Config.C

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//____________________________________________________________________
//
// $Id$
//
// One can use the configuration macro in compiled mode by
// root [0] gSystem->Load("libgeant321");
// root [0] gSystem->SetIncludePath("-I$ROOTSYS/include -I$ALICE_ROOT/include\
//                   -I$ALICE_ROOT -I$ALICE/geant3/TGeant3");
// root [0] .x grun.C(1,"ConfigPPR.C++")
//
//____________________________________________________________________
// 
// Generator types 
//
enum EG_t {
  test50,
  kParam_8000,      //
  kParam_4000,      //
  kParam_2000,      //
  kParam_fmd,     //
  kHijing_cent1,    //
  kHijing_cent2,    //
  kHijing_per1,     //
  kHijing_per2,     //
  kHijing_per3,     //
  kHijing_per4,     //
  kHijing_per5,     //
  kHijing_jj25,     //
  kHijing_jj50,     //
  kHijing_jj75,     //
  kHijing_jj100,    //
  kHijing_jj200,    //
  kHijing_gj25,     //
  kHijing_gj50,     //
  kHijing_gj75,     //
  kHijing_gj100,    //
  kHijing_gj200,    //
  kHijing_pA,     //
  kPythia6,     //
  kPythia6Jets20_24,    //
  kPythia6Jets24_29,    //
  kPythia6Jets29_35,    //
  kPythia6Jets35_42,    //
  kPythia6Jets42_50,    //
  kPythia6Jets50_60,    //
  kPythia6Jets60_72,    //
  kPythia6Jets72_86,    //
  kPythia6Jets86_104,   //
  kPythia6Jets104_125,    //
  kPythia6Jets125_150,    //
  kPythia6Jets150_180,    //
  kD0PbPb5500,      //
  kCharmSemiElPbPb5500,   //
  kBeautySemiElPbPb5500,  //
  kCocktailTRD,     //
  kPyJJ,      //
  kPyGJ,      //
  kMuonCocktailCent1,   //
  kMuonCocktailPer1,    //
  kMuonCocktailPer4,    //
  kMuonCocktailCent1HighPt, //
  kMuonCocktailPer1HighPt,  //
  kMuonCocktailPer4HighPt,  //
  kMuonCocktailCent1Single, //
  kMuonCocktailPer1Single,  //
  kMuonCocktailPer4Single,
  kFMD1Flat, 
  kFMD2Flat, 
  kFMD3Flat,
  kFMDFlat,
  kEgMax
};

//____________________________________________________________________
// 
// Generator types names
//
const char* egName[kEgMax] = {
  "test50",
  "kParam_8000",    //
  "kParam_4000",    //
  "kParam_2000",    //
  "kParam_fmd",     //
  "kHijing_cent1",    //
  "kHijing_cent2",    //
  "kHijing_per1",   //
  "kHijing_per2",   //
  "kHijing_per3",   //
  "kHijing_per4",   //
  "kHijing_per5",   //
  "kHijing_jj25",   //
  "kHijing_jj50",   //
  "kHijing_jj75",   //
  "kHijing_jj100",    //
  "kHijing_jj200",    //
  "kHijing_gj25",   //
  "kHijing_gj50",   //
  "kHijing_gj75",   //
  "kHijing_gj100",    //
  "kHijing_gj200",    //
  "kHijing_pA",     //
  "kPythia6",     //
  "kPythia6Jets20_24",    //
  "kPythia6Jets24_29",    //
  "kPythia6Jets29_35",    //
  "kPythia6Jets35_42",    //
  "kPythia6Jets42_50",    //
  "kPythia6Jets50_60",    //
  "kPythia6Jets60_72",    //
  "kPythia6Jets72_86",    //
  "kPythia6Jets86_104",   //
  "kPythia6Jets104_125",  //
  "kPythia6Jets125_150",  //
  "kPythia6Jets150_180",  //
  "kD0PbPb5500",    //
  "kCharmSemiElPbPb5500", //
  "kBeautySemiElPbPb5500",  //
  "kCocktailTRD",   //
  "kPyJJ",      //
  "kPyGJ",      //
  "kMuonCocktailCent1",   //
  "kMuonCocktailPer1",    //
  "kMuonCocktailPer4",    //
  "kMuonCocktailCent1HighPt", //
  "kMuonCocktailPer1HighPt",  //
  "kMuonCocktailPer4HighPt",  //
  "kMuonCocktailCent1Single", //
  "kMuonCocktailPer1Single",  //
  "kMuonCocktailPer4Single",
  "kFMD1Flat",
  "kFMD2Flat",
  "kFMD3Flat",
  "kFMDFlat"
};

