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 //-------------------------------------------------------------------------
11 #include "AliTracker.h"
12 #include "AliITSrecoV2.h"
13 #include "AliITStrackV2.h"
15 class AliITSclusterV2;
21 //-------------------------------------------------------------------------
22 class AliITStrackerV2 : public AliTracker {
24 AliITStrackerV2():AliTracker(){}
25 AliITStrackerV2(const AliITSgeom *geom);
26 AliCluster *GetCluster(Int_t index) const;
27 AliITSclusterV2 *GetClusterLayer(Int_t layn, Int_t ncl) const
28 {return fgLayers[layn].GetCluster(ncl);}
29 Int_t GetNumberOfClustersLayer(Int_t layn) const
30 {return fgLayers[layn].GetNumberOfClusters();}
31 Int_t LoadClusters(TTree *cf);
32 void UnloadClusters();
33 Int_t Clusters2Tracks(TTree *in, TTree *out);
34 Int_t Clusters2Tracks(AliESD *event);
35 Int_t PropagateBack(AliESD *event);
36 Int_t RefitInward(AliESD *event);
37 Bool_t RefitAt(Double_t x, AliITStrackV2 *seed, const AliITStrackV2 *t);
38 void SetupFirstPass(Int_t *flags, Double_t *cuts=0);
39 void SetupSecondPass(Int_t *flags, Double_t *cuts=0);
41 void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;}
42 void SetLayersNotToSkip(Int_t *l);
44 void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
46 class AliITSdetector {
49 AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi;}
50 Double_t GetR() const {return fR;}
51 Double_t GetPhi() const {return fPhi;}
53 Double_t fR; // polar coordinates
54 Double_t fPhi; // of this detector
60 AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
62 Int_t InsertCluster(AliITSclusterV2 *c);
64 void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
65 const AliITSclusterV2 *GetNextCluster(Int_t &ci);
67 Double_t GetRoad() const {return fRoad;}
68 Double_t GetR() const {return fR;}
69 AliITSclusterV2 *GetCluster(Int_t i) const {return i<fN? fClusters[i]:0;}
70 AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
71 Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
72 Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
73 Int_t InRoad() const ;
74 Int_t GetNumberOfClusters() const {return fN;}
75 Int_t GetNladders() const {return fNladders;}
76 Int_t GetNdetectors() const {return fNdetectors;}
78 Double_t fR; // mean radius of this layer
79 Double_t fPhiOffset; // offset of the first detector in Phi
80 Int_t fNladders; // number of ladders
81 Double_t fZOffset; // offset of the first detector in Z
82 Int_t fNdetectors; // detectors/ladder
83 AliITSdetector *fDetectors; // array of detectors
84 Int_t fN; // number of clusters
85 AliITSclusterV2 *fClusters[kMaxClusterPerLayer]; // pointers to clusters
86 Double_t fZmax; // edges
87 Double_t fYmin; // of the
88 Double_t fYmax; // "window"
89 Int_t fI; // index of the current cluster within the "window"
90 Double_t fRoad; // road defined by the cluster density
91 Int_t FindClusterIndex(Double_t z) const;
95 void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
96 Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
97 void FollowProlongation();
98 Int_t TakeNextProlongation();
99 void ResetBestTrack() {
100 fBestTrack.~AliITStrackV2();
101 new(&fBestTrack) AliITStrackV2(fTrackToFollow);
103 void ResetTrackToFollow(const AliITStrackV2 &t) {
104 fTrackToFollow.~AliITStrackV2();
105 new(&fTrackToFollow) AliITStrackV2(t);
107 void AddTrackHypothesys(AliITStrackV2 * track, Int_t esdindex);
108 void CompressTrackHypothesys(Int_t esdindex, Int_t maxsize);
109 AliITStrackV2 * GetBestHypothesys(Int_t esdindex, AliITStrackV2 * original);
110 Int_t fI; // index of the current layer
111 static AliITSlayer fgLayers[kMaxLayer];// ITS layers
112 AliITStrackV2 fTracks[kMaxLayer]; // track estimations at the ITS layers
113 AliITStrackV2 fBestTrack; // "best" track
114 AliITStrackV2 fTrackToFollow; // followed track
115 TObjArray fTrackHypothesys; // ! array with track hypothesys- ARRAY is the owner of tracks- MI
116 Int_t fCurrentEsdTrack; // ! current esd track - MI
117 Int_t fPass; // current pass through the data
118 Int_t fConstraint[2]; // constraint flags
120 Int_t fLayersNotToSkip[kMaxLayer]; // layer masks
121 Int_t fLastLayerToTrackTo; // the innermost layer to track to
123 ClassDef(AliITStrackerV2,1) //ITS tracker V2
127 inline void AliITStrackerV2::SetupFirstPass(Int_t *flags, Double_t *cuts) {
128 // This function sets up flags and cuts for the first tracking pass
130 // flags[0] - vertex constaint flag
131 // negative means "skip the pass"
132 // 0 means "no constraint"
133 // positive means "normal constraint"
135 fConstraint[0]=flags[0];
139 inline void AliITStrackerV2::SetupSecondPass(Int_t *flags, Double_t *cuts) {
140 // This function sets up flags and cuts for the second tracking pass
142 // flags[0] - vertex constaint flag
143 // negative means "skip the pass"
144 // 0 means "no constraint"
145 // positive means "normal constraint"
147 fConstraint[1]=flags[0];
151 inline void AliITStrackerV2::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
152 //--------------------------------------------------------------------
153 //This function "cooks" a track label. If label<0, this track is fake.
154 //--------------------------------------------------------------------
155 Int_t tpcLabel=t->GetLabel();
156 if (tpcLabel<0) return;
157 AliTracker::CookLabel(t,wrong);
158 if (tpcLabel != t->GetLabel()) t->SetLabel(-tpcLabel);