Introducing Header instead of Log
[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"
eeb8ca4e 18#include "AliCollisionGeometry.h"
65fb704d 19#include "AliRndm.h"
eeb8ca4e 20
69a313ec 21class TGenerator;
22class AliStack;
eeb8ca4e 23
69a313ec 24
fe4da5cc 25
aee8290b 26typedef enum { kNoSmear, kPerEvent, kPerTrack } VertexSmear_t;
f89cabfe 27typedef enum { kExternal, kInternal} VertexSource_t;
fe4da5cc 28
69a313ec 29
65fb704d 30class AliGenerator : public TNamed, public AliRndm
fe4da5cc 31{
32
fe4da5cc 33 public:
34 AliGenerator();
35 AliGenerator(Int_t npart);
aee8290b 36 AliGenerator(const AliGenerator &gen);
fe4da5cc 37 virtual ~AliGenerator();
38 virtual void Init();
ef42d733 39 void Copy(AliGenerator &gen) const;
94de3818 40 virtual void SetOrigin(Float_t ox, Float_t oy, Float_t oz);
41 virtual void SetOrigin(const TLorentzVector &o);
42 virtual void SetSigma(Float_t sx, Float_t sy, Float_t sz);
43 virtual void SetMomentumRange(Float_t pmin=0, Float_t pmax=1.e10);
d48c5cd4 44 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=1.e10);
94de3818 45 virtual void SetPhiRange(Float_t phimin=-180., Float_t phimax=180);
46 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100);
fe4da5cc 47 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
48 Float_t vymin, Float_t vymax,
94de3818 49 Float_t vzmin, Float_t vzmax);
fe4da5cc 50 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
94de3818 51 virtual Int_t NumberParticles() const {return fNpart;}
52 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180);
fe4da5cc 53 virtual void Generate()=0;
54 virtual void SetParentWeight(Float_t wgt) {fParentWeight=wgt;}
55 virtual void SetChildWeight(Float_t wgt) {fChildWeight=wgt;}
56 virtual void SetAnalog(Int_t flag=1) {fAnalog=flag;}
57 virtual void SetVertexSmear(VertexSmear_t smear) {fVertexSmear = smear;}
c34578e7 58 virtual void SetCutVertexZ(Float_t cut=999999.) {fCutVertexZ = cut;}
e2afb3b6 59 virtual void SetVertexSource(VertexSource_t) {fVertexSource = kInternal;}
4a3ba9d2 60 virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;}
f89cabfe 61 void Vertex();
62 void VertexExternal();
63 virtual void VertexInternal();
2939cc95 64 virtual void FinishRun(){;}
65
fe4da5cc 66 virtual void SetMC(TGenerator *theMC)
67 {if (!fgMCEvGen) fgMCEvGen =theMC;}
c9001868 68
ef42d733 69 AliGenerator & operator=(const AliGenerator &gen);
aee8290b 70
c9001868 71 // Getters
72
94de3818 73 virtual void GetOrigin(Float_t &ox, Float_t &oy, Float_t &oz) const
74 {ox=fOrigin.At(0);oy=fOrigin.At(1);oz=fOrigin.At(2);}
75 virtual void GetOrigin(TLorentzVector &o) const
76 {o[0]=fOrigin.At(0);o[1]=fOrigin.At(1);o[2]=fOrigin.At(2);o[3]=0;}
2c5b3727 77 // Stack
69a313ec 78 void SetStack (AliStack *stack) {fStack = stack;}
79 AliStack* GetStack(){return fStack;}
2c5b3727 80 // Collision Geometry
81 virtual Bool_t ProvidesCollisionGeometry() {return kFALSE;}
82 virtual Bool_t NeedsCollisionGeometry() {return kFALSE;}
83 virtual AliCollisionGeometry* CollisionGeometry() {return fCollisionGeometry;}
84 virtual void SetCollisionGeometry(AliCollisionGeometry* geom) {fCollisionGeometry = geom;}
69a313ec 85 protected:
86 virtual void SetTrack(Int_t done, Int_t parent, Int_t pdg,
87 Float_t *pmom, Float_t *vpos, Float_t *polar,
98490ea9 88 Float_t tof, TMCProcess mech, Int_t &ntr,
47c8bcbe 89 Float_t weight = 1, Int_t is = 0);
69a313ec 90 virtual void SetTrack(Int_t done, Int_t parent, Int_t pdg,
91 Double_t px, Double_t py, Double_t pz, Double_t e,
92 Double_t vx, Double_t vy, Double_t vz, Double_t tof,
93 Double_t polx, Double_t poly, Double_t polz,
98490ea9 94 TMCProcess mech, Int_t &ntr, Float_t weight = 1, Int_t is = 0);
69a313ec 95 virtual void KeepTrack(Int_t itrack);
96 virtual void SetHighWaterMark(Int_t nt);
97
98 protected:
47c8bcbe 99 static TGenerator* fgMCEvGen; //Pointer to the generator
aee8290b 100 Float_t fThetaMin; //Minimum theta of generation in radians
101 Float_t fThetaMax; //Maximum theta of generation in radians
102 Float_t fPhiMin; //Minimum phi of generation in radians
103 Float_t fPhiMax; //Maximum phi of generation in radians
104 Float_t fPMin; //Minimum momentum of generation in GeV/c
105 Float_t fPMax; //Minimum momentum of generation in GeV/c
106 Float_t fPtMin; //Minimum transverse momentum
107 Float_t fPtMax; //Maximum transverse momentum
108 Float_t fYMin; //Minimum rapidity
109 Float_t fYMax; //Maximum rapidity
110 TArrayF fVMin; //Minimum Decaylength
111 TArrayF fVMax; //Minimum Decaylength
112 Int_t fNpart; //Maximum number of particles per event
113 Float_t fParentWeight; //Parent Weight
114 Float_t fChildWeight; //ChildWeight
69a313ec 115 Int_t fAnalog; //Flag for anolog or pt-weighted generation
aee8290b 116 //
f89cabfe 117 VertexSmear_t fVertexSmear; //Vertex Smearing mode
c34578e7 118 VertexSource_t fVertexSource; //Vertex source (internal/external)
119 Float_t fCutVertexZ; // Vertex cut in units of sigma_z
6df200c3 120 Int_t fTrackIt; // if 1, Track final state particles
f89cabfe 121 TArrayF fOrigin; // Origin of event
6df200c3 122 TArrayF fOsigma; // Sigma of the Origin of event
f89cabfe 123 TArrayF fVertex; //! Vertex of current event
c34578e7 124 TArrayF fEventVertex; //!The current event vertex
125
6df200c3 126 AliStack* fStack; //! Local pointer to stack
2c5b3727 127 AliCollisionGeometry* fCollisionGeometry; //!Collision geometry
69a313ec 128 /*************************************************************************/
5e34a898 129 enum {kThetaRange = BIT(14),
130 kVertexRange = BIT(15),
69a313ec 131 kPhiRange = BIT(16),
5e34a898 132 kPtRange = BIT(17),
69a313ec 133 kYRange = BIT(18),
134 kMomentumRange = BIT(19)
5e34a898 135 };
2c5b3727 136 ClassDef(AliGenerator,3) // Base class for event generators
fe4da5cc 137};
138
139#endif
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