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18856a77 | 1 | #ifndef ALIITSTRACKERV2_H |
2 | #define ALIITSTRACKERV2_H | |
006b5f7f | 3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | //------------------------------------------------------------------------- | |
7 | // ITS tracker | |
18856a77 | 8 | // reads AliITSclusterV2 clusters and creates AliITStrackV2 tracks |
9 | // Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch | |
006b5f7f | 10 | //------------------------------------------------------------------------- |
11 | #include "AliTracker.h" | |
12 | #include "AliITSrecoV2.h" | |
13 | #include "AliITStrackV2.h" | |
14 | ||
15 | class AliITSclusterV2; | |
c630aafd | 16 | class AliESD; |
006b5f7f | 17 | class AliITSgeom; |
c630aafd | 18 | class TTree; |
006b5f7f | 19 | |
20 | ||
21 | //------------------------------------------------------------------------- | |
22 | class AliITStrackerV2 : public AliTracker { | |
23 | public: | |
24 | AliITStrackerV2():AliTracker(){} | |
c630aafd | 25 | AliITStrackerV2(const AliITSgeom *geom); |
c219fd63 | 26 | ~AliITStrackerV2(){} |
006b5f7f | 27 | AliCluster *GetCluster(Int_t index) const; |
c219fd63 | 28 | AliITSclusterV2 *GetCluster(Int_t l, Int_t c) const { |
29 | return fgLayers[l].GetCluster(c); | |
30 | } | |
31 | Int_t GetNumberOfClustersLayer(Int_t n) const { | |
32 | return fgLayers[n].GetNumberOfClusters(); | |
33 | } | |
c630aafd | 34 | Int_t LoadClusters(TTree *cf); |
61ab8ea8 | 35 | void UnloadClusters(); |
c630aafd | 36 | Int_t Clusters2Tracks(AliESD *event); |
c630aafd | 37 | Int_t PropagateBack(AliESD *event); |
c630aafd | 38 | Int_t RefitInward(AliESD *event); |
39 | Bool_t RefitAt(Double_t x, AliITStrackV2 *seed, const AliITStrackV2 *t); | |
7f6ddf58 | 40 | void SetupFirstPass(Int_t *flags, Double_t *cuts=0); |
41 | void SetupSecondPass(Int_t *flags, Double_t *cuts=0); | |
42 | ||
c0dd5278 | 43 | void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;} |
44 | void SetLayersNotToSkip(Int_t *l); | |
45 | ||
b87bd7cd | 46 | void UseClusters(const AliKalmanTrack *t, Int_t from=0) const; |
47 | ||
15dd636f | 48 | class AliITSdetector { |
7f6ddf58 | 49 | public: |
50 | AliITSdetector(){} | |
51 | AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi;} | |
7f6ddf58 | 52 | Double_t GetR() const {return fR;} |
53 | Double_t GetPhi() const {return fPhi;} | |
54 | private: | |
55 | Double_t fR; // polar coordinates | |
56 | Double_t fPhi; // of this detector | |
57 | }; | |
58 | ||
59 | class AliITSlayer { | |
60 | public: | |
c219fd63 | 61 | enum {kNsector=5, kMaxClusterPerSector=kMaxClusterPerLayer/kNsector}; |
7f6ddf58 | 62 | AliITSlayer(); |
63 | AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd); | |
64 | ~AliITSlayer(); | |
65 | Int_t InsertCluster(AliITSclusterV2 *c); | |
61ab8ea8 | 66 | void ResetClusters(); |
c219fd63 | 67 | Int_t SelectClusters(Float_t zmi, Float_t zma, Float_t ymi, Float_t yma); |
7f6ddf58 | 68 | const AliITSclusterV2 *GetNextCluster(Int_t &ci); |
b87bd7cd | 69 | void ResetRoad(); |
70 | Double_t GetRoad() const {return fRoad;} | |
7f6ddf58 | 71 | Double_t GetR() const {return fR;} |
c219fd63 | 72 | AliITSclusterV2 *GetCluster(Int_t i) const { return fClusters[i]; } |
7f6ddf58 | 73 | AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; } |
74 | Int_t FindDetectorIndex(Double_t phi, Double_t z) const; | |
61ab8ea8 | 75 | Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const; |
61ab8ea8 | 76 | Int_t GetNladders() const {return fNladders;} |
77 | Int_t GetNdetectors() const {return fNdetectors;} | |
c219fd63 | 78 | Int_t GetNumberOfClusters() const; |
235b705f | 79 | protected: |
