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1 | #ifndef ALIGENERATOR_H | |
2 | #define ALIGENERATOR_H | |
3 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
4 | * See cxx source for full Copyright notice */ | |
5 | ||
6 | /* $Id$ */ | |
7 | ||
8 | /////////////////////////////////////////////////////////// | |
9 | // // | |
10 | // Class to generate the particles for the MC // | |
11 | // The base class is empty // | |
12 | // // | |
13 | /////////////////////////////////////////////////////////// | |
14 | ||
15 | class TGenerator; | |
16 | ||
17 | #include "TLorentzVector.h" | |
18 | #include "TArrayF.h" | |
19 | #include "AliRndm.h" | |
20 | ||
21 | typedef enum { kNoSmear, kPerEvent, kPerTrack } VertexSmear_t; | |
22 | ||
23 | class AliGenerator : public TNamed, public AliRndm | |
24 | { | |
25 | ||
26 | public: | |
27 | AliGenerator(); | |
28 | AliGenerator(Int_t npart); | |
29 | AliGenerator(const AliGenerator &gen); | |
30 | virtual ~AliGenerator(); | |
31 | virtual void Init(); | |
32 | void Copy(AliGenerator &gen) const; | |
33 | virtual void SetOrigin(Float_t ox, Float_t oy, Float_t oz); | |
34 | virtual void SetOrigin(const TLorentzVector &o); | |
35 | virtual void SetSigma(Float_t sx, Float_t sy, Float_t sz); | |
36 | virtual void SetMomentumRange(Float_t pmin=0, Float_t pmax=1.e10); | |
37 | virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=100); | |
38 | virtual void SetPhiRange(Float_t phimin=-180., Float_t phimax=180); | |
39 | virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100); | |
40 | virtual void SetVRange(Float_t vxmin, Float_t vxmax, | |
41 | Float_t vymin, Float_t vymax, | |
42 | Float_t vzmin, Float_t vzmax); | |
43 | virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;} | |
44 | virtual Int_t NumberParticles() const {return fNpart;} | |
45 | virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180); | |
46 | virtual void Generate()=0; | |
47 | virtual void SetParentWeight(Float_t wgt) {fParentWeight=wgt;} | |
48 | virtual void SetChildWeight(Float_t wgt) {fChildWeight=wgt;} | |
49 | virtual void SetAnalog(Int_t flag=1) {fAnalog=flag;} | |
50 | virtual void SetVertexSmear(VertexSmear_t smear) {fVertexSmear = smear;} | |
51 | virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;} | |
52 | ||
53 | virtual void SetMC(TGenerator *theMC) | |
54 | {if (!fgMCEvGen) fgMCEvGen =theMC;} | |
55 | ||
56 | AliGenerator & operator=(const AliGenerator &gen); | |
57 | ||
58 | // Getters | |
59 | ||
60 | virtual void GetOrigin(Float_t &ox, Float_t &oy, Float_t &oz) const | |
61 | {ox=fOrigin.At(0);oy=fOrigin.At(1);oz=fOrigin.At(2);} | |
62 | virtual void GetOrigin(TLorentzVector &o) const | |
63 | {o[0]=fOrigin.At(0);o[1]=fOrigin.At(1);o[2]=fOrigin.At(2);o[3]=0;} | |
64 | ||
65 | protected: | |
66 | static TGenerator* fgMCEvGen; // Pointer to the generator | |
67 | Float_t fThetaMin; //Minimum theta of generation in radians | |
68 | Float_t fThetaMax; //Maximum theta of generation in radians | |
69 | Float_t fPhiMin; //Minimum phi of generation in radians | |
70 | Float_t fPhiMax; //Maximum phi of generation in radians | |
71 | Float_t fPMin; //Minimum momentum of generation in GeV/c | |
72 | Float_t fPMax; //Minimum momentum of generation in GeV/c | |
73 | Float_t fPtMin; //Minimum transverse momentum | |
74 | Float_t fPtMax; //Maximum transverse momentum | |
75 | Float_t fYMin; //Minimum rapidity | |
76 | Float_t fYMax; //Maximum rapidity | |
77 | TArrayF fVMin; //Minimum Decaylength | |
78 | TArrayF fVMax; //Minimum Decaylength | |
79 | Int_t fNpart; //Maximum number of particles per event | |
80 | Float_t fParentWeight; //Parent Weight | |
81 | Float_t fChildWeight; //ChildWeight | |
82 | Int_t fTrackit; // Track the generated final state particle if 1 | |
83 | Int_t fAnalog; //Flaf for anolog or pt-weighted generation | |
84 | // | |
85 | VertexSmear_t fVertexSmear; //Vertex Smearing mode | |
86 | Int_t fTrackIt; // if 1 Track final state particles | |
87 | TArrayF fOrigin; //Origin of event | |
88 | TArrayF fOsigma; //Sigma of the Origin of event | |
89 | ||
90 | enum {kThetaRange=1, kVertexRange=2, kPhiRange=4, kPtRange=8, | |
91 | kYRange=32, kMomentumRange=16}; | |
92 | ||
93 | ClassDef(AliGenerator,1) // Base class for event generators | |
94 | }; | |
95 | ||
96 | #endif |