1 #ifndef ALIFLATESDVERTEX_H
2 #define ALIFLATESDVERTEX_H
4 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
5 * See cxx source for full Copyright notice *
6 * Primary Authors : Sergey Gorbunov, Jochen Thaeder, Chiara Zampolli */
9 * >> Flat structure representing a ESD vertex <<
13 #include "AliESDVertex.h"
15 struct AliFlatESDVertex
18 Double32_t fPosition[3]; // vertex position
19 Double32_t fCov[6]; // vertex covariance matrix
20 Int_t fNContributors; // # of tracklets/tracks used for the estimate
21 Double32_t fChi2; // chi2 of vertex fit
23 Double32_t fSigma; // track dispersion around found vertex
24 Char_t fID; // ID of this vertex within an ESD event
25 Char_t fBCID; // BC ID assigned to vertex
28 AliFlatESDVertex() :fNContributors(0), fChi2(0){
29 for( int i=0; i<3; i++) fPosition[i] = -9999;
30 for( int i=0; i<6; i++) fCov[i] = -9999;
33 void Set(const AliESDVertex &v );
35 Double32_t GetX() const { return fPosition[0]; }
36 Double32_t GetY() const { return fPosition[1]; }
37 Double32_t GetZ() const { return fPosition[2]; }
39 void GetXYZ(Double_t pos[3]) const { for(Int_t j=0; j<3; j++) pos[j]=fPosition[j]; }
40 void SetXYZ(Double_t pos[3]) { for(Int_t j=0; j<3; j++) fPosition[j]=pos[j]; }
42 void SetX(Double_t xVert) {fPosition[0]=xVert; }
43 void SetY(Double_t yVert) {fPosition[1]=yVert; }
44 void SetZ(Double_t zVert) {fPosition[2]=zVert; }
45 void SetNContributors(Int_t nContr) {fNContributors=nContr; }
48 Int_t GetNContributors() const { return fNContributors; }
51 void GetCovarianceMatrix(Double_t covmatrix[6]) const;
52 void SetCovarianceMatrix(const Double_t *) {}
54 Double_t GetChi2perNDF() const {return -999.;}
55 Double_t GetChi2() const {return -999.;}
56 void SetChi2(Double_t ) {}
57 Int_t GetNDF() const {return -999;}
59 void GetSigmaXYZ(Double_t sigma[3]) const;
60 void GetCovMatrix(Double_t covmatrix[6]) const;
61 void GetCovarianceMatrix(Double_t covmatrix[6]) const
62 {GetCovMatrix(covmatrix);}
63 void GetSNR(Double_t snr[3]) const;
64 void SetCovarianceMatrix(const Double_t *cov);
66 Double_t GetXRes() const {return TMath::Sqrt(fCovXX);}
67 Double_t GetYRes() const {return TMath::Sqrt(fCovYY);}
68 Double_t GetZRes() const {return TMath::Sqrt(fCovZZ);}
69 Double_t GetXSNR() const { return fSNR[0]; }
70 Double_t GetYSNR() const { return fSNR[1]; }
71 Double_t GetZSNR() const { return fSNR[2]; }
72 void SetSNR(double snr, int i) {if (i<3 && i>=0) fSNR[i] = snr;}
74 Double_t GetChi2() const { return fChi2; }
75 void SetChi2(Double_t chi) { fChi2 = chi; }
76 Double_t GetChi2toNDF() const
77 { return fChi2/(2.*(Double_t)fNContributors-3.); }
78 Double_t GetChi2perNDF() const { return GetChi2toNDF();}
79 Int_t GetNDF() const {return (2*fNContributors-3);}
81 void Print(Option_t* option = "") const;
82 void PrintStatus() const {Print();}
84 void Reset() { SetToZero(); SetName("Vertex"); }
86 void SetID(Char_t id) {fID=id;}
87 Char_t GetID() const {return fID;}
89 Double_t GetWDist(const AliESDVertex* v) const;
96 void AliFlatESDVertex::Set(const AliESDVertex &v )
98 fPosition[0] = v.GetX();
99 fPosition[1] = v.GetY();
100 fPosition[2] = v.GetZ();
102 v.GetCovarianceMatrix( c );
103 for( int i=0; i<6; i++) fCov[i] = c[i];
104 fNContributors = v.GetNContributors();
108 typedef struct AliFlatESDVertex AliFlatESDVertex;