1 #ifndef ALITRDTRACKERV1_H
2 #define ALITRDTRACKERV1_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
8 ////////////////////////////////////////////////////////////////////////////
13 // Marian Ivanov <M.Ivanov@gsi.de> //
14 // Alex Bercuci <A.Bercuci@gsi.de> //
15 // Jouri Belikov <J.Belikov@cern.ch> //
16 // Markus Fasel <M.Fasel@gsi.de> //
18 ////////////////////////////////////////////////////////////////////////////
21 #include "AliTracker.h"
24 #ifndef ALITRDTRACKINGSECTOR_H
25 #include "AliTRDtrackingSector.h"
28 /**************************************************************************
29 * Class Status see source file *
30 **************************************************************************/
33 class TTreeSRedirector;
44 class AliTRDtrackingChamber;
45 class AliTRDchamberTimeBin;
46 class AliTRDtrackerFitter;
48 class AliTRDReconstructor;
49 class AliTRDtrackerV1 : public AliTracker
56 kMaxLayersPerSector = 1000
57 , kMaxTimeBinIndex = 216
58 , kTrackingSectors = 18
62 , kMaxTracksStack = 100
65 AliTRDtrackerV1(AliTRDReconstructor *rec = 0x0);
66 virtual ~AliTRDtrackerV1();
69 AliTRDtrackingSector* GetTrackingSector(Int_t sec) {return &fTrSec[sec];}
71 Int_t Clusters2Tracks(AliESDEvent *esd);
72 AliCluster* GetCluster(Int_t index) const;
73 AliTRDseedV1* GetTracklet(Int_t index) const;
74 AliKalmanTrack* GetTrack(Int_t index) const;
75 TClonesArray* GetListOfClusters() const { return fClusters;}
76 TClonesArray* GetListOfTracklets() const { return fTracklets;}
77 TClonesArray* GetListOfTracks() const { return fTracks;}
78 static Int_t GetNTimeBins() { return fgNTimeBins;}
79 static void GetExtrapolationConfig(Int_t iconfig, Int_t planes[2]);
80 static void GetSeedingConfig(Int_t iconfig, Int_t planes[4]);
81 static TLinearFitter* GetTiltedRiemanFitter();
82 static TLinearFitter* GetTiltedRiemanFitterConstraint();
83 static AliRieman* GetRiemanFitter();
84 static void FitRieman(AliTRDcluster **clusters, Double_t chi2[2]);
85 static Float_t FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *planes = 0x0);
86 static Float_t FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex);
87 static Float_t FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError);
89 static Double_t FitRiemanTilt(const AliTRDtrackV1 *trk, AliTRDseedV1 *tracklets = 0x0, Bool_t err=0, Int_t np = 0, AliTrackPoint *points = 0x0);
90 static Double_t FitLine(const AliTRDtrackV1 *trk, AliTRDseedV1 *tracklets = 0x0, Bool_t err=0, Int_t np = 0, AliTrackPoint *points = 0x0);
91 static Double_t FitKalman(AliTRDtrackV1 *trk, AliTRDseedV1 *tracklets = 0x0, Bool_t up=0, Int_t np = 0, AliTrackPoint *points = 0x0);
93 Bool_t IsClustersOwner() const { return TestBit(kOwner);}
94 void SetClustersOwner(Bool_t own=kTRUE) {SetBit(kOwner, own); if(!own) fClusters = 0x0;}
96 Int_t FollowBackProlongation(AliTRDtrackV1 &t);
97 Int_t FollowProlongation(AliTRDtrackV1 &t);
98 Int_t LoadClusters(TTree *cTree);
99 Int_t LoadClusters(TClonesArray *clusters);
100 Int_t PropagateBack(AliESDEvent *event);
101 static Int_t PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep);
102 Int_t ReadClusters(TClonesArray* &array, TTree *in) const;
103 Int_t RefitInward(AliESDEvent *event);
104 static void SetNTimeBins(Int_t nTimeBins){fgNTimeBins = nTimeBins; }
105 void SetReconstructor(const AliTRDReconstructor *rec){ fReconstructor = rec; }
106 void UnloadClusters();
107 // void UseClusters(const AliKalmanTrack *t, Int_t from = 0) const;
109 class AliTRDLeastSquare{
112 ~AliTRDLeastSquare(){};
