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