3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 ////////////////////////////////////////////////////////////////////////////
10 // The TRD track seed //
12 ////////////////////////////////////////////////////////////////////////////
15 #include "AliTRDseed.h"
23 #include "AliRieman.h"
26 class TTreeSRedirector;
30 class AliTRDtrackingChamber;
33 class AliTRDReconstructor;
34 class AliTRDseedV1 : public AliTRDseed
43 AliTRDseedV1(Int_t plane = -1);
45 AliTRDseedV1(const AliTRDseedV1 &ref);
46 AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
48 Bool_t AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t quality, Bool_t kZcorr = kFALSE
49 , AliTRDcluster *c=0x0);
50 Bool_t AttachClusters(AliTRDtrackingChamber *chamber, Bool_t kZcorr = kFALSE);
51 void CookdEdx(Int_t nslices);
52 void Draw(Option_t* o = "");
55 Bool_t Init(AliTRDtrackV1 *track);
56 inline void Init(const AliRieman *fit);
57 Bool_t IsOwner() const { return TestBit(1);}
58 Bool_t IsRowCross() const { return TestBit(2);}
60 inline Float_t GetChi2Z(const Float_t z = 999.) const;
61 inline Float_t GetChi2Y(const Float_t y = 999.) const;
62 void GetCovAt(Double_t x, Double_t *cov) const;
63 Double_t* GetCrossXYZ() { return &fCross[0];}
64 Double_t GetCrossSz2() const { return fCross[3];}
65 Float_t* GetdEdx() {return &fdEdx[0];}
66 Float_t GetdQdl(Int_t ic) const;
67 Double_t GetMomentum() const {return fMom;}
68 Int_t GetN() const {return fN2;}
69 Float_t GetQuality(Bool_t kZcorr) const;
70 Int_t GetPlane() const { return fPlane; }
71 Double_t* GetProbability();
72 Double_t GetSnp() const { return fSnp;}
73 Double_t GetTgl() const { return fTgl;}
74 Double_t GetYat(Double_t x) const { return fYfitR[0] + fYfitR[1] * (x - fX0);}
75 Double_t GetZat(Double_t x) const { return fZfitR[0] + fZfitR[1] * (x - fX0);}
77 void Print(Option_t *o = "") const;
79 void SetMomentum(Double_t mom) {fMom = mom;}
80 void SetOwner(Bool_t own = kTRUE);
81 void SetPlane(Int_t p) { fPlane = p; }
82 void SetSnp(Double_t snp) {fSnp = snp;}
83 void SetTgl(Double_t tgl) {fTgl = tgl;}
84 void SetReconstructor(const AliTRDReconstructor *rec) {fReconstructor = rec;}
87 void Copy(TObject &ref) const;
90 const AliTRDReconstructor *fReconstructor;
91 Int_t fPlane; // TRD plane
92 Float_t fMom; // Momentum estimate for tracklet [GeV/c]
93 Float_t fSnp; // sin of track with respect to x direction in XY plane
94 Float_t fTgl; // tg of track with respect to x direction in XZ plane
95 Float_t fdX; // length of time bin
96 Float_t fdEdx[knSlices]; // dE/dx measurements for tracklet
97 Double_t fCross[4]; // spatial parameters of the pad row crossing
98 Double_t fProb[AliPID::kSPECIES]; // PID probabilities
100 ClassDef(AliTRDseedV1, 1) // New TRD seed
104 //____________________________________________________________
105 inline Float_t AliTRDseedV1::GetChi2Z(const Float_t z) const
107 Float_t z1 = (z == 999.) ? fMeanz : z;
108 Float_t chi = fZref[0] - z1;
112 //____________________________________________________________
113 inline Float_t AliTRDseedV1::GetChi2Y(const Float_t y) const
115 Float_t y1 = (y == 999.) ? fYfitR[0] : y;
116 Float_t chi = fYref[0] - y1;
120 //____________________________________________________________
121 inline void AliTRDseedV1::Init(const AliRieman *rieman)
123 fZref[0] = rieman->GetZat(fX0);
124 fZref[1] = rieman->GetDZat(fX0);
125 fYref[0] = rieman->GetYat(fX0);
126 fYref[1] = rieman->GetDYat(fX0);