fit(Bool_t tilt=kFALSE, Bool_t zcorr=kFALSE);
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);}
e20bef2b	85	Bool_t HasPID() const { return TestBit(kPID);}
3e778975	86	Bool_t IsOK() const { return GetN() > 4 && GetNUsed() < 4;}
e44586fb	87	Bool_t IsRowCross() const { return TestBit(kRowCross);}
f29f13a6	88	Bool_t IsUsable(Int_t i) const { return fClusters[i] && !fClusters[i]->IsUsed();}
f29f13a6	89	Bool_t IsStandAlone() const { return TestBit(kStandAlone);}
e44586fb	90
e3cf3d02	91	Float_t GetC() const { return fC; }
	92	Float_t GetChi2() const { return fChi2; }
	93	inline Float_t GetChi2Z() const;
	94	inline Float_t GetChi2Y() const;
f29f13a6	95	inline Float_t GetChi2Phi() const;
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));}
16cca13f	98	void GetCovRef(Double_t cov) const { memcpy(cov, &fRefCov, 7sizeof(Double_t));}
bb2db46c	99	static Double_t GetCovSqrt(Double_t c, Double_t d);
bb2db46c	100	static Double_t GetCovInv(Double_t c, Double_t d);
203967fc	101	Float_t GetdX() const { return fdX;}
203967fc	102	Float_t* GetdEdx() { return &fdEdx[0];}
0b433f72	103	Float_t GetdQdl(Int_t ic, Float_t *dx=0x0) const;
3e778975	104	Float_t GetdYdX() const { return fYfit[1]; }
	105	Float_t GetdZdX() const { return fZref[1]; }
	106	Int_t GetdY() const { return Int_t(GetY()/0.014);}
203967fc	107	Int_t GetDetector() const { return fDet;}
e3cf3d02	108	void GetCalibParam(Float_t &exb, Float_t &vd, Float_t &t0, Float_t &s2, Float_t &dl, Float_t &dt) const {
e3cf3d02	109	exb = fExB; vd = fVD; t0 = fT0; s2 = fS2PRF; dl = fDiffL; dt = fDiffT;}
8d2bec9e	110	AliTRDcluster* GetClusters(Int_t i) const { return i<0 \|\| i>=kNclusters ? 0x0 : fClusters[i];}
f301a656	111	static TLinearFitter* GetFitterY();
f301a656	112	static TLinearFitter* GetFitterZ();
8d2bec9e	113	Int_t GetIndexes(Int_t i) const{ return i<0 \|\| i>=kNclusters ? -1 : fIndexes[i];}
e3cf3d02	114	Int_t GetLabels(Int_t i) const { return fLabels[i];}
0b433f72	115	Float_t GetMomentum(Float_t *err = 0x0) const;
3e778975	116	Int_t GetN() const { return (Int_t)fN&0x1f;}
	117	Int_t GetN2() const { return GetN();}
	118	Int_t GetNUsed() const { return Int_t((fN>>5)&0x1f);}
	119	Int_t GetNShared() const { return Int_t((fN>>10)&0x1f);}
e44586fb	120	Float_t GetQuality(Bool_t kZcorr) const;
dd8059a8	121	Float_t GetPadLength() const { return fPad[0];}
dd8059a8	122	Float_t GetPadWidth() const { return fPad[1];}
ae4e8b84	123	Int_t GetPlane() const { return AliTRDgeometry::GetLayer(fDet); }
ae4e8b84	124
3e778975	125	Float_t* GetProbability(Bool_t force=kFALSE);
b25a5e9e	126	Float_t GetPt() const { return fPt; }
3e778975	127	inline Double_t GetPID(Int_t is=-1) const;
e3cf3d02	128	Float_t GetS2Y() const { return fS2Y;}
	129	Float_t GetS2Z() const { return fS2Z;}
	130	Float_t GetSigmaY() const { return fS2Y > 0. ? TMath::Sqrt(fS2Y) : 0.2;}
	131	Float_t GetSnp() const { return fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
1fd9389f	132	Float_t GetTgl() const { return fZref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
dd8059a8	133	Float_t GetTilt() const { return fPad[2];}
3e778975	134	UInt_t GetTrackletWord() const { return 0;}
b72f4eaf	135	UShort_t GetVolumeId() const;
e3cf3d02	136	Float_t GetX0() const { return fX0;}
e3cf3d02	137	Float_t GetX() const { return fX0 - fX;}
5a7a515d	138	Float_t GetY() const { return fYfit[0] - fYfit[1] * fX;}
