Event and Track classes The Event class is a naive/simple example of an event structure. public: char fType[20]; char *fEventName; //run+event number in character format Int_t fNtrack; Int_t fNseg; Int_t fNvertex; UInt_t fFlag; Double32_t fTemperature; Int_t fMeasures[10]; Double32_t fMatrix[4][4]; Double32_t *fClosestDistance; //[fNvertex] indexed array! EventHeader fEvtHdr; TClonesArray *fTracks; TRefArray *fHighPt; //array of High Pt tracks only TRefArray *fMuons; //array of Muon tracks only TRef fLastTrack; //pointer to last track TRef fHistoWeb; //EXEC:GetHistoWeb reference to an histogram in a TWebFile TH1F *fH; TBits fTriggerBits; //Bits triggered by this event. The EventHeader class has 3 data members (integers): public: Int_t fEvtNum; Int_t fRun; Int_t fDate; The Event data member fTracks is a pointer to a TClonesArray. It is an array of a variable number of tracks per event. Each element of the array is an object of class Track with the members: private: Float_t fPx; //X component of the momentum Float_t fPy; //Y component of the momentum Float_t fPz; //Z component of the momentum Float_t fRandom; //A random track quantity Float_t fMass2; //The mass square of this particle Float_t fBx; //X intercept at the vertex Float_t fBy; //Y intercept at the vertex Float_t fMeanCharge; //Mean charge deposition of all hits of this track Float_t fXfirst; //X coordinate of the first point Float_t fXlast; //X coordinate of the last point Float_t fYfirst; //Y coordinate of the first point Float_t fYlast; //Y coordinate of the last point Float_t fZfirst; //Z coordinate of the first point Float_t fZlast; //Z coordinate of the last point Double32_t fCharge; //Charge of this track Double32_t fVertex[3]; //Track vertex position Int_t fNpoint; //Number of points for this track Short_t fValid; //Validity criterion Int_t fNsp; //Number of points for this track with a special value Double32_t *fPointValue; //[fNsp] a special quantity for some point. TBits fTriggerBits; //Bits triggered by this track. An example of a batch program to use the Event/Track classes is given in this directory: MainEvent. Look also in the same directory at the following macros: - eventa.C an example how to read the tree - eventb.C how to read events conditionally During the processing of the event (optionally) also a large number of histograms can be filled. The creation and handling of the histograms is taken care of by the HistogramManager class.

EventHeader() | |

EventHeader(const EventHeader&) | |

virtual | ~EventHeader() |

static TClass* | Class() |

Int_t | GetDate() const |

Int_t | GetEvtNum() const |

Int_t | GetRun() const |

virtual TClass* | IsA() const |

EventHeader& | operator=(const EventHeader&) |

void | Set(Int_t i, Int_t r, Int_t d) |

virtual void | ShowMembers(TMemberInspector& insp, char* parent) |

virtual void | Streamer(TBuffer& b) |

void | StreamerNVirtual(TBuffer& b) |