//____________________________________________________________________
enum Geo_t {
  kHoles,     //
  kNoHoles      //
};

//____________________________________________________________________
enum Rad_t {
  kGluonRadiation,    //
  kNoGluonRadiation   //
};

//____________________________________________________________________
enum MC_t {
  kFLUKA, 
  kGEANT3, 
  kGEANT4, 
  kGEANT3TGEO,
};

//____________________________________________________________________
// Functions
Float_t       EtaToTheta(Float_t eta);
EG_t          LookupEG(const Char_t* name);
AliGenerator* GeneratorFactory(EG_t eg, Rad_t rad);
AliGenHijing* HijingStandard();
void          ProcessEnvironmentVars(EG_t& eg, Int_t& seed);

//____________________________________________________________________
void 
Config()
{
  //____________________________________________________________________
  // This part for configuration    
  EG_t  eg   = kPythia6;
  Geo_t geo  = kNoHoles;
  Rad_t rad  = kGluonRadiation;
  AliMagF::BMap_t mag  = AliMagF::k5kG;
  Int_t seed = 12345; //Set 0 to use the current time
  MC_t  mc   = kGEANT3TGEO;
  
  //____________________________________________________________________
  // Get settings from environment variables
  ProcessEnvironmentVars(eg, seed);

  //____________________________________________________________________
  // Set Random Number seed
  gRandom->SetSeed(seed);
  cout<<"Seed for random number generation= "<<gRandom->GetSeed()<<endl; 


  //__________________________________________________________________
  switch (mc) {
  case kFLUKA: 
    // 
    // libraries required by fluka21
    // 
    gSystem->Load("libGeom");
    cout << "\t* Loading TFluka..." << endl;  
    gSystem->Load("libTFluka");    
    gSystem->MakeDirectory("peg");
    // 
    // FLUKA MC
    //
    cout << "\t* Instantiating TFluka..." << endl;
    new TFluka("C++ Interface to Fluka", 0/*verbosity*/);
    break;
  case kGEANT3: 
    {
      //
      // Libraries needed by GEANT 3.21 
      //
      gSystem->Load("$ALICE_ROOT/lib/tgt_$ALICE_TARGET/libpythia6");
      gSystem->Load("libgeant321");
      
      // 
      // GEANT 3.21 MC 
      // 
      TGeant3* gmc = new TGeant3("C++ Interface to Geant3");
      gmc->SetSWIT(4, 1000);
    }
    break;
  case kGEANT3TGEO:
    {
      //
      // Libraries needed by GEANT 3.21 
      //
      gSystem->Load("$ALICE_ROOT/lib/tgt_$ALICE_TARGET/liblhapdf");
      gSystem->Load("$ALICE_ROOT/lib/tgt_$ALICE_TARGET/libpythia6");
      gSystem->Load("libEGPythia6"); //<- For non-debian (sigh!)
      // gSystem->Load("EGPythia6");
      gSystem->Load("libgeant321");
    
      // 
      // GEANT 3.21 MC 
      // 
      TGeant3TGeo* gmc  = new TGeant3TGeo("C++ Interface to Geant3");
      gmc->SetSWIT(4, 1000);
      Printf("Making a TGeant3TGeo objet");
    }
    break;
  default:
    gAlice->Fatal("Config.C", "No MC type chosen");
    return;
  }

