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Added version tailored for pp (AliTrackletTaskMultipp) with additional
[u/mrichter/AliRoot.git] / ITS / UPGRADE / AliITStrackerUpgrade.h
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1d9af2d5 1#ifndef ALIITSTRACKERUPGRADE_H
2#define ALIITSTRACKERUPGRADE_H
3
1d9af2d5 4/* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice */
6
7/* $Id$ */
8////////////////////////////////////////////////////
9// ITS Upgrade Stand alone tracker class //
10// Authors: A.Mastroserio C.Terrevoli //
11// e-mail:annalisa.mastroserio@cern.ch //
12// cristina.terrevoli@ba.infn.it //
13// tracks are saved as AliITStrackV2 objects //
14////////////////////////////////////////////////////
15
0ac80088 16
17
1d9af2d5 18#include <TClonesArray.h>
0ac80088 19#include "AliITSRecPointU.h"
20#include "AliITStrackerMI.h"
21#include "AliITSlayerUpgrade.h"
22#include "AliITStrackU.h"
1d9af2d5 23
24class AliITSclusterTable;
0b255a22 25class AliITStrackU;
db688ae2 26class AliITSsegmentationUpgrade;
1d9af2d5 27class AliESDVertex;
28class AliESDEvent;
29class AliITSVertexer;
30class TTree;
31class TArrayD;
32
33class AliITStrackerUpgrade : public AliITStrackerMI {
34
35
36 public:
37
38 AliITStrackerUpgrade();
665c0bc7 39 AliITStrackerUpgrade(Int_t nLay);
1d9af2d5 40 AliITStrackerUpgrade(const AliITStrackerUpgrade& tracker);
41 AliITStrackerUpgrade& operator=(const AliITStrackerUpgrade& source);
42 virtual ~AliITStrackerUpgrade();
4211bbc5 43 virtual Int_t Clusters2Tracks(AliESDEvent *event);
44 Int_t FindTracks(AliESDEvent* event,Bool_t useAllClusters=kFALSE);
1d9af2d5 45 Int_t PropagateBack(AliESDEvent *event);
4211bbc5 46 Int_t CorrectForPipeMaterial(AliITStrackU *t, TString direction="inward");
47 Int_t RefitInward(AliESDEvent *event);
1d9af2d5 48 AliCluster *GetCluster(Int_t index) const;
49
0b255a22 50 AliITStrackV2* FitTrack(AliITStrackU* tr,Double_t* primaryVertex,Bool_t onePoint=kFALSE);
1d9af2d5 51 void StoreTrack(AliITStrackV2 *t,AliESDEvent *event, Bool_t pureSA) /*const*/;
52 Int_t FindTrackLowChiSquare() const;
53 Int_t LoadClusters(TTree *clusTree);
54 void SetVertex(AliESDVertex *vtx){fVert = vtx;}
55 void SetClusterTree(TTree * itscl){fITSclusters = itscl;}
56
57 void SetOutwardFinding() {fInwardFlag=kFALSE;}
58 void SetInwardFinding() {fInwardFlag=kTRUE;}
59 void SetOuterStartLayer(Int_t osl = 0) {
665c0bc7 60 if(osl>(fNLayers-2)) AliWarning("Minimum Number of layers is 2. OuterStartLayer set to Nlayers-2");
61 fOuterStartLayer = TMath::Min(fNLayers-2,osl);
1d9af2d5 62 }
63 Int_t GetOuterStartLayer() const {return fOuterStartLayer;}
64 void SetInnerStartLayer(Int_t isl = 5) {
65 if(isl<1) AliWarning("Minimum Number of layers is 2. InnerStartLayer set to 1");
66 fInnerStartLayer = TMath::Max(1,isl);
67 }
68 Int_t GetInnerStartLayer() const {return fInnerStartLayer;}
69 void SetSAFlag(Bool_t fl){fITSStandAlone=fl;} // StandAlone flag setter
70 Bool_t GetSAFlag() const {return fITSStandAlone;} // StandAlone flag gett
71 void SetFixedWindowSizes(Int_t n=46, Double_t *phi=0, Double_t *lam=0);
72 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);
73 void UnloadClusters();
74 void SetMinNPoints(Int_t np){fMinNPoints=np;}
75 Int_t GetMinNPoints() const {return fMinNPoints;}
76 void SetMinimumChargeSDDSSD(Float_t minq=0.){fMinQ=minq;}
77 enum {kSAflag=0x8000}; //flag to mark clusters used in the SA tracker
78
665c0bc7 79 void SetNlayers(Int_t nlay) {fNLayers = nlay;}
4211bbc5 80
1d9af2d5 81 protected:
82
83 //Initialization
84 void Init();
85 void CreateLayers(Int_t iEvent);
86 void ResetForFinding();
4211bbc5 87 void ResetTrackToFollow(const AliITStrackU &t) {
88 fTrackToFollow.~AliITStrackU();
89 Bool_t trackMI = kTRUE;
90 new(&fTrackToFollow) AliITStrackU(t,trackMI);
91 }
92
93
1d9af2d5 94 void UpdatePoints();
95 Bool_t SetFirstPoint(Int_t lay, Int_t clu, Double_t* primaryVertex);
96 static Double_t Curvature(Double_t x1,Double_t y1,Double_t x2,Double_t y2,
4211bbc5 97 Double_t x3,Double_t y3);
1d9af2d5 98
99 Double_t ChoosePoint(Double_t p1, Double_t p2, Double_t pp);
100
