[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
{
  friend class AliHLTTRDTracklet;

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 *const 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(const Double_t * const c, Double_t *d);
  static Double_t GetCovInv(const Double_t * const c, Double_t *d);
  Float_t   GetdX() const            { return fdX;}
  const Float_t*  GetdEdx() const    { return &fdEdx[0];}
  Float_t   GetdQdl(Int_t ic, Float_t *dx=NULL) 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 ? NULL: 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 = NULL) 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) {fkReconstructor = 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 *fkReconstructor;//! 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;        // Linear Fitter for tracklet fit in xy-plane
  static TLinearFitter   *fgFitterZ;        // Linear Fitter for tracklet fit in xz-plane

  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(fkReconstructor && fkReconstructor->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 NULL;
}

//____________________________________________________________
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 NULL;
}

//____________________________________________________________
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	{
3044dfe5	50	friend class AliHLTTRDTracklet;
3044dfe5	51
e3cf3d02	52	public:
e3cf3d02	53	enum ETRDtrackletBuffers {
8d2bec9e	54	kNtb = 31 // max clusters/pad row
	55	,kNclusters = 2*kNtb // max number of clusters/tracklet
	56	,kNslices = 10 // max dEdx slices
e44586fb	57	};
e3cf3d02	58
2e2915e7	59	// bits from 0-13 are reserved by ROOT (see TObject.h)
e3cf3d02	60	enum ETRDtrackletStatus {
f29f13a6	61	kOwner = BIT(14) // owner of its clusters
f29f13a6	62	,kRowCross = BIT(15) // pad row cross tracklet
e20bef2b	63	,kPID = BIT(16) // PID contributor
	64	,kCalib = BIT(17) // calibrated tracklet
	65	,kKink = BIT(18) // kink prolongation tracklet
1fd9389f	66	,kStandAlone = BIT(19) // tracklet build during stand alone track finding
e44586fb	67	};
e44586fb	68
ae4e8b84	69	AliTRDseedV1(Int_t det = -1);
e44586fb	70	~AliTRDseedV1();
	71	AliTRDseedV1(const AliTRDseedV1 &ref);
	72	AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
	73
4d6aee34	74	Bool_t AttachClusters(AliTRDtrackingChamber *const chamber, Bool_t tilt = kFALSE);
203967fc	75	void Bootstrap(const AliTRDReconstructor *rec);
e3cf3d02	76	void Calibrate();
203967fc	77	void CookdEdx(Int_t nslices);
e3cf3d02	78	void CookLabels();
3e778975	79	Bool_t CookPID();
b72f4eaf	80	Bool_t Fit(Bool_t tilt=kFALSE, Bool_t zcorr=kFALSE);
203967fc	81	Bool_t Init(AliTRDtrackV1 *track);
e44586fb	82	inline void Init(const AliRieman *fit);
203967fc	83	Bool_t IsEqual(const TObject *inTracklet) const;
e3cf3d02	84	Bool_t IsCalibrated() const { return TestBit(kCalib);}
e44586fb	85	Bool_t IsOwner() const { return TestBit(kOwner);}
f29f13a6	86	Bool_t IsKink() const { return TestBit(kKink);}
e20bef2b	87	Bool_t HasPID() const { return TestBit(kPID);}
3e778975	88	Bool_t IsOK() const { return GetN() > 4 && GetNUsed() < 4;}
e44586fb	89	Bool_t IsRowCross() const { return TestBit(kRowCross);}
f29f13a6	90	Bool_t IsUsable(Int_t i) const { return fClusters[i] && !fClusters[i]->IsUsed();}