b1957d3c	139	Double_t GetYat(Double_t x) const { return fYfit[0] - fYfit[1] * (fX0-x);}
1fd9389f	140	Float_t GetYfit(Int_t id) const { return fYfit[id];}
	141	Float_t GetYref(Int_t id) const { return fYref[id];}
	142	Float_t GetZ() const { return fZfit[0] - fZfit[1] * fX;}
b1957d3c	143	Double_t GetZat(Double_t x) const { return fZfit[0] - fZfit[1] * (fX0-x);}
1fd9389f	144	Float_t GetZfit(Int_t id) const { return fZfit[id];}
	145	Float_t GetZref(Int_t id) const { return fZref[id];}
	146	Int_t GetYbin() const { return Int_t(GetY()/0.016);}
	147	Int_t GetZbin() const { return Int_t(GetZ()/fPad[0]);}
e3cf3d02	148
ae4e8b84	149	inline AliTRDcluster* NextCluster();
71ea19a3	150	inline AliTRDcluster* PrevCluster();
e44586fb	151	void Print(Option_t *o = "") const;
71ea19a3	152	inline void ResetClusterIter(Bool_t forward = kTRUE);
e3cf3d02	153	void Reset();
ae4e8b84	154
1fd9389f	155	void SetC(Float_t c) { fC = c;}
1fd9389f	156	void SetChi2(Float_t chi2) { fChi2 = chi2;}
16cca13f	157	inline void SetCovRef(const Double_t *cov);
e3cf3d02	158	void SetIndexes(Int_t i, Int_t idx) { fIndexes[i] = idx; }
e3cf3d02	159	void SetLabels(Int_t lbls) { memcpy(fLabels, lbls, 3sizeof(Int_t)); }
e20bef2b	160	void SetKink(Bool_t k = kTRUE){ SetBit(kKink, k);}
e20bef2b	161	void SetPID(Bool_t k = kTRUE) { SetBit(kPID, k);}
f29f13a6	162	void SetStandAlone(Bool_t st) { SetBit(kStandAlone, st); }
b25a5e9e	163	void SetPt(Double_t pt) { fPt = pt;}
29b87567	164	void SetOwner();
eb2b4f91	165	void SetPadPlane(AliTRDpadPlane *p);
dd8059a8	166	void SetPadLength(Float_t l) { fPad[0] = l;}
dd8059a8	167	void SetPadWidth(Float_t w) { fPad[1] = w;}
cbe97468	168	void SetTilt(Float_t tilt) { fPad[2] = tilt; }
203967fc	169	void SetDetector(Int_t d) { fDet = d; }
bee2b41e	170	void SetDX(Float_t inDX) { fdX = inDX;}
3a039a31	171	void SetReconstructor(const AliTRDReconstructor *rec) {fReconstructor = rec;}
e3cf3d02	172	void SetX0(Float_t x0) { fX0 = x0; }
	173	void SetYref(Int_t i, Float_t y) { fYref[i] = y;}
	174	void SetZref(Int_t i, Float_t z) { fZref[i] = z;}
f29f13a6	175	// void SetUsabilityMap(Long_t um) { fUsable = um; }
16cca13f	176	void Update(const AliTRDtrackV1* trk);
e3cf3d02	177	void UpdateUsed();
e3cf3d02	178	void UseClusters();
e4f2f73d	179
d937ad7a	180	protected:
3e778975	181	void Copy(TObject &ref) const;
e4f2f73d	182
e44586fb	183	private:
3e778975	184	inline void SetN(Int_t n);
	185	inline void SetNUsed(Int_t n);
	186	inline void SetNShared(Int_t n);
	187
0ae89c5d	188	const AliTRDReconstructor *fReconstructor;//! local reconstructor
e3cf3d02	189	AliTRDcluster **fClusterIter; //! clusters iterator
8d2bec9e	190	Int_t fIndexes[kNclusters]; //! Indexes
e3cf3d02	191	Float_t fExB; //! tg(a_L) @ tracklet location
	192	Float_t fVD; //! drift velocity @ tracklet location
	193	Float_t fT0; //! time 0 @ tracklet location
	194	Float_t fS2PRF; //! sigma^2 PRF for xd->0 and phi=a_L
	195	Float_t fDiffL; //! longitudinal diffusion coefficient
	196	Float_t fDiffT; //! transversal diffusion coefficient
71ea19a3	197	Char_t fClusterIdx; //! clusters iterator
dd8059a8	198	UShort_t fN; // number of clusters attached/used/shared
e3cf3d02	199	Short_t fDet; // TRD detector
8d2bec9e	200	AliTRDcluster *fClusters[kNclusters]; // Clusters
dd8059a8	201	Float_t fPad[3]; // local pad definition : length/width/tilt
1fd9389f	202	Float_t fYref[2]; // Reference y, dydx
