Correct reading of data file.
[u/mrichter/AliRoot.git] / TRD / AliTRDtrackerV1.h
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e4f2f73d 1#ifndef ALITRDTRACKERV1_H
2#define ALITRDTRACKERV1_H
eb38ed55 3
e4f2f73d 4/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
7/* $Id$ */
8
9////////////////////////////////////////////////////////////////////////////
10// //
11// The TRD tracker //
12// //
13// Authors: //
eb38ed55 14// Marian Ivanov <M.Ivanov@gsi.de> //
e4f2f73d 15// Alex Bercuci <A.Bercuci@gsi.de> //
eb38ed55 16// Jouri Belikov <J.Belikov@cern.ch> //
e4f2f73d 17// Markus Fasel <M.Fasel@gsi.de> //
18// //
eb38ed55 19////////////////////////////////////////////////////////////////////////////
e4f2f73d 20
eb38ed55 21#ifndef ALITRACKER_H
22#include "AliTracker.h"
e4f2f73d 23#endif
24
eb38ed55 25#ifndef ALITRDTRACKINGSECTOR_H
26#include "AliTRDtrackingSector.h"
27#endif
e4f2f73d 28
29/**************************************************************************
30 * Class Status see source file *
31 **************************************************************************/
32
33class TFile;
34class TTreeSRedirector;
35class TClonesArray;
eb38ed55 36class TLinearFitter;
e4f2f73d 37
38class AliRieman;
39class AliESDEvent;
eb38ed55 40class AliCluster;
3a039a31 41class AliTrackPoint;
e4f2f73d 42
eb38ed55 43class AliTRDcluster;
e4f2f73d 44class AliTRDseedV1;
eb38ed55 45class AliTRDtrackingChamber;
46class AliTRDchamberTimeBin;
e4f2f73d 47class AliTRDtrackerFitter;
0906e73e 48class AliTRDtrackV1;
3a039a31 49class AliTRDReconstructor;
eb38ed55 50class AliTRDtrackerV1 : public AliTracker
e4f2f73d 51{
eb38ed55 52public:
3b57a3f7 53 enum{
66f6bfd9 54 kOwner = BIT(14)
55 };
56 enum{
3b57a3f7 57 kMaxLayersPerSector = 1000
58 , kMaxTimeBinIndex = 216
59 , kTrackingSectors = 18
60 , kNTimeBins = 35
61 , kNPlanes = 6
62 , kNSeedPlanes = 4
63 , kMaxTracksStack = 100
64 , kNConfigs = 15
65 };
3a039a31 66 AliTRDtrackerV1(AliTRDReconstructor *rec = 0x0);
3b57a3f7 67 virtual ~AliTRDtrackerV1();
e4f2f73d 68
eb38ed55 69 //temporary
70 AliTRDtrackingSector* GetTrackingSector(Int_t sec) {return &fTrSec[sec];}
71
3b57a3f7 72 Int_t Clusters2Tracks(AliESDEvent *esd);
3b57a3f7 73 AliCluster* GetCluster(Int_t index) const;
74 AliTRDseedV1* GetTracklet(Int_t index) const;
75 AliKalmanTrack* GetTrack(Int_t index) const;
4f57cad7 76 TClonesArray* GetListOfClusters() const {return fClusters;}
77 TClonesArray* GetListOfTracklets() const {return fTracklets;}
78 TClonesArray* GetListOfTracks() const {return fTracks;}
79 static Int_t GetNTimeBins() {return fgNTimeBins;}
3b57a3f7 80 static void GetExtrapolationConfig(Int_t iconfig, Int_t planes[2]);
81 static void GetSeedingConfig(Int_t iconfig, Int_t planes[4]);
82 static TLinearFitter* GetTiltedRiemanFitter();
83 static TLinearFitter* GetTiltedRiemanFitterConstraint();
84 static AliRieman* GetRiemanFitter();
85 static void FitRieman(AliTRDcluster **clusters, Double_t chi2[2]);
86 static Float_t FitRieman(AliTRDseedV1 *tracklets, Double_t *chi2, Int_t *planes = 0x0);
87 static Float_t FitTiltedRiemanConstraint(AliTRDseedV1 *tracklets, Double_t zVertex);
88 static Float_t FitTiltedRieman(AliTRDseedV1 *tracklets, Bool_t sigError);
eb38ed55 89
6e4d4425 90 static Double_t FitRiemanTilt(const AliTRDtrackV1 *trk, AliTRDseedV1 *tracklets = 0x0, Bool_t err=0, Int_t np = 0, AliTrackPoint *points = 0x0);
91 static Double_t FitLine(const AliTRDtrackV1 *trk, AliTRDseedV1 *tracklets = 0x0, Bool_t err=0, Int_t np = 0, AliTrackPoint *points = 0x0);
1bf51039 92 static Double_t FitKalman(AliTRDtrackV1 *trk, AliTRDseedV1 *tracklets = 0x0, Bool_t up=0, Int_t np = 0, AliTrackPoint *points = 0x0);
8acca6a3 93
66f6bfd9 94 Bool_t IsClustersOwner() const {return TestBit(kOwner);}
95 void SetClustersOwner(Bool_t own=kTRUE) {SetBit(kOwner, own); if(!own) fClusters = 0x0;}
96
3b57a3f7 97 Int_t FollowBackProlongation(AliTRDtrackV1 &t);
98 Int_t FollowProlongation(AliTRDtrackV1 &t);
99 Int_t LoadClusters(TTree *cTree);
66f6bfd9 100 Int_t LoadClusters(TClonesArray *clusters);
3b57a3f7 101 Int_t PropagateBack(AliESDEvent *event);
