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13918578 | 1 | #ifndef ALIITSTRACKERSA_H |
2 | #define ALIITSTRACKERSA_H | |
3 | ||
4 | ||
5 | ||
36e140f1 | 6 | #include "AliITSgeomTGeo.h" |
e43c066c | 7 | #include "AliITStrackerMI.h" |
13918578 | 8 | |
9 | /* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. * | |
10 | * See cxx source for full Copyright notice */ | |
11 | ||
deae0246 | 12 | /* $Id$ */ |
13 | ||
14 | ||
13918578 | 15 | //////////////////////////////////////////////////// |
16 | // Stand alone tracker class // | |
17 | // Origin: Elisabetta Crescio // | |
18 | // e-mail: crescio@to.infn.it // | |
36e140f1 | 19 | // adapted for cosmics by A.Dainese // |
13918578 | 20 | //////////////////////////////////////////////////// |
21 | ||
22 | class AliITSclusterTable; | |
23 | class AliITStrackSA; | |
d681bb2d | 24 | class AliESDVertex; |
b8ed1a92 | 25 | class AliESDEvent; |
13918578 | 26 | class AliITSVertexer; |
2257f27e | 27 | class TTree; |
7e5bf5af | 28 | class TArrayD; |
13918578 | 29 | |
e43c066c | 30 | class AliITStrackerSA : public AliITStrackerMI { |
13918578 | 31 | |
32 | ||
33 | public: | |
34 | ||
35 | AliITStrackerSA(); | |
cc088660 | 36 | AliITStrackerSA(const Char_t *geom); |
13918578 | 37 | virtual ~AliITStrackerSA(); |
af885e0f | 38 | virtual Int_t Clusters2Tracks(AliESDEvent *event); |
3bfb5cac | 39 | Int_t FindTracks(AliESDEvent* event, Bool_t useAllClusters=kFALSE); |
13918578 | 40 | |
5a03f353 | 41 | AliITStrackV2* FitTrack(AliITStrackSA* tr,Double_t* primaryVertex,Bool_t onePoint=kFALSE); |
3bfb5cac | 42 | void StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) const; |
deae0246 | 43 | Int_t FindTrackLowChiSquare() const; |
12b1afb7 | 44 | Int_t LoadClusters(TTree *cf) {Int_t rc=AliITStrackerMI::LoadClusters(cf); SetClusterTree(cf); return rc;} |
50a4457d | 45 | |
2257f27e | 46 | void SetClusterTree(TTree * itscl){fITSclusters = itscl;} |
12b1afb7 | 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 | } | |
b8ed1a92 | 54 | Int_t GetOuterStartLayer() const {return fOuterStartLayer;} |
12b1afb7 | 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 | ||
1966f03c | 61 | void SetSAFlag(Bool_t fl){fITSStandAlone=fl;} // StandAlone flag setter |
62 | Bool_t GetSAFlag() const {return fITSStandAlone;} // StandAlone flag getter | |
c7d6d7b7 | 63 | void SetFixedWindowSizes(Int_t n=46, Double_t *phi=0, Double_t *lam=0); |
07e222ae | 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); |
13918578 | 65 | |
12b1afb7 | 66 | void SetMinNPoints(Int_t np){fMinNPoints=np;} |
67 | Int_t GetMinNPoints() const {return fMinNPoints;} | |
07e222ae | 68 | void SetMinimumChargeSDDSSD(Double_t minq=0.){fMinQ=minq;} |
627b6db6 | 69 | enum {kSAflag=0x8000}; //flag to mark clusters used in the SA tracker |
13918578 | 70 | protected: |
71 | ||
13918578 | 72 | //Initialization |
73 | void Init(); | |
4e05ab9a | 74 | void ResetForFinding(); |
75 | void UpdatePoints(); | |
12b1afb7 | 76 | Bool_t SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex); |
13918578 | 77 | static Double_t Curvature(Double_t x1,Double_t y1,Double_t x2,Double_t y2, |
bef31448 | 78 | Double_t x3,Double_t y3); |
13918578 | 79 | |
80 | Double_t ChoosePoint(Double_t p1, Double_t p2, Double_t pp); | |
81 | ||
07e222ae | 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); | |
13918578 | 87 | |
ee16fb28 | 88 | Int_t FindLabel(AliITStrackV2* track); |
13918578 | 89 | Int_t SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow, |
cfe729e0 | 90 | AliITStrackSA* trs,Double_t zvertex,Int_t flagp); |
7e5bf5af | 91 | |
50a4457d | 92 | void GetCoorAngles(AliITSRecPoint* cl,Double_t &phi,Double_t &lambda,Double_t &x,Double_t &y,Double_t &z,const Double_t* vertex); |
07e222ae | 93 | void GetCoorErrors(AliITSRecPoint* cl,Double_t &sx,Double_t &sy, Double_t &sz); |
7e5bf5af | 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 | ||
489c98fd | 98 | Int_t FindIndex(Int_t lay, Double_t lamMin) const; |
7e5bf5af | 99 | |
13918578 | 100 | Double_t fPhiEstimate; //Estimation of phi angle on next layer |
1966f03c | 101 | Bool_t fITSStandAlone; //Tracking is performed in the ITS alone if kTRUE |
07e222ae | 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.) | |
13918578 | 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 | |
07e222ae | 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 | |
13918578 | 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 | |
f2150e42 | 114 | TClonesArray *fListOfTracks; //! container for found tracks |
115 | TClonesArray *fListOfSATracks; //! container for found SA tracks | |
2257f27e | 116 | TTree *fITSclusters; //! pointer to ITS tree of clusters |
12b1afb7 | 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 | |
07e222ae | 121 | Double_t fMinQ; // lower cut on cluster charge (SDD and SSD) |
7e5bf5af | 122 | |
7e5bf5af | 123 | TClonesArray** fCluCoord; //! array with cluster info |
124 | ||
225cff59 | 125 | private: |
126 | AliITStrackerSA(const AliITStrackerSA& tracker); | |
127 | AliITStrackerSA& operator=(const AliITStrackerSA& source); | |
128 | ||
50a4457d | 129 | ClassDef(AliITStrackerSA,12) |
13918578 | 130 | }; |
131 | ||
132 | #endif | |
f2150e42 | 133 | |
134 |