Removing obsolete class AliITSGeant3Geometry - Test beam simulation classes back...
[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
39 void SetGeometry(AliITSgeom* geo) {fGeometry = geo;}
40
41 void Reconstruct(TTree* tree, Float_t* vtx, Float_t* vtxRes);
42
43 void SetPhiWindow(Float_t w=0.08) {fPhiWindow=w;}
3ef75756 44 void SetZetaWindow(Float_t w=1.) {fZetaWindow=w;}
45 void SetOnlyOneTrackletPerC2(Bool_t b = kFALSE) {fOnlyOneTrackletPerC2 = b;}
ac903f1b 46
47 Int_t GetNClustersLayer1() const {return fNClustersLay1;}
48 Int_t GetNClustersLayer2() const {return fNClustersLay2;}
49 Int_t GetNTracklets() const {return fNTracklets;}
50
51 Float_t* GetClusterLayer1(Int_t n) {return fClustersLay1[n];}
52 Float_t* GetClusterLayer2(Int_t n) {return fClustersLay2[n];}
53 Float_t* GetTracklet(Int_t n) {return fTracklets[n];}
54
55 void SetHistOn(Bool_t b=kFALSE) {fHistOn=b;}
56 void SaveHists();
3ef75756 57
ac903f1b 58protected:
3ef75756 59 AliITSMultReconstructor(const AliITSMultReconstructor& mr);
60 AliITSMultReconstructor& operator=(const AliITSMultReconstructor& /* mr */);
ac903f1b 61
62 AliITSgeom* fGeometry; // ITS geometry
63
64 Float_t** fClustersLay1; // clusters in the 1st layer of ITS
65 Float_t** fClustersLay2; // clusters in the 2nd layer of ITS
66 Float_t** fTracklets; // tracklets
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
72
73 Float_t fPhiWindow; // Search window in phi
74 Float_t fZetaWindow; // SEarch window in eta
75
3ef75756 76 Bool_t fOnlyOneTrackletPerC2; // only one tracklet per cluster in L. 2
ac903f1b 77
3ef75756 78 Bool_t fHistOn; // Option to define and fill the histograms
ddced3c8 79
3ef75756 80
81 TH1F* fhClustersDPhiAcc; // Phi2 - Phi1 for tracklets
82 TH1F* fhClustersDThetaAcc; // Theta2 - Theta1 for tracklets
83 TH1F* fhClustersDZetaAcc; // z2 - z1projected for tracklets
84 TH1F* fhClustersDPhiAll; // Phi2 - Phi1 all the combinations
85 TH1F* fhClustersDThetaAll; // Theta2 - Theta1 all the combinations
86 TH1F* fhClustersDZetaAll; // z2 - z1projected all the combinations
87
88 TH2F* fhDPhiVsDThetaAll; // 2D plot for all the combinations
89 TH2F* fhDPhiVsDThetaAcc; // same plot for tracklets
90 TH2F* fhDPhiVsDZetaAll; // 2d plot for all the combination
91 TH2F* fhDPhiVsDZetaAcc; // same plot for tracklets
92
93 TH1F* fhetaTracklets; // Pseudorapidity distr. for tracklets
94 TH1F* fhphiTracklets; // Azimuthal (Phi) distr. for tracklets
95 TH1F* fhetaClustersLay1; // Pseudorapidity distr. for Clusters L. 1
96 TH1F* fhphiClustersLay1; // Azimuthal (Phi) distr. for Clusters L. 1
97
ac903f1b 98
99 void LoadClusterArrays(TTree* tree);
100
3ef75756 101 ClassDef(AliITSMultReconstructor,1)
ac903f1b 102};
103
104#endif