TRD/AliTRDtrackerFitter.h

   1 #ifndef ALITRDTRACKERFITTER_H
   2 #define ALITRDTRACKERFITTER_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 //  Track fitter                                                             //
  11 //                                                                           //
  12 //  Authors:                                                                 //
  13 //    Alex Bercuci <A.Bercuci@gsi.de>                                        //
  14 //    Markus Fasel <M.Fasel@gsi.de>                                          //
  15 //                                                                           //
  16 ///////////////////////////////////////////////////////////////////////////////
  17
  18 #ifndef AliRIEMAN_H
  19 #include <AliRieman.h>
  20 #endif
  21
  22 #ifndef ROOT_Rtypes
  23 #include "Rtypes.h"
  24 #endif
  25
  26 // implementations in the future
  27 class TObject;
  28 class TLinearFitter;
  29 class TTreeSRedirector;
  30
  31 class AliTRDcluster;
  32 class AliTRDseedV1;
  33
  34 class AliTRDtrackerFitter : public TObject {
  35
  36  public:
  37
  38         AliTRDtrackerFitter();
  39         AliTRDtrackerFitter(const AliTRDtrackerFitter &f);
  40         AliTRDtrackerFitter& operator=(const AliTRDtrackerFitter &f);
  41         virtual ~AliTRDtrackerFitter();
  42
  43         void            Copy(TObject &f) const;
  44         AliRieman      *GetRiemanFitter() const { return fRieman1; }
  45         void            GetHyperplaneFitChi2(Double_t *chisquares) const;
  46         void            GetHyperplaneFitResults(Double_t *params) const;
  47         Double_t        GetRiemanCurvature() const { return fRieman1->GetC(); }
  48
  49         void            FitRieman(AliTRDcluster **cl, Int_t nLayers);
  50         void            FitRieman(AliTRDseedV1 *cseed, Int_t *planes=0x0);
  51         Double_t        FitHyperplane(AliTRDseedV1 *cseed, Double_t chi2ZF, Double_t zval);
  52         void            Reset();
  53         void            SetDebugStream(TTreeSRedirector *debug){fDebugStream = debug;}
  54         void            SetLayers(const Int_t nlayers) {fNlayers = nlayers;}
  55
  56  private:
  57
  58         // Linear fitters in planes
  59         TLinearFitter    *fFitterTC;       // Fitting with tilting pads - kz fixed - kz= Z/x, + vertex const
  60         TLinearFitter    *fFitterT2;       // Fitting with tilting pads - kz not fixed
  61         AliRieman        *fRieman1;        // Rieman fitter
  62         AliRieman        *fRieman2;        // Rieman fitter
  63         // Linear Fitter chisquares
  64         Double_t          fChi2TR;         // Chisquared
  65         Double_t          fChi2TC;         // Chisquared
  66         // Hyperplane Fit results
  67         Double_t          fCR;             // Track radius
  68         Double_t          fCC;             // Track curvature
  69         Double_t          fDca;            // DCA
  70         // Helping Parameters
  71         Double_t          fDzmf;           // Something
  72         Double_t          fZmf;            // Something else
  73         Int_t             fNlayers;        // Some layers
  74
  75         // Debug
  76         TTreeSRedirector *fDebugStream;    //! debugger
  77
  78         ClassDef(AliTRDtrackerFitter,1)    // TRD track fitter
  79 };
  80 #endif // ALITRDTRACKERFITTER_H