1 #ifndef ALIITSTRACKERUPGRADE_H
2 #define ALIITSTRACKERUPGRADE_H
6 #include "AliITStrackerMI.h"
7 #include "AliITSlayerUpgrade.h"
8 #include "AliITStrackMI.h"
10 /* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
11 * See cxx source for full Copyright notice */
14 ////////////////////////////////////////////////////
15 // ITS Upgrade Stand alone tracker class //
16 // Authors: A.Mastroserio C.Terrevoli //
17 // e-mail:annalisa.mastroserio@cern.ch //
18 // cristina.terrevoli@ba.infn.it //
19 // tracks are saved as AliITStrackV2 objects //
20 ////////////////////////////////////////////////////
22 #include <TClonesArray.h>
24 class AliITSclusterTable;
26 class AliITSsegmentationUpgrade;
33 class AliITStrackerUpgrade : public AliITStrackerMI {
38 AliITStrackerUpgrade();
39 AliITStrackerUpgrade(const AliITStrackerUpgrade& tracker);
40 AliITStrackerUpgrade& operator=(const AliITStrackerUpgrade& source);
41 virtual ~AliITStrackerUpgrade();
42 virtual Int_t Clusters2Tracks(AliESDEvent *event);
43 Int_t FindTracks(AliESDEvent* event,Bool_t useAllClusters=kFALSE);
44 Int_t PropagateBack(AliESDEvent *event);
45 Int_t CorrectForPipeMaterial(AliITStrackMI *t, TString direction="inward");
46 Int_t RefitInward(AliESDEvent *event);//{return 0;}
47 AliCluster *GetCluster(Int_t index) const;
49 AliITStrackV2* FitTrack(AliITStrackSA* tr,Double_t* primaryVertex,Bool_t onePoint=kFALSE);
50 void StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) /*const*/;
51 Int_t FindTrackLowChiSquare() const;
52 Int_t LoadClusters(TTree *clusTree);
53 void SetVertex(AliESDVertex *vtx){fVert = vtx;}
54 void SetClusterTree(TTree * itscl){fITSclusters = itscl;}
56 void SetOutwardFinding() {fInwardFlag=kFALSE;}
57 void SetInwardFinding() {fInwardFlag=kTRUE;}
58 void SetOuterStartLayer(Int_t osl = 0) {
59 if(osl>(fNLayer-2)) AliWarning("Minimum Number of layers is 2. OuterStartLayer set to Nlayers-2");
60 fOuterStartLayer = TMath::Min(fNLayer-2,osl);
62 Int_t GetOuterStartLayer() const {return fOuterStartLayer;}
63 void SetInnerStartLayer(Int_t isl = 5) {
64 if(isl<1) AliWarning("Minimum Number of layers is 2. InnerStartLayer set to 1");
65 fInnerStartLayer = TMath::Max(1,isl);
67 Int_t GetInnerStartLayer() const {return fInnerStartLayer;}
68 void SetSAFlag(Bool_t fl){fITSStandAlone=fl;} // StandAlone flag setter
69 Bool_t GetSAFlag() const {return fITSStandAlone;} // StandAlone flag gett
70 void SetFixedWindowSizes(Int_t n=46, Double_t *phi=0, Double_t *lam=0);
71 void SetCalculatedWindowSizes(Int_t n=10, Float_t phimin=0.002, Float_t phimax=0.0145, Float_t lambdamin=0.003, Float_t lambdamax=0.008);
72 void UnloadClusters();
73 void SetMinNPoints(Int_t np){fMinNPoints=np;}
74 Int_t GetMinNPoints() const {return fMinNPoints;}
75 void SetMinimumChargeSDDSSD(Float_t minq=0.){fMinQ=minq;}
76 enum {kSAflag=0x8000}; //flag to mark clusters used in the SA tracker
82 void CreateLayers(Int_t iEvent);
83 void ResetForFinding();
85 Bool_t SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex);
86 static Double_t Curvature(Double_t x1,Double_t y1,Double_t x2,Double_t y2,
87 Double_t x3,Double_t y3);
89 Double_t ChoosePoint(Double_t p1, Double_t p2, Double_t pp);
91 static Int_t FindIntersection(Float_t a1, Float_t b1, Float_t c1, Float_t c2,
92 Float_t& x1,Float_t& y1, Float_t& x2, Float_t& y2);
93 static Int_t FindEquation(Float_t x1, Float_t y1, Float_t x2, Float_t y2,
94 Float_t x3, Float_t y3,Float_t& a, Float_t& b,
97 static Int_t FindLabel(Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5, Int_t l6);