f29f13a6	91	Bool_t IsStandAlone() const { return TestBit(kStandAlone);}
e44586fb	92
e3cf3d02	93	Float_t GetC() const { return fC; }
	94	Float_t GetChi2() const { return fChi2; }
	95	inline Float_t GetChi2Z() const;
	96	inline Float_t GetChi2Y() const;
f29f13a6	97	inline Float_t GetChi2Phi() const;
e44586fb	98	void GetCovAt(Double_t x, Double_t *cov) const;
d937ad7a	99	void GetCovXY(Double_t cov) const { memcpy(cov, &fCov[0], 3sizeof(Double_t));}
16cca13f	100	void GetCovRef(Double_t cov) const { memcpy(cov, &fRefCov, 7sizeof(Double_t));}
4d6aee34	101	static Double_t GetCovSqrt(const Double_t * const c, Double_t *d);
4d6aee34	102	static Double_t GetCovInv(const Double_t * const c, Double_t *d);
203967fc	103	Float_t GetdX() const { return fdX;}
4d6aee34	104	const Float_t* GetdEdx() const { return &fdEdx[0];}
4d6aee34	105	Float_t GetdQdl(Int_t ic, Float_t *dx=NULL) const;
3e778975	106	Float_t GetdYdX() const { return fYfit[1]; }
	107	Float_t GetdZdX() const { return fZref[1]; }
	108	Int_t GetdY() const { return Int_t(GetY()/0.014);}
203967fc	109	Int_t GetDetector() const { return fDet;}
e3cf3d02	110	void GetCalibParam(Float_t &exb, Float_t &vd, Float_t &t0, Float_t &s2, Float_t &dl, Float_t &dt) const {
e3cf3d02	111	exb = fExB; vd = fVD; t0 = fT0; s2 = fS2PRF; dl = fDiffL; dt = fDiffT;}
4d6aee34	112	AliTRDcluster* GetClusters(Int_t i) const { return i<0 \|\| i>=kNclusters ? NULL: fClusters[i];}
f301a656	113	static TLinearFitter* GetFitterY();
f301a656	114	static TLinearFitter* GetFitterZ();
8d2bec9e	115	Int_t GetIndexes(Int_t i) const{ return i<0 \|\| i>=kNclusters ? -1 : fIndexes[i];}
e3cf3d02	116	Int_t GetLabels(Int_t i) const { return fLabels[i];}
4d6aee34	117	Float_t GetMomentum(Float_t *err = NULL) const;
3e778975	118	Int_t GetN() const { return (Int_t)fN&0x1f;}
	119	Int_t GetN2() const { return GetN();}
	120	Int_t GetNUsed() const { return Int_t((fN>>5)&0x1f);}
	121	Int_t GetNShared() const { return Int_t((fN>>10)&0x1f);}
e44586fb	122	Float_t GetQuality(Bool_t kZcorr) const;
dd8059a8	123	Float_t GetPadLength() const { return fPad[0];}
dd8059a8	124	Float_t GetPadWidth() const { return fPad[1];}
ae4e8b84	125	Int_t GetPlane() const { return AliTRDgeometry::GetLayer(fDet); }
ae4e8b84	126
3e778975	127	Float_t* GetProbability(Bool_t force=kFALSE);
b25a5e9e	128	Float_t GetPt() const { return fPt; }
3e778975	129	inline Double_t GetPID(Int_t is=-1) const;
e3cf3d02	130	Float_t GetS2Y() const { return fS2Y;}
	131	Float_t GetS2Z() const { return fS2Z;}
	132	Float_t GetSigmaY() const { return fS2Y > 0. ? TMath::Sqrt(fS2Y) : 0.2;}
	133	Float_t GetSnp() const { return fYref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
1fd9389f	134	Float_t GetTgl() const { return fZref[1]/TMath::Sqrt(1+fYref[1]*fYref[1]);}
dd8059a8	135	Float_t GetTilt() const { return fPad[2];}
3e778975	136	UInt_t GetTrackletWord() const { return 0;}
b72f4eaf	137	UShort_t GetVolumeId() const;
e3cf3d02	138	Float_t GetX0() const { return fX0;}
e3cf3d02	139	Float_t GetX() const { return fX0 - fX;}
5a7a515d	140	Float_t GetY() const { return fYfit[0] - fYfit[1] * fX;}
b1957d3c	141	Double_t GetYat(Double_t x) const { return fYfit[0] - fYfit[1] * (fX0-x);}
1fd9389f	142	Float_t GetYfit(Int_t id) const { return fYfit[id];}
	143	Float_t GetYref(Int_t id) const { return fYref[id];}