0e08101e 102 static Int_t PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep);
3b57a3f7 103 Int_t ReadClusters(TClonesArray* &array, TTree *in) const;
104 Int_t RefitInward(AliESDEvent *event);
105 static void SetNTimeBins(Int_t nTimeBins){fgNTimeBins = nTimeBins; }
29f95561 106 void SetReconstructor(const AliTRDReconstructor *rec){ fReconstructor = rec; }
3b57a3f7 107 void UnloadClusters();
fac58f00 108// void UseClusters(const AliKalmanTrack *t, Int_t from = 0) const;
109// static Int_t Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down); // to be removed
3b57a3f7 110
111 class AliTRDLeastSquare{
112 public:
113 AliTRDLeastSquare();
114 ~AliTRDLeastSquare(){};
115
116 void AddPoint(Double_t *x, Double_t y, Double_t sigmaY);
117 void RemovePoint(Double_t *x, Double_t y, Double_t sigmaY);
118 void Eval();
119
120 Double_t GetFunctionParameter(Int_t ParNumber) const {return fParams[ParNumber];}
121 Double_t GetFunctionValue(Double_t *xpos) const;
122 void GetCovarianceMatrix(Double_t *storage) const;
123 private:
124 AliTRDLeastSquare(const AliTRDLeastSquare &);
125 AliTRDLeastSquare& operator=(const AliTRDLeastSquare &);
126 Double_t fParams[2]; // Fitparameter
127 Double_t fCovarianceMatrix[3]; // Covariance Matrix
128 Double_t fSums[6]; // Sums
129 };
fbb2ea06 130
eb38ed55 131protected:
3b57a3f7 132 static Bool_t AdjustSector(AliTRDtrackV1 *track);
133 Double_t BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs);
66f6bfd9 134 Int_t BuildTrackingContainers();
3b57a3f7 135 static Float_t CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref);
136 Int_t Clusters2TracksSM(Int_t sector, AliESDEvent *esd);
137 Int_t Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList);
138 AliTRDseedV1* GetTracklet(AliTRDtrackV1 *trk, Int_t plane, Int_t &idx);
139 Bool_t GetTrackPoint(Int_t index, AliTrackPoint &p) const;
140 Int_t MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar);
141 AliTRDtrackV1* MakeTrack(AliTRDseedV1 *seeds, Double_t *params);
d20df6fc 142 AliTRDtrackV1* SetTrack(AliTRDtrackV1 *track);
3b57a3f7 143 AliTRDseedV1* SetTracklet(AliTRDseedV1 *tracklet);
e4f2f73d 144
0906e73e 145private:
3a039a31 146 AliTRDtrackerV1(const AliTRDtrackerV1 &tracker);
147 AliTRDtrackerV1 &operator=(const AliTRDtrackerV1 &tracker);
91834b8d 148 Double_t CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]);
3a039a31 149 Double_t CalculateTrackLikelihood(AliTRDseedV1 *tracklets, Double_t *chi2);
150 Int_t ImproveSeedQuality(AliTRDtrackingChamber **stack, AliTRDseedV1 *tracklet);
151 static Float_t CalculateReferenceX(AliTRDseedV1 *tracklets);
152 void ResetSeedTB();
153 Float_t GetChi2Y(AliTRDseedV1 *tracklets) const;
154 Float_t GetChi2Z(AliTRDseedV1 *tracklets) const;
e4f2f73d 155
0906e73e 156private:
3a039a31 157 const AliTRDReconstructor *fReconstructor; // reconstructor manager
158 AliTRDgeometry *fGeom; // Pointer to TRD geometry
159 AliTRDtrackingSector fTrSec[kTrackingSectors]; // Array of tracking sectors;
e4f2f73d 160
bb56afff 161 TClonesArray *fClusters; // List of clusters
162 TClonesArray *fTracklets; // List of tracklets
163 TClonesArray *fTracks; // List of tracks
eb38ed55 164
165 // should go to the recoParam
166 static const Double_t fgkMaxChi2; // Max increment in track chi2
167 static const Float_t fgkMinClustersInTrack; // Min number of clusters in track
168 static const Float_t fgkLabelFraction; // Min fraction of same label
169 static const Double_t fgkMaxSnp; // Maximal snp for tracking
170 static const Double_t fgkMaxStep; // Maximal step for tracking
171
172 // stand alone tracking
2985ffcb 173 static Double_t fgTopologicQA[kNConfigs]; // Topologic quality
e4f2f73d 174 Double_t fTrackQuality[kMaxTracksStack]; // Track quality
175 Int_t fSeedLayer[kMaxTracksStack]; // Seed layer
d611c74f 176 AliTRDchamberTimeBin *fSeedTB[kNSeedPlanes]; // seeding time bin planes
e4f2f73d 177 Int_t fSieveSeeding; //! Seeding iterator
eb38ed55 178
2985ffcb 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
bb56afff 183
eb38ed55 184 ClassDef(AliTRDtrackerV1, 2) // TRD tracker development class
e4f2f73d 185
186};
187#endif