3 /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 ///////////////////////////////////////////////////////////
10 // Class to generate the particles for the MC //
11 // The base class is empty //
13 ///////////////////////////////////////////////////////////
17 #include "TLorentzVector.h"
21 typedef enum { kNoSmear, kPerEvent, kPerTrack } VertexSmear_t;
22 typedef enum { kExternal, kInternal} VertexSource_t;
24 class AliGenerator : public TNamed, public AliRndm
29 AliGenerator(Int_t npart);
30 AliGenerator(const AliGenerator &gen);
31 virtual ~AliGenerator();
33 void Copy(AliGenerator &gen) const;
34 virtual void SetOrigin(Float_t ox, Float_t oy, Float_t oz);
35 virtual void SetOrigin(const TLorentzVector &o);
36 virtual void SetSigma(Float_t sx, Float_t sy, Float_t sz);
37 virtual void SetMomentumRange(Float_t pmin=0, Float_t pmax=1.e10);
38 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=100);
39 virtual void SetPhiRange(Float_t phimin=-180., Float_t phimax=180);
40 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100);
41 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
42 Float_t vymin, Float_t vymax,
43 Float_t vzmin, Float_t vzmax);
44 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
45 virtual Int_t NumberParticles() const {return fNpart;}
46 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180);
47 virtual void Generate()=0;
48 virtual void SetParentWeight(Float_t wgt) {fParentWeight=wgt;}
49 virtual void SetChildWeight(Float_t wgt) {fChildWeight=wgt;}
50 virtual void SetAnalog(Int_t flag=1) {fAnalog=flag;}
51 virtual void SetVertexSmear(VertexSmear_t smear) {fVertexSmear = smear;}
52 virtual void SetVertexSource(VertexSource_t smear) {fVertexSource = kInternal;}
53 virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;}
55 void VertexExternal();
56 virtual void VertexInternal();
58 virtual void SetMC(TGenerator *theMC)
59 {if (!fgMCEvGen) fgMCEvGen =theMC;}
61 AliGenerator & operator=(const AliGenerator &gen);
65 virtual void GetOrigin(Float_t &ox, Float_t &oy, Float_t &oz) const
66 {ox=fOrigin.At(0);oy=fOrigin.At(1);oz=fOrigin.At(2);}
67 virtual void GetOrigin(TLorentzVector &o) const
68 {o[0]=fOrigin.At(0);o[1]=fOrigin.At(1);o[2]=fOrigin.At(2);o[3]=0;}
71 static TGenerator* fgMCEvGen; // Pointer to the generator
72 Float_t fThetaMin; //Minimum theta of generation in radians
73 Float_t fThetaMax; //Maximum theta of generation in radians
74 Float_t fPhiMin; //Minimum phi of generation in radians
75 Float_t fPhiMax; //Maximum phi of generation in radians
76 Float_t fPMin; //Minimum momentum of generation in GeV/c
77 Float_t fPMax; //Minimum momentum of generation in GeV/c
78 Float_t fPtMin; //Minimum transverse momentum
79 Float_t fPtMax; //Maximum transverse momentum
80 Float_t fYMin; //Minimum rapidity
81 Float_t fYMax; //Maximum rapidity
82 TArrayF fVMin; //Minimum Decaylength
83 TArrayF fVMax; //Minimum Decaylength
84 Int_t fNpart; //Maximum number of particles per event
85 Float_t fParentWeight; //Parent Weight
86 Float_t fChildWeight; //ChildWeight
87 Int_t fTrackit; // Track the generated final state particle if 1
88 Int_t fAnalog; //Flaf for anolog or pt-weighted generation
90 VertexSmear_t fVertexSmear; //Vertex Smearing mode
91 VertexSource_t fVertexSource; //Vertex source (internal/external)
92 Int_t fTrackIt; // if 1 Track final state particles
93 TArrayF fOrigin; // Origin of event
94 TArrayF fOsigma; // Sigma of the Origin of even
95 TArrayF fVertex; //! Vertex of current event
97 enum {kThetaRange=1, kVertexRange=2, kPhiRange=4, kPtRange=8,
98 kYRange=32, kMomentumRange=16};
100 ClassDef(AliGenerator,1) // Base class for event generators