114 void AddPoint(Double_t *x, Double_t y, Double_t sigmaY);
115 void RemovePoint(Double_t *x, Double_t y, Double_t sigmaY);
118 Double_t GetFunctionParameter(Int_t ParNumber) const {return fParams[ParNumber];}
119 Double_t GetFunctionValue(Double_t *xpos) const;
120 void GetCovarianceMatrix(Double_t *storage) const;
122 AliTRDLeastSquare(const AliTRDLeastSquare &);
123 AliTRDLeastSquare& operator=(const AliTRDLeastSquare &);
124 Double_t fParams[2]; // Fitparameter
125 Double_t fCovarianceMatrix[3]; // Covariance Matrix
126 Double_t fSums[6]; // Sums
130 static Bool_t AdjustSector(AliTRDtrackV1 *track);
131 Double_t BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs);
132 Int_t BuildTrackingContainers();
133 static Float_t CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref);
134 Int_t Clusters2TracksSM(Int_t sector, AliESDEvent *esd);
135 Int_t Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList);
136 AliTRDseedV1* GetTracklet(AliTRDtrackV1 *trk, Int_t plane, Int_t &idx);
137 Bool_t GetTrackPoint(Int_t index, AliTrackPoint &p) const;
138 Float_t GetR4Layer(Int_t ly) const { return fR[ly];}
139 Int_t MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar);
140 AliTRDtrackV1* MakeTrack(AliTRDseedV1 *seeds, Double_t *params);
141 AliTRDtrackV1* SetTrack(AliTRDtrackV1 *track);
142 AliTRDseedV1* SetTracklet(AliTRDseedV1 *tracklet);
145 AliTRDtrackerV1(const AliTRDtrackerV1 &tracker);
146 AliTRDtrackerV1 &operator=(const AliTRDtrackerV1 &tracker);
147 Double_t CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]);
148 Double_t CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2);
149 Int_t ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *tracklet);
150 static Float_t CalculateReferenceX(AliTRDseedV1 *tracklets);
152 Float_t GetChi2Y(AliTRDseedV1 *tracklets) const;
153 Float_t GetChi2Z(AliTRDseedV1 *tracklets) const;
156 const AliTRDReconstructor *fReconstructor; // reconstructor manager
157 AliTRDgeometry *fGeom; // Pointer to TRD geometry
158 AliTRDtrackingSector fTrSec[kTrackingSectors]; // Array of tracking sectors;
159 TClonesArray *fClusters; // List of clusters
160 TClonesArray *fTracklets; // List of tracklets
161 TClonesArray *fTracks; // List of tracks
162 Float_t fR[kNPlanes]; //! rough radial position of each TRD layer
164 // should go to the recoParam
165 static const Double_t fgkMaxChi2; // Max increment in track chi2
166 static const Float_t fgkMinClustersInTrack; // Min number of clusters in track
167 static const Float_t fgkLabelFraction; // Min fraction of same label
168 static const Double_t fgkMaxSnp; // Maximal snp for tracking
169 static const Double_t fgkMaxStep; // Maximal step for tracking
171 // stand alone tracking
172 static Double_t fgTopologicQA[kNConfigs]; // Topologic quality
173 Double_t fTrackQuality[kMaxTracksStack]; // Track quality
174 Int_t fSeedLayer[kMaxTracksStack]; // Seed layer
175 AliTRDchamberTimeBin *fSeedTB[kNSeedPlanes]; // seeding time bin planes
176 Int_t fSieveSeeding; //! Seeding iterator
178 static const Double_t fgkX0[kNPlanes]; // default values for the position of anode wire
179 static Int_t fgNTimeBins; // Timebins per plane in track prolongation
180 static TLinearFitter *fgTiltedRieman; // Fitter for the tilted Rieman fit without vertex constriant
181 static TLinearFitter *fgTiltedRiemanConstrained; // Fitter for the tilted Rieman fit with vertex constraint
182 static AliRieman *fgRieman; // Fitter for the untilted Rieman fit
184 ClassDef(AliTRDtrackerV1, 3) // TRD tracker - tracklet based tracking