P and N side clusters for SSD
[u/mrichter/AliRoot.git] / ITS / AliITStrackerV2.h
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006b5f7f 1#ifndef ALIITSTRACKER_H
2#define ALIITSTRACKER_H
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
8//
9// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch
10//-------------------------------------------------------------------------
11#include "AliTracker.h"
12#include "AliITSrecoV2.h"
13#include "AliITStrackV2.h"
14
15class AliITSclusterV2;
16class AliITSgeom;
17class TFile;
18
19
20//-------------------------------------------------------------------------
21class AliITStrackerV2 : public AliTracker {
22public:
23 AliITStrackerV2():AliTracker(){}
61ab8ea8 24 AliITStrackerV2(const AliITSgeom *geom);
006b5f7f 25 AliCluster *GetCluster(Int_t index) const;
61ab8ea8 26 void LoadClusters();
27 void UnloadClusters();
006b5f7f 28 Int_t Clusters2Tracks(const TFile *in, TFile *out);
14825d5a 29 Int_t PropagateBack(const TFile *in, TFile *out);
7f6ddf58 30 void SetupFirstPass(Int_t *flags, Double_t *cuts=0);
31 void SetupSecondPass(Int_t *flags, Double_t *cuts=0);
4ab260d6 32 Bool_t RefitAt(Double_t x, AliITStrackV2 *t, Int_t *index);
7f6ddf58 33
34 class AliITSdetector {
35 public:
36 AliITSdetector(){}
37 AliITSdetector(Double_t r,Double_t phi) {fR=r; fPhi=phi;}
38 void *operator new(size_t s,AliITSdetector *p) {return p;}
39 Double_t GetR() const {return fR;}
40 Double_t GetPhi() const {return fPhi;}
41 private:
42 Double_t fR; // polar coordinates
43 Double_t fPhi; // of this detector
44 };
45
46 class AliITSlayer {
47 public:
48 AliITSlayer();
49 AliITSlayer(Double_t r, Double_t p, Double_t z, Int_t nl, Int_t nd);
50 ~AliITSlayer();
51 Int_t InsertCluster(AliITSclusterV2 *c);
61ab8ea8 52 void ResetClusters();
7f6ddf58 53 void SelectClusters(Double_t zmi,Double_t zma,Double_t ymi,Double_t yma);
54 const AliITSclusterV2 *GetNextCluster(Int_t &ci);
55 void *operator new(size_t s, AliITSlayer *p) {return p;}
56 Double_t GetR() const {return fR;}
57 AliITSclusterV2 *GetCluster(Int_t i) const {return fClusters[i];}
58 AliITSdetector &GetDetector(Int_t n) const { return fDetectors[n]; }
59 Int_t FindDetectorIndex(Double_t phi, Double_t z) const;
61ab8ea8 60 Double_t GetThickness(Double_t y, Double_t z, Double_t &x0) const;
7f6ddf58 61 Int_t InRoad() const ;
62 Int_t GetNumberOfClusters() const {return fN;}
61ab8ea8 63 Int_t GetNladders() const {return fNladders;}
64 Int_t GetNdetectors() const {return fNdetectors;}
7f6ddf58 65 private:
66 Double_t fR; // mean radius of this layer
67 Double_t fPhiOffset; // offset of the first detector in Phi
68 Int_t fNladders; // number of ladders
69 Double_t fZOffset; // offset of the first detector in Z
70 Int_t fNdetectors; // detectors/ladder
71 AliITSdetector *fDetectors; // array of detectors
72 Int_t fN; // number of clusters
73 AliITSclusterV2 *fClusters[kMaxClusterPerLayer]; // pointers to clusters
74 Double_t fZmax; // edges
75 Double_t fYmin; // of the
76 Double_t fYmax; // "window"
77 Int_t fI; // index of the current cluster within the "window"
78 Int_t FindClusterIndex(Double_t z) const;
79 };
006b5f7f 80
81private:
7f6ddf58 82 void CookLabel(AliKalmanTrack *t,Float_t wrong) const;
a9a2d814 83 Double_t GetEffectiveThickness(Double_t y, Double_t z) const;
006b5f7f 84 void FollowProlongation();
85 Int_t TakeNextProlongation();
006b5f7f 86 void ResetBestTrack() {
87 fBestTrack.~AliITStrackV2();
88 new(&fBestTrack) AliITStrackV2(fTrackToFollow);
89 }
006b5f7f 90 void ResetTrackToFollow(const AliITStrackV2 &t) {
91 fTrackToFollow.~AliITStrackV2();
92 new(&fTrackToFollow) AliITStrackV2(t);
93 }
7f6ddf58 94 Int_t fI; // index of the current layer
006b5f7f 95 static AliITSlayer fLayers[kMaxLayer]; // ITS layers
7f6ddf58 96 AliITStrackV2 fTracks[kMaxLayer]; // track estimations at the ITS layers
97 AliITStrackV2 fBestTrack; // "best" track
98 AliITStrackV2 fTrackToFollow; // followed track
99 Int_t fPass; // current pass through the data
100 Int_t fConstraint[2]; // constraint flags
006b5f7f 101};
102
103
7f6ddf58 104inline void AliITStrackerV2::SetupFirstPass(Int_t *flags, Double_t *cuts) {
105 // This function sets up flags and cuts for the first tracking pass
106 //
107 // flags[0] - vertex constaint flag
108 // negative means "skip the pass"
109 // 0 means "no constraint"
110 // positive means "normal constraint"
111
112 fConstraint[0]=flags[0];
113 if (cuts==0) return;
114}
115
116inline void AliITStrackerV2::SetupSecondPass(Int_t *flags, Double_t *cuts) {
117 // This function sets up flags and cuts for the second tracking pass
118 //
119 // flags[0] - vertex constaint flag
120 // negative means "skip the pass"
121 // 0 means "no constraint"
122 // positive means "normal constraint"
123
124 fConstraint[1]=flags[0];
125 if (cuts==0) return;
126}
127
128inline void AliITStrackerV2::CookLabel(AliKalmanTrack *t,Float_t wrong) const {
129 //--------------------------------------------------------------------
130 //This function "cooks" a track label. If label<0, this track is fake.
131 //--------------------------------------------------------------------
132 Int_t tpcLabel=t->GetLabel();
133 if (tpcLabel<0) return;
134 AliTracker::CookLabel(t,wrong);
135 if (tpcLabel != t->GetLabel()) t->SetLabel(-tpcLabel);
136}
006b5f7f 137
138#endif