Many changes to SPD, SDD and SSD
[u/mrichter/AliRoot.git] / STEER / AliGenerator.h
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fe4da5cc 1#ifndef ALIGENERATOR_H
2#define ALIGENERATOR_H
3da30618 3/* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
5
6/* $Id$ */
7
fe4da5cc 8///////////////////////////////////////////////////////////
9// //
10// Class to generate the particles for the MC //
11// The base class is empty //
12// //
13///////////////////////////////////////////////////////////
14
b23a502f 15class TGenerator;
16
c9001868 17#include "TLorentzVector.h"
fe4da5cc 18#include "TArrayF.h"
65fb704d 19#include "AliRndm.h"
fe4da5cc 20
aee8290b 21typedef enum { kNoSmear, kPerEvent, kPerTrack } VertexSmear_t;
fe4da5cc 22
65fb704d 23class AliGenerator : public TNamed, public AliRndm
fe4da5cc 24{
25
fe4da5cc 26 public:
27 AliGenerator();
28 AliGenerator(Int_t npart);
aee8290b 29 AliGenerator(const AliGenerator &gen);
fe4da5cc 30 virtual ~AliGenerator();
31 virtual void Init();
ef42d733 32 void Copy(AliGenerator &gen) const;
94de3818 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);
10797936 37 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=100);
94de3818 38 virtual void SetPhiRange(Float_t phimin=-180., Float_t phimax=180);
39 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100);
fe4da5cc 40 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
41 Float_t vymin, Float_t vymax,
94de3818 42 Float_t vzmin, Float_t vzmax);
fe4da5cc 43 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
94de3818 44 virtual Int_t NumberParticles() const {return fNpart;}
45 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180);
fe4da5cc 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;}
4a3ba9d2 51 virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;}
52
fe4da5cc 53 virtual void SetMC(TGenerator *theMC)
54 {if (!fgMCEvGen) fgMCEvGen =theMC;}
c9001868 55
ef42d733 56 AliGenerator & operator=(const AliGenerator &gen);
aee8290b 57
c9001868 58 // Getters
59
94de3818 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;}
c9001868 64
aee8290b 65protected:
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
94de3818 93 ClassDef(AliGenerator,1) // Base class for event generators
fe4da5cc 94};
95
96#endif