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 "AliVVvertex.h"
14 #include "AliESDVertex.h"
16 class AliFlatESDVertex: public AliVVvertex
19 Double32_t fPosition[3]; // vertex position
20 Double32_t fCov[6]; // vertex covariance matrix
21 Int_t fNContributors; // # of tracklets/tracks used for the estimate
22 Double32_t fChi2; // chi2 of vertex fit
24 Double32_t fSigma; // track dispersion around found vertex
25 Char_t fID; // ID of this vertex within an ESD event
26 Char_t fBCID; // BC ID assigned to vertex
29 AliFlatESDVertex() :fNContributors(0), fChi2(0){
30 for( int i=0; i<3; i++) fPosition[i] = -9999;
31 for( int i=0; i<6; i++) fCov[i] = -9999;
34 void Set(const AliESDVertex &v );
36 Double32_t GetX() const { return fPosition[0]; }
37 Double32_t GetY() const { return fPosition[1]; }
38 Double32_t GetZ() const { return fPosition[2]; }
40 void GetXYZ(Double_t pos[3]) const { for(Int_t j=0; j<3; j++) pos[j]=fPosition[j]; }
41 void SetXYZ(Double_t pos[3]) { for(Int_t j=0; j<3; j++) fPosition[j]=pos[j]; }
43 void SetX(Double_t xVert) {fPosition[0]=xVert; }
44 void SetY(Double_t yVert) {fPosition[1]=yVert; }
45 void SetZ(Double_t zVert) {fPosition[2]=zVert; }
46 void SetNContributors(Int_t nContr) {fNContributors=nContr; }
49 Int_t GetNContributors() const { return fNContributors; }
52 void GetCovarianceMatrix(Double_t covmatrix[6]) const;
53 void SetCovarianceMatrix(const Double_t *) {}
55 Double_t GetChi2perNDF() const {return -999.;}
56 Double_t GetChi2() const {return -999.;}
57 void SetChi2(Double_t ) {}
58 Int_t GetNDF() const {return -999;}
60 void GetSigmaXYZ(Double_t sigma[3]) const;
61 void GetCovMatrix(Double_t covmatrix[6]) const;
62 void GetCovarianceMatrix(Double_t covmatrix[6]) const
63 {GetCovMatrix(covmatrix);}
64 void GetSNR(Double_t snr[3]) const;
65 void SetCovarianceMatrix(const Double_t *cov);
67 Double_t GetXRes() const {return TMath::Sqrt(fCovXX);}
68 Double_t GetYRes() const {return TMath::Sqrt(fCovYY);}
69 Double_t GetZRes() const {return TMath::Sqrt(fCovZZ);}
70 Double_t GetXSNR() const { return fSNR[0]; }
71 Double_t GetYSNR() const { return fSNR[1]; }
72 Double_t GetZSNR() const { return fSNR[2]; }
73 void SetSNR(double snr, int i) {if (i<3 && i>=0) fSNR[i] = snr;}
75 Double_t GetChi2() const { return fChi2; }
76 void SetChi2(Double_t chi) { fChi2 = chi; }
77 Double_t GetChi2toNDF() const
78 { return fChi2/(2.*(Double_t)fNContributors-3.); }
79 Double_t GetChi2perNDF() const { return GetChi2toNDF();}
80 Int_t GetNDF() const {return (2*fNContributors-3);}
82 void Print(Option_t* option = "") const;
83 void PrintStatus() const {Print();}
85 void Reset() { SetToZero(); SetName("Vertex"); }
87 void SetID(Char_t id) {fID=id;}
88 Char_t GetID() const {return fID;}
90 Double_t GetWDist(const AliESDVertex* v) const;