  //__________________________________________________________________
  AliRunLoader* rl = 0;

  cout<<"Config.C: Creating Run Loader ..."<<endl;
  rl = AliRunLoader::Open("galice.root",
        AliConfig::GetDefaultEventFolderName(),
        "recreate");
  if (!rl) {
    gAlice->Fatal("Config.C","Can not instatiate the Run Loader");
    return;
  }
  rl->SetCompressionLevel(2);
  rl->SetNumberOfEventsPerFile(3);
  gAlice->SetRunLoader(rl);

  //__________________________________________________________________
  // For FLUKA 
  switch (mc) {
  case kFLUKA: 
    {
      //
      // Use kTRUE as argument to generate alice.pemf first
      //
      TString alice_pemf(gSystem->Which(".", "peg/mat17.pemf"));
      if (!alice_pemf.IsNull()) 
  ((TFluka*)gMC)->SetGeneratePemf(kFALSE);
      else
  ((TFluka*)gMC)->SetGeneratePemf(kTRUE);
      TString flupro(gSystem->Getenv("FLUPRO"));
      if (flupro.IsNull()) 
  Fatal("Config.C", "Environment variable FLUPRO not set");
#if 0
      char* files[] = { "brems_fin.bin", "cohff.bin", "elasct.bin", 
      "gxsect.bin", "nuclear.bin", "sigmapi.bin", 
      0 };
      char* file = files[0];
      while (file) {
  TString which(gSystem->Which(".", file));
  if (which.IsNull()) {
    if (gSystem->Symlink(Form("%s/%s", flupro.Data(), file), file)!=0) 
      Fatal("Config.C", "Couldn't link $(FLUPRO)/%s -> .", file);
  }
  file++;
      }
#endif
      TString neuxsc(gSystem->Which(".", "neuxsc.bin"));
      if (neuxsc.IsNull()) 
  gSystem->Symlink(Form("%s/neuxsc_72.bin", flupro.Data()), 
       "neuxsc.bin"); 
      gSystem->CopyFile("$(FLUPRO)/random.dat", "old.seed", kTRUE);
    }
    break;
  }

  //__________________________________________________________________
  //
  // Set External decayer
#if 0
  AliDecayer *decayer = new AliDecayerPythia();
  switch (eg) {
  case kD0PbPb5500:           decayer->SetForceDecay(kHadronicD);      break;
  case kCharmSemiElPbPb5500:  decayer->SetForceDecay(kSemiElectronic); break;
  case kBeautySemiElPbPb5500: decayer->SetForceDecay(kSemiElectronic); break;
  default:                    decayer->SetForceDecay(kAll);            break;
  }
  decayer->Init();
  gMC->SetExternalDecayer(decayer);
#endif

  //__________________________________________________________________
  // *********** STEERING parameters FOR ALICE SIMULATION ************
  // - Specify event type to be tracked through the ALICE setup
  // - All positions are in cm, angles in degrees, and P and E in GeV 
  gMC->SetProcess("DCAY",1);
  gMC->SetProcess("PAIR",1);
  gMC->SetProcess("COMP",1);
  gMC->SetProcess("PHOT",1);
  gMC->SetProcess("PFIS",0);
  gMC->SetProcess("DRAY",0);
  gMC->SetProcess("ANNI",1);
  gMC->SetProcess("BREM",1);
  gMC->SetProcess("MUNU",1);
  gMC->SetProcess("CKOV",1);
  gMC->SetProcess("HADR",1);
  gMC->SetProcess("LOSS",1); // 0:none 1,3:dray 2:nodray 4:nofluct (def:2)
  gMC->SetProcess("MULS",1);
  gMC->SetProcess("RAYL",1);

  Float_t cut = 1.e-3;        // 1MeV cut by default
  Float_t tofmax = 1.e10;

  gMC->SetCut("CUTGAM", cut);
  gMC->SetCut("CUTELE", cut);
  gMC->SetCut("CUTNEU", cut);
  gMC->SetCut("CUTHAD", cut);
  gMC->SetCut("CUTMUO", cut);
  gMC->SetCut("BCUTE",  cut); 
  gMC->SetCut("BCUTM",  cut); 
  gMC->SetCut("DCUTE",  cut); 
  gMC->SetCut("DCUTM",  cut); 
  gMC->SetCut("PPCUTM", cut);
  gMC->SetCut("TOFMAX", tofmax); 

