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1 | /* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * |
| 2 | * See cxx source for full Copyright notice */ |
| 3 | /* $Id$ */ |
| 4 | |
| 5 | // AliFlowOnTheFlyEventGenerator |
| 6 | // origin: Redmer Alexander Bertens (rbertens@cern.ch, rbertens@nikhef.nl, rbertens@uu.nl) |
| 7 | |
| 8 | #ifndef ALIFLOWONTHEFLYEVENTGENERATOR_H |
| 9 | #define ALIFLOWONTHEFLYEVENTGENERATOR_H |
| 10 | |
| 11 | #include "TObject.h" |
| 12 | #include "TClonesArray.h" |
| 13 | #include "TRandom.h" |
| 14 | #include "TH1F.h" |
| 15 | #include "TH2F.h" |
| 16 | #include "TF1.h" |
| 17 | #include "TParticle.h" |
| 18 | |
| 19 | class AliFlowEventSimple; |
| 20 | class TVirtualMCDecayer; |
| 21 | |
| 22 | class AliFlowOnTheFlyEventGenerator : public TObject { |
| 23 | public: |
| 24 | // general |
| 25 | AliFlowOnTheFlyEventGenerator(); |
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26 | AliFlowOnTheFlyEventGenerator(Bool_t qa, Int_t ff, Int_t mult, TVirtualMCDecayer* decayer, Bool_t a, Bool_t b, Bool_t c, Bool_t d); |
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27 | virtual ~AliFlowOnTheFlyEventGenerator(); |
| 28 | class NaiveFlowAndSpectrumGenerator : public TObject { // small nested helper class. use methods of AliFlowOnTheFlyEventGenerator to get access to members |
| 29 | public: |
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30 | NaiveFlowAndSpectrumGenerator(Short_t pdg, Bool_t qa, Int_t ff) : fPdg(pdg), fQA(qa), fFF(ff), fpt(0), fv2(0), fv3(0), fQApt(0), fQAv2(0), fQAv3(0) { |
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31 | TParticle* t = new TParticle(); t->SetPdgCode(fPdg); |
| 32 | fpt = new TF1(Form("pt_%i", pdg), Form("x/TMath::Power(1+2*TMath::Sqrt(%f*%f+x*x),4)", t->GetMass(), t->GetMass()),0.,20); |
| 33 | fv2 = new TF1(Form("v2_%i", pdg), Form("TMath::Log(x+1)*.2/TMath::Power(%f*%f+x*x,.2)", t->GetMass(), t->GetMass()), 0., 20); |
| 34 | fv3 = new TF1(Form("v3_%i", pdg), Form("TMath::Log(x+1)*.1/TMath::Power(%f*%f+x*x,.2)", t->GetMass(), t->GetMass()), 0., 20); |
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35 | if(fQA) { fQApt = new TH1F(Form("pt_%i", fPdg),Form("pt_%i", fPdg),400,0,20); |
| 36 | fQAv2 = new TH2F(Form("v2_%i", fPdg),Form("v2_%i", fPdg),400,0,20, 400, -.5, .5); |
| 37 | fQAv3 = new TH2F(Form("v3_%i", fPdg),Form("v3_%i", fPdg),400,0,20, 400, -.5, .5); } |
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38 | delete t; |
| 39 | } |
| 40 | virtual ~NaiveFlowAndSpectrumGenerator() {if(fpt) delete fpt; if(fv2) delete fv2; if(fv3) delete fv3; if(fQA) {delete fQApt; delete fQAv2; delete fQAv3;};} |
| 41 | Short_t GetPDGCode() const {return fPdg;} |
| 42 | Double_t GetPt() const {double _pt(fpt->GetRandom()); if(fQA) fQApt->Fill(_pt); return _pt;} |
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43 | Double_t GetV2(Double_t pt) const {double _v2(fv2->Eval(pt)); if(fQA&&fFF==0) fQAv2->Fill(pt, _v2); return _v2;} |
| 44 | Double_t GetV3(Double_t pt) const {double _v3(fv3->Eval(pt)); if(fQA&&fFF==0) fQAv3->Fill(pt, _v3); return _v3;} |
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45 | TF1* GetPtSpectrum() const {return fpt;} // return pt fSpectrum |
| 46 | TF1* GetDifferentialV2() const {return fv2;} // return fDifferential v2 |
| 47 | TF1* GetDifferentialV3() const {return fv3;} // return fDifferential v3 |
| 48 | TH1* GetQAType(Int_t t) const { if(t==0) return (TH1*)fQApt; |
| 49 | if(t==1) return (TH1*)fQAv2; |
| 50 | if(t==2) return (TH1*)fQAv3; |
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51 | return 0x0; } // return base pointer to QA histo class |
| 52 | void FillV2(Double_t p, Double_t v) {fQAv2->Fill(p,v);} // fill QA histo in case of fluctuations |
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53 | void SetPtSpectrum(TF1* s) {fpt = s;} // set custom fSpectrum |
| 54 | void SetDifferentialV2(TF1* v2) {fv2 = v2; } // set custom fDifferential v2 |
| 55 | void SetDifferentialV3(TF1* v3) {fv3 = v3; } // set custom fDifferential v3 |
| 56 | private: |
| 57 | Short_t fPdg; // pdg value of track |
| 58 | Bool_t fQA; // make fQA plots for all generated species |
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59 | Int_t fFF; // introduce e-by-e flow fluctuations |
