Coding conventions, additional comments, code clean-up (Yu.Belikov)
[u/mrichter/AliRoot.git] / ITS / AliITStrackerV2.h
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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
15class AliITSclusterV2;
c630aafd 16class AliESD;
006b5f7f 17class AliITSgeom;
c630aafd 18class TTree;
006b5f7f 19
20
21//-------------------------------------------------------------------------
22class AliITStrackerV2 : public AliTracker {
23public:
24 AliITStrackerV2():AliTracker(){}
c630aafd 25 AliITStrackerV2(const AliITSgeom *geom);
006b5f7f 26 AliCluster *GetCluster(Int_t index) const;
c630aafd 27 Int_t LoadClusters(TTree *cf);
61ab8ea8 28 void UnloadClusters();
c630aafd 29 Int_t Clusters2Tracks(TTree *in, TTree *out);
30 Int_t Clusters2Tracks(AliESD *event);
31 Int_t PropagateBack(TTree *in, TTree *out);
32 Int_t PropagateBack(AliESD *event);
33 Int_t RefitInward(TTree *in, TTree *out);
34 Int_t RefitInward(AliESD *event);
35 Bool_t RefitAt(Double_t x, AliITStrackV2 *seed, const AliITStrackV2 *t);
7f6ddf58 36 void SetupFirstPass(Int_t *flags, Double_t *cuts=0);
37 void SetupSecondPass(Int_t *flags, Double_t *cuts=0);
38
c0dd5278 39 void SetLastLayerToTrackTo(Int_t l=0) {fLastLayerToTrackTo=l;}
40 void SetLayersNotToSkip(Int_t *l);
41
b87bd7cd 42 void UseClusters(const AliKalmanTrack *t, Int_t from=0) const;
43
7f6ddf58 44 class AliITSdetector {
45 public:
46 AliITSdetector(){}
47 AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi;}
48 void *operator new(size_t s,AliITSdetector *p) {return p;}
49 Double_t GetR() const {return fR;}
50 Double_t GetPhi() const {return fPhi;}
51 private:
52 Double_t fR; // polar coordinates
53 Double_t fPhi; // of this detector
54 };
55
56 class AliITSlayer {
57 public:
58 AliITSlayer();
59 AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
60 ~AliITSlayer();
61 Int_t InsertCluster(AliITSclusterV2 *c);
61ab8ea8 62 void ResetClusters();
7f6ddf58 63 void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
64 const AliITSclusterV2 *GetNextCluster(Int_t &ci);
65 void *operator new(size_t s, AliITSlayer *p) {return p;}
b87bd7cd 66 void ResetRoad();
67 Double_t GetRoad() const {return fRoad;}
7f6ddf58 68 Double_t GetR() const {return fR;}
69 AliITSclusterV2 *GetCluster(Int_t i) const {return fClusters[i];}
70 AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
71 Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
61ab8ea8 72 Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
7f6ddf58 73 Int_t InRoad() const ;
74 Int_t GetNumberOfClusters() const {return fN;}
61ab8ea8 75 Int_t GetNladders() const {return fNladders;}
76 Int_t GetNdetectors() const {return fNdetectors;}
7f6ddf58 77 private:
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"
b87bd7cd 90 Double_t fRoad; // road defined by the cluster density
7f6ddf58 91 Int_t FindClusterIndex(Double_t z) const;
92 };
006b5f7f 93
94private:
7f6ddf58 95 void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
a9a2d814 96 Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
006b5f7f 97 void FollowProlongation();
98 Int_t TakeNextProlongation();
006b5f7f 99 void ResetBestTrack() {
100 fBestTrack.~AliITStrackV2();
101 new(&fBestTrack) AliITStrackV2(fTrackToFollow);
102 }
006b5f7f 103 void ResetTrackToFollow(const AliITStrackV2 &t) {
104 fTrackToFollow.~AliITStrackV2();
105 new(&fTrackToFollow) AliITStrackV2(t);
106 }
7f6ddf58 107 Int_t fI; // index of the current layer
18856a77 108 static AliITSlayer fgLayers[kMaxLayer];// ITS layers
7f6ddf58 109 AliITStrackV2 fTracks[kMaxLayer]; // track estimations at the ITS layers
110 AliITStrackV2 fBestTrack; // "best" track
111 AliITStrackV2 fTrackToFollow; // followed track
112 Int_t fPass; // current pass through the data
113 Int_t fConstraint[2]; // constraint flags
8676d691 114
c0dd5278 115 Int_t fLayersNotToSkip[kMaxLayer]; // layer masks
116 Int_t fLastLayerToTrackTo; // the innermost layer to track to
117
c630aafd 118 ClassDef(AliITStrackerV2,1) //ITS tracker V2
006b5f7f 119};
120
121
7f6ddf58 122inline void AliITStrackerV2::SetupFirstPass(Int_t *flags, Double_t *cuts) {
123 // This function sets up flags and cuts for the first tracking pass
124 //
125 // flags[0] - vertex constaint flag
126 // negative means "skip the pass"
127 // 0 means "no constraint"
128 // positive means "normal constraint"
129
130 fConstraint[0]=flags[0];
131 if (cuts==0) return;
132}
133
134inline void AliITStrackerV2::SetupSecondPass(Int_t *flags, Double_t *cuts) {
135 // This function sets up flags and cuts for the second tracking pass
136 //
137 // flags[0] - vertex constaint flag
138 // negative means "skip the pass"
139 // 0 means "no constraint"
140 // positive means "normal constraint"
141
142 fConstraint[1]=flags[0];
143 if (cuts==0) return;
144}
145
146inline void AliITStrackerV2::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
147 //--------------------------------------------------------------------
148 //This function "cooks" a track label. If label<0, this track is fake.
149 //--------------------------------------------------------------------
150 Int_t tpcLabel=t->GetLabel();
151 if (tpcLabel<0) return;
152 AliTracker::CookLabel(t,wrong);
153 if (tpcLabel != t->GetLabel()) t->SetLabel(-tpcLabel);
154}
006b5f7f 155
156#endif