Other overlaps removed (E. Cattaruzza and M. Sitta)
[u/mrichter/AliRoot.git] / ITS / AliITSMultReconstructor.h
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ac903f1b 1#ifndef ALIITSMULTRECONSTRUCTOR_H
2#define ALIITSMULTRECONSTRUCTOR_H
3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6/* $Id$ */
7
8/////////////////////////////////////////////////////////////////////////
9//
10// AliITSMultReconstructor - find clusters in the pixels (theta and
11// phi) and tracklets.
12//
13// These can be used to extract charged particles multiplcicity from the ITS.
14//
15// A tracklet consist of two ITS clusters, one in the first pixel
16// layer and one in the second. The clusters are associates if the
17// differencies in Phi (azimuth) and Zeta (longitudinal) are inside
18// a fiducial volume. In case of multiple candidates it is selected the
19// candidate with minimum distance in Phi.
20// The boolean fOnlyOneTrackletPerC2 allows to control if two clusters
21// in layer 2 can be associated to the same cluster in layer 1 or not.
22//
23/////////////////////////////////////////////////////////////////////////
24
25#include "TObject.h"
26
27class TTree;
28class TH1F;
3ef75756 29class TH2F;
30
ac903f1b 31class AliITSgeom;
32
33class AliITSMultReconstructor : public TObject
34{
35public:
36 AliITSMultReconstructor();
ddced3c8 37 virtual ~AliITSMultReconstructor();
ac903f1b 38
ac903f1b 39 void Reconstruct(TTree* tree, Float_t* vtx, Float_t* vtxRes);
40
41 void SetPhiWindow(Float_t w=0.08) {fPhiWindow=w;}
3ef75756 42 void SetZetaWindow(Float_t w=1.) {fZetaWindow=w;}
02a95988 43 void SetOnlyOneTrackletPerC2(Bool_t b = kTRUE) {fOnlyOneTrackletPerC2 = b;}
ac903f1b 44
45 Int_t GetNClustersLayer1() const {return fNClustersLay1;}
46 Int_t GetNClustersLayer2() const {return fNClustersLay2;}
47 Int_t GetNTracklets() const {return fNTracklets;}
968e8539 48 Int_t GetNSingleClusters() const {return fNSingleCluster;}
ac903f1b 49
50 Float_t* GetClusterLayer1(Int_t n) {return fClustersLay1[n];}
51 Float_t* GetClusterLayer2(Int_t n) {return fClustersLay2[n];}
52 Float_t* GetTracklet(Int_t n) {return fTracklets[n];}
968e8539 53 Float_t* GetCluster(Int_t n) {return fSClusters[n];}
ac903f1b 54
55 void SetHistOn(Bool_t b=kFALSE) {fHistOn=b;}
56 void SaveHists();
3ef75756 57
ac903f1b 58protected:
3ef75756 59 AliITSMultReconstructor(const AliITSMultReconstructor& mr);
7537d03c 60 AliITSMultReconstructor& operator=(const AliITSMultReconstructor& mr);
ac903f1b 61
ac903f1b 62
63 Float_t** fClustersLay1; // clusters in the 1st layer of ITS
64 Float_t** fClustersLay2; // clusters in the 2nd layer of ITS
65 Float_t** fTracklets; // tracklets
968e8539 66 Float_t** fSClusters; // single clusters (unassociated)
ac903f1b 67 Bool_t* fAssociationFlag; // flag for the associations
68
69 Int_t fNClustersLay1; // Number of clusters (Layer1)
70 Int_t fNClustersLay2; // Number of clusters (Layer2)
71 Int_t fNTracklets; // Number of tracklets
968e8539 72 Int_t fNSingleCluster; // Number of unassociated clusters
ac903f1b 73
74 Float_t fPhiWindow; // Search window in phi
75 Float_t fZetaWindow; // SEarch window in eta
76
3ef75756 77 Bool_t fOnlyOneTrackletPerC2; // only one tracklet per cluster in L. 2
ac903f1b 78
3ef75756 79 Bool_t fHistOn; // Option to define and fill the histograms
ddced3c8 80
3ef75756 81
82 TH1F* fhClustersDPhiAcc; // Phi2 - Phi1 for tracklets
83 TH1F* fhClustersDThetaAcc; // Theta2 - Theta1 for tracklets
84 TH1F* fhClustersDZetaAcc; // z2 - z1projected for tracklets
85 TH1F* fhClustersDPhiAll; // Phi2 - Phi1 all the combinations
86 TH1F* fhClustersDThetaAll; // Theta2 - Theta1 all the combinations
87 TH1F* fhClustersDZetaAll; // z2 - z1projected all the combinations
88
89 TH2F* fhDPhiVsDThetaAll; // 2D plot for all the combinations
90 TH2F* fhDPhiVsDThetaAcc; // same plot for tracklets
91 TH2F* fhDPhiVsDZetaAll; // 2d plot for all the combination
92 TH2F* fhDPhiVsDZetaAcc; // same plot for tracklets
93
94 TH1F* fhetaTracklets; // Pseudorapidity distr. for tracklets
95 TH1F* fhphiTracklets; // Azimuthal (Phi) distr. for tracklets
96 TH1F* fhetaClustersLay1; // Pseudorapidity distr. for Clusters L. 1
97 TH1F* fhphiClustersLay1; // Azimuthal (Phi) distr. for Clusters L. 1
98
ac903f1b 99
100 void LoadClusterArrays(TTree* tree);
101
f606f16a 102 ClassDef(AliITSMultReconstructor,3)
ac903f1b 103};
104
105#endif