	203	Float_t fZref[2]; // Reference z, dz/dx
	204	Float_t fYfit[2]; // Fit y, dy/dx
	205	Float_t fZfit[2]; // Fit z
16cca13f	206	Float_t fPt; // Pt estimate @ tracklet [GeV/c]
e44586fb	207	Float_t fdX; // length of time bin
e3cf3d02	208	Float_t fX0; // anode wire position
	209	Float_t fX; // radial position of the tracklet
	210	Float_t fY; // r-phi position of the tracklet
	211	Float_t fZ; // z position of the tracklet
	212	Float_t fS2Y; // estimated resolution in the r-phi direction
	213	Float_t fS2Z; // estimated resolution in the z direction
	214	Float_t fC; // Curvature
	215	Float_t fChi2; // Global chi2
8d2bec9e	216	Float_t fdEdx[kNslices]; // dE/dx measurements for tracklet
1fd9389f	217	Float_t fProb[AliPID::kSPECIES]; // PID probabilities
e3cf3d02	218	Int_t fLabels[3]; // most frequent MC labels and total number of different labels
16cca13f	219	Double_t fRefCov[7]; // covariance matrix of the track in the yz plane + the rest of the diagonal elements
d937ad7a	220	Double_t fCov[3]; // covariance matrix of the tracklet in the xy plane
f301a656	221	static TLinearFitter *fgFitterY;
f301a656	222	static TLinearFitter *fgFitterZ;
e4f2f73d	223
16cca13f	224	ClassDef(AliTRDseedV1, 7) // The offline TRD tracklet
e4f2f73d	225	};
	226
	227	//____________________________________________________________
e3cf3d02	228	inline Float_t AliTRDseedV1::GetChi2Z() const
e4f2f73d	229	{
e3cf3d02	230	Double_t dz = fZref[0]-fZfit[0]; dz*=dz;
	231	Double_t cov[3]; GetCovAt(fX, cov);
	232	Double_t s2 = fRefCov[2]+cov[2];
	233	return s2 > 0. ? dz/s2 : 0.;
e4f2f73d	234	}
	235
	236	//____________________________________________________________
e3cf3d02	237	inline Float_t AliTRDseedV1::GetChi2Y() const
e4f2f73d	238	{
e3cf3d02	239	Double_t dy = fYref[0]-fYfit[0]; dy*=dy;
	240	Double_t cov[3]; GetCovAt(fX, cov);
	241	Double_t s2 = fRefCov[0]+cov[0];
	242	return s2 > 0. ? dy/s2 : 0.;
e4f2f73d	243	}
e4f2f73d	244
f29f13a6	245	//____________________________________________________________
	246	inline Float_t AliTRDseedV1::GetChi2Phi() const
	247	{
	248	Double_t dphi = fYref[1]-fYfit[1]; dphi*=dphi;
	249	Double_t cov[3]; GetCovAt(fX, cov);
	250	Double_t s2 = fRefCov[2]+cov[2];
	251	return s2 > 0. ? dphi/s2 : 0.;
	252	}
	253
16cca13f	254
16cca13f	255
3e778975	256	//____________________________________________________________
	257	inline Double_t AliTRDseedV1::GetPID(Int_t is) const
	258	{
	259	if(is<0) return fProb[AliPID::kElectron];
	260	if(is<AliPID::kSPECIES) return fProb[is];
	261	return 0.;
	262	}
	263
e4f2f73d	264	//____________________________________________________________
0906e73e	265	inline void AliTRDseedV1::Init(const AliRieman *rieman)
e4f2f73d	266	{
e44586fb	267	fZref[0] = rieman->GetZat(fX0);
	268	fZref[1] = rieman->GetDZat(fX0);
	269	fYref[0] = rieman->GetYat(fX0);
	270	fYref[1] = rieman->GetDYat(fX0);
d07eec70	271	if(fReconstructor && fReconstructor->IsHLT()){
	272	fRefCov[0] = 1;
	273	fRefCov[2] = 10;
	274	}else{
	275	fRefCov[0] = rieman->GetErrY(fX0);
	276	fRefCov[2] = rieman->GetErrZ(fX0);
	277	}
55ef6967	278	fC = rieman->GetC();
55ef6967	279	fChi2 = rieman->GetChi2();
e4f2f73d	280	}
e4f2f73d	281
ae4e8b84	282	//____________________________________________________________
	283	inline AliTRDcluster* AliTRDseedV1::NextCluster()
	284	{
71ea19a3	285	// Mimic the usage of STL iterators.
