1 #ifndef ALITRACKFITTER_H
2 #define ALITRACKFITTER_H
4 /*************************************************************************
5 * AliTrackFitter: base class for the fast track fitters *
9 *************************************************************************/
12 #include <TMatrixDSymfwd.h>
14 #include "AliTrackPointArray.h"
15 #include "AliAlignObj.h"
19 class AliTrackFitter : public TObject {
24 AliTrackFitter(AliTrackPointArray *array, Bool_t owner = kTRUE);
25 AliTrackFitter(const AliTrackFitter &fitter);
26 AliTrackFitter& operator= (const AliTrackFitter& fitter);
27 virtual ~AliTrackFitter();
30 virtual void SetTrackPointArray(AliTrackPointArray *array, Bool_t owner = kTRUE);
31 virtual Bool_t Fit(const TArrayI *volIds,const TArrayI *volIdsFit = 0x0,
32 AliGeomManager::ELayerID layerRangeMin = AliGeomManager::kFirstLayer,
33 AliGeomManager::ELayerID layerRangeMax = AliGeomManager::kLastLayer);
35 virtual Bool_t Begin(Int_t, Int_t) = 0;
36 virtual Bool_t AddPoint(const AliTrackPoint *p) = 0;
37 virtual Bool_t Update() = 0;
39 virtual Bool_t GetPCA(const AliTrackPoint &pIn, AliTrackPoint &pOut) const = 0;
41 Bool_t FindVolId(const TArrayI *array, UShort_t volid) const;
43 void SetMinNPoints(Int_t n) { fMinNPoints = n;}
45 const Float_t* GetX() const {return fPoints->GetX();}
46 const Float_t* GetY() const {return fPoints->GetY();}
47 const Float_t* GetZ() const {return fPoints->GetZ();}
48 const Double_t* GetParam() const {return &fParams[0];}
49 const TMatrixDSym & GetCovariance() const {return *fCov;}
50 Float_t GetChi2() const {return fChi2;}
51 Int_t GetNdf() const {return fNdf;}
52 Int_t GetMinNPoints() const {return fMinNPoints;}
53 Float_t GetNormChi2() const { return (fNdf != 0) ? fChi2/fNdf : 0; }
54 void GetTrackResiduals(AliTrackPointArray*& pVolId, AliTrackPointArray*& pTrack) const
55 { pVolId = fPVolId; pTrack = fPTrack; }
59 Double_t fParams[6]; // Track parameters
60 TMatrixDSym *fCov; // Track cov matrix
61 AliTrackPointArray *fPoints; // Pointer to the array with track space points
62 AliTrackPointArray *fPVolId; // Pointer to the array with space-points in volId
63 AliTrackPointArray *fPTrack; // Pointer to the array with track extrapolation points in volId
64 Float_t fChi2; // Chi squared of the fit
65 Int_t fNdf; // Number of degrees of freedom
66 Int_t fMinNPoints; // Minimum allowed number of points
67 Bool_t fIsOwner; // Is the object owner of the space points array
71 ClassDef(AliTrackFitter,1) // Abstract class of fast track fitters