1 #ifndef ALIMUONTRACKRECONSTRUCTOR_H
2 #define ALIMUONTRACKRECONSTRUCTOR_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
9 /// \class AliMUONTrackReconstructor
10 /// \brief Class for the MUON track reconstruction
12 /////////////////////////////////////
13 /// MUON track reconstructor in ALICE
14 /////////////////////////////////////
17 #include "AliMUONConstants.h"
19 class AliMUONHitForRec;
26 class AliMUONTriggerTrack;
30 class AliMUONTrackReconstructor : public TObject {
33 AliMUONTrackReconstructor(AliMUONData* data); // default Constructor
34 virtual ~AliMUONTrackReconstructor(); // Destructor
36 // Parameters for track reconstruction: public methods
37 // Get and Set, Set to defaults
39 /// Return minimum value (GeV/c) of momentum in bending plane
40 Double_t GetMinBendingMomentum(void) const {return fMinBendingMomentum;}
41 /// Set minimum value (GeV/c) of momentum in bending plane
42 void SetMinBendingMomentum(Double_t MinBendingMomentum) {fMinBendingMomentum = MinBendingMomentum;}
44 /// Return maximum value (GeV/c) of momentum in bending plane
45 Double_t GetMaxBendingMomentum(void) const {return fMaxBendingMomentum;}
46 /// Set maximum value (GeV/c) of momentum in bending plane
47 void SetMaxBendingMomentum(Double_t MaxBendingMomentum) {fMaxBendingMomentum = MaxBendingMomentum;}
49 /// Return maximum Chi2 per degree of Freedom
50 Double_t GetMaxChi2(void) const {return fMaxChi2;}
51 /// Set maximum Chi2 per degree of Freedom
52 void SetMaxChi2(Double_t MaxChi2) {fMaxChi2 = MaxChi2;}
54 /// Return maximum square distance in units of the variance (maximum chi2)
55 Double_t GetMaxSigma2Distance(void) const {return fMaxSigma2Distance;}
56 /// Set maximum square distance in units of the variance (maximum chi2)
57 void SetMaxSigma2Distance(Double_t MaxSigma2Distance) {fMaxSigma2Distance = MaxSigma2Distance;}
59 /// Return chamber resolution (cm) in bending plane
60 Double_t GetBendingResolution(void) const {return fBendingResolution;}
61 /// Set chamber resolution (cm) in bending plane
62 void SetBendingResolution(Double_t BendingResolution) {fBendingResolution = BendingResolution;}
64 /// Return chamber resolution (cm) in non-bending plane
65 Double_t GetNonBendingResolution(void) const {return fNonBendingResolution;}
66 /// set chamber resolution (cm) in non-bending plane
67 void SetNonBendingResolution(Double_t NonBendingResolution) {fNonBendingResolution = NonBendingResolution;}
69 /// Return chamber thickness in number of radiation lengths
70 Double_t GetChamberThicknessInX0(void) const {return fChamberThicknessInX0;}
71 /// Set chamber thickness in number of radiation lengths
72 void SetChamberThicknessInX0(Double_t ChamberThicknessInX0) {fChamberThicknessInX0 = ChamberThicknessInX0;}
74 /// Return simple magnetic field: value (kG)
75 Double_t GetSimpleBValue(void) const {return fSimpleBValue;}
76 /// Set simple magnetic field: value (kG)
77 void SetSimpleBValue(Double_t SimpleBValue) {fSimpleBValue = SimpleBValue;}
79 /// Return simple magnetic field: length (cm)
80 Double_t GetSimpleBLength(void) const {return fSimpleBLength;}
81 /// Set simple magnetic field: length (cm)
82 void SetSimpleBLength(Double_t SimpleBLength) {fSimpleBLength = SimpleBLength;}
84 /// Return simple magnetic field: Z central position (cm)
85 Double_t GetSimpleBPosition(void) const {return fSimpleBPosition;}
86 /// Set simple magnetic field: Z central position (cm)
87 void SetSimpleBPosition(Double_t SimpleBPosition) {fSimpleBPosition = SimpleBPosition;}
89 /// Return chamber efficiency (used for track ref. hits only
90 Double_t GetEfficiency(void) const {return fEfficiency;}
91 /// Set chamber efficiency (used for track ref. hits only
92 void SetEfficiency(Double_t Efficiency) {fEfficiency = Efficiency;}
94 void SetReconstructionParametersToDefaults(void);
96 /// Return track fitter
97 static TVirtualFitter* Fitter(void) {return fgFitter;}