7f6ddf58 | 80 | Double_t fR; // mean radius of this layer |
81 | Double_t fPhiOffset; // offset of the first detector in Phi | |
82 | Int_t fNladders; // number of ladders | |
83 | Double_t fZOffset; // offset of the first detector in Z | |
84 | Int_t fNdetectors; // detectors/ladder | |
85 | AliITSdetector *fDetectors; // array of detectors | |
c219fd63 | 86 | |
7f6ddf58 | 87 | AliITSclusterV2 *fClusters[kMaxClusterPerLayer]; // pointers to clusters |
c219fd63 | 88 | Int_t fN[kNsector]; // numbers of clusters sector by sector |
89 | ||
90 | Int_t fIndex[kMaxClusterPerLayer]; // indexes of selected clusters | |
91 | Int_t fNsel; // number of selected clusters | |
92 | ||
93 | Double_t fRoad; // road defined by the cluster density | |
94 | Int_t FindClusterIndex(Float_t z, Int_t s) const; | |
7f6ddf58 | 95 | }; |
15dd636f | 96 | |
235b705f | 97 | protected: |
7f6ddf58 | 98 | void CookLabel(AliKalmanTrack *t,Float_t wrong) const; |
a9a2d814 | 99 | Double_t GetEffectiveThickness(Double_t y, Double_t z) const; |
006b5f7f | 100 | void FollowProlongation(); |
101 | Int_t TakeNextProlongation(); | |
006b5f7f | 102 | void ResetBestTrack() { |
103 | fBestTrack.~AliITStrackV2(); | |
104 | new(&fBestTrack) AliITStrackV2(fTrackToFollow); | |
105 | } | |
006b5f7f | 106 | void ResetTrackToFollow(const AliITStrackV2 &t) { |
107 | fTrackToFollow.~AliITStrackV2(); | |
108 | new(&fTrackToFollow) AliITStrackV2(t); | |
109 | } | |
7f6ddf58 | 110 | Int_t fI; // index of the current layer |
18856a77 | 111 | static AliITSlayer fgLayers[kMaxLayer];// ITS layers |
7f6ddf58 | 112 | AliITStrackV2 fTracks[kMaxLayer]; // track estimations at the ITS layers |
113 | AliITStrackV2 fBestTrack; // "best" track | |
114 | AliITStrackV2 fTrackToFollow; // followed track | |
115 | Int_t fPass; // current pass through the data | |
116 | Int_t fConstraint[2]; // constraint flags | |
8676d691 | 117 | |
c0dd5278 | 118 | Int_t fLayersNotToSkip[kMaxLayer]; // layer masks |
119 | Int_t fLastLayerToTrackTo; // the innermost layer to track to | |
15dd636f | 120 | |
c630aafd | 121 | ClassDef(AliITStrackerV2,1) //ITS tracker V2 |
006b5f7f | 122 | }; |
123 | ||
124 | ||
7f6ddf58 | 125 | inline void AliITStrackerV2::SetupFirstPass(Int_t *flags, Double_t *cuts) { |
126 | // This function sets up flags and cuts for the first tracking pass | |
127 | // | |
128 | // flags[0] - vertex constaint flag | |
129 | // negative means "skip the pass" | |
130 | // 0 means "no constraint" | |
131 | // positive means "normal constraint" | |
132 | ||
133 | fConstraint[0]=flags[0]; | |
134 | if (cuts==0) return; | |
135 | } | |
136 | ||
137 | inline void AliITStrackerV2::SetupSecondPass(Int_t *flags, Double_t *cuts) { | |
138 | // This function sets up flags and cuts for the second tracking pass | |
139 | // | |
140 | // flags[0] - vertex constaint flag | |
141 | // negative means "skip the pass" | |
142 | // 0 means "no constraint" | |
143 | // positive means "normal constraint" | |
144 | ||
145 | fConstraint[1]=flags[0]; | |
146 | if (cuts==0) return; | |
147 | } | |
148 | ||
149 | inline void AliITStrackerV2::CookLabel(AliKalmanTrack *t,Float_t wrong) const { | |
150 | //-------------------------------------------------------------------- | |
151 | //This function "cooks" a track label. If label<0, this track is fake. | |
152 | //-------------------------------------------------------------------- | |
153 | Int_t tpcLabel=t->GetLabel(); | |
154 | if (tpcLabel<0) return; | |
155 | AliTracker::CookLabel(t,wrong); | |
15dd636f | 156 | if (tpcLabel != t->GetLabel()) t->SetLabel(-tpcLabel); |
7f6ddf58 | 157 | } |
006b5f7f | 158 | |
159 | #endif |