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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 | AliITStrackerSA(const Char_t *geom,AliESDVertex *vert); | |
38 | AliITStrackerSA(const Char_t *geom,AliITSVertexer *vertexer); | |
39 | virtual ~AliITStrackerSA(); | |
40 | virtual Int_t Clusters2Tracks(AliESDEvent *event); | |
41 | Int_t FindTracks(AliESDEvent* event, Bool_t useAllClusters=kFALSE); | |
42 | ||
43 | AliITStrackV2* FitTrack(AliITStrackSA* tr,Double_t* primaryVertex,Bool_t onePoint=kFALSE); | |
44 | void StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) const; | |
45 | Int_t FindTrackLowChiSquare() const; | |
46 | Int_t LoadClusters(TTree *cf) {Int_t rc=AliITStrackerMI::LoadClusters(cf); SetClusterTree(cf); return rc;} | |
47 | void SetVertex(AliESDVertex *vtx){fVert = vtx;} | |
48 | void SetClusterTree(TTree * itscl){fITSclusters = itscl;} | |
49 | ||
50 | void SetOutwardFinding() {fInwardFlag=kFALSE;} | |
51 | void SetInwardFinding() {fInwardFlag=kTRUE;} | |
52 | void SetOuterStartLayer(Int_t osl = 0) { | |
53 | if(osl>(AliITSgeomTGeo::GetNLayers()-2)) AliWarning("Minimum Number of layers is 2. OuterStartLayer set to Nlayers-2"); | |
54 | fOuterStartLayer = TMath::Min(AliITSgeomTGeo::GetNLayers()-2,osl); | |
55 | } | |
56 | Int_t GetOuterStartLayer() const {return fOuterStartLayer;} | |
57 | void SetInnerStartLayer(Int_t isl = 5) { | |
58 | if(isl<1) AliWarning("Minimum Number of layers is 2. InnerStartLayer set to 1"); | |
59 | fInnerStartLayer = TMath::Max(1,isl); | |
60 | } | |
61 | Int_t GetInnerStartLayer() const {return fInnerStartLayer;} | |
62 | ||
63 | void SetSAFlag(Bool_t fl){fITSStandAlone=fl;} // StandAlone flag setter | |
64 | Bool_t GetSAFlag() const {return fITSStandAlone;} // StandAlone flag getter | |
65 | void SetFixedWindowSizes(Int_t n=46, Double_t *phi=0, Double_t *lam=0); | |
66 | 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); | |
67 | ||
68 | void SetMinNPoints(Int_t np){fMinNPoints=np;} | |
69 | Int_t GetMinNPoints() const {return fMinNPoints;} | |
70 | void SetMinimumChargeSDDSSD(Float_t minq=0.){fMinQ=minq;} | |
71 | enum {kSAflag=0x8000}; //flag to mark clusters used in the SA tracker | |
72 | protected: | |
73 | ||
74 | //Initialization | |
75 | void Init(); | |
76 | void ResetForFinding(); | |
77 | void UpdatePoints(); | |
78 | Bool_t SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex); | |
79 | static Double_t Curvature(Double_t x1,Double_t y1,Double_t x2,Double_t y2, | |
80 | Double_t x3,Double_t y3); | |
81 | ||
82 | Double_t ChoosePoint(Double_t p1, Double_t p2, Double_t pp); | |
83 | ||
84 | static Int_t FindIntersection(Float_t a1, Float_t b1, Float_t c1, Float_t c2, | |
85 | Float_t& x1,Float_t& y1, Float_t& x2, Float_t& y2); | |
86 | static Int_t FindEquation(Float_t x1, Float_t y1, Float_t x2, Float_t y2, | |
87 | Float_t x3, Float_t y3,Float_t& a, Float_t& b, | |
88 | Float_t& c); | |
89 | ||
90 | Int_t FindLabel(AliITStrackV2* track); | |
91 | Int_t SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, | |
92 | AliITStrackSA* trs,Double_t zvertex,Int_t flagp); | |
93 | ||
94 | void GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda,Float_t &x,Float_t &y,Float_t &z,Double_t* vertex); | |
95 | void GetCoorErrors(AliITSRecPoint* cl,Float_t &sx,Float_t &sy, Float_t &sz); | |
96 | ||
97 | AliITSclusterTable* GetClusterCoord(Int_t layer,Int_t n) const {return (AliITSclusterTable*)fCluCoord[layer]->UncheckedAt(n);} | |
98 | void RemoveClusterCoord(Int_t layer, Int_t n) {fCluCoord[layer]->RemoveAt(n);fCluCoord[layer]->Compress();} | |
99 | ||
100 | ||
101 | Double_t fPhiEstimate; //Estimation of phi angle on next layer | |
102 | Bool_t fITSStandAlone; //Tracking is performed in the ITS alone if kTRUE | |
103 | Float_t fPoint1[2]; //! coord. of 1-st point to evaluate the curvature | |
104 | Float_t fPoint2[2]; //! coord. of 2-nd point to evaluate the curvature | |
105 | Float_t fPoint3[2]; //! coord. of 3-rd point to evaluate the curvature | |
106 | Float_t fPointc[2]; //! current point coord (for curvature eval.) | |
107 | Double_t fLambdac; //! current value of the Lambda angle in the window | |
108 | Double_t fPhic; //! current value of the Phi angle in the window | |
109 | Float_t fCoef1; //! param. of the equation of the circ. approx a layer | |
110 | Float_t fCoef2; //! param. of the equation of the circ. approx a layer | |
111 | Float_t fCoef3; //! param. of the equation of the circ. approx a layer | |
112 | Int_t fNloop; // Number of iterqations on phi and lambda windows | |
113 | Double_t *fPhiWin; // phi window sizes | |
114 | Double_t *fLambdaWin; // lambda window sizes | |
115 | AliESDVertex *fVert; //! primary vertex | |
116 | AliITSVertexer *fVertexer; //! vertexer | |
117 | TClonesArray *fListOfTracks; //! container for found tracks | |
118 | TClonesArray *fListOfSATracks; //! container for found SA tracks | |
119 | TTree *fITSclusters; //! pointer to ITS tree of clusters | |
120 | Bool_t fInwardFlag; // set to kTRUE for inward track finding | |
121 | Int_t fOuterStartLayer; // Outward search for tracks with <6 points: outer layer to start from | |
122 | Int_t fInnerStartLayer; // Inward search for tracks with <6 points: inner layer to start from | |
123 | Int_t fMinNPoints; // minimum number of clusters for a track | |
124 | Float_t fMinQ; // lower cut on cluster charge (SDD and SSD) | |
125 | ||
126 | TClonesArray** fCluLayer; //! array with clusters | |
127 | TClonesArray** fCluCoord; //! array with cluster info | |
128 | ||
129 | private: | |
130 | AliITStrackerSA(const AliITStrackerSA& tracker); | |
131 | AliITStrackerSA& operator=(const AliITStrackerSA& source); | |
132 | ||
133 | ClassDef(AliITStrackerSA,10) | |
134 | }; | |
135 | ||
136 | #endif | |
137 | ||
138 |