99 /// Return number of hits for reconstruction
100 Int_t GetNHitsForRec(void) const {return fNHitsForRec;} // Number
102 /// Return number of reconstructed tracks
103 Int_t GetNRecTracks() const {return fNRecTracks;} // Number
104 /// Set number of reconstructed tracks
105 void SetNRecTracks(Int_t NRecTracks) {fNRecTracks = NRecTracks;}
107 /// Return array of reconstructed tracks
108 TClonesArray* GetRecTracksPtr(void) const {return fRecTracksPtr;} // Array
111 Double_t GetImpactParamFromBendingMomentum(Double_t BendingMomentum) const;
112 Double_t GetBendingMomentumFromImpactParam(Double_t ImpactParam) const;
113 void EventReconstruct(void);
114 void EventReconstructTrigger(void);
115 void EventDump(void); // dump reconstructed event
116 void EventDumpTrigger(void); // dump reconstructed trigger event
117 //PH void FillEvent(); // fill and write tree of reconstructed events
118 void SetTrackMethod(Int_t iTrackMethod); //AZ
119 /// Return track method
120 Int_t GetTrackMethod(void) const {return fTrackMethod;}
121 void FillMUONTrack(void); // set track parameters at hits for Kalman track
122 //Int_t fMuons; // AZ - number of muons within acceptance - just for tests
125 AliMUONData* GetMUONData() {return fMUONData;}
127 /// Set trigger circuit
128 void SetTriggerCircuit(TClonesArray* circuit) {fTriggerCircuit = circuit;}
133 // Defaults parameters for reconstruction
134 static const Double_t fgkDefaultMinBendingMomentum; ///< default min. bending momentum for reconstruction
135 static const Double_t fgkDefaultMaxBendingMomentum; ///< default max. bending momentum for reconstruction
136 static const Double_t fgkDefaultMaxChi2; ///< default max. track chi2 for reconstruction
137 static const Double_t fgkDefaultMaxSigma2Distance; ///< default square of max. distance for window size
138 static const Double_t fgkDefaultBendingResolution; ///< default bending coordinate resolution for reconstruction
139 static const Double_t fgkDefaultNonBendingResolution; ///< default non bending coordinate resolution for reconstruction
140 // Simple magnetic field:
141 // Value taken from macro MUONtracking.C: 0.7 T, hence 7 kG
142 // Length and Position from reco_muon.F, with opposite sign:
143 // Length = ZMAGEND-ZCOIL
144 // Position = (ZMAGEND+ZCOIL)/2
145 // to be ajusted differently from real magnetic field ????
146 static const Double_t fgkDefaultSimpleBValue; ///< default value of magnetic field (dipole)
147 static const Double_t fgkDefaultSimpleBLength; ///< default length of magnetic field (dipole)
148 static const Double_t fgkDefaultSimpleBPosition; ///< default position of magnetic field (dipole)
149 static const Double_t fgkDefaultEfficiency; ///< default chamber efficiency for track ref. hits recontruction
151 static TVirtualFitter* fgFitter; //!< Pointer to track fitter
153 Int_t fTrackMethod; ///< AZ - tracking method
155 // Parameters for track reconstruction
156 Double_t fMinBendingMomentum; ///< minimum value (GeV/c) of momentum in bending plane
157 // Parameters for track reconstruction
158 Double_t fMaxBendingMomentum; ///< maximum value (GeV/c) of momentum in bending plane
159 Double_t fMaxChi2; ///< maximum Chi2 per degree of Freedom
160 Double_t fMaxSigma2Distance; ///< maximum square distance in units of the variance (maximum chi2)
161 Double_t* fRMin; ///< minimum radius (cm)
162 Double_t* fRMax; ///< maximum radius (cm)
163 Double_t* fSegmentMaxDistBending; ///< maximum distance (cm) for segments in bending plane
164 Double_t* fSegmentMaxDistNonBending; ///< maximum distance (cm) for segments in non bending plane
165 Double_t fBendingResolution; ///< chamber resolution (cm) in bending plane
166 Double_t fNonBendingResolution; ///< chamber resolution (cm) in non bending plane
167 Double_t fChamberThicknessInX0; ///< chamber thickness in number of radiation lengths
168 // how to take it from simulation ????
