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syst. check that reads the MC information for the case of TPC-only
[u/mrichter/AliRoot.git] / STEER / AliVertexer.h
1 #ifndef ALIVERTEXER_H
2 #define ALIVERTEXER_H
3
4 ///////////////////////////////////////////////////////////////////
5 //                                                               //
6 // Base class for primary vertex reconstruction                  //
7 //                                                               //
8 ///////////////////////////////////////////////////////////////////
9
10 #include<TObject.h>
11
12 class TTree;
13 class AliESDVertex;
14 class AliMultiplicity;
15
16
17 class AliVertexer : public TObject {
18
19  public:
20     // default constructor
21     AliVertexer();  
22  
23     // destructor
24     virtual ~AliVertexer();
25     // computes the vertex for the current event
26     virtual AliESDVertex* FindVertexForCurrentEvent(TTree *clustersTree)=0; 
27     // computes the vertex for each event and stores it on file
28     AliMultiplicity* GetMultiplicity() const {return fMult;}
29     virtual void PrintStatus() const = 0;
30     void SetVtxStart(Double_t x,Double_t y,Double_t z) 
31       { fNominalPos[0]=x; fNominalPos[1]=y; fNominalPos[2]=z; }
32     void SetVtxStartSigma(Double_t sx,Double_t sy,Double_t sz) 
33       { fNominalCov[0]=sx*sx; fNominalCov[2]=sy*sy; fNominalCov[5]=sz*sz;
34       fNominalCov[1]=0.; fNominalCov[3]=0.; fNominalCov[4]=0.; }
35     void SetVtxStart(AliESDVertex *vtx);
36
37     const Double_t* GetNominalPos() const {return fNominalPos;}
38
39  protected:
40     AliESDVertex *fCurrentVertex; //! pointer to the current vertex
41     AliMultiplicity *fMult;     //! Multiplicity object
42  
43  private:
44     // copy constructor (NO copy allowed: the constructor is protected
45     // to avoid misuse)
46     AliVertexer(const AliVertexer& vtxr);
47     // assignment operator (NO assignment allowed)
48     AliVertexer& operator=(const AliVertexer& /* vtxr */);
49
50     Double_t  fNominalPos[3];   // initial knowledge on vertex position
51     Double_t  fNominalCov[6];   // initial knowledge on vertex position
52
53   ClassDef(AliVertexer,4);
54 };
55
56 #endif