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First version of kdtree (Alexander, Marian)
[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;
d6eec420 23class AliGenEventHeader;
69a313ec 24class AliStack;
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);
39 virtual ~AliGenerator();
40 virtual void Init();
94de3818 41 virtual void SetOrigin(Float_t ox, Float_t oy, Float_t oz);
42 virtual void SetOrigin(const TLorentzVector &o);
43 virtual void SetSigma(Float_t sx, Float_t sy, Float_t sz);
44 virtual void SetMomentumRange(Float_t pmin=0, Float_t pmax=1.e10);
d48c5cd4 45 virtual void SetPtRange(Float_t ptmin=0, Float_t ptmax=1.e10);
05be135b 46 virtual void SetPhiRange(Float_t phimin = 0., Float_t phimax = 360.);
94de3818 47 virtual void SetYRange(Float_t ymin=-100, Float_t ymax=100);
fe4da5cc 48 virtual void SetVRange(Float_t vxmin, Float_t vxmax,
49 Float_t vymin, Float_t vymax,
94de3818 50 Float_t vzmin, Float_t vzmax);
fe4da5cc 51 virtual void SetNumberParticles(Int_t npart=100) {fNpart=npart;}
94de3818 52 virtual Int_t NumberParticles() const {return fNpart;}
53 virtual void SetThetaRange(Float_t thetamin=0, Float_t thetamax=180);
fe4da5cc 54 virtual void Generate()=0;
55 virtual void SetParentWeight(Float_t wgt) {fParentWeight=wgt;}
56 virtual void SetChildWeight(Float_t wgt) {fChildWeight=wgt;}
57 virtual void SetAnalog(Int_t flag=1) {fAnalog=flag;}
58 virtual void SetVertexSmear(VertexSmear_t smear) {fVertexSmear = smear;}
c34578e7 59 virtual void SetCutVertexZ(Float_t cut=999999.) {fCutVertexZ = cut;}
0b910a04 60 virtual void SetVertexSource(VertexSource_t source = kInternal) {fVertexSource = source;}
61 virtual void SetVertex(Float_t vx, Float_t vy, Float_t vz)
62 {fVertex[0] = vx; fVertex[1] = vy; fVertex[2] = vz;}
14248849 63 void SetVertexGenerator(AliVertexGenerator* vertexGenerator)
64 {fVertexGenerator = vertexGenerator; fVertexSource = kExternal; fVertexSmear = kPerEvent;}
f0831961 65 void SetPileUpTimeWindow(Float_t pileUpTimeW) {fPileUpTimeWindow = pileUpTimeW;}
66
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;}
d6eec420 73 virtual void AddHeader(AliGenEventHeader* /*header*/) {;}
74 virtual void SetContainer(AliGenerator* container) {fContainer = container;}
aee8290b 75
c9001868 76 // Getters
77
94de3818 78 virtual void GetOrigin(Float_t &ox, Float_t &oy, Float_t &oz) const
79 {ox=fOrigin.At(0);oy=fOrigin.At(1);oz=fOrigin.At(2);}
80 virtual void GetOrigin(TLorentzVector &o) const
81 {o[0]=fOrigin.At(0);o[1]=fOrigin.At(1);o[2]=fOrigin.At(2);o[3]=0;}
2c5b3727 82 // Stack
69a313ec 83 void SetStack (AliStack *stack) {fStack = stack;}
84 AliStack* GetStack(){return fStack;}
2c5b3727 85 // Collision Geometry
116cbefd 86 virtual Bool_t ProvidesCollisionGeometry() const {return kFALSE;}
87 virtual Bool_t NeedsCollisionGeometry() const {return kFALSE;}
39192f05 88 virtual AliCollisionGeometry* CollisionGeometry() const {return fCollisionGeometry;}
2c5b3727 89 virtual void SetCollisionGeometry(AliCollisionGeometry* geom) {fCollisionGeometry = geom;}
69a313ec 90 protected:
642f15cf 91 virtual void PushTrack(Int_t done, Int_t parent, Int_t pdg,
69a313ec 92 Float_t *pmom, Float_t *vpos, Float_t *polar,
98490ea9 93 Float_t tof, TMCProcess mech, Int_t &ntr,
47c8bcbe 94 Float_t weight = 1, Int_t is = 0);
642f15cf 95 virtual void PushTrack(Int_t done, Int_t parent, Int_t pdg,
69a313ec 96 Double_t px, Double_t py, Double_t pz, Double_t e,
97 Double_t vx, Double_t vy, Double_t vz, Double_t tof,
98 Double_t polx, Double_t poly, Double_t polz,
98490ea9 99 TMCProcess mech, Int_t &ntr, Float_t weight = 1, Int_t is = 0);
69a313ec 100 virtual void KeepTrack(Int_t itrack);
101 virtual void SetHighWaterMark(Int_t nt);
102
103 protected:
a08cd31a 104 TGenerator* fMCEvGen; //!Pointer to the generator
aee8290b 105 Float_t fThetaMin; //Minimum theta of generation in radians
106 Float_t fThetaMax; //Maximum theta of generation in radians
107 Float_t fPhiMin; //Minimum phi of generation in radians
108 Float_t fPhiMax; //Maximum phi of generation in radians
109 Float_t fPMin; //Minimum momentum of generation in GeV/c
110 Float_t fPMax; //Minimum momentum of generation in GeV/c
111 Float_t fPtMin; //Minimum transverse momentum
112 Float_t fPtMax; //Maximum transverse momentum
113 Float_t fYMin; //Minimum rapidity
114 Float_t fYMax; //Maximum rapidity
115 TArrayF fVMin; //Minimum Decaylength
116 TArrayF fVMax; //Minimum Decaylength
117 Int_t fNpart; //Maximum number of particles per event
118 Float_t fParentWeight; //Parent Weight
119 Float_t fChildWeight; //ChildWeight
69a313ec 120 Int_t fAnalog; //Flag for anolog or pt-weighted generation
aee8290b 121 //
f89cabfe 122 VertexSmear_t fVertexSmear; //Vertex Smearing mode
c34578e7 123 VertexSource_t fVertexSource; //Vertex source (internal/external)
f0831961 124 Float_t fCutVertexZ; //Vertex cut in units of sigma_z
125 Float_t fPileUpTimeWindow; //Time window for pile-up events
6df200c3 126 Int_t fTrackIt; // if 1, Track final state particles
14248849 127 AliVertexGenerator* fVertexGenerator; //! Generator for the vertex
f89cabfe 128 TArrayF fOrigin; // Origin of event
6df200c3 129 TArrayF fOsigma; // Sigma of the Origin of event
d6eec420 130 TArrayF fVertex; //! Vertex of current event
c34578e7 131
d6eec420 132 AliStack* fStack; //! Local pointer to stack
133 AliGenerator* fContainer; //! Local pointer to container
134
2c5b3727 135 AliCollisionGeometry* fCollisionGeometry; //!Collision geometry
69a313ec 136 /*************************************************************************/
5e34a898 137 enum {kThetaRange = BIT(14),
138 kVertexRange = BIT(15),
69a313ec 139 kPhiRange = BIT(16),
5e34a898 140 kPtRange = BIT(17),
69a313ec 141 kYRange = BIT(18),
142 kMomentumRange = BIT(19)
5e34a898 143 };
93a2041b 144
145 private:
146 AliGenerator(const AliGenerator &gen);
147 AliGenerator & operator=(const AliGenerator &gen);
148
2c5b3727 149 ClassDef(AliGenerator,3) // Base class for event generators
fe4da5cc 150};
151
152#endif
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