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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 | /* $Id$ */ | |
13 | ||
14 | ||
15 | //////////////////////////////////////////////////// | |
16 | // Stand alone tracker class // | |
17 | // Origin: Elisabetta Crescio // | |
18 | // e-mail: crescio@to.infn.it // | |
19 | // adapted for cosmics by A.Dainese // | |
20 | //////////////////////////////////////////////////// | |
21 | ||
22 | class AliITSclusterTable; | |
23 | class AliITStrackSA; | |
24 | class AliESDVertex; | |
25 | class AliESDEvent; | |
26 | class AliITSVertexer; | |
27 | class TTree; | |
28 | class TArrayD; | |
29 | ||
30 | class AliITStrackerSA : public AliITStrackerMI { | |
31 | ||
32 | ||
33 | public: | |
34 | ||
35 | AliITStrackerSA(); | |
36 | AliITStrackerSA(const Char_t *geom); | |
37 | virtual ~AliITStrackerSA(); | |
38 | virtual Int_t Clusters2Tracks(AliESDEvent *event); | |
39 | Int_t FindTracks(AliESDEvent* event, Bool_t useAllClusters=kFALSE); | |
40 | ||
41 | AliITStrackV2* FitTrack(AliITStrackSA* tr,Double_t* primaryVertex,Bool_t onePoint=kFALSE); | |
42 | void StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) const; | |
43 | Int_t FindTrackLowChiSquare() const; | |
44 | Int_t LoadClusters(TTree *cf) {Int_t rc=AliITStrackerMI::LoadClusters(cf); SetClusterTree(cf); return rc;} | |
45 | ||
46 | void SetClusterTree(TTree * itscl){fITSclusters = itscl;} | |
47 | ||
48 | void SetOutwardFinding() {fInwardFlag=kFALSE;} | |
49 | void SetInwardFinding() {fInwardFlag=kTRUE;} | |
50 | void SetOuterStartLayer(Int_t osl = 0) { | |
51 | if(osl>(AliITSgeomTGeo::GetNLayers()-2)) AliWarning("Minimum Number of layers is 2. OuterStartLayer set to Nlayers-2"); | |
52 | fOuterStartLayer = TMath::Min(AliITSgeomTGeo::GetNLayers()-2,osl); | |
53 | } | |
54 | Int_t GetOuterStartLayer() const {return fOuterStartLayer;} | |
55 | void SetInnerStartLayer(Int_t isl = 5) { | |
56 | if(isl<1) AliWarning("Minimum Number of layers is 2. InnerStartLayer set to 1"); | |
57 | fInnerStartLayer = TMath::Max(1,isl); | |
58 | } | |
59 | Int_t GetInnerStartLayer() const {return fInnerStartLayer;} | |
60 | ||
61 | void SetSAFlag(Bool_t fl){fITSStandAlone=fl;} // StandAlone flag setter | |
62 | Bool_t GetSAFlag() const {return fITSStandAlone;} // StandAlone flag getter | |
63 | void SetFixedWindowSizes(Int_t n=46, Double_t *phi=0, Double_t *lam=0); | |
64 | void SetCalculatedWindowSizes(Int_t n=10, Double_t phimin=0.002, Double_t phimax=0.0145, Double_t lambdamin=0.003, Double_t lambdamax=0.008); | |
65 | ||
66 | void SetMinNPoints(Int_t np){fMinNPoints=np;} | |
67 | Int_t GetMinNPoints() const {return fMinNPoints;} | |
68 | void SetMinimumChargeSDDSSD(Double_t minq=0.){fMinQ=minq;} | |
69 | enum {kSAflag=0x8000}; //flag to mark clusters used in the SA tracker | |
70 | protected: | |
71 | ||
72 | //Initialization | |
73 | void Init(); | |
74 | void ResetForFinding(); | |
75 | void UpdatePoints(); | |
76 | Bool_t SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex); | |
77 | static Double_t Curvature(Double_t x1,Double_t y1,Double_t x2,Double_t y2, | |
78 | Double_t x3,Double_t y3); | |
79 | ||
