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 AliTRDtrackV1;
  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         void    Draw(Option_t* o = "");
  52         Bool_t  Fit();
  53
  54         Bool_t  Init(AliTRDtrackV1 *track);
  55         inline void      Init(const AliRieman *fit);
  56         Bool_t    IsOwner() const          { return TestBit(1);}
  57         Bool_t    IsRowCross() const       { return TestBit(2);}
  58
  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);}
  75
  76         void      Print(Option_t *o = "") const;
  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      SetSnp(Double_t snp) {fSnp = snp;}
  82         void      SetTgl(Double_t tgl) {fTgl = tgl;}
  83
  84  protected:
  85
  86         void Copy(TObject &ref) const;
  87
  88  private:
  89
  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
  98
  99         ClassDef(AliTRDseedV1, 1)                 //  New TRD seed
 100
 101 };
 102
 103 //____________________________________________________________
 104 inline Float_t AliTRDseedV1::GetChi2Z(const Float_t z) const
 105 {
 106         Float_t z1  = (z == 999.) ? fMeanz : z;
 107         Float_t chi = fZref[0] - z1;
 108         return chi*chi;
 109 }
 110
 111 //____________________________________________________________
 112 inline Float_t AliTRDseedV1::GetChi2Y(const Float_t y) const
 113 {
 114         Float_t y1  = (y == 999.) ? fYfitR[0] : y;
 115         Float_t chi = fYref[0] - y1;
 116         return chi*chi;
 117 }
 118
 119 //____________________________________________________________
 120 inline void AliTRDseedV1::Init(const AliRieman *rieman)
 121 {
 122         fZref[0] = rieman->GetZat(fX0);
 123         fZref[1] = rieman->GetDZat(fX0);
 124         fYref[0] = rieman->GetYat(fX0);
 125         fYref[1] = rieman->GetDYat(fX0);
 126 }
 127
 128 #endif
 129
 130