new debugging structure in the reconstruction (Markus)
[u/mrichter/AliRoot.git] / TRD / AliTRDtrackerV1.h
1 #ifndef ALITRDTRACKERV1_H
2 #define ALITRDTRACKERV1_H
3
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:                                                              //
14 //    Marian Ivanov <M.Ivanov@gsi.de>                                     //
15 //    Alex Bercuci <A.Bercuci@gsi.de>                                     //
16 //    Jouri Belikov <J.Belikov@cern.ch>                                   //
17 //    Markus Fasel <M.Fasel@gsi.de>                                       //
18 //                                                                        //
19 ////////////////////////////////////////////////////////////////////////////
20
21 #ifndef ALITRACKER_H
22 #include "AliTracker.h"
23 #endif
24
25 #ifndef ALITRDTRACKINGSECTOR_H
26 #include "AliTRDtrackingSector.h"
27 #endif
28
29 /**************************************************************************
30  * Class Status see source file                                           *
31  **************************************************************************/
32  
33 class TFile;
34 class TTreeSRedirector;
35 class TClonesArray;
36 class TLinearFitter;
37
38 class AliRieman;
39 class AliESDEvent;
40 class AliCluster;
41 class AliTrackPoint;
42
43 class AliTRDcluster;
44 class AliTRDseedV1;
45 class AliTRDtrackingChamber;
46 class AliTRDchamberTimeBin;
47 class AliTRDtrackerFitter;
48 class AliTRDtrackV1;
49 class AliTRDReconstructor;
50 class AliTRDtrackerV1 : public AliTracker
51 {
52 public:
53   enum{
54     kOwner = BIT(14)
55   };
56   enum{
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   };
66   AliTRDtrackerV1(AliTRDReconstructor *rec = 0x0);
67   virtual ~AliTRDtrackerV1();
68   
69   //temporary
70   AliTRDtrackingSector* GetTrackingSector(Int_t sec) {return &fTrSec[sec];}
71   
72   Int_t           Clusters2Tracks(AliESDEvent *esd);
73   AliCluster*     GetCluster(Int_t index) const;
74   AliTRDseedV1*   GetTracklet(Int_t index) const;
75   AliKalmanTrack* GetTrack(Int_t index) const;
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;}
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);
89   
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);
92         static Double_t FitKalman(AliTRDtrackV1 *trk, AliTRDseedV1 *tracklets = 0x0, Bool_t up=0, Int_t np = 0, AliTrackPoint *points = 0x0);
93
94   Bool_t          IsClustersOwner() const {return TestBit(kOwner);}
95   void            SetClustersOwner(Bool_t own=kTRUE) {SetBit(kOwner, own); if(!own) fClusters = 0x0;}
96
97   Int_t           FollowBackProlongation(AliTRDtrackV1 &t);
98   Int_t           FollowProlongation(AliTRDtrackV1 &t);
99   Int_t           LoadClusters(TTree *cTree);
100   Int_t           LoadClusters(TClonesArray *clusters);
101   Int_t           PropagateBack(AliESDEvent *event);
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   
108   static Int_t    Freq(Int_t n, const Int_t *inlist, Int_t *outlist, Bool_t down); // to be removed 
109
110   class AliTRDLeastSquare{
111   public:
112     AliTRDLeastSquare();
113     ~AliTRDLeastSquare(){};
114     
115     void                AddPoint(Double_t *x, Double_t y, Double_t sigmaY);
116     void                RemovePoint(Double_t *x, Double_t y, Double_t sigmaY);
117     void                Eval();
118     
119     Double_t    GetFunctionParameter(Int_t ParNumber) const {return fParams[ParNumber];}
120     Double_t    GetFunctionValue(Double_t *xpos) const;
121     void                GetCovarianceMatrix(Double_t *storage) const;
122   private:
123           AliTRDLeastSquare(const AliTRDLeastSquare &);
124     AliTRDLeastSquare& operator=(const AliTRDLeastSquare &);
125     Double_t    fParams[2];                                             // Fitparameter 
126     Double_t    fCovarianceMatrix[3];                   // Covariance Matrix
127     Double_t    fSums[6];                                               // Sums
128   };
129
130 protected:
131   static Bool_t  AdjustSector(AliTRDtrackV1 *track); 
132   Double_t       BuildSeedingConfigs(AliTRDtrackingChamber **stack, Int_t *configs);
133   Int_t          BuildTrackingContainers();
134   static Float_t CalculateChi2Z(AliTRDseedV1 *tracklets, Double_t offset, Double_t slope, Double_t xref);
135   Int_t          Clusters2TracksSM(Int_t sector, AliESDEvent *esd);
136   Int_t          Clusters2TracksStack(AliTRDtrackingChamber **stack, TClonesArray *esdTrackList);
137   AliTRDseedV1*  GetTracklet(AliTRDtrackV1 *trk, Int_t plane, Int_t &idx);
138   Bool_t         GetTrackPoint(Int_t index, AliTrackPoint &p) const;    
139   Int_t          MakeSeeds(AliTRDtrackingChamber **stack, AliTRDseedV1 *sseed, Int_t *ipar);
140   AliTRDtrackV1* MakeTrack(AliTRDseedV1 *seeds, Double_t *params);
141   static Int_t   PropagateToX(AliTRDtrackV1 &t, Double_t xToGo, Double_t maxStep);
142   AliTRDtrackV1* SetTrack(AliTRDtrackV1 *track);
143   AliTRDseedV1*  SetTracklet(AliTRDseedV1 *tracklet);
144
145 private:
146   AliTRDtrackerV1(const AliTRDtrackerV1 &tracker);
147   AliTRDtrackerV1 &operator=(const AliTRDtrackerV1 &tracker);
148   Double_t              CookLikelihood(AliTRDseedV1 *cseed, Int_t planes[4]);
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;
155
156 private:
157   const AliTRDReconstructor *fReconstructor;                 // reconstructor manager
158   AliTRDgeometry      *fGeom;                          // Pointer to TRD geometry
159   AliTRDtrackingSector fTrSec[kTrackingSectors];       // Array of tracking sectors;    
160
161   TClonesArray        *fClusters;                       // List of clusters
162   TClonesArray        *fTracklets;                      // List of tracklets
163   TClonesArray        *fTracks;                         // List of tracks
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
173         static Double_t      fgTopologicQA[kNConfigs];        //  Topologic quality
174         Double_t             fTrackQuality[kMaxTracksStack];  //  Track quality 
175         Int_t                fSeedLayer[kMaxTracksStack];     //  Seed layer
176   AliTRDchamberTimeBin *fSeedTB[kNSeedPlanes]; // seeding time bin planes
177         Int_t                fSieveSeeding;                   //! Seeding iterator
178         
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
183         
184         ClassDef(AliTRDtrackerV1, 2)                          //  TRD tracker development class
185
186 };
187 #endif