	144	Float_t GetZ() const { return fZfit[0] - fZfit[1] * fX;}
b1957d3c	145	Double_t GetZat(Double_t x) const { return fZfit[0] - fZfit[1] * (fX0-x);}
1fd9389f	146	Float_t GetZfit(Int_t id) const { return fZfit[id];}
	147	Float_t GetZref(Int_t id) const { return fZref[id];}
	148	Int_t GetYbin() const { return Int_t(GetY()/0.016);}
	149	Int_t GetZbin() const { return Int_t(GetZ()/fPad[0]);}
e3cf3d02	150
ae4e8b84	151	inline AliTRDcluster* NextCluster();
71ea19a3	152	inline AliTRDcluster* PrevCluster();
e44586fb	153	void Print(Option_t *o = "") const;
71ea19a3	154	inline void ResetClusterIter(Bool_t forward = kTRUE);
e3cf3d02	155	void Reset();
ae4e8b84	156
1fd9389f	157	void SetC(Float_t c) { fC = c;}
1fd9389f	158	void SetChi2(Float_t chi2) { fChi2 = chi2;}
16cca13f	159	inline void SetCovRef(const Double_t *cov);
e3cf3d02	160	void SetIndexes(Int_t i, Int_t idx) { fIndexes[i] = idx; }
e3cf3d02	161	void SetLabels(Int_t lbls) { memcpy(fLabels, lbls, 3sizeof(Int_t)); }
e20bef2b	162	void SetKink(Bool_t k = kTRUE){ SetBit(kKink, k);}
e20bef2b	163	void SetPID(Bool_t k = kTRUE) { SetBit(kPID, k);}
f29f13a6	164	void SetStandAlone(Bool_t st) { SetBit(kStandAlone, st); }
b25a5e9e	165	void SetPt(Double_t pt) { fPt = pt;}
29b87567	166	void SetOwner();
eb2b4f91	167	void SetPadPlane(AliTRDpadPlane *p);
dd8059a8	168	void SetPadLength(Float_t l) { fPad[0] = l;}
dd8059a8	169	void SetPadWidth(Float_t w) { fPad[1] = w;}
cbe97468	170	void SetTilt(Float_t tilt) { fPad[2] = tilt; }
203967fc	171	void SetDetector(Int_t d) { fDet = d; }
bee2b41e	172	void SetDX(Float_t inDX) { fdX = inDX;}
4d6aee34	173	void SetReconstructor(const AliTRDReconstructor *rec) {fkReconstructor = rec;}
e3cf3d02	174	void SetX0(Float_t x0) { fX0 = x0; }
	175	void SetYref(Int_t i, Float_t y) { fYref[i] = y;}
	176	void SetZref(Int_t i, Float_t z) { fZref[i] = z;}
f29f13a6	177	// void SetUsabilityMap(Long_t um) { fUsable = um; }
16cca13f	178	void Update(const AliTRDtrackV1* trk);
e3cf3d02	179	void UpdateUsed();
e3cf3d02	180	void UseClusters();
e4f2f73d	181
d937ad7a	182	protected:
3e778975	183	void Copy(TObject &ref) const;
e4f2f73d	184
e44586fb	185	private:
3e778975	186	inline void SetN(Int_t n);
	187	inline void SetNUsed(Int_t n);
	188	inline void SetNShared(Int_t n);
	189
4d6aee34	190	const AliTRDReconstructor *fkReconstructor;//! local reconstructor
e3cf3d02	191	AliTRDcluster **fClusterIter; //! clusters iterator
8d2bec9e	192	Int_t fIndexes[kNclusters]; //! Indexes
e3cf3d02	193	Float_t fExB; //! tg(a_L) @ tracklet location
	194	Float_t fVD; //! drift velocity @ tracklet location
	195	Float_t fT0; //! time 0 @ tracklet location
	196	Float_t fS2PRF; //! sigma^2 PRF for xd->0 and phi=a_L
	197	Float_t fDiffL; //! longitudinal diffusion coefficient
	198	Float_t fDiffT; //! transversal diffusion coefficient
71ea19a3	199	Char_t fClusterIdx; //! clusters iterator
dd8059a8	200	UShort_t fN; // number of clusters attached/used/shared
e3cf3d02	201	Short_t fDet; // TRD detector
8d2bec9e	202	AliTRDcluster *fClusters[kNclusters]; // Clusters
dd8059a8	203	Float_t fPad[3]; // local pad definition : length/width/tilt
1fd9389f	204	Float_t fYref[2]; // Reference y, dydx
	205	Float_t fZref[2]; // Reference z, dz/dx
	206	Float_t fYfit[2]; // Fit y, dy/dx
	207	Float_t fZfit[2]; // Fit z
