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AliCollisionGeometry added.
[u/mrichter/AliRoot.git] / STEER / AliGenerator.h
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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#include "TLorentzVector.h"
16#include "TArrayF.h"
17#include "TMCProcess.h"
18
19#include "AliRndm.h"
20class TGenerator;
21class AliStack;
22
23
24typedef enum { kNoSmear, kPerEvent, kPerTrack } VertexSmear_t;
25typedef enum { kExternal, kInternal} VertexSource_t;
26
27
28class AliGenerator : public TNamed, public AliRndm
29{
30
31 public:
32 AliGenerator();
33 AliGenerator(Int_t npart);
34 AliGenerator(const AliGenerator &gen);
35 virtual ~AliGenerator();
36 virtual void Init();
37 void Copy(AliGenerator &gen) const;
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);
42 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=1.e10);
43 virtual void SetPhiRange(Float_t phimin=-180., Float_t phimax=180);
44 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100);
45 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
46 Float_t vymin, Float_t vymax,
47 Float_t vzmin, Float_t vzmax);
48 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
49 virtual Int_t NumberParticles() const {return fNpart;}
50 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180);
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;}
56 virtual void SetCutVertexZ(Float_t cut=999999.) {fCutVertexZ = cut;}
57 virtual void SetVertexSource(VertexSource_t) {fVertexSource = kInternal;}
58 virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;}
59 void Vertex();
60 void VertexExternal();
61 virtual void VertexInternal();
62 virtual void FinishRun(){;}
63
64 virtual void SetMC(TGenerator *theMC)
65 {if (!fgMCEvGen) fgMCEvGen =theMC;}
66
67 AliGenerator & operator=(const AliGenerator &gen);
68
69 // Getters
70
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;}
75
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,
82 Float_t tof, TMCProcess mech, Int_t &ntr,
83 Float_t weight = 1, Int_t is = 0);
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,
88 TMCProcess mech, Int_t &ntr, Float_t weight = 1, Int_t is = 0);
89 virtual void KeepTrack(Int_t itrack);
90 virtual void SetHighWaterMark(Int_t nt);
91
92 protected:
93 static TGenerator* fgMCEvGen; //Pointer to the generator
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
109 Int_t fAnalog; //Flag for anolog or pt-weighted generation
110 //
111 VertexSmear_t fVertexSmear; //Vertex Smearing mode
112 VertexSource_t fVertexSource; //Vertex source (internal/external)
113 Float_t fCutVertexZ; // Vertex cut in units of sigma_z
114 Int_t fTrackIt; // if 1, Track final state particles
115 TArrayF fOrigin; // Origin of event
116 TArrayF fOsigma; // Sigma of the Origin of event
117 TArrayF fVertex; //! Vertex of current event
118 TArrayF fEventVertex; //!The current event vertex
119
120 AliStack* fStack; //! Local pointer to stack
121 /*************************************************************************/
122 enum {kThetaRange = BIT(14),
123 kVertexRange = BIT(15),
124 kPhiRange = BIT(16),
125 kPtRange = BIT(17),
126 kYRange = BIT(18),
127 kMomentumRange = BIT(19)
128 };
129 ClassDef(AliGenerator,2) // Base class for event generators
130};
131
132#endif
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