80 | Double_t ChoosePoint(Double_t p1, Double_t p2, Double_t pp); | |
81 | ||
82 | static Int_t FindIntersection(Double_t a1, Double_t b1, Double_t c1, Double_t c2, | |
83 | Double_t& x1,Double_t& y1, Double_t& x2, Double_t& y2); | |
84 | static Int_t FindEquation(Double_t x1, Double_t y1, Double_t x2, Double_t y2, | |
85 | Double_t x3, Double_t y3,Double_t& a, Double_t& b, | |
86 | Double_t& c); | |
87 | ||
88 | Int_t FindLabel(AliITStrackV2* track); | |
89 | Int_t SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, | |
90 | AliITStrackSA* trs,Double_t zvertex,Int_t flagp); | |
91 | ||
92 | void GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda,Double_t &x,Double_t &y,Double_t &z,const Double_t* vertex); | |
93 | void GetCoorErrors(AliITSRecPoint* cl,Double_t &sx,Double_t &sy, Double_t &sz); | |
94 | ||
95 | AliITSclusterTable* GetClusterCoord(Int_t layer,Int_t n) const {return (AliITSclusterTable*)fCluCoord[layer]->UncheckedAt(n);} | |
96 | void RemoveClusterCoord(Int_t layer, Int_t n) {fCluCoord[layer]->RemoveAt(n);fCluCoord[layer]->Compress();} | |
97 | ||
98 | Int_t FindIndex(Int_t lay, Double_t lamMin) const; | |
99 | ||
100 | Double_t fPhiEstimate; //Estimation of phi angle on next layer | |
101 | Bool_t fITSStandAlone; //Tracking is performed in the ITS alone if kTRUE | |
102 | Double_t fPoint1[2]; //! coord. of 1-st point to evaluate the curvature | |
103 | Double_t fPoint2[2]; //! coord. of 2-nd point to evaluate the curvature | |
104 | Double_t fPoint3[2]; //! coord. of 3-rd point to evaluate the curvature | |
105 | Double_t fPointc[2]; //! current point coord (for curvature eval.) | |
106 | Double_t fLambdac; //! current value of the Lambda angle in the window | |
107 | Double_t fPhic; //! current value of the Phi angle in the window | |
108 | Double_t fCoef1; //! param. of the equation of the circ. approx a layer | |
109 | Double_t fCoef2; //! param. of the equation of the circ. approx a layer | |
110 | Double_t fCoef3; //! param. of the equation of the circ. approx a layer | |
111 | Int_t fNloop; // Number of iterqations on phi and lambda windows | |
112 | Double_t *fPhiWin; // phi window sizes | |
113 | Double_t *fLambdaWin; // lambda window sizes | |
114 | TClonesArray *fListOfTracks; //! container for found tracks | |
115 | TClonesArray *fListOfSATracks; //! container for found SA tracks | |
116 | TTree *fITSclusters; //! pointer to ITS tree of clusters | |
117 | Bool_t fInwardFlag; // set to kTRUE for inward track finding | |
118 | Int_t fOuterStartLayer; // Outward search for tracks with <6 points: outer layer to start from | |
119 | Int_t fInnerStartLayer; // Inward search for tracks with <6 points: inner layer to start from | |
120 | Int_t fMinNPoints; // minimum number of clusters for a track | |
121 | Double_t fMinQ; // lower cut on cluster charge (SDD and SSD) | |
122 | ||
123 | TClonesArray** fCluCoord; //! array with cluster info | |
124 | ||
125 | private: | |
126 | AliITStrackerSA(const AliITStrackerSA& tracker); | |
127 | AliITStrackerSA& operator=(const AliITStrackerSA& source); | |
128 | ||
129 | ClassDef(AliITStrackerSA,12) | |
130 | }; | |
131 | ||
132 | #endif | |
133 | ||
134 |