AliCollisionGeometry added.
[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
c9001868 15#include "TLorentzVector.h"
fe4da5cc 16#include "TArrayF.h"
98490ea9 17#include "TMCProcess.h"
18
65fb704d 19#include "AliRndm.h"
69a313ec 20class TGenerator;
21class AliStack;
22
fe4da5cc 23
aee8290b 24typedef enum { kNoSmear, kPerEvent, kPerTrack } VertexSmear_t;
f89cabfe 25typedef enum { kExternal, kInternal} VertexSource_t;
fe4da5cc 26
69a313ec 27
65fb704d 28class AliGenerator : public TNamed, public AliRndm
fe4da5cc 29{
30
fe4da5cc 31 public:
32 AliGenerator();
33 AliGenerator(Int_t npart);
aee8290b 34 AliGenerator(const AliGenerator &gen);
fe4da5cc 35 virtual ~AliGenerator();
36 virtual void Init();
ef42d733 37 void Copy(AliGenerator &gen) const;
94de3818 38 virtual void SetOrigin(Float_t ox, Float_t oy, Float_t oz);
39 virtual void SetOrigin(const TLorentzVector &o);
40 virtual void SetSigma(Float_t sx, Float_t sy, Float_t sz);
41 virtual void SetMomentumRange(Float_t pmin=0, Float_t pmax=1.e10);
d48c5cd4 42 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=1.e10);
94de3818 43 virtual void SetPhiRange(Float_t phimin=-180., Float_t phimax=180);
44 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100);
fe4da5cc 45 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
46 Float_t vymin, Float_t vymax,
94de3818 47 Float_t vzmin, Float_t vzmax);
fe4da5cc 48 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
94de3818 49 virtual Int_t NumberParticles() const {return fNpart;}
50 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180);
fe4da5cc 51 virtual void Generate()=0;
52 virtual void SetParentWeight(Float_t wgt) {fParentWeight=wgt;}
53 virtual void SetChildWeight(Float_t wgt) {fChildWeight=wgt;}
54 virtual void SetAnalog(Int_t flag=1) {fAnalog=flag;}
55 virtual void SetVertexSmear(VertexSmear_t smear) {fVertexSmear = smear;}
c34578e7 56 virtual void SetCutVertexZ(Float_t cut=999999.) {fCutVertexZ = cut;}
e2afb3b6 57 virtual void SetVertexSource(VertexSource_t) {fVertexSource = kInternal;}
4a3ba9d2 58 virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;}
f89cabfe 59 void Vertex();
60 void VertexExternal();
61 virtual void VertexInternal();
2939cc95 62 virtual void FinishRun(){;}
63
fe4da5cc 64 virtual void SetMC(TGenerator *theMC)
65 {if (!fgMCEvGen) fgMCEvGen =theMC;}
c9001868 66
ef42d733 67 AliGenerator & operator=(const AliGenerator &gen);
aee8290b 68
c9001868 69 // Getters
70
94de3818 71 virtual void GetOrigin(Float_t &ox, Float_t &oy, Float_t &oz) const
72 {ox=fOrigin.At(0);oy=fOrigin.At(1);oz=fOrigin.At(2);}
73 virtual void GetOrigin(TLorentzVector &o) const
74 {o[0]=fOrigin.At(0);o[1]=fOrigin.At(1);o[2]=fOrigin.At(2);o[3]=0;}
c9001868 75
69a313ec 76 void SetStack (AliStack *stack) {fStack = stack;}
77 AliStack* GetStack(){return fStack;}
78// Comminication with stack
79 protected:
80 virtual void SetTrack(Int_t done, Int_t parent, Int_t pdg,
81 Float_t *pmom, Float_t *vpos, Float_t *polar,
98490ea9 82 Float_t tof, TMCProcess mech, Int_t &ntr,
47c8bcbe 83 Float_t weight = 1, Int_t is = 0);
69a313ec 84 virtual void SetTrack(Int_t done, Int_t parent, Int_t pdg,
85 Double_t px, Double_t py, Double_t pz, Double_t e,
86 Double_t vx, Double_t vy, Double_t vz, Double_t tof,
87 Double_t polx, Double_t poly, Double_t polz,
98490ea9 88 TMCProcess mech, Int_t &ntr, Float_t weight = 1, Int_t is = 0);
69a313ec 89 virtual void KeepTrack(Int_t itrack);
90 virtual void SetHighWaterMark(Int_t nt);
91
92 protected:
47c8bcbe 93 static TGenerator* fgMCEvGen; //Pointer to the generator
aee8290b 94 Float_t fThetaMin; //Minimum theta of generation in radians
95 Float_t fThetaMax; //Maximum theta of generation in radians
96 Float_t fPhiMin; //Minimum phi of generation in radians
97 Float_t fPhiMax; //Maximum phi of generation in radians
98 Float_t fPMin; //Minimum momentum of generation in GeV/c
99 Float_t fPMax; //Minimum momentum of generation in GeV/c
100 Float_t fPtMin; //Minimum transverse momentum
101 Float_t fPtMax; //Maximum transverse momentum
102 Float_t fYMin; //Minimum rapidity
103 Float_t fYMax; //Maximum rapidity
104 TArrayF fVMin; //Minimum Decaylength
105 TArrayF fVMax; //Minimum Decaylength
106 Int_t fNpart; //Maximum number of particles per event
107 Float_t fParentWeight; //Parent Weight
108 Float_t fChildWeight; //ChildWeight
69a313ec 109 Int_t fAnalog; //Flag for anolog or pt-weighted generation
aee8290b 110 //
f89cabfe 111 VertexSmear_t fVertexSmear; //Vertex Smearing mode
c34578e7 112 VertexSource_t fVertexSource; //Vertex source (internal/external)
113 Float_t fCutVertexZ; // Vertex cut in units of sigma_z
6df200c3 114 Int_t fTrackIt; // if 1, Track final state particles
f89cabfe 115 TArrayF fOrigin; // Origin of event
6df200c3 116 TArrayF fOsigma; // Sigma of the Origin of event
f89cabfe 117 TArrayF fVertex; //! Vertex of current event
c34578e7 118 TArrayF fEventVertex; //!The current event vertex
119
6df200c3 120 AliStack* fStack; //! Local pointer to stack
69a313ec 121 /*************************************************************************/
5e34a898 122 enum {kThetaRange = BIT(14),
123 kVertexRange = BIT(15),
69a313ec 124 kPhiRange = BIT(16),
5e34a898 125 kPtRange = BIT(17),
69a313ec 126 kYRange = BIT(18),
127 kMomentumRange = BIT(19)
5e34a898 128 };
c34578e7 129 ClassDef(AliGenerator,2) // Base class for event generators
fe4da5cc 130};
131
132#endif
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