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60 | TF1* fpt; // !pt fSpectrum |
| 61 | TF1* fv2; // !fDifferential v2 |
| 62 | TF1* fv3; // !fDifferential v3 |
| 63 | TH1F* fQApt; // !pt fSpectrum for fQA |
| 64 | TH2F* fQAv2; // !v2 for fQA |
| 65 | TH2F* fQAv3; // !v3 for fQA |
| 66 | NaiveFlowAndSpectrumGenerator(const NaiveFlowAndSpectrumGenerator& dummy); // not implemented |
| 67 | NaiveFlowAndSpectrumGenerator& operator =(const NaiveFlowAndSpectrumGenerator& dummy); // not implemented |
| 68 | }; // end of NaiveFlowAndSpectrumGenerator |
| 69 | // access to some members of the hidden nested class |
| 70 | NaiveFlowAndSpectrumGenerator* Find(Short_t pdg, Bool_t make); |
| 71 | TObjArray* GetGenerators() {return fGenerators; } |
| 72 | void SetPtSpectrum(const char* func, Short_t pdg); |
| 73 | void SetPtDependentV2(const char* func, Short_t pdg); |
| 74 | void SetPtDependentV3(const char* func, Short_t pdg); |
| 75 | TF1* GetPtSpectrum(Short_t pdg) {return Find(pdg, kTRUE)->GetPtSpectrum();} |
| 76 | TF1* GetDifferentialV2(Short_t pdg) {return Find(pdg, kTRUE)->GetDifferentialV2();} |
| 77 | TF1* GetDifferentialV3(Short_t pdg) {return Find(pdg, kTRUE)->GetDifferentialV3();} |
| 78 | TH1* GetQAType(Short_t pdg, Int_t type) {return Find(pdg, kTRUE)->GetQAType(type);} |
| 79 | // event generator |
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80 | void AddV2(TParticle* particle, Double_t v2, Double_t fluc); |
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81 | void AddV2(TClonesArray* event); |
| 82 | void SetAfterBurnerPrecision(Double_t a, Int_t b) { fPrecisionPhi = a; fMaxNumberOfIterations = b; } |
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83 | void GenerateOnTheFlyTracks(Int_t mult, Int_t pid, TClonesArray* event, Double_t fluc); |
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84 | void DecayOnTheFlyTracks(TClonesArray* event); |
| 85 | void ForceGammaDecay(TClonesArray* arr, TParticle* part); |
| 86 | AliFlowEventSimple* GenerateOnTheFlyEvent(TClonesArray* event, Int_t nSpecies, Int_t species[], Int_t mult[], Int_t bg, Bool_t fluc); |
| 87 | void EmbedEvent(TClonesArray* embedMe) {fEmbedMe = embedMe;} |
| 88 | AliFlowEventSimple* ConvertTClonesToFlowEvent(TClonesArray* event, Int_t totalMultiplicity); |
| 89 | void AddV2Mothers(Bool_t b) { fAddV2Mothers = b; } |
| 90 | void AddV3Mothers(Bool_t b) { fAddV3Mothers = b; } |
| 91 | void AddV2Daughters(Bool_t b) { fAddV2Daughters = b; } |
| 92 | void AddV3Daughters(Bool_t b) { fAddV3Daughters = b; } |
| 93 | // 'bookkeeping' |
| 94 | void InitGenerators(); |
| 95 | void PrintGenerators(); |
| 96 | void DoGeneratorQA(Bool_t v2, Bool_t v3); |
| 97 | |
| 98 | private: |
| 99 | // (transient) class members |
| 100 | TObjArray* fGenerators; // array with generators |
| 101 | TClonesArray* fEmbedMe; // tclones array for embedding |
| 102 | AliFlowEventSimple* fFlowEvent; //! flow event simple for output |
| 103 | TVirtualMCDecayer* fDecayer; // virtual decayer, needs to be set in macro |
| 104 | Bool_t fAddV2Mothers; // add v2 to mother tracks |
| 105 | Bool_t fAddV3Mothers; // add v3 to mother tracks |
| 106 | Bool_t fAddV2Daughters; // add v2 to daughter tracks (not implemented) |
| 107 | Bool_t fAddV3Daughters; // add v3 to daughter tracks (not implemented) |
| 108 | Double_t fPsi2; // 2nd order symmetry plane |
| 109 | Double_t fPsi3; // 3rd order symmetry plane (not implemented) |
| 110 | Double_t fPrecisionPhi; // afterburner convergence precision |
| 111 | Int_t fMaxNumberOfIterations; // afterburner convergence precision |
| 112 | Bool_t fQA; // save qa histograms for all generated species |
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113 | Int_t fFF; // introduce e-by-e flow fluctuations |
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114 | // assignment operator and copy constructor |
| 115 | AliFlowOnTheFlyEventGenerator(const AliFlowOnTheFlyEventGenerator& dummy); // not implemented |
| 116 | AliFlowOnTheFlyEventGenerator& operator =(const AliFlowOnTheFlyEventGenerator& dummy); // not implemented |
| 117 | |
| 118 | ClassDef(AliFlowOnTheFlyEventGenerator, 0) |
| 119 | }; |
| 120 | |
| 121 | #endif |
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