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[u/mrichter/AliRoot.git] / ITS / AliITStrackerSA.h
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13918578 1#ifndef ALIITSTRACKERSA_H
2#define ALIITSTRACKERSA_H
3
4
5
e43c066c 6#include "AliITStrackerMI.h"
13918578 7
8/* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
9 * See cxx source for full Copyright notice */
10
11////////////////////////////////////////////////////
12// Stand alone tracker class //
13// Origin: Elisabetta Crescio //
14// e-mail: crescio@to.infn.it //
15////////////////////////////////////////////////////
16
17class AliITSclusterTable;
18class AliITStrackSA;
d681bb2d 19class AliESDVertex;
13918578 20class AliITSVertexer;
2257f27e 21class TTree;
13918578 22
e43c066c 23class AliITStrackerSA : public AliITStrackerMI {
13918578 24
25
26 public:
27
28 AliITStrackerSA();
2257f27e 29 AliITStrackerSA(AliITSgeom *geom);
d681bb2d 30 AliITStrackerSA(AliITSgeom *geom,AliESDVertex *vert);
13918578 31 AliITStrackerSA(AliITSgeom *geom,AliITSVertexer *vertexer);
32 AliITStrackerSA(AliITStrackerSA& tracker);
33 virtual ~AliITStrackerSA();
e43c066c 34 virtual Int_t Clusters2Tracks(AliESD *event){Int_t rc = AliITStrackerMI::Clusters2Tracks(event); if(!rc) rc=FindTracks(event); return rc;}
2257f27e 35 Int_t FindTracks(AliESD* event);
36 void FindTracks(TTree *out,Int_t evnumber=0);
13918578 37 AliITStrackV2* FitTrack(AliITStrackSA* tr,Double_t* primaryVertex,
2257f27e 38 Double_t *errorprimvert);
13918578 39
40 AliITStrackV2* FindTrackLowChiSquare(TObjArray* tracklist, Int_t dim) const;
e43c066c 41 Int_t LoadClusters(TTree *cf) {Int_t rc=AliITStrackerMI::LoadClusters(cf); SetClusterTree(cf);SetSixPoints(kTRUE); return rc;}
d681bb2d 42 void SetVertex(AliESDVertex *vtx){fVert = vtx;}
2257f27e 43 void SetClusterTree(TTree * itscl){fITSclusters = itscl;}
44 void SetSixPoints(Bool_t sp = kTRUE){fSixPoints = sp;}
45 Bool_t GetSixPoints() const {return fSixPoints;}
13918578 46 void SetWindowSizes(Int_t n=46, Double_t *phi=0, Double_t *lam=0);
4e05ab9a 47 void UseFoundTracksV2(Int_t evnum,TTree* treev2);
48 void UseFoundTracksV2(AliESD *event);
13918578 49
627b6db6 50 enum {kSAflag=0x8000}; //flag to mark clusters used in the SA tracker
51
13918578 52 protected:
53
54 // copy constructor (NO copy allowed: the constructor is protected
55 // to avoid misuse)
56 AliITStrackerSA(const AliITStrackerSA& trkr);
57 // assignment operator (NO assignment allowed)
58 AliITStrackerSA& operator=(const AliITStrackerSA& /* trkr */);
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);
13918578 83
13918578 84 Double_t fPhiEstimate; //Estimation of phi angle on next layer
4e05ab9a 85 Float_t fPoint1[2]; //! coord. of 1-st point to evaluate the curvature
86 Float_t fPoint2[2]; //! coord. of 2-nd point to evaluate the curvature
87 Float_t fPoint3[2]; //! coord. of 3-rd point to evaluate the curvature
88 Float_t fPointc[2]; //! current point coord (for curvature eval.)
13918578 89 Double_t fLambdac; //! current value of the Lambda angle in the window
90 Double_t fPhic; //! current value of the Phi angle in the window
91 Float_t fCoef1; //! param. of the equation of the circ. approx a layer
92 Float_t fCoef2; //! param. of the equation of the circ. approx a layer
93 Float_t fCoef3; //! param. of the equation of the circ. approx a layer
94 Int_t fNloop; // Number of iterqations on phi and lambda windows
95 Double_t *fPhiWin; // phi window sizes
96 Double_t *fLambdaWin; // lambda window sizes
d681bb2d 97 AliESDVertex *fVert; //! primary vertex
13918578 98 AliITSVertexer *fVertexer; //! vertexer
99 AliITSgeom *fGeom; //! ITS geometry
4e05ab9a 100 TObjArray *fListOfTracks; //! container for found tracks
2257f27e 101 TTree *fITSclusters; //! pointer to ITS tree of clusters
2257f27e 102 Bool_t fSixPoints; // If true 6/6 points are required (default). 5/6 otherwise
13918578 103 AliITSclusterTable* fTable; // table with clusters
104 ClassDef(AliITStrackerSA,1)
105};
106
107#endif
108