16cca13f	208	Float_t fPt; // Pt estimate @ tracklet [GeV/c]
e44586fb	209	Float_t fdX; // length of time bin
e3cf3d02	210	Float_t fX0; // anode wire position
	211	Float_t fX; // radial position of the tracklet
	212	Float_t fY; // r-phi position of the tracklet
	213	Float_t fZ; // z position of the tracklet
	214	Float_t fS2Y; // estimated resolution in the r-phi direction
	215	Float_t fS2Z; // estimated resolution in the z direction
	216	Float_t fC; // Curvature
	217	Float_t fChi2; // Global chi2
8d2bec9e	218	Float_t fdEdx[kNslices]; // dE/dx measurements for tracklet
1fd9389f	219	Float_t fProb[AliPID::kSPECIES]; // PID probabilities
e3cf3d02	220	Int_t fLabels[3]; // most frequent MC labels and total number of different labels
16cca13f	221	Double_t fRefCov[7]; // covariance matrix of the track in the yz plane + the rest of the diagonal elements
d937ad7a	222	Double_t fCov[3]; // covariance matrix of the tracklet in the xy plane
4d6aee34	223	static TLinearFitter *fgFitterY; // Linear Fitter for tracklet fit in xy-plane
4d6aee34	224	static TLinearFitter *fgFitterZ; // Linear Fitter for tracklet fit in xz-plane
e4f2f73d	225
16cca13f	226	ClassDef(AliTRDseedV1, 7) // The offline TRD tracklet
e4f2f73d	227	};
	228
	229	//____________________________________________________________
e3cf3d02	230	inline Float_t AliTRDseedV1::GetChi2Z() const
e4f2f73d	231	{
e3cf3d02	232	Double_t dz = fZref[0]-fZfit[0]; dz*=dz;
	233	Double_t cov[3]; GetCovAt(fX, cov);
	234	Double_t s2 = fRefCov[2]+cov[2];
	235	return s2 > 0. ? dz/s2 : 0.;
e4f2f73d	236	}
	237
	238	//____________________________________________________________
e3cf3d02	239	inline Float_t AliTRDseedV1::GetChi2Y() const
e4f2f73d	240	{
e3cf3d02	241	Double_t dy = fYref[0]-fYfit[0]; dy*=dy;
	242	Double_t cov[3]; GetCovAt(fX, cov);
	243	Double_t s2 = fRefCov[0]+cov[0];
	244	return s2 > 0. ? dy/s2 : 0.;
e4f2f73d	245	}
e4f2f73d	246
f29f13a6	247	//____________________________________________________________
	248	inline Float_t AliTRDseedV1::GetChi2Phi() const
	249	{
	250	Double_t dphi = fYref[1]-fYfit[1]; dphi*=dphi;
	251	Double_t cov[3]; GetCovAt(fX, cov);
	252	Double_t s2 = fRefCov[2]+cov[2];
	253	return s2 > 0. ? dphi/s2 : 0.;
	254	}
	255
16cca13f	256
16cca13f	257
3e778975	258	//____________________________________________________________
	259	inline Double_t AliTRDseedV1::GetPID(Int_t is) const
	260	{
	261	if(is<0) return fProb[AliPID::kElectron];
	262	if(is<AliPID::kSPECIES) return fProb[is];
	263	return 0.;
	264	}
	265
e4f2f73d	266	//____________________________________________________________
0906e73e	267	inline void AliTRDseedV1::Init(const AliRieman *rieman)
e4f2f73d	268	{
e44586fb	269	fZref[0] = rieman->GetZat(fX0);
	270	fZref[1] = rieman->GetDZat(fX0);
	271	fYref[0] = rieman->GetYat(fX0);
	272	fYref[1] = rieman->GetDYat(fX0);
4d6aee34	273	if(fkReconstructor && fkReconstructor->IsHLT()){
d07eec70	274	fRefCov[0] = 1;
	275	fRefCov[2] = 10;
	276	}else{
	277	fRefCov[0] = rieman->GetErrY(fX0);
	278	fRefCov[2] = rieman->GetErrZ(fX0);
	279	}
55ef6967	280	fC = rieman->GetC();
55ef6967	281	fChi2 = rieman->GetChi2();
e4f2f73d	282	}
e4f2f73d	283
ae4e8b84	284	//____________________________________________________________
	285	inline AliTRDcluster* AliTRDseedV1::NextCluster()
	286	{
71ea19a3	287	// Mimic the usage of STL iterators.
