STEER/AliTrackFitter.h

   1 #ifndef ALITRACKFITTER_H
   2 #define ALITRACKFITTER_H
   3
   4 /*************************************************************************
   5  * AliTrackFitter: base class for the fast track fitters                 *
   6  *                                                                       *
   7  *                                                                       *
   8  *                                                                       *
   9  *************************************************************************/
  10
  11 #include <TObject.h>
  12 #include <TMatrixDSymfwd.h>
  13
  14 #include "AliTrackPointArray.h"
  15 #include "AliAlignObj.h"
  16
  17
  18 class AliTrackFitter : public TObject {
  19
  20  public:
  21
  22   AliTrackFitter();
  23   AliTrackFitter(AliTrackPointArray *array, Bool_t owner = kTRUE);
  24   AliTrackFitter(const AliTrackFitter &fitter);
  25   AliTrackFitter& operator= (const AliTrackFitter& fitter);
  26   virtual ~AliTrackFitter();
  27
  28   virtual void   Reset();
  29   virtual void   SetTrackPointArray(AliTrackPointArray *array, Bool_t owner = kTRUE);
  30   virtual Bool_t Fit(UShort_t volId,UShort_t volIdFit = 0,
  31                      AliAlignObj::ELayerID layerRangeMin = AliAlignObj::kFirstLayer,
  32                      AliAlignObj::ELayerID layerRangeMax = AliAlignObj::kLastLayer) = 0;
  33   virtual Bool_t GetPCA(const AliTrackPoint &pIn, AliTrackPoint &pOut) const = 0;
  34
  35   const Float_t* GetX() const {return fPoints->GetX();}
  36   const Float_t* GetY() const {return fPoints->GetY();}
  37   const Float_t* GetZ() const {return fPoints->GetZ();}
  38   const Double_t* GetParam() const {return &fParams[0];}
  39   const TMatrixDSym &  GetCovariance() const {return *fCov;}
  40   Float_t        GetChi2() const {return fChi2;}
  41   Int_t          GetNdf()  const {return fNdf;}
  42   Float_t        GetNormChi2() const { return (fNdf != 0) ? fChi2/fNdf : 0; }
  43   void           GetTrackResiduals(AliTrackPointArray*& pVolId, AliTrackPointArray*& pTrack) const
  44     { pVolId = fPVolId; pTrack = fPTrack; }
  45
  46  protected:
  47
  48   Double_t      fParams[6];    // Track parameters
  49   TMatrixDSym  *fCov;          // Track cov matrix
  50   AliTrackPointArray *fPoints; // Pointer to the array with track space points
  51   AliTrackPointArray *fPVolId; // Pointer to the array with space-points in volId
  52   AliTrackPointArray *fPTrack; // Pointer to the array with track extrapolation points in volId
  53   Float_t       fChi2;         // Chi squared of the fit
  54   Int_t         fNdf;          // Number of degrees of freedom
  55   Bool_t  fIsOwner;            // Is the object owner of the space points array
  56
  57  private:
  58
  59   ClassDef(AliTrackFitter,1) // Abstract class of fast track fitters
  60
  61 };
  62
  63 #endif