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1 | #ifndef ALIITSTRACKERSA_H | |
2 | #define ALIITSTRACKERSA_H | |
3 | ||
4 | ||
5 | ||
6 | #include "AliITSgeomTGeo.h" | |
7 | #include "AliITStrackerMI.h" | |
8 | ||
9 | /* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. * | |
10 | * See cxx source for full Copyright notice */ | |
11 | ||
12 | //////////////////////////////////////////////////// | |
13 | // Stand alone tracker class // | |
14 | // Origin: Elisabetta Crescio // | |
15 | // e-mail: crescio@to.infn.it // | |
16 | // adapted for cosmics by A.Dainese // | |
17 | //////////////////////////////////////////////////// | |
18 | ||
19 | class AliITSclusterTable; | |
20 | class AliITStrackSA; | |
21 | class AliESDVertex; | |
22 | class AliESDEvent; | |
23 | class AliITSVertexer; | |
24 | class TTree; | |
25 | class TArrayD; | |
26 | ||
27 | class AliITStrackerSA : public AliITStrackerMI { | |
28 | ||
29 | ||
30 | public: | |
31 | ||
32 | AliITStrackerSA(); | |
33 | AliITStrackerSA(const Char_t *geom); | |
34 | AliITStrackerSA(const Char_t *geom,AliESDVertex *vert); | |
35 | AliITStrackerSA(const Char_t *geom,AliITSVertexer *vertexer); | |
36 | AliITStrackerSA(const AliITStrackerSA& tracker); | |
37 | AliITStrackerSA& operator=(const AliITStrackerSA& source); | |
38 | virtual ~AliITStrackerSA(); | |
39 | virtual Int_t Clusters2Tracks(AliESDEvent *event); | |
40 | Int_t FindTracks(AliESDEvent* event); | |
41 | ||
42 | AliITStrackV2* FitTrack(AliITStrackSA* tr,Double_t* primaryVertex); | |
43 | Int_t FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const; | |
44 | Int_t LoadClusters(TTree *cf) {Int_t rc=AliITStrackerMI::LoadClusters(cf); SetClusterTree(cf); SetSixPoints(kTRUE); return rc;} | |
45 | void SetVertex(AliESDVertex *vtx){fVert = vtx;} | |
46 | void SetClusterTree(TTree * itscl){fITSclusters = itscl;} | |
47 | void SetSixPoints(Bool_t sp = kFALSE){fSixPoints = sp;} | |
48 | Bool_t GetSixPoints() const {return fSixPoints;} | |
49 | void SetOuterStartLayer(Int_t osl = 0) {if(osl>(AliITSgeomTGeo::GetNLayers()-2)) osl=AliITSgeomTGeo::GetNLayers()-2; fOuterStartLayer = osl;} | |
50 | Int_t GetOuterStartLayer() const {return fOuterStartLayer;} | |
51 | void SetSAFlag(Bool_t fl){fITSStandAlone=fl;} // StandAlone flag setter | |
52 | Bool_t GetSAFlag() const {return fITSStandAlone;} // StandAlone flag getter | |
53 | void SetWindowSizes(Int_t n=46, Double_t *phi=0, Double_t *lam=0); | |
54 | ||
55 | enum {kSAflag=0x8000}; //flag to mark clusters used in the SA tracker | |
56 | ||
57 | protected: | |
58 | ||
59 | //Initialization | |
60 | void Init(); | |
61 | void ResetForFinding(); | |
62 | void UpdatePoints(); | |
63 | ||
64 | static Double_t Curvature(Double_t x1,Double_t y1,Double_t x2,Double_t y2, | |
65 | Double_t x3,Double_t y3); | |
66 | ||
67 | Double_t ChoosePoint(Double_t p1, Double_t p2, Double_t pp); | |
68 | ||
69 | static Int_t FindIntersection(Float_t a1, Float_t b1, Float_t c1, Float_t c2, | |
70 | Float_t& x1,Float_t& y1, Float_t& x2, Float_t& y2); | |
71 | static Int_t FindEquation(Float_t x1, Float_t y1, Float_t x2, Float_t y2, | |
72 | Float_t x3, Float_t y3,Float_t& a, Float_t& b, | |
73 | Float_t& c); | |
74 | ||
75 | static Int_t FindLabel(Int_t l1, Int_t l2, Int_t l3, Int_t l4, Int_t l5, Int_t l6); | |
76 | static Int_t Label(Int_t gl1, Int_t gl2, Int_t gl3, Int_t gl4, Int_t gl5, | |
77 | Int_t gl6,Int_t gl7, Int_t gl8, Int_t gl9, Int_t gl10,Int_t gl11, | |
78 | Int_t gl12, Int_t gl13, Int_t gl14,Int_t gl15, Int_t gl16, | |
79 | Int_t gl17, Int_t gl18, Int_t numberofpoints=6); | |
80 | ||
81 | Int_t SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, | |
82 | AliITStrackSA* trs,Double_t zvertex,Int_t flagp); | |
83 | ||
84 | void GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda,Float_t &x,Float_t &y,Float_t &z,Double_t* vertex); | |
85 | void GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz); | |
86 | ||
87 | AliITSclusterTable* GetClusterCoord(Int_t layer,Int_t n) const {return (AliITSclusterTable*)fCluCoord[layer]->UncheckedAt(n);} | |
88 | void RemoveClusterCoord(Int_t layer, Int_t n) {fCluCoord[layer]->RemoveAt(n);fCluCoord[layer]->Compress();} | |
89 | ||
90 | ||
91 | Double_t fPhiEstimate; //Estimation of phi angle on next layer | |
92 | Bool_t fITSStandAlone; //Tracking is performed in the ITS alone if kTRUE | |
93 | Float_t fPoint1[2]; //! coord. of 1-st point to evaluate the curvature | |
94 | Float_t fPoint2[2]; //! coord. of 2-nd point to evaluate the curvature | |
95 | Float_t fPoint3[2]; //! coord. of 3-rd point to evaluate the curvature | |
96 | Float_t fPointc[2]; //! current point coord (for curvature eval.) | |
97 | Double_t fLambdac; //! current value of the Lambda angle in the window | |
98 | Double_t fPhic; //! current value of the Phi angle in the window | |
99 | Float_t fCoef1; //! param. of the equation of the circ. approx a layer | |
100 | Float_t fCoef2; //! param. of the equation of the circ. approx a layer | |
101 | Float_t fCoef3; //! param. of the equation of the circ. approx a layer | |
102 | Int_t fNloop; // Number of iterqations on phi and lambda windows | |
103 | Double_t *fPhiWin; // phi window sizes | |
104 | Double_t *fLambdaWin; // lambda window sizes | |
105 | AliESDVertex *fVert; //! primary vertex | |
106 | AliITSVertexer *fVertexer; //! vertexer | |
107 | TObjArray *fListOfTracks; //! container for found tracks | |
108 | TTree *fITSclusters; //! pointer to ITS tree of clusters | |
109 | Bool_t fSixPoints; // If true 6/6 points are required (default). 5/6 otherwise | |
110 | Int_t fOuterStartLayer; // Search for tracks with <6 points: outer layer to start from | |
111 | ||
112 | TClonesArray** fCluLayer; //! array with clusters | |
113 | TClonesArray** fCluCoord; //! array with cluster info | |
114 | ||
115 | ClassDef(AliITStrackerSA,6) | |
116 | }; | |
117 | ||
118 | #endif | |
119 |