	288	// Forward iterator
	289
ae4e8b84	290	fClusterIdx++; fClusterIter++;
8d2bec9e	291	while(fClusterIdx < kNclusters){
71ea19a3	292	if(!(*fClusterIter)){
	293	fClusterIdx++;
	294	fClusterIter++;
	295	continue;
	296	}
	297	return *fClusterIter;
	298	}
4d6aee34	299	return NULL;
71ea19a3	300	}
	301
	302	//____________________________________________________________
	303	inline AliTRDcluster* AliTRDseedV1::PrevCluster()
	304	{
	305	// Mimic the usage of STL iterators.
	306	// Backward iterator
	307
	308	fClusterIdx--; fClusterIter--;
	309	while(fClusterIdx >= 0){
	310	if(!(*fClusterIter)){
	311	fClusterIdx--;
	312	fClusterIter--;
	313	continue;
	314	}
	315	return *fClusterIter;
	316	}
4d6aee34	317	return NULL;
71ea19a3	318	}
	319
	320	//____________________________________________________________
	321	inline void AliTRDseedV1::ResetClusterIter(Bool_t forward)
	322	{
	323	// Mimic the usage of STL iterators.
	324	// Facilitate the usage of NextCluster for forward like
	325	// iterator (kTRUE) and PrevCluster for backward like iterator (kFALSE)
	326
	327	if(forward){
	328	fClusterIter = &fClusters[0]; fClusterIter--;
	329	fClusterIdx=-1;
	330	} else {
8d2bec9e	331	fClusterIter = &fClusters[kNclusters-1]; fClusterIter++;
8d2bec9e	332	fClusterIdx=kNclusters;
71ea19a3	333	}
ae4e8b84	334	}
ae4e8b84	335
16cca13f	336	//____________________________________________________________
	337	inline void AliTRDseedV1::SetCovRef(const Double_t *cov)
	338	{
	339	// Copy some "important" covariance matrix elements
	340	// var(y)
	341	// cov(y,z) var(z)
	342	// var(snp)
	343	// var(tgl)
	344	// cov(tgl, 1/pt) var(1/pt)
	345
	346	memcpy(&fRefCov[0], cov, 3*sizeof(Double_t)); // yz full covariance
	347	fRefCov[3] = cov[ 5]; // snp variance
	348	fRefCov[4] = cov[ 9]; // tgl variance
	349	fRefCov[5] = cov[13]; // cov(tgl, 1/pt)
	350	fRefCov[6] = cov[14]; // 1/pt variance
	351	}
	352
	353
3e778975	354	//____________________________________________________________
	355	inline void AliTRDseedV1::SetN(Int_t n)
	356	{
	357	if(n<0 \|\| n>= (1<<5)) return;
	358	fN &= ~0x1f;
	359	fN \|= n;
	360	}
	361
	362	//____________________________________________________________
	363	inline void AliTRDseedV1::SetNUsed(Int_t n)
	364	{
	365	if(n<0 \|\| n>= (1<<5)) return;
	366	fN &= ~(0x1f<<5);
	367	n <<= 5; fN \|= n;
	368	}
	369
	370	//____________________________________________________________
	371	inline void AliTRDseedV1::SetNShared(Int_t n)
	372	{
	373	if(n<0 \|\| n>= (1<<5)) return;
	374	fN &= ~(0x1f<<10);
	375	n <<= 10; fN \|= n;
	376	}
	377
	378
e4f2f73d	379	#endif
e4f2f73d	380
47d5d320	381
6e49cfdb	382