TRD/AliTRDseedV1.h

   1 #ifndef ALITRDSEEDV1_H
   2 #define ALITRDSEEDV1_H
   3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   4  * See cxx source for full Copyright notice                               */
   5
   6 /* $Id$ */
   7
   8 ////////////////////////////////////////////////////////////////////////////
   9 //                                                                        //
  10 //  The TRD track seed                                                    //
  11 //                                                                        //
  12 ////////////////////////////////////////////////////////////////////////////
  13
  14 #ifndef ALITRDSEED_H
  15 #include "AliTRDseed.h"
  16 #endif
  17
  18 #ifndef ALIPID_H
  19 #include "AliPID.h"
  20 #endif
  21
  22 #ifndef ALIRIEMAN_H
  23 #include "AliRieman.h"
  24 #endif
  25
  26 class TTreeSRedirector;
  27
  28 class AliRieman;
  29
  30 class AliTRDtrackingChamber;
  31 class AliTRDcluster;
  32 class AliTRDtrack;
  33 class AliTRDseedV1 : public AliTRDseed
  34 {
  35
  36   public:
  37
  38         enum {
  39           knSlices = 10
  40         };
  41
  42         AliTRDseedV1(Int_t plane = -1);
  43         ~AliTRDseedV1();
  44         AliTRDseedV1(const AliTRDseedV1 &ref);
  45         AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
  46
  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         Bool_t  Fit();
  52
  53                void      Init(AliTRDtrack *track);
  54         inline void      Init(const AliRieman *fit);
  55
  56         inline Float_t   GetChi2Z(const Float_t z = 999.) const;
  57         inline Float_t   GetChi2Y(const Float_t y = 999.) const;
  58                void      GetCovAt(Double_t x, Double_t *cov) const;
  59                Float_t*  GetdEdx() {return &fdEdx[0];}
  60                Float_t   GetdQdl(Int_t ic) const;
  61                Double_t  GetMomentum() const {return fMom;}
  62                Int_t     GetN() const {return fN2;}
  63                Float_t   GetQuality(Bool_t kZcorr) const;
  64                Int_t     GetPlane() const                       { return fPlane;    }
  65                Double_t* GetProbability();
  66                Double_t  GetSnp() const {return fSnp;}
  67                Double_t  GetTgl() const {return fTgl;}
  68                Double_t  GetYat(Double_t x) const {return fYfitR[0] + fYfitR[1] * (x - fX0);}
  69                Double_t  GetZat(Double_t x) const {return fZfitR[0] + fZfitR[1] * (x - fX0);}
  70
  71                Bool_t    IsOwner() const {return fOwner;}
  72          void      Print(Option_t * /*o*/) const          { }
  73                void      Print();
  74
  75                void      SetMomentum(Double_t mom) {fMom = mom;}
  76                void      SetOwner(Bool_t own = kTRUE);
  77                void      SetPlane(Int_t p)                      { fPlane     = p;   }
  78                void      SetSnp(Double_t snp) {fSnp = snp;}
  79                void      SetTgl(Double_t tgl) {fTgl = tgl;}
  80
  81  protected:
  82
  83         void Copy(TObject &ref) const;
  84
  85  private:
  86
  87         Int_t            fPlane;                  //  TRD plane
  88         Bool_t           fOwner;                  //  Toggle ownership of clusters
  89         Float_t          fMom;                    //  Momentum estimate for tracklet [GeV/c]
  90         Float_t          fSnp;                    // sin of track with respect to x direction in XY plane
  91         Float_t          fTgl;                    // tg of track with respect to x direction in XZ plane
  92         Float_t          fdX;                     // length of time bin
  93         Float_t          fdEdx[knSlices];         //  dE/dx measurements for tracklet
  94         Double_t         fProb[AliPID::kSPECIES]; //  PID probabilities
  95
  96         ClassDef(AliTRDseedV1, 1)                 //  New TRD seed
  97
  98 };
  99
 100 //____________________________________________________________
 101 inline Float_t AliTRDseedV1::GetChi2Z(const Float_t z) const
 102 {
 103         Float_t z1  = (z == 999.) ? fMeanz : z;
 104         Float_t chi = fZref[0] - z1;
 105         return chi*chi;
 106 }
 107
 108 //____________________________________________________________
 109 inline Float_t AliTRDseedV1::GetChi2Y(const Float_t y) const
 110 {
 111         Float_t y1  = (y == 999.) ? fYfitR[0] : y;
 112         Float_t chi = fYref[0] - y1;
 113         return chi*chi;
 114 }
 115
 116 //____________________________________________________________
 117 inline void AliTRDseedV1::Init(const AliRieman *rieman)
 118 {
 119         fZref[0] = rieman->GetZat(fX0);
 120         fZref[1] = rieman->GetDZat(fX0);
 121         fYref[0] = rieman->GetYat(fX0);
 122         fYref[1] = rieman->GetDYat(fX0);
 123 }
 124
 125 #endif
 126