98 static Int_t Label(Int_t gl1, Int_t gl2, Int_t gl3, Int_t gl4, Int_t gl5,
99 Int_t gl6,Int_t gl7, Int_t gl8, Int_t gl9, Int_t gl10,Int_t gl11,
100 Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16,
101 Int_t gl17, Int_t gl18, Int_t numberofpoints=6);
103 Int_t SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow,
104 AliITStrackSA* trs,Double_t zvertex,Int_t flagp);
106 void GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda,Double_t &x,Double_t &y,Double_t &z,Double_t* vertex);
107 void GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz);
108 AliITSclusterTable* GetClusterCoord(Int_t layer,Int_t n) const {return (AliITSclusterTable*)fCluCoord[layer]->UncheckedAt(n);}
109 void RemoveClusterCoord(Int_t layer, Int_t n) {fCluCoord[layer]->RemoveAt(n);fCluCoord[layer]->Compress();}
110 Bool_t RefitAtBase(Double_t x, AliITStrackMI *track,
111 const Int_t *clusters);
112 Int_t UpdateMI(AliITStrackMI* track, const AliITSRecPoint* cl,Double_t chi2,Int_t layer) const;
113 Int_t CorrectForLayerMaterial(AliITStrackMI *t, Int_t layerindex, Double_t oldGlobXYZ[3], TString direction="inward");
114 Double_t GetPredictedChi2MI(AliITStrackMI* track, const AliITSRecPoint *cluster,Int_t layer);
115 static Int_t GetError(Int_t layer,const AliITSRecPoint*cl,
116 Float_t tgl,Float_t tgphitr,Float_t expQ,
117 Float_t &erry,Float_t &errz,Float_t &covyz,
118 Bool_t addMisalErr=kTRUE);
120 static Int_t GetErrorOrigRecPoint(const AliITSRecPoint*cl,
121 Float_t &erry,Float_t &errz,Float_t &covyz);
122 static void GetNTeor(Int_t layer,const AliITSRecPoint* cl,
123 Float_t tgl,Float_t tgphitr,
124 Float_t &ny,Float_t &nz);
126 Int_t fNLayer;//number of layer in ITSUpgrade
127 Double_t fPhiEstimate; //Estimation of phi angle on next layer
128 Bool_t fITSStandAlone; //Tracking is performed in the ITS alone if kTRUE
129 Float_t fPoint1[2]; //! coord. of 1-st point to evaluate the curvature
130 Float_t fPoint2[2]; //! coord. of 2-nd point to evaluate the curvature
131 Float_t fPoint3[2]; //! coord. of 3-rd point to evaluate the curvature
132 Float_t fPointc[2]; //! current point coord (for curvature eval.)
133 Double_t fLambdac; //! current value of the Lambda angle in the window
134 Double_t fPhic; //! current value of the Phi angle in the window
135 Float_t fCoef1; //! param. of the equation of the circ. approx a layer
136 Float_t fCoef2; //! param. of the equation of the circ. approx a layer
137 Float_t fCoef3; //! param. of the equation of the circ. approx a layer
138 Int_t fNloop; // Number of iterqations on phi and lambda windows
139 Double_t *fPhiWin; // phi window sizes
140 Double_t *fLambdaWin; // lambda window sizes
141 AliESDVertex *fVert; //! primary vertex
142 AliITSVertexer *fVertexer; //! vertexer
143 TClonesArray *fListOfTracks; //! container for found tracks
144 TClonesArray *fListOfSATracks; //! container for found SA tracks
145 TTree *fITSclusters; //! pointer to ITS tree of clusters
146 Bool_t fInwardFlag; // set to kTRUE for inward track finding
147 Int_t fOuterStartLayer; // Outward search for tracks with <6 points: outer layer to start from
148 Int_t fInnerStartLayer; // Inward search for tracks with <6 points: inner layer to start from
149 Int_t fMinNPoints; // minimum number of clusters for a track
150 Float_t fMinQ; // lower cut on cluster charge (SDD and SSD)
151 AliITSlayerUpgrade** fLayers;
152 AliITSsegmentationUpgrade *fSegmentation;
154 TClonesArray** fCluLayer; //! array with clusters
155 TClonesArray** fCluCoord; //! array with cluster info
157 ClassDef(AliITStrackerUpgrade,2)