Getting the geometry file from GRP - needed to determine the DDL mapping (Panos)
[u/mrichter/AliRoot.git] / ITS / AliITStrackerSA.h
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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
12////////////////////////////////////////////////////
13// Stand alone tracker class //
14// Origin: Elisabetta Crescio //
15// e-mail: crescio@to.infn.it //
36e140f1 16// adapted for cosmics by A.Dainese //
13918578 17////////////////////////////////////////////////////
18
19class AliITSclusterTable;
20class AliITStrackSA;
d681bb2d 21class AliESDVertex;
b8ed1a92 22class AliESDEvent;
13918578 23class AliITSVertexer;
2257f27e 24class TTree;
7e5bf5af 25class TArrayD;
13918578 26
e43c066c 27class AliITStrackerSA : public AliITStrackerMI {
13918578 28
29
30 public:
31
32 AliITStrackerSA();
cc088660 33 AliITStrackerSA(const Char_t *geom);
34 AliITStrackerSA(const Char_t *geom,AliESDVertex *vert);
35 AliITStrackerSA(const Char_t *geom,AliITSVertexer *vertexer);
7d62fb64 36 AliITStrackerSA(const AliITStrackerSA& tracker);
e399f961 37 AliITStrackerSA& operator=(const AliITStrackerSA& source);
13918578 38 virtual ~AliITStrackerSA();
af885e0f 39 virtual Int_t Clusters2Tracks(AliESDEvent *event);
40 Int_t FindTracks(AliESDEvent* event);
13918578 41
5a03f353 42 AliITStrackV2* FitTrack(AliITStrackSA* tr,Double_t* primaryVertex,Bool_t onePoint=kFALSE);
7e5bf5af 43 Int_t FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const;
b8ed1a92 44 Int_t LoadClusters(TTree *cf) {Int_t rc=AliITStrackerMI::LoadClusters(cf); SetClusterTree(cf); SetSixPoints(kTRUE); return rc;}
d681bb2d 45 void SetVertex(AliESDVertex *vtx){fVert = vtx;}
2257f27e 46 void SetClusterTree(TTree * itscl){fITSclusters = itscl;}
7e5bf5af 47 void SetSixPoints(Bool_t sp = kFALSE){fSixPoints = sp;}
2257f27e 48 Bool_t GetSixPoints() const {return fSixPoints;}
b8ed1a92 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;}
1966f03c 51 void SetSAFlag(Bool_t fl){fITSStandAlone=fl;} // StandAlone flag setter
52 Bool_t GetSAFlag() const {return fITSStandAlone;} // StandAlone flag getter
13918578 53 void SetWindowSizes(Int_t n=46, Double_t *phi=0, Double_t *lam=0);
13918578 54
627b6db6 55 enum {kSAflag=0x8000}; //flag to mark clusters used in the SA tracker
56
13918578 57 protected:
58
13918578 59 //Initialization
60 void Init();
4e05ab9a 61 void ResetForFinding();
62 void UpdatePoints();
13918578 63
64 static Double_t Curvature(Double_t x1,Double_t y1,Double_t x2,Double_t y2,
bef31448 65 Double_t x3,Double_t y3);
13918578 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);
bef31448 80
13918578 81 Int_t SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow,
cfe729e0 82 AliITStrackSA* trs,Double_t zvertex,Int_t flagp);
7e5bf5af 83
cc088660 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);
7e5bf5af 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
13918578 91 Double_t fPhiEstimate; //Estimation of phi angle on next layer
1966f03c 92 Bool_t fITSStandAlone; //Tracking is performed in the ITS alone if kTRUE
4e05ab9a 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.)
13918578 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
d681bb2d 105 AliESDVertex *fVert; //! primary vertex
13918578 106 AliITSVertexer *fVertexer; //! vertexer
4e05ab9a 107 TObjArray *fListOfTracks; //! container for found tracks
2257f27e 108 TTree *fITSclusters; //! pointer to ITS tree of clusters
2257f27e 109 Bool_t fSixPoints; // If true 6/6 points are required (default). 5/6 otherwise
b8ed1a92 110 Int_t fOuterStartLayer; // Search for tracks with <6 points: outer layer to start from
7e5bf5af 111
112 TClonesArray** fCluLayer; //! array with clusters
113 TClonesArray** fCluCoord; //! array with cluster info
114
b8ed1a92 115 ClassDef(AliITStrackerSA,6)
13918578 116};
117
118#endif
119