	286	// Forward iterator
	287
ae4e8b84	288	fClusterIdx++; fClusterIter++;
8d2bec9e	289	while(fClusterIdx < kNclusters){
71ea19a3	290	if(!(*fClusterIter)){
	291	fClusterIdx++;
	292	fClusterIter++;
	293	continue;
	294	}
	295	return *fClusterIter;
	296	}
	297	return 0x0;
	298	}
	299
	300	//____________________________________________________________
	301	inline AliTRDcluster* AliTRDseedV1::PrevCluster()
	302	{
	303	// Mimic the usage of STL iterators.
	304	// Backward iterator
	305
	306	fClusterIdx--; fClusterIter--;
	307	while(fClusterIdx >= 0){
	308	if(!(*fClusterIter)){
	309	fClusterIdx--;
	310	fClusterIter--;
	311	continue;
	312	}
	313	return *fClusterIter;
	314	}
	315	return 0x0;
	316	}
	317
	318	//____________________________________________________________
	319	inline void AliTRDseedV1::ResetClusterIter(Bool_t forward)
	320	{
	321	// Mimic the usage of STL iterators.
	322	// Facilitate the usage of NextCluster for forward like
	323	// iterator (kTRUE) and PrevCluster for backward like iterator (kFALSE)
	324
	325	if(forward){
	326	fClusterIter = &fClusters[0]; fClusterIter--;
	327	fClusterIdx=-1;
	328	} else {
8d2bec9e	329	fClusterIter = &fClusters[kNclusters-1]; fClusterIter++;
8d2bec9e	330	fClusterIdx=kNclusters;
71ea19a3	331	}
ae4e8b84	332	}
ae4e8b84	333
16cca13f	334	//____________________________________________________________
	335	inline void AliTRDseedV1::SetCovRef(const Double_t *cov)
	336	{
	337	// Copy some "important" covariance matrix elements
	338	// var(y)
	339	// cov(y,z) var(z)
	340	// var(snp)
	341	// var(tgl)
	342	// cov(tgl, 1/pt) var(1/pt)
	343
	344	memcpy(&fRefCov[0], cov, 3*sizeof(Double_t)); // yz full covariance
	345	fRefCov[3] = cov[ 5]; // snp variance
	346	fRefCov[4] = cov[ 9]; // tgl variance
	347	fRefCov[5] = cov[13]; // cov(tgl, 1/pt)
	348	fRefCov[6] = cov[14]; // 1/pt variance
	349	}
	350
	351
3e778975	352	//____________________________________________________________
	353	inline void AliTRDseedV1::SetN(Int_t n)
	354	{
	355	if(n<0 \|\| n>= (1<<5)) return;
	356	fN &= ~0x1f;
	357	fN \|= n;
	358	}
	359
	360	//____________________________________________________________
	361	inline void AliTRDseedV1::SetNUsed(Int_t n)
	362	{
	363	if(n<0 \|\| n>= (1<<5)) return;
	364	fN &= ~(0x1f<<5);
	365	n <<= 5; fN \|= n;
	366	}
	367
	368	//____________________________________________________________
	369	inline void AliTRDseedV1::SetNShared(Int_t n)
	370	{
	371	if(n<0 \|\| n>= (1<<5)) return;
	372	fN &= ~(0x1f<<10);
	373	n <<= 10; fN \|= n;
	374	}
	375
	376
e4f2f73d	377	#endif
e4f2f73d	378
47d5d320	379
6e49cfdb	380