  
  //__________________________________________________________________
  // Generator Configuration
  AliGenerator* gener = GeneratorFactory(eg, rad);
  gener->SetOrigin(0, 0, 0);    // vertex position
  gener->SetSigma(0, 0, 5.3);   // Sigma in (X,Y,Z) (cm) on IP position
  gener->SetCutVertexZ(1.);     // Truncate at 1 sigma
  gener->SetVertexSmear(kPerEvent); 
  gener->SetTrackingFlag(1);
  gener->Init();
    
  //__________________________________________________________________
  // Field (L3 0.4 T)
  AliMagF* field = new AliMagF("Maps","Maps",-1., -1., mag);
  TGeoGlobalMagField::Instance()->SetField(field);

  rl->CdGAFile();

  TFile* magF = TFile::Open("mag.root", "RECREATE");
  field->Write("mag");
  magF->Close();

  //__________________________________________________________________
  // 
  // Used detectors 
  // 
  Bool_t useABSO  = kFALSE; 
  Bool_t useACORDE= kFALSE; 
  Bool_t useDIPO  = kFALSE; 
  Bool_t useFMD   = kTRUE; 
  Bool_t useFRAME = kFALSE; 
  Bool_t useHALL  = kFALSE; 
  Bool_t useITS   = kTRUE;
  Bool_t useMAG   = kFALSE; 
  Bool_t useMUON  = kFALSE; 
  Bool_t usePHOS  = kFALSE; 
  Bool_t usePIPE  = kTRUE; 
  Bool_t usePMD   = kFALSE; 
  Bool_t useHMPID = kFALSE; 
  Bool_t useSHIL  = kFALSE; 
  Bool_t useT0    = kTRUE; 
  Bool_t useTOF   = kFALSE; 
  Bool_t useTPC   = kFALSE;
  Bool_t useTRD   = kFALSE; 
  Bool_t useZDC   = kFALSE; 
  Bool_t useEMCAL = kFALSE; 
  Bool_t useVZERO = kTRUE;

  cout << "\t* Creating the detectors ..." << endl;
  // ================= Alice BODY parameters =========================
  AliBODY *BODY = new AliBODY("BODY", "Alice envelop");
  
  
  if (useMAG)   AliMAG  *MAG  = new AliMAG("MAG", "Magnet");
  if (useABSO)  AliABSO *ABSO = new AliABSOv3("ABSO", "Muon Absorber");
  if (useDIPO)  AliDIPO *DIPO = new AliDIPOv3("DIPO", "Dipole version 3");
  if (useHALL)  AliHALL *HALL = new AliHALLv3("HALL", "Alice Hall");
  if (useFRAME) {
    AliFRAMEv2 *FRAME = new AliFRAMEv2("FRAME", "Space Frame");
    switch (geo) {
    case kHoles: FRAME->SetHoles(1); break;
    default:     FRAME->SetHoles(0); break;
    }
  }
  if (useSHIL)   AliSHIL   *SHIL   = new AliSHILv3("SHIL", "Shielding v3");
  if (usePIPE)   AliPIPE   *PIPE   = new AliPIPEv3("PIPE", "Beam Pipe");
  if (useITS)    AliITS    *ITS    = new AliITSv11("ITS","ITS v11");
  if (useTPC)    AliTPC    *TPC    = new AliTPCv2("TPC", "Default");
  if (useTOF)    AliTOF    *TOF    = new AliTOFv6T0("TOF", "normal TOF");
  if (useHMPID)  AliHMPID  *HMPID  = new AliHMPIDv1("HMPID", "normal HMPID");
  if (useZDC)    AliZDC    *ZDC    = new AliZDCv3("ZDC", "normal ZDC");
  if (useTRD)    AliTRD    *TRD    = new AliTRDv1("TRD", "TRD slow simulator");
  if (useFMD)    AliFMD    *FMD    = new AliFMDv1("FMD", "normal FMD");
  if (useMUON)   AliMUON   *MUON   = new AliMUONv1("MUON", "default");
  if (usePHOS)   AliPHOS   *PHOS   = new AliPHOSv1("PHOS", "IHEP");
  if (usePMD)    AliPMD    *PMD    = new AliPMDv1("PMD", "normal PMD");
  if (useT0)     AliT0     *T0     = new AliT0v1("T0", "T0 Detector");
  if (useEMCAL)  AliEMCAL  *EMCAL  = new AliEMCALv2("EMCAL", "EMCAL_COMPLETEV1");
  if (useACORDE) AliACORDE *ACORDE = new AliACORDEv1("ACORDE", "normal ACORDE");
  if (useVZERO)  AliVZERO  *VZERO  = new AliVZEROv7("VZERO", "normal VZERO");
}