101 static Int_t FindIntersection(Float_t a1, Float_t b1, Float_t c1, Float_t c2,
4211bbc5 102 Float_t& x1,Float_t& y1, Float_t& x2, Float_t& y2);
1d9af2d5 103 static Int_t FindEquation(Float_t x1, Float_t y1, Float_t x2, Float_t y2,
4211bbc5 104 Float_t x3, Float_t y3,Float_t& a, Float_t& b,
105 Float_t& c);
1d9af2d5 106
0a64515a 107 Int_t FindLabel(AliITStrackV2* track) const;
1d9af2d5 108
109 Int_t SearchClusters(Int_t layer,Double_t phiwindow,Double_t lambdawindow,
0b255a22 110 AliITStrackU* trs,Double_t zvertex,Int_t flagp);
1d9af2d5 111
0ac80088 112 void GetCoorAngles(AliITSRecPointU* cl,Double_t &phi,Double_t &lambda,Double_t &x,Double_t &y,Double_t &z,Double_t* vertex);
113 void GetCoorErrors(AliITSRecPointU* cl,Float_t &sx,Float_t &sy, Float_t &sz);
1d9af2d5 114 AliITSclusterTable* GetClusterCoord(Int_t layer,Int_t n) const {return (AliITSclusterTable*)fCluCoord[layer]->UncheckedAt(n);}
115 void RemoveClusterCoord(Int_t layer, Int_t n) {fCluCoord[layer]->RemoveAt(n);fCluCoord[layer]->Compress();}
4211bbc5 116 Bool_t RefitAtBase(Double_t x, AliITStrackU *track,
117 const Int_t *clusters);
0ac80088 118 Int_t UpdateMI(AliITStrackU* track, const AliITSRecPointU* cl,Double_t chi2,Int_t layer) const;
4211bbc5 119 Int_t CorrectForLayerMaterial(AliITStrackU *t, Int_t layerindex, Double_t oldGlobXYZ[3], TString direction="inward");
0ac80088 120 Double_t GetPredictedChi2MI(AliITStrackU* track, const AliITSRecPointU *cluster,Int_t layer);
121 static Int_t GetError(Int_t layer,const AliITSRecPointU *cl,
1d9af2d5 122 Float_t tgl,Float_t tgphitr,Float_t expQ,
123 Float_t &erry,Float_t &errz,Float_t &covyz,
124 Bool_t addMisalErr=kTRUE);
125
0ac80088 126 static Int_t GetErrorOrigRecPoint(const AliITSRecPointU*cl,
1d9af2d5 127 Float_t &erry,Float_t &errz,Float_t &covyz);
0ac80088 128 static void GetNTeor(Int_t layer,const AliITSRecPointU* cl,
1d9af2d5 129 Float_t tgl,Float_t tgphitr,
130 Float_t &ny,Float_t &nz);
0b255a22 131 static const Int_t fgMaxNLayer = 8; //max number of layers in ITSUpgrade
665c0bc7 132 Int_t fNLayers;//number of layer in ITSUpgrade
1d9af2d5 133 Double_t fPhiEstimate; //Estimation of phi angle on next layer
134 Bool_t fITSStandAlone; //Tracking is performed in the ITS alone if kTRUE
135 Float_t fPoint1[2]; //! coord. of 1-st point to evaluate the curvature
136 Float_t fPoint2[2]; //! coord. of 2-nd point to evaluate the curvature
137 Float_t fPoint3[2]; //! coord. of 3-rd point to evaluate the curvature
138 Float_t fPointc[2]; //! current point coord (for curvature eval.)
139 Double_t fLambdac; //! current value of the Lambda angle in the window
140 Double_t fPhic; //! current value of the Phi angle in the window
141 Float_t fCoef1; //! param. of the equation of the circ. approx a layer
142 Float_t fCoef2; //! param. of the equation of the circ. approx a layer
143 Float_t fCoef3; //! param. of the equation of the circ. approx a layer
144 Int_t fNloop; // Number of iterqations on phi and lambda windows
145 Double_t *fPhiWin; // phi window sizes
146 Double_t *fLambdaWin; // lambda window sizes
147 AliESDVertex *fVert; //! primary vertex
148 AliITSVertexer *fVertexer; //! vertexer
149 TClonesArray *fListOfTracks; //! container for found tracks
0b255a22 150 TClonesArray *fListOfUTracks; //! container for found SA tracks
1d9af2d5 151 TTree *fITSclusters; //! pointer to ITS tree of clusters
152 Bool_t fInwardFlag; // set to kTRUE for inward track finding
153 Int_t fOuterStartLayer; // Outward search for tracks with <6 points: outer layer to start from
154 Int_t fInnerStartLayer; // Inward search for tracks with <6 points: inner layer to start from
155 Int_t fMinNPoints; // minimum number of clusters for a track
156 Float_t fMinQ; // lower cut on cluster charge (SDD and SSD)
4211bbc5 157 AliITStrackU fTrackToFollow;
158
1d9af2d5 159 AliITSlayerUpgrade** fLayers;
db688ae2 160 AliITSsegmentationUpgrade *fSegmentation;
1d9af2d5 161
162 TClonesArray** fCluLayer; //! array with clusters
163 TClonesArray** fCluCoord; //! array with cluster info
164
db688ae2 165 ClassDef(AliITStrackerUpgrade,2)
4211bbc5 166 };
1d9af2d5 167
168#endif
169
170