1 #ifndef ALIMUONTRACKK_H
2 #define ALIMUONTRACKK_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
7 // Revision of includes 07/05/2004
10 /// \class AliMUONTrack
11 /// \brief Kalman track in MUON arm of ALICE
16 #include <TMatrixDfwd.h>
19 class AliMUONEventRecoCombi;
20 class AliMUONHitForRec;
22 class AliMUONTrackReconstructor;
23 #include "AliMUONTrack.h"
25 class AliMUONTrackK : public AliMUONTrack {
29 AliMUONTrackK(); // Default constructor
30 virtual ~AliMUONTrackK(); // Destructor
32 AliMUONTrackK(AliMUONTrackReconstructor *TrackReconstructor, TClonesArray *hitForRec); // Constructor
33 AliMUONTrackK(AliMUONSegment *segment); // Constructor from a segment
35 // Pointer to hits on track
36 TObjArray* GetHitOnTrack(void) const {return fTrackHitsPtr;} // ptr. to hits on track
37 Int_t GetNTrackHits(void) const {return fNTrackHits;} // hits on track
38 Double_t GetTrackQuality(void) const {return fChi2;} // track quality
39 TMatrixD* GetTrackParameters(void) const {return fTrackPar;} // track parameters
40 Double_t GetZ(void) const {return fPosition;} // Z-coordinate of track
41 TMatrixD* GetCovariance(void) const {return fCovariance;} // covariance matrix
42 Int_t GetTrackDir(void) const {return fTrackDir;} // get track propagation direction
43 void SetTrackDir(Int_t iDir) {fTrackDir = iDir;} // set track propagation direction
44 Bool_t GetBPFlag(void) const {return fBPFlag;} // get backpropagation flag
45 void SetBPFlag(Bool_t BPFlag) {fBPFlag = BPFlag;} // set backpropagation flag
46 Int_t GetRecover(void) const {return fRecover;} // return recover flag
47 void SetRecover(Int_t iRecover) {fRecover = iRecover;} // set recover flag
48 AliMUONSegment* GetStartSegment(void) const {return fStartSegment;} // return seed segment
49 Bool_t KalmanFilter(Int_t ichamBeg, Int_t ichamEnd, Bool_t Back, Double_t zDipole1, Double_t zDipole2); // Kalman filter
50 void StartBack(void); // start backpropagator
51 void SetTrackQuality(Int_t iChi2); // compute track quality or Chi2
52 Bool_t KeepTrack(AliMUONTrackK* track0) const; // keep or discard track
53 void Kill(void); // kill track candidate
54 void Branson(void); // Branson correction
55 void GoToZ(Double_t zEnd); // propagate track to given Z
56 void GoToVertex(Int_t iflag); // propagate track to the vertex
57 Bool_t Smooth(void); // apply smoother
58 Double_t GetChi2PerPoint(Int_t iPoint) const; // return Chi2 at point
59 void Print(FILE *lun) const; // print track information
60 void Print(const char* /*opt*/) const {return;} // print track information
61 AliMUONHitForRec* GetHitLastOk(void); // get hit before the skipped one
62 Int_t GetStation0(void); // return seed station number
63 Int_t DebugLevel(void) const {return fgDebug;} // return debug level
64 void SetDebugLevel(Int_t iDebug) {fgDebug = iDebug;} // set debug level
65 void FillMUONTrack(void); // set track parameters as for AliMUONTrack
66 void SetTrackParam(AliMUONTrackParam *trackParam, TMatrixD *par, Double_t z); // fill AliMUONTrackParam object
68 // What is necessary for sorting TClonesArray's
69 Bool_t IsSortable() const { return kTRUE; }
70 Int_t Compare(const TObject* trackK) const; // "Compare" function for sorting
76 AliMUONTrackK (const AliMUONTrackK& source); // copy constructor
77 AliMUONTrackK& operator=(const AliMUONTrackK& source); // assignment operator
81 static Int_t fgDebug; // debug level
82 static Int_t fgNOfPoints; // number of points in event
83 //static AliMUON *fgMUON; // pointer to MUON module
84 static AliMUONTrackReconstructor *fgTrackReconstructor; // pointer to event reconstructor
85 static TClonesArray *fgHitForRec; // pointer to hits
86 static AliMUONEventRecoCombi *fgCombi; // pointer to combined cluster/track finder
88 AliMUONSegment *fStartSegment; // seed segment
89 Double_t fPosition; // Z-coordinate of track
90 Double_t fPositionNew; //! Z-coordinate of track
91 Double_t fChi2; // Chi2 of track
92 TObjArray *fTrackHitsPtr; // pointer to hits on track
93 Int_t fNTrackHits; // number of points on track
94 Int_t fTrackDir; // track direction (+(-) towards high (low) z)
95 Bool_t fBPFlag; // backpropagation flag (TRUE if backpropagation)
96 Int_t fRecover; // recover flag (!=0 if recovery procedure was applied)
97 AliMUONHitForRec *fSkipHit; // hit to skip during recovery procedure
99 TMatrixD *fTrackPar; // track parameters
100 TMatrixD *fTrackParNew; //! track parameters
101 TMatrixD *fCovariance; // covariance matrix
102 TMatrixD *fWeight; //! weight matrix (inverse of covariance)
105 TObjArray *fParExtrap; //! extrapolated track parameters
106 TObjArray *fParFilter; //! filtered track parameters
107 TObjArray *fParSmooth; //! smoothed track parameters
109 TObjArray *fCovExtrap; //! extrapolated covariance matrices
110 TObjArray *fCovFilter; //! filtered covariance matrices
112 TObjArray *fJacob; //! Jacobian matrices
115 TArrayD *fChi2Array; //!
116 TArrayD *fChi2Smooth; //!
120 void EvalCovariance(Double_t dZ);
121 void ParPropagation(Double_t zEnd);
122 void WeightPropagation(Double_t zEnd, Bool_t smooth);
123 void MSThin(Int_t sign);
124 void MSLine(Double_t dZ, Double_t X0);
125 Bool_t FindPoint(Int_t ichamb, Double_t zEnd, Int_t currIndx, Int_t iFB, AliMUONHitForRec *&hitAdd, Int_t iz);
126 void TryPoint(TMatrixD &point, const TMatrixD &pointWeight, TMatrixD &trackParTmp, Double_t &dChi2);
127 void SetGeantParam(Double_t *VGeant3, Int_t iFB);
128 void GetFromGeantParam(Double_t *VGeant3, Int_t iFB);
129 Bool_t Recover(void);
130 void AddMatrices(AliMUONTrackK *trackK, Double_t dChi2, AliMUONHitForRec *hitAdd);
131 void CreateMatrix(TObjArray *objArray);
132 void RemoveMatrices(Double_t zEnd);
133 void RemoveMatrices(AliMUONTrackK* trackK);
135 void SortHits(Int_t iflag, TObjArray *array);
136 void DropBranches(Int_t imax, TObjArray *hits);
137 void DropBranches(AliMUONSegment *segment);
138 Bool_t ExistDouble(AliMUONHitForRec *hit);
139 Bool_t ExistDouble(void);
143 static const Int_t fgkSize; // number of track parameters
144 static const Int_t fgkNSigma; //4; // acceptance window width in sigmas
145 static const Double_t fgkChi2max; //25; // chi2 cut in smoother for outlier detection
146 static const Int_t fgkTriesMax; // max number of attempts to find exact position during tracking
147 static const Double_t fgkEpsilon; // tracking precision (cm)
149 ClassDef(AliMUONTrackK,0) // Kalman track in MUON arm of ALICE