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 "AliVVMisc.h"
14 #include "AliESDVertex.h"
16 struct AliFlatESDVertex
18 // -- Constructor / Destructors
21 ~AliFlatESDVertex() {}
23 // constructor and method for reinitialisation of virtual table
24 AliFlatESDVertex( AliVVConstructorReinitialisationFlag );
25 void Reinitialize() const {} // no virtual table - do nothing
29 Double32_t fPosition[3]; // vertex position
30 Double32_t fCov[6]; // vertex covariance matrix
31 Int_t fNContributors; // # of tracklets/tracks used for the estimate
32 Double32_t fChi2; // chi2 of vertex fit
34 Double32_t fSigma; // track dispersion around found vertex
35 Char_t fID; // ID of this vertex within an ESD event
36 Char_t fBCID; // BC ID assigned to vertex
40 void Set(const AliESDVertex &v );
42 Double32_t GetX() const { return fPosition[0]; }
43 Double32_t GetY() const { return fPosition[1]; }
44 Double32_t GetZ() const { return fPosition[2]; }
46 void GetXYZ(Double_t pos[3]) const { for(Int_t j=0; j<3; j++) pos[j]=fPosition[j]; }
47 void SetXYZ(Double_t pos[3]) { for(Int_t j=0; j<3; j++) fPosition[j]=pos[j]; }
49 void SetX(Double_t xVert) {fPosition[0]=xVert; }
50 void SetY(Double_t yVert) {fPosition[1]=yVert; }
51 void SetZ(Double_t zVert) {fPosition[2]=zVert; }
52 void SetNContributors(Int_t nContr) {fNContributors=nContr; }
55 Int_t GetNContributors() const { return fNContributors; }
58 void GetCovarianceMatrix(Double_t covmatrix[6]) const;
59 void SetCovarianceMatrix(const Double_t *) {}
61 Double_t GetChi2perNDF() const {return -999.;}
62 Double_t GetChi2() const {return -999.;}
63 void SetChi2(Double_t ) {}
64 Int_t GetNDF() const {return -999;}
66 void GetSigmaXYZ(Double_t sigma[3]) const;
67 void GetCovMatrix(Double_t covmatrix[6]) const;
68 void GetCovarianceMatrix(Double_t covmatrix[6]) const
69 {GetCovMatrix(covmatrix);}
70 void GetSNR(Double_t snr[3]) const;
71 void SetCovarianceMatrix(const Double_t *cov);
73 Double_t GetXRes() const {return TMath::Sqrt(fCovXX);}
74 Double_t GetYRes() const {return TMath::Sqrt(fCovYY);}
75 Double_t GetZRes() const {return TMath::Sqrt(fCovZZ);}
76 Double_t GetXSNR() const { return fSNR[0]; }
77 Double_t GetYSNR() const { return fSNR[1]; }
78 Double_t GetZSNR() const { return fSNR[2]; }
79 void SetSNR(double snr, int i) {if (i<3 && i>=0) fSNR[i] = snr;}
81 Double_t GetChi2() const { return fChi2; }
82 void SetChi2(Double_t chi) { fChi2 = chi; }
83 Double_t GetChi2toNDF() const
84 { return fChi2/(2.*(Double_t)fNContributors-3.); }
85 Double_t GetChi2perNDF() const { return GetChi2toNDF();}
86 Int_t GetNDF() const {return (2*fNContributors-3);}
88 void Print(Option_t* option = "") const;
89 void PrintStatus() const {Print();}
91 void Reset() { SetToZero(); SetName("Vertex"); }
93 void SetID(Char_t id) {fID=id;}
94 Char_t GetID() const {return fID;}
96 Double_t GetWDist(const AliESDVertex* v) const;
99 static size_t GetSize() { return sizeof(AliFlatESDVertex); }
103 inline AliFlatESDVertex::AliFlatESDVertex() :
107 for( int i=0; i<3; i++) fPosition[i] = -9999;
108 for( int i=0; i<6; i++) fCov[i] = -9999;
111 inline AliFlatESDVertex::AliFlatESDVertex( AliVVConstructorReinitialisationFlag ):
112 fNContributors(fNContributors),
116 for( int i=0; i<3; i++) fPosition[i] = fPosition[i];
117 for( int i=0; i<6; i++) fCov[i] = fCov[i];
120 inline void AliFlatESDVertex::Set(const AliESDVertex &v )
122 fPosition[0] = v.GetX();
123 fPosition[1] = v.GetY();
124 fPosition[2] = v.GetZ();
126 v.GetCovarianceMatrix( c );
127 for( int i=0; i<6; i++) fCov[i] = c[i];
128 fNContributors = v.GetNContributors();
132 typedef struct AliFlatESDVertex AliFlatESDVertex;