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 AliTRDstackLayer;
  31 class AliTRDcluster;
  32 class AliTRDrecoParam;
  33 class AliTRDtrack;
  34
  35 class AliTRDseedV1 : public AliTRDseed
  36 {
  37
  38   public:
  39
  40         enum {
  41           knSlices = 10
  42         };
  43
  44         AliTRDseedV1(Int_t layer = -1, AliTRDrecoParam *p=0x0);
  45         ~AliTRDseedV1();
  46         AliTRDseedV1(const AliTRDseedV1 &ref);
  47         AliTRDseedV1& operator=(const AliTRDseedV1 &ref);
  48
  49         Bool_t  AttachClustersIter(AliTRDstackLayer *layer, Float_t quality, Bool_t kZcorr = kFALSE
  50                                  , AliTRDcluster *c=0x0);
  51         Bool_t  AttachClusters(AliTRDstackLayer *layer, Bool_t kZcorr = kFALSE);
  52         void    CookdEdx(Int_t nslices);
  53         static  Float_t FitRiemanTilt(AliTRDseedV1 * cseed, Bool_t terror);
  54         Bool_t  Fit();
  55
  56                void      Init(AliTRDtrack *track);
  57         inline void      Init(const AliRieman *fit);
  58
  59         inline Float_t   GetChi2Z(const Float_t z = 0.) const;
  60         inline Float_t   GetChi2Y(const Float_t y = 0.) const;
  61                void      GetCovAt(Double_t x, Double_t *cov) const;
  62                Float_t*  GetdEdx() {return &fdEdx[0];}
  63                Float_t   GetdQdl(Int_t ic) const;
  64                Double_t  GetMomentum() const {return fMom;}
  65                Int_t     GetN() const {return fN2;}
  66                Float_t   GetQuality(Bool_t kZcorr) const;
  67                Int_t     GetPlane() const                       { return fPlane;    }
  68                Double_t* GetProbability();
  69                Double_t  GetSnp() const {return fSnp;}
  70                Double_t  GetTgl() const {return fTgl;}
  71                Double_t  GetYat(Double_t x) const {return fYfitR[0] + fYfitR[1] * (x - fX0);}
  72                Double_t  GetZat(Double_t x) const {return fZfitR[0] + fZfitR[1] * (x - fX0);}
  73
  74                Bool_t    IsOwner() const {return fOwner;}
  75          void      Print(Option_t * /*o*/) const          { }
  76                void      Print();
  77
  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      SetRecoParam(AliTRDrecoParam *p)       { fRecoParam = p;   }
  82                void      SetSnp(Double_t snp) {fSnp = snp;}
  83                void      SetTgl(Double_t tgl) {fTgl = tgl;}
  84
  85  protected:
  86
  87         void Copy(TObject &ref) const;
  88
  89  private:
  90
  91         Int_t            fPlane;                  //  TRD plane
  92         Bool_t           fOwner;                  //  Toggle ownership of clusters
  93         Float_t          fMom;                    //  Momentum estimate for tracklet [GeV/c]
  94         Float_t          fSnp;                    // sin of track with respect to x direction in XY plane
  95         Float_t          fTgl;                    // tg of track with respect to x direction in XZ plane
  96         Float_t          fdX;                     // length of time bin
  97         Float_t          fdEdx[knSlices];         //  dE/dx measurements for tracklet
  98         Double_t         fProb[AliPID::kSPECIES]; //  PID probabilities
  99         AliTRDrecoParam *fRecoParam;              //! Local copy of the reco params
 100
 101         ClassDef(AliTRDseedV1, 1)                 //  New TRD seed
 102
 103 };
 104
 105 //____________________________________________________________
 106 inline Float_t AliTRDseedV1::GetChi2Z(const Float_t z) const
 107 {
 108         Float_t z1  = (z == 0.) ? fMeanz : z;
 109         Float_t chi = fZref[0] - z1;
 110         return chi*chi;
 111 }
 112
 113 //____________________________________________________________
 114 inline Float_t AliTRDseedV1::GetChi2Y(const Float_t y) const
 115 {
 116         Float_t y1  = (y == 0.) ? fYfitR[0] : y;
 117         Float_t chi = fYref[0] - y1;
 118         return chi*chi;
 119 }
 120
 121 //____________________________________________________________
 122 inline void AliTRDseedV1::Init(const AliRieman *rieman)
 123 {
 124         fZref[0] = rieman->GetZat(fX0);
 125         fZref[1] = rieman->GetDZat(fX0);
 126         fYref[0] = rieman->GetYat(fX0);
 127         fYref[1] = rieman->GetDYat(fX0);
 128 }
 129
 130 #endif
 131