1 #ifndef ALIITSTRACKERV2_H
2 #define ALIITSTRACKERV2_H
3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
6 //-------------------------------------------------------------------------
8 // reads AliITSclusterV2 clusters and creates AliITStrackV2 tracks
9 // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
10 //-------------------------------------------------------------------------
12 #include <TObjArray.h>
14 #include "AliTracker.h"
15 #include "AliITSrecoV2.h"
16 #include "AliITStrackV2.h"
18 class AliITSclusterV2;
24 //-------------------------------------------------------------------------
25 class AliITStrackerV2 : public AliTracker {
27 AliITStrackerV2():AliTracker(){}
28 AliITStrackerV2(const AliITSgeom *geom);
29 AliCluster *GetCluster(Int_t index) const;
30 AliITSclusterV2 *GetClusterLayer(Int_t layn, Int_t ncl) const
31 {return fgLayers[layn].GetCluster(ncl);}
32 Int_t GetNumberOfClustersLayer(Int_t layn) const
33 {return fgLayers[layn].GetNumberOfClusters();}
34 Int_t LoadClusters(TTree *cf);
35 void UnloadClusters();
36 Int_t Clusters2Tracks(TTree *in, TTree *out);
37 Int_t Clusters2Tracks(AliESD *event);
38 Int_t PropagateBack(AliESD *event);
39 Int_t RefitInward(AliESD *event);
40 Bool_t RefitAt(Double_t x, AliITStrackV2 *seed, const AliITStrackV2 *t);
41 void SetupFirstPass(Int_t *flags, Double_t *cuts=0);
42 void SetupSecondPass(Int_t *flags, Double_t *cuts=0);
44 void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;}
45 void SetLayersNotToSkip(Int_t *l);
47 void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
49 class AliITSdetector {
52 AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi;}
53 Double_t GetR() const {return fR;}
54 Double_t GetPhi() const {return fPhi;}
56 Double_t fR; // polar coordinates
57 Double_t fPhi; // of this detector
63 AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
65 Int_t InsertCluster(AliITSclusterV2 *c);
67 void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
68 const AliITSclusterV2 *GetNextCluster(Int_t &ci);
70 Double_t GetRoad() const {return fRoad;}
71 Double_t GetR() const {return fR;}
72 AliITSclusterV2 *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;}
73 AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
74 Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
75 Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
76 Int_t InRoad() const ;
77 Int_t GetNumberOfClusters() const {return fN;}
78 Int_t GetNladders() const {return fNladders;}
79 Int_t GetNdetectors() const {return fNdetectors;}
81 Double_t fR; // mean radius of this layer
82 Double_t fPhiOffset; // offset of the first detector in Phi
83 Int_t fNladders; // number of ladders
84 Double_t fZOffset; // offset of the first detector in Z
85 Int_t fNdetectors; // detectors/ladder
86 AliITSdetector *fDetectors; // array of detectors
87 Int_t fN; // number of clusters
88 AliITSclusterV2 *fClusters[kMaxClusterPerLayer]; // pointers to clusters
89 Double_t fZmax; // edges
90 Double_t fYmin; // of the
91 Double_t fYmax; // "window"
92 Int_t fI; // index of the current cluster within the "window"
93 Double_t fRoad; // road defined by the cluster density
94 Int_t FindClusterIndex(Double_t z) const;
98 void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
99 Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
100 void FollowProlongation();
101 Int_t TakeNextProlongation();
102 void ResetBestTrack() {
103 fBestTrack.~AliITStrackV2();
104 new(&fBestTrack) AliITStrackV2(fTrackToFollow);
106 void ResetTrackToFollow(const AliITStrackV2 &t) {
107 fTrackToFollow.~AliITStrackV2();
108 new(&fTrackToFollow) AliITStrackV2(t);
110 void AddTrackHypothesys(AliITStrackV2 * track, Int_t esdindex);
111 void CompressTrackHypothesys(Int_t esdindex, Int_t maxsize);
112 AliITStrackV2 * GetBestHypothesys(Int_t esdindex, AliITStrackV2 * original);
113 Int_t fI; // index of the current layer
114 static AliITSlayer fgLayers[kMaxLayer];// ITS layers
115 AliITStrackV2 fTracks[kMaxLayer]; // track estimations at the ITS layers
116 AliITStrackV2 fBestTrack; // "best" track
117 AliITStrackV2 fTrackToFollow; // followed track
118 TObjArray fTrackHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
119 Int_t fCurrentEsdTrack; // ! current esd track - MI
120 Int_t fPass; // current pass through the data
121 Int_t fConstraint[2]; // constraint flags
123 Int_t fLayersNotToSkip[kMaxLayer]; // layer masks
124 Int_t fLastLayerToTrackTo; // the innermost layer to track to
126 ClassDef(AliITStrackerV2,1) //ITS tracker V2
130 inline void AliITStrackerV2::SetupFirstPass(Int_t *flags, Double_t *cuts) {
131 // This function sets up flags and cuts for the first tracking pass
133 // flags[0] - vertex constaint flag
134 // negative means "skip the pass"
135 // 0 means "no constraint"
136 // positive means "normal constraint"
138 fConstraint[0]=flags[0];
142 inline void AliITStrackerV2::SetupSecondPass(Int_t *flags, Double_t *cuts) {
143 // This function sets up flags and cuts for the second tracking pass
145 // flags[0] - vertex constaint flag
146 // negative means "skip the pass"
147 // 0 means "no constraint"
148 // positive means "normal constraint"
150 fConstraint[1]=flags[0];
154 inline void AliITStrackerV2::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
155 //--------------------------------------------------------------------
156 //This function "cooks" a track label. If label<0, this track is fake.
157 //--------------------------------------------------------------------
158 Int_t tpcLabel=t->GetLabel();
159 if (tpcLabel<0) return;
160 AliTracker::CookLabel(t,wrong);
161 if (tpcLabel != t->GetLabel()) t->SetLabel(-tpcLabel);