Changing the type of the value returned by GetTPCsignalN()
[u/mrichter/AliRoot.git] / STEER / AliESDVertex.h
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d681bb2d 1#ifndef ALIESDVERTEX_H
2#define ALIESDVERTEX_H
0fc5cc25 3/* Copyright(c) 1998-2003, ALICE Experiment at CERN, All rights reserved. *
c5f0f3c1 4 * See cxx source for full Copyright notice */
504de69b 5
2257f27e 6/* $Id$ */
c5f0f3c1 7
8//-------------------------------------------------------
9// Primary Vertex Class
af7ba10c 10// for the Event Data Summary Class
c5f0f3c1 11// Origin: A.Dainese, Padova, andrea.dainese@pd.infn.it
12//-------------------------------------------------------
13
14/*****************************************************************************
15 * *
16 * This class deals with primary vertex. *
d681bb2d 17 * AliESDVertex objects are created by the class AliITSVertexer and its *
c5f0f3c1 18 * derived classes. *
19 * Different constructors are provided: *
20 * - for primary vertex determined with pixels in pp (only Z) *
21 * - for primary vertex determined with pixels in ion-ion (X,Y,Z) *
22 * - for primary vertex determined with ITS tracks in pp (X,Y,Z) *
d681bb2d 23 * This class replaces the previous version of AliESDVertex, designed *
c5f0f3c1 24 * originally only for A-A collisions. The functionalities of the old class *
25 * are maintained in the AliITSVertexerIons class *
26 * *
27 *****************************************************************************/
28
090026bf 29#include <TMath.h>
c5f0f3c1 30
d65adc48 31#include "AliVertex.h"
8a553be2 32
33class AliESDVertex : public AliVertex {
504de69b 34
35 public:
36
d681bb2d 37 AliESDVertex();
38 AliESDVertex(Double_t positionZ,Double_t sigmaZ,Int_t nContributors,
a27d7b02 39 const Char_t *vtxName="Vertex");
d681bb2d 40 AliESDVertex(Double_t position[3],Double_t covmatrix[6],
c5f0f3c1 41 Double_t chi2,Int_t nContributors,
a27d7b02 42 const Char_t *vtxName="Vertex");
d681bb2d 43 AliESDVertex(Double_t position[3],Double_t sigma[3],
a27d7b02 44 const Char_t *vtxName="Vertex");
d681bb2d 45 AliESDVertex(Double_t position[3],Double_t sigma[3],Double_t snr[3],
a27d7b02 46 const Char_t *vtxName="Vertex");
c5f0f3c1 47
8a553be2 48 virtual ~AliESDVertex(){;}
c5f0f3c1 49
50
c5f0f3c1 51 void GetSigmaXYZ(Double_t sigma[3]) const;
52 void GetCovMatrix(Double_t covmatrix[6]) const;
53 void GetSNR(Double_t snr[3]) const;
54
8a553be2 55 Double_t GetXRes() const {return TMath::Sqrt(fCovXX);}
56 Double_t GetYRes() const {return TMath::Sqrt(fCovYY);}
57 Double_t GetZRes() const {return TMath::Sqrt(fCovZZ);}
c5f0f3c1 58 Double_t GetXSNR() const { return fSNR[0]; }
59 Double_t GetYSNR() const { return fSNR[1]; }
60 Double_t GetZSNR() const { return fSNR[2]; }
61
c5f0f3c1 62 Double_t GetChi2() const { return fChi2; }
63 Double_t GetChi2toNDF() const
64 { return fChi2/(2.*(Double_t)fNContributors-3.); }
c5f0f3c1 65
5f7789fc 66 void Print(Option_t* option = "") const;
67 void PrintStatus() const {Print();}
0fc5cc25 68 void SetTruePos(Double_t *tp){for(Int_t i=0;i<3;i++)fTruePos[i]=tp[i];}
d2fbf7bb 69 void GetTruePos(Double_t *tp) const
70 {for(Int_t i=0;i<3;i++)tp[i]=fTruePos[i];}
bf25155c 71
72 void Reset() { SetToZero(); SetName("Vertex"); }
73
0fc5cc25 74 protected:
75
c5f0f3c1 76 Double_t fCovXX,fCovXY,fCovYY,fCovXZ,fCovYZ,fCovZZ; // vertex covariance matrix
77 Double_t fSNR[3]; // S/N ratio
c5f0f3c1 78 Double_t fChi2; // chi2 of vertex fit
0fc5cc25 79 Double_t fTruePos[3]; //true vertex position (for comparison purposes)
af7ba10c 80
81 private:
82
83 void SetToZero();
84
8a553be2 85 ClassDef(AliESDVertex,5) // Class for Primary Vertex
af7ba10c 86};
504de69b 87
88#endif
c5f0f3c1 89
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