ITS/AliITSClusterParam.h

   1 #ifndef ALIITSCLUSTERPARAM_H
   2 #define ALIITSCLUSTERPARAM_H
   3 /* Copyright(c) 1998-2007, ALICE Experiment at CERN, All rights reserved. *
   4  * See cxx source for full Copyright notice                               */
   5
   6 /* $Id$ */
   7
   8 ////////////////////////////////////////////////////
   9 //                                                //
  10 //  ITS cluster error and shape parameterization  //
  11 //  andrea.dainese@lnl.infn.it                    //
  12 ////////////////////////////////////////////////////
  13
  14
  15 #include <TObject.h>
  16 #include "AliITSRecPoint.h"
  17
  18 //class TTree;
  19
  20 //_____________________________________________________________________________
  21 class AliITSClusterParam : public TObject {
  22  public:
  23   static AliITSClusterParam* Instance();
  24   AliITSClusterParam(){}
  25   virtual           ~AliITSClusterParam(){;}
  26   virtual void  Print(Option_t* option = "") const;
  27   void SetInstance(AliITSClusterParam *param){fgInstance = param;}
  28   static void GetNTeor(Int_t layer,const AliITSRecPoint* cl,
  29                        Float_t tgl,Float_t tgphitr,
  30                        Float_t &ny,Float_t &nz);
  31   static Int_t GetError(Int_t layer,const AliITSRecPoint*cl,
  32                         Float_t tgl,Float_t tgphitr,Float_t expQ,
  33                         Float_t &erry,Float_t &errz,Float_t &covyz,
  34                         Bool_t addMisalErr=kTRUE);
  35   static Int_t GetError(Int_t layer,const AliITSRecPoint*cl,
  36                         Float_t tgl,Float_t tgphitr,Float_t expQ,
  37                         Float_t &erry,Float_t &errz,
  38                         Bool_t addMisalErr=kTRUE) {
  39                                   Float_t covyz;
  40     return GetError(layer,cl,tgl,tgphitr,expQ,erry,errz,covyz,addMisalErr);
  41   }
  42
  43   //void FitData(TTree * tree);
  44   //
  45  protected:
  46   static AliITSClusterParam*   fgInstance; //! Instance of this class (singleton implementation)
  47   static Int_t GetErrorOrigRecPoint(const AliITSRecPoint*cl,
  48                                     Float_t &erry,Float_t &errz,Float_t &covyz);
  49   static Int_t GetErrorParamMI(Int_t layer,const AliITSRecPoint*cl,
  50                                Float_t tgl,Float_t tgphitr,Float_t expQ,
  51                                Float_t &erry,Float_t &errz);
  52   static Int_t GetErrorParamAngle(Int_t layer,const AliITSRecPoint*cl,
  53                                   Float_t tgl,Float_t tgphitr,
  54                                   Float_t &erry,Float_t &errz);
  55   static Int_t GetErrorParamAngleOld(Int_t layer,const AliITSRecPoint*cl,
  56                                   Float_t tgl,Float_t tgphitr,
  57                                   Float_t &erry,Float_t &errz);
  58
  59   ClassDef(AliITSClusterParam,1)    //  ITS cluster parametrization class
  60 };
  61
  62 #endif