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 ///////////////////////////////////////////////////////////
15 #include "TLorentzVector.h"
17 #include "TGenerator.h"
20 typedef enum { kNoSmear, kPerEvent, kPerTrack } VertexSmear_t;
22 class AliGenerator : public TNamed, public AliRndm
27 AliGenerator(Int_t npart);
28 AliGenerator(const AliGenerator &gen);
29 virtual ~AliGenerator();
31 void Copy(AliGenerator &gen) const;
32 virtual void SetOrigin(Float_t ox, Float_t oy, Float_t oz);
33 virtual void SetOrigin(const TLorentzVector &o);
34 virtual void SetSigma(Float_t sx, Float_t sy, Float_t sz);
35 virtual void SetMomentumRange(Float_t pmin=0, Float_t pmax=1.e10);
36 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=100);
37 virtual void SetPhiRange(Float_t phimin=-180., Float_t phimax=180);
38 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100);
39 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
40 Float_t vymin, Float_t vymax,
41 Float_t vzmin, Float_t vzmax);
42 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
43 virtual Int_t NumberParticles() const {return fNpart;}
44 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180);
45 virtual void Generate()=0;
46 virtual void SetParentWeight(Float_t wgt) {fParentWeight=wgt;}
47 virtual void SetChildWeight(Float_t wgt) {fChildWeight=wgt;}
48 virtual void SetAnalog(Int_t flag=1) {fAnalog=flag;}
49 virtual void SetVertexSmear(VertexSmear_t smear) {fVertexSmear = smear;}
50 virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;}
52 virtual void SetMC(TGenerator *theMC)
53 {if (!fgMCEvGen) fgMCEvGen =theMC;}
55 AliGenerator & operator=(const AliGenerator &gen);
59 virtual void GetOrigin(Float_t &ox, Float_t &oy, Float_t &oz) const
60 {ox=fOrigin.At(0);oy=fOrigin.At(1);oz=fOrigin.At(2);}
61 virtual void GetOrigin(TLorentzVector &o) const
62 {o[0]=fOrigin.At(0);o[1]=fOrigin.At(1);o[2]=fOrigin.At(2);o[3]=0;}
65 static TGenerator* fgMCEvGen; // Pointer to the generator
66 Float_t fThetaMin; //Minimum theta of generation in radians
67 Float_t fThetaMax; //Maximum theta of generation in radians
68 Float_t fPhiMin; //Minimum phi of generation in radians
69 Float_t fPhiMax; //Maximum phi of generation in radians
70 Float_t fPMin; //Minimum momentum of generation in GeV/c
71 Float_t fPMax; //Minimum momentum of generation in GeV/c
72 Float_t fPtMin; //Minimum transverse momentum
73 Float_t fPtMax; //Maximum transverse momentum
74 Float_t fYMin; //Minimum rapidity
75 Float_t fYMax; //Maximum rapidity
76 TArrayF fVMin; //Minimum Decaylength
77 TArrayF fVMax; //Minimum Decaylength
78 Int_t fNpart; //Maximum number of particles per event
79 Float_t fParentWeight; //Parent Weight
80 Float_t fChildWeight; //ChildWeight
81 Int_t fTrackit; // Track the generated final state particle if 1
82 Int_t fAnalog; //Flaf for anolog or pt-weighted generation
84 VertexSmear_t fVertexSmear; //Vertex Smearing mode
85 Int_t fTrackIt; // if 1 Track final state particles
86 TArrayF fOrigin; //Origin of event
87 TArrayF fOsigma; //Sigma of the Origin of event
89 enum {kThetaRange=1, kVertexRange=2, kPhiRange=4, kPtRange=8,
90 kYRange=32, kMomentumRange=16};
92 ClassDef(AliGenerator,1) // Base class for event generators