remove unused code
[u/mrichter/AliRoot.git] / MUON / fastMUONGen.C
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9c090011 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
6 * *
7 * Permission to use, copy, modify and distribute this software and its *
8 * documentation strictly for non-commercial purposes is hereby granted *
9 * without fee, provided that the above copyright notice appears in all *
10 * copies and that both the copyright notice and this permission notice *
11 * appear in the supporting documentation. The authors make no claims *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
e54bf126 16/* $Id$ */
9c090011 17
e54bf126 18/// \ingroup macros
19/// \file fastMUONGen.C
20/// \brief An example how to use the AliGenMUONCocktailpp generator
21/// without GEANT simulation of the detector
22///
23/// \author H. Woehri, A. De Falco, INFN Cagliari, April 2007
24///
25/// The macro switches on all decay modes for the resonances,
26/// while for the minimum bias Pythia event we additionally
27/// switch on the muonic decays of pions and Kaons
28/// Its outcome can be further processed by the macro
29/// fastMUONSim.C
9c090011 30
31#if !defined(__CINT__) || defined(__MAKECINT__)
32#include "AliGenerator.h"
33#include "AliRunLoader.h"
34#include "AliRun.h"
35#include "AliHeader.h"
36#include "AliStack.h"
37#include "AliGenCocktail.h"
38#include "AliDecayerPythia.h"
39#include "AliPDG.h"
40#include "AliGenMUONCocktailpp.h"
41
42#include "TParticle.h"
43#endif
44
45AliGenerator* CreateGeneratorMC(Int_t mult);
46Int_t SetupOutputDirectory();
47
e54bf126 48/// The third argument \em mult allows to select at a "pre-trigger" level
49/// events with "mult" muons in the MUON detector's phase space
50/// window, which is defined in the method "CreateGeneratorMC(Int_t mult)".
51/// Note that in this routine also a cut on the muon's origin
52/// should be placed in order not to trigger on muons from pi/K decays
53/// that were decayed by Pythia way inside the absorber or in the muon
54/// spectrometer itself
9c090011 55void fastMUONGen(Int_t nev = 1, char* filename = "galice.root", Int_t mult = 2)
56{
57 Int_t runNumber = SetupOutputDirectory();
58 gAlice->SetRunNumber(runNumber);
59 printf("\n\n\n\nsetting run number to %d\n\n\n\n", runNumber);
60
61 // Update data base
62 AliPDG::AddParticlesToPdgDataBase();
63 //
64 AliRunLoader* rl = AliRunLoader::Open(filename,"FASTRUN","recreate");
65 rl->SetCompressionLevel(2);
66 rl->SetNumberOfEventsPerFile(10000);
67 rl->LoadKinematics("RECREATE");
68 rl->MakeTree("E");
69 gAlice->SetRunLoader(rl);
70 //
71 rl->MakeStack();
72 AliStack* stack = rl->Stack();
73 AliHeader* header = rl->GetHeader();
74 //
75 // Create and Initialize Generator
76 AliGenerator *gener = CreateGeneratorMC(mult);
77 gener->SetStack(stack);
78 gener->Init();
79 //
80 for (int iev = 0; iev < nev; iev++) {
81
82 if(iev%1000 == 0) printf("Event %d\n", iev);
83 // Initialize event
84 header->Reset(0,iev);
85 rl->SetEventNumber(iev);
86 stack->Reset();
87 rl->MakeTree("K");
88
89 gener->Generate();
90/*
91 // Printing
92 Int_t npart = stack->GetNprimary();
93 for (Int_t part=0; part<npart; part++) {
94 TParticle *MPart = stack->Particle(part);
95 Int_t mpart = MPart->GetPdgCode();
96 printf("Particle %5d %5d %5d\n", part, mpart, MPart->GetFirstMother());
97 }
98*/
99
100 // Finish event
101 header->SetNprimary(stack->GetNprimary());
102 header->SetNtrack(stack->GetNtrack());
103 // I/O
104 //
105 stack->FinishEvent();
106 header->SetStack(stack);
107 rl->TreeE()->Fill();
108 rl->WriteKinematics("OVERWRITE");
109 } // event loop
110
111 gener->FinishRun();
9c090011 112 rl->WriteHeader("OVERWRITE");
113 gener->Write();
114 rl->Write();
115}
116//===============================================
117AliGenerator* CreateGeneratorMC(Int_t mult)
118{
119 AliGenMUONCocktailpp* gener = new AliGenMUONCocktailpp();
120 gener->SetPtRange(0.,100.);
121 gener->SetYRange(-4.,-2.4);
122 gener->SetPhiRange(0., 360.);
123 gener->SetMuonMultiplicity(mult);
124 gener->SetMuonPtCut(0.5);
125 gener->SetMuonThetaRange(171.,178.);
126 gener->SetOrigin(0.,0.,0.);
127 gener->SetSigma(0.,0.,5.);
128 gener->SetVertexSmear(kPerEvent);
129 //for resonances: "kAll" all decay modes are openend
130 gener->SetDecayModeResonance(kAll);
131 //for MC Pythia events: all decays, including muonic decays from pion and Kaons are opened
132 gener->SetDecayModePythia(kAllMuonic);
133 gener->SetMuonOriginCut(-130.); //prevent the trigger muon(s) from decaying after 130 cm
134 AliDecayerPythia* decayer = new AliDecayerPythia();
135 gener->SetDecayer(decayer);
136 return gener;
137}
138//===============================================
139Int_t SetupOutputDirectory(){
140
141 //Setting up the name for the output directory:
142 static Int_t sseed = 0; // Set 0 to use the current time
143 gRandom->SetSeed(sseed);
144 UInt_t theSeed = gRandom->GetSeed();
145 Int_t labIndex = 5; //1 subatech, 2 clermont, 3 Torino, 4 Orsay
146 // 5 Cagliari, etc...
147 Int_t runNumber = (theSeed%100000000 + 100000000*labIndex);
148
149 Char_t name[100];
150 sprintf(name, "touch run_%d", runNumber);
151 gSystem->Exec(name);
152
153 return runNumber;
154}