If the TRD geometry is not stored in the file, get it from gAlice
[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
116cbefd 15#include <TArrayF.h>
16#include <TLorentzVector.h>
17#include <TMCProcess.h>
18
65fb704d 19#include "AliRndm.h"
eeb8ca4e 20
14248849 21class AliVertexGenerator;
116cbefd 22class AliCollisionGeometry;
69a313ec 23class AliStack;
eeb8ca4e 24
116cbefd 25class TGenerator;
26
69a313ec 27
fe4da5cc 28
0b910a04 29typedef enum { kNoSmear, kPerEvent, kPerTrack } VertexSmear_t;
30typedef enum { kExternal, kInternal, kContainer} VertexSource_t;
fe4da5cc 31
69a313ec 32
65fb704d 33class AliGenerator : public TNamed, public AliRndm
fe4da5cc 34{
35
fe4da5cc 36 public:
37 AliGenerator();
38 AliGenerator(Int_t npart);
aee8290b 39 AliGenerator(const AliGenerator &gen);
fe4da5cc 40 virtual ~AliGenerator();
41 virtual void Init();
6c4904c2 42 void Copy(TObject &gen) const;
94de3818 43 virtual void SetOrigin(Float_t ox, Float_t oy, Float_t oz);
44 virtual void SetOrigin(const TLorentzVector &o);
45 virtual void SetSigma(Float_t sx, Float_t sy, Float_t sz);
46 virtual void SetMomentumRange(Float_t pmin=0, Float_t pmax=1.e10);
d48c5cd4 47 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=1.e10);
05be135b 48 virtual void SetPhiRange(Float_t phimin = 0., Float_t phimax = 360.);
94de3818 49 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100);
fe4da5cc 50 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
51 Float_t vymin, Float_t vymax,
94de3818 52 Float_t vzmin, Float_t vzmax);
fe4da5cc 53 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
94de3818 54 virtual Int_t NumberParticles() const {return fNpart;}
55 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180);
fe4da5cc 56 virtual void Generate()=0;
57 virtual void SetParentWeight(Float_t wgt) {fParentWeight=wgt;}
58 virtual void SetChildWeight(Float_t wgt) {fChildWeight=wgt;}
59 virtual void SetAnalog(Int_t flag=1) {fAnalog=flag;}
60 virtual void SetVertexSmear(VertexSmear_t smear) {fVertexSmear = smear;}
c34578e7 61 virtual void SetCutVertexZ(Float_t cut=999999.) {fCutVertexZ = cut;}
0b910a04 62 virtual void SetVertexSource(VertexSource_t source = kInternal) {fVertexSource = source;}
63 virtual void SetVertex(Float_t vx, Float_t vy, Float_t vz)
64 {fVertex[0] = vx; fVertex[1] = vy; fVertex[2] = vz;}
14248849 65 void SetVertexGenerator(AliVertexGenerator* vertexGenerator)
66 {fVertexGenerator = vertexGenerator; fVertexSource = kExternal; fVertexSmear = kPerEvent;}
4a3ba9d2 67 virtual void SetTrackingFlag(Int_t flag=1) {fTrackIt=flag;}
f89cabfe 68 void Vertex();
69 void VertexExternal();
70 virtual void VertexInternal();
0b910a04 71 virtual void FinishRun();
a08cd31a 72 virtual void SetMC(TGenerator *theMC) {fMCEvGen =theMC;}
ef42d733 73 AliGenerator & operator=(const AliGenerator &gen);
aee8290b 74
c9001868 75 // Getters
76
94de3818 77 virtual void GetOrigin(Float_t &ox, Float_t &oy, Float_t &oz) const
78 {ox=fOrigin.At(0);oy=fOrigin.At(1);oz=fOrigin.At(2);}
79 virtual void GetOrigin(TLorentzVector &o) const
80 {o[0]=fOrigin.At(0);o[1]=fOrigin.At(1);o[2]=fOrigin.At(2);o[3]=0;}
2c5b3727 81 // Stack
69a313ec 82 void SetStack (AliStack *stack) {fStack = stack;}
