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 { none, perEvent, perTrack } VertexSmear_t;
21 class AliGenerator : public TNamed
25 static TGenerator* fgMCEvGen;
26 Float_t fThetaMin; //Minimum theta of generation in radians
27 Float_t fThetaMax; //Maximum theta of generation in radians
28 Float_t fPhiMin; //Minimum phi of generation in radians
29 Float_t fPhiMax; //Maximum phi of generation in radians
30 Float_t fPMin; //Minimum momentum of generation in GeV/c
31 Float_t fPMax; //Minimum momentum of generation in GeV/c
32 Float_t fPtMin; //Minimum transverse momentum
33 Float_t fPtMax; //Maximum transverse momentum
34 Float_t fYMin; //Minimum rapidity
35 Float_t fYMax; //Maximum rapidity
36 TArrayF fVMin; //Minimum Decaylength
37 TArrayF fVMax; //Minimum Decaylength
38 Int_t fNpart; //Maximum number of particles per event
39 Float_t fParentWeight; //Parent Weight
40 Float_t fChildWeight; //ChildWeight
41 Int_t fTrackit; // Track the generated final state particle if 1
42 Int_t fAnalog; //Flaf for anolog or pt-weighted generation
44 VertexSmear_t fVertexSmear; //Vertex Smearing mode
45 Int_t fTrackIt; // if 1 Track final state particles
46 TArrayF fOrigin; //Origin of event
47 TArrayF fOsigma; //Sigma of the Origin of event
51 AliGenerator(Int_t npart);
52 virtual ~AliGenerator();
54 virtual void SetOrigin(Float_t ox, Float_t oy, Float_t oz)
55 {fOrigin[0]=ox;fOrigin[1]=oy;fOrigin[2]=oz;}
56 virtual void SetOrigin(const TLorentzVector &o)
57 {fOrigin[0]=o[0];fOrigin[1]=o[1];fOrigin[2]=o[2];}
58 virtual void SetSigma(Float_t sx, Float_t sy, Float_t sz)
59 {fOsigma[0]=sx;fOsigma[1]=sy;fOsigma[2]=sz;}
60 virtual void SetMomentumRange(Float_t pmin=0, Float_t pmax=1.e10)
61 {fPMin = pmin; fPMax = pmax;}
62 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=20.)
63 {fPtMin = ptmin; fPtMax = ptmax;}
64 virtual void SetPhiRange(Float_t phimin=-180., Float_t phimax=180)
65 {fPhiMin = TMath::Pi()*phimin/180;
66 fPhiMax = TMath::Pi()*phimax/180;}
67 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100)
68 {fYMin=ymin; fYMax=ymax;}
69 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
70 Float_t vymin, Float_t vymax,
71 Float_t vzmin, Float_t vzmax)
73 fVMin[0]=vxmin; fVMin[1]=vymin; fVMin[2]=vzmin;
74 fVMax[0]=vxmax; fVMax[1]=vymax; fVMax[2]=vzmax;
76 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
77 virtual Int_t NumberParticles() {return fNpart;}
78 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180)
79 {fThetaMin = TMath::Pi()*thetamin/180;
80 fThetaMax = TMath::Pi()*thetamax/180;}
81 virtual void Generate()=0;
82 virtual void SetParentWeight(Float_t wgt) {fParentWeight=wgt;}
83 virtual void SetChildWeight(Float_t wgt) {fChildWeight=wgt;}
84 virtual void SetAnalog(Int_t flag=1) {fAnalog=flag;}
85 virtual void SetVertexSmear(VertexSmear_t smear) {fVertexSmear = smear;}
86 virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;}
88 virtual void SetMC(TGenerator *theMC)
89 {if (!fgMCEvGen) fgMCEvGen =theMC;}
93 virtual void GetOrigin(Float_t &ox, Float_t &oy, Float_t &oz)
94 {ox=fOrigin[0];oy=fOrigin[1];oz=fOrigin[2];}
95 virtual void GetOrigin(TLorentzVector &o)
96 {o[0]=fOrigin[0];o[1]=fOrigin[1];o[2]=fOrigin[2];o[3]=0;}
98 ClassDef(AliGenerator,1)