169 Double_t fSimpleBValue; ///< simple magnetic field: value (kG)
170 Double_t fSimpleBLength; ///< simple magnetic field: length (cm)
171 Double_t fSimpleBPosition; ///< simple magnetic field: Z central position (cm)
172 Double_t fEfficiency; ///< chamber efficiency (used for track ref. hits only)
174 // Hits for reconstruction (should be in AliMUON ????)
175 TClonesArray* fHitsForRecPtr; ///< pointer to the array of hits for reconstruction
176 Int_t fNHitsForRec; ///< number of hits for reconstruction
177 // Information per chamber (should be in AliMUONChamber ????)
178 Int_t* fNHitsForRecPerChamber; ///< number of HitsForRec
179 Int_t* fIndexOfFirstHitForRecPerChamber; ///< index (0...) of first HitForRec
181 // Segments inside a station
182 TClonesArray** fSegmentsPtr; ///< array of pointers to the segments for each station
183 Int_t* fNSegments; ///< number of segments for each station
185 // Reconstructed tracks
186 TClonesArray *fRecTracksPtr; ///< pointer to array of reconstructed tracks
187 Int_t fNRecTracks; ///< number of reconstructed tracks
190 AliMUONData* fMUONData; ///< Data container for MUON subsystem
192 Int_t fMuons; ///< AZ - number of muons within acceptance - just for tests
194 AliMUONTriggerTrack* fTriggerTrack; ///< Trigger track structure
196 TClonesArray* fTriggerCircuit; //!< trigger circuit array
199 AliMUONTrackReconstructor (const AliMUONTrackReconstructor& rhs); // copy constructor
200 AliMUONTrackReconstructor& operator=(const AliMUONTrackReconstructor& rhs); // assignment operator
201 void ResetHitsForRec(void);
202 void MakeEventToBeReconstructed(void);
203 void AddHitsForRecFromRawClusters(TTree* TR);
204 void SortHitsForRecWithIncreasingChamber();
205 void MakeSegments(void);
206 void ResetSegments(void);
207 void MakeSegmentsPerStation(Int_t Station);
208 void MakeTracks(void);
209 Bool_t MakeTriggerTracks(void);
210 void ResetTracks(void);
211 void MakeTrackCandidates(void);
212 Int_t MakeTrackCandidatesWithTwoSegments(AliMUONSegment *BegSegment);
213 Int_t MakeTrackCandidatesWithOneSegmentAndOnePoint(AliMUONSegment *BegSegment);
214 void CalcTrackParamAtVertex(AliMUONTrack *Track);
215 void FollowTracks(void);
216 void Fit(AliMUONTrack *Track, Int_t FitStart, Int_t FitMCS);
217 void RemoveDoubleTracks(void);
218 void UpdateHitForRecAtHit(void);
219 void ValidateTracksWithTrigger(void);
222 //AZ - for Kalman Filter
223 void MakeTrackCandidatesK(void);
224 void FollowTracksK(void);
225 void RemoveDoubleTracksK(void);
226 void GoToVertex(void);
227 Bool_t CheckCandidateK(Int_t icand, Int_t nSeeds) const;
230 ClassDef(AliMUONTrackReconstructor, 0) // MUON track reconstructor in ALICE