83 AliStack* GetStack(){return fStack;}
2c5b3727 84 // Collision Geometry
116cbefd 85 virtual Bool_t ProvidesCollisionGeometry() const {return kFALSE;}
86 virtual Bool_t NeedsCollisionGeometry() const {return kFALSE;}
39192f05 87 virtual AliCollisionGeometry* CollisionGeometry() const {return fCollisionGeometry;}
2c5b3727 88 virtual void SetCollisionGeometry(AliCollisionGeometry* geom) {fCollisionGeometry = geom;}
69a313ec 89 protected:
642f15cf 90 virtual void PushTrack(Int_t done, Int_t parent, Int_t pdg,
69a313ec 91 Float_t *pmom, Float_t *vpos, Float_t *polar,
98490ea9 92 Float_t tof, TMCProcess mech, Int_t &ntr,
47c8bcbe 93 Float_t weight = 1, Int_t is = 0);
642f15cf 94 virtual void PushTrack(Int_t done, Int_t parent, Int_t pdg,
69a313ec 95 Double_t px, Double_t py, Double_t pz, Double_t e,
96 Double_t vx, Double_t vy, Double_t vz, Double_t tof,
97 Double_t polx, Double_t poly, Double_t polz,
98490ea9 98 TMCProcess mech, Int_t &ntr, Float_t weight = 1, Int_t is = 0);
69a313ec 99 virtual void KeepTrack(Int_t itrack);
100 virtual void SetHighWaterMark(Int_t nt);
101
102 protected:
a08cd31a 103 TGenerator* fMCEvGen; //!Pointer to the generator
aee8290b 104 Float_t fThetaMin; //Minimum theta of generation in radians
105 Float_t fThetaMax; //Maximum theta of generation in radians
106 Float_t fPhiMin; //Minimum phi of generation in radians
107 Float_t fPhiMax; //Maximum phi of generation in radians
108 Float_t fPMin; //Minimum momentum of generation in GeV/c
109 Float_t fPMax; //Minimum momentum of generation in GeV/c
110 Float_t fPtMin; //Minimum transverse momentum
111 Float_t fPtMax; //Maximum transverse momentum
112 Float_t fYMin; //Minimum rapidity
113 Float_t fYMax; //Maximum rapidity
114 TArrayF fVMin; //Minimum Decaylength
115 TArrayF fVMax; //Minimum Decaylength
116 Int_t fNpart; //Maximum number of particles per event
117 Float_t fParentWeight; //Parent Weight
118 Float_t fChildWeight; //ChildWeight
69a313ec 119 Int_t fAnalog; //Flag for anolog or pt-weighted generation
aee8290b 120 //
f89cabfe 121 VertexSmear_t fVertexSmear; //Vertex Smearing mode
c34578e7 122 VertexSource_t fVertexSource; //Vertex source (internal/external)
123 Float_t fCutVertexZ; // Vertex cut in units of sigma_z
6df200c3 124 Int_t fTrackIt; // if 1, Track final state particles
14248849 125 AliVertexGenerator* fVertexGenerator; //! Generator for the vertex
f89cabfe 126 TArrayF fOrigin; // Origin of event
6df200c3 127 TArrayF fOsigma; // Sigma of the Origin of event
f89cabfe 128 TArrayF fVertex; //! Vertex of current event
c34578e7 129
6df200c3 130 AliStack* fStack; //! Local pointer to stack
2c5b3727 131 AliCollisionGeometry* fCollisionGeometry; //!Collision geometry
69a313ec 132 /*************************************************************************/
5e34a898 133 enum {kThetaRange = BIT(14),
134 kVertexRange = BIT(15),
69a313ec 135 kPhiRange = BIT(16),
5e34a898 136 kPtRange = BIT(17),
69a313ec 137 kYRange = BIT(18),
138 kMomentumRange = BIT(19)
5e34a898 139 };
2c5b3727 140 ClassDef(AliGenerator,3) // Base class for event generators
fe4da5cc 141};
142
143#endif
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