//____________________________________________________________________
Float_t EtaToTheta(Float_t arg)
{
  return (180./TMath::Pi())*2.*TMath::ATan(TMath::Exp(-arg));
}

//____________________________________________________________________
Int_t 
LookupEG(const Char_t* name) 
{
  TString n(name);
  for (Int_t i = 0; i < kEgMax; i++) {
    if (n == egName[i]) return i;
  }
  return -1;
}

//____________________________________________________________________  
AliGenerator* 
GeneratorFactory(EG_t eg, Rad_t rad)  
{
  Int_t isw = 3;
  if (rad == kNoGluonRadiation) isw = 0;
  
  // Possibly load libAliPythia6
  switch (eg) {
  case kPythia6:
  case kPythia6Jets20_24:
  case kPythia6Jets24_29:
  case kPythia6Jets29_35:
  case kPythia6Jets35_42:
  case kPythia6Jets42_50:
  case kPythia6Jets50_60:
  case kPythia6Jets60_72:
  case kPythia6Jets72_86:
  case kPythia6Jets86_104:
  case kPythia6Jets104_125:
  case kPythia6Jets125_150:
  case kPythia6Jets150_180:
    gSystem->Load("liblhapdf");
    // gSystem->Load("/usr/lib/libpythia");
    // gSystem->ListLibraries();
    gSystem->Load("EGPythia6");
    gSystem->Load("libAliPythia6");
    break;
  }
  
  AliGenerator * gGener = 0;
  switch (eg) {
  case test50:
    {
      AliGenHIJINGpara *gener = new AliGenHIJINGpara(50);
      gener->SetMomentumRange(0, 999999.);
      gener->SetPhiRange(0., 360.);
      // Set pseudorapidity range from -8 to 8.
      Float_t thmin = EtaToTheta(8);   // theta min. <---> eta max
      Float_t thmax = EtaToTheta(-8);  // theta max. <---> eta min 
      gener->SetThetaRange(thmin,thmax);
      gGener=gener;
    }
    break;
  case kParam_8000:
    {
      AliGenHIJINGpara *gener = new AliGenHIJINGpara(86030);
      gener->SetMomentumRange(0, 999999.);
      gener->SetPhiRange(0., 360.);
      // Set pseudorapidity range from -8 to 8.
      Float_t thmin = EtaToTheta(8);   // theta min. <---> eta max
      Float_t thmax = EtaToTheta(-8);  // theta max. <---> eta min 
      gener->SetThetaRange(thmin,thmax);
      gGener=gener;
    }
    break;
  case kParam_4000:
    {
      AliGenHIJINGpara *gener = new AliGenHIJINGpara(43015);
      gener->SetMomentumRange(0, 999999.);
      gener->SetPhiRange(0., 360.);
      // Set pseudorapidity range from -8 to 8.
      Float_t thmin = EtaToTheta(8);   // theta min. <---> eta max
      Float_t thmax = EtaToTheta(-8);  // theta max. <---> eta min 
      gener->SetThetaRange(thmin,thmax);
      gGener=gener;
    }
    break;
  case kParam_2000:
    {
      AliGenHIJINGpara *gener = new AliGenHIJINGpara(21507);
      gener->SetMomentumRange(0, 999999.);
