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 AliTRDseedV1 : public AliTRDseed
42 AliTRDseedV1(Int_t plane = -1);
44 AliTRDseedV1(const AliTRDseedV1 &ref);
45 AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
47 Bool_t AttachClustersIter(AliTRDtrackingChamber *chamber, Float_t quality, Bool_t kZcorr = kFALSE
48 , AliTRDcluster *c=0x0);
49 Bool_t AttachClusters(AliTRDtrackingChamber *chamber, Bool_t kZcorr = kFALSE);
50 void CookdEdx(Int_t nslices);
51 void Draw(Option_t* o = "");
54 void Init(AliTRDtrack *track);
55 inline void Init(const AliRieman *fit);
56 Bool_t IsOwner() const { return TestBit(1);}
57 Bool_t IsRowCross() const { return TestBit(2);}
59 inline Float_t GetChi2Z(const Float_t z = 999.) const;
60 inline Float_t GetChi2Y(const Float_t y = 999.) const;
61 void GetCovAt(Double_t x, Double_t *cov) const;
62 Double_t* GetCrossXYZ() { return &fCross[0];}
63 Double_t GetCrossSz2() const { return fCross[3];}
64 Float_t* GetdEdx() {return &fdEdx[0];}
65 Float_t GetdQdl(Int_t ic) const;
66 Double_t GetMomentum() const {return fMom;}
67 Int_t GetN() const {return fN2;}
68 Float_t GetQuality(Bool_t kZcorr) const;
69 Int_t GetPlane() const { return fPlane; }
70 Double_t* GetProbability();
71 Double_t GetSnp() const { return fSnp;}
72 Double_t GetTgl() const { return fTgl;}
73 Double_t GetYat(Double_t x) const { return fYfitR[0] + fYfitR[1] * (x - fX0);}
74 Double_t GetZat(Double_t x) const { return fZfitR[0] + fZfitR[1] * (x - fX0);}
76 void Print(Option_t *o = "") const;
78 void SetMomentum(Double_t mom) {fMom = mom;}
79 void SetOwner(Bool_t own = kTRUE);
80 void SetPlane(Int_t p) { fPlane = p; }
81 void SetSnp(Double_t snp) {fSnp = snp;}
82 void SetTgl(Double_t tgl) {fTgl = tgl;}
86 void Copy(TObject &ref) const;
90 Int_t fPlane; // TRD plane
91 Float_t fMom; // Momentum estimate for tracklet [GeV/c]
92 Float_t fSnp; // sin of track with respect to x direction in XY plane
93 Float_t fTgl; // tg of track with respect to x direction in XZ plane
94 Float_t fdX; // length of time bin
95 Float_t fdEdx[knSlices]; // dE/dx measurements for tracklet
96 Double_t fCross[4]; // spatial parameters of the pad row crossing
97 Double_t fProb[AliPID::kSPECIES]; // PID probabilities
99 ClassDef(AliTRDseedV1, 1) // New TRD seed
103 //____________________________________________________________
104 inline Float_t AliTRDseedV1::GetChi2Z(const Float_t z) const
106 Float_t z1 = (z == 999.) ? fMeanz : z;
107 Float_t chi = fZref[0] - z1;
111 //____________________________________________________________
112 inline Float_t AliTRDseedV1::GetChi2Y(const Float_t y) const
114 Float_t y1 = (y == 999.) ? fYfitR[0] : y;
115 Float_t chi = fYref[0] - y1;
119 //____________________________________________________________
120 inline void AliTRDseedV1::Init(const AliRieman *rieman)
122 fZref[0] = rieman->GetZat(fX0);
123 fZref[1] = rieman->GetDZat(fX0);
124 fYref[0] = rieman->GetYat(fX0);
125 fYref[1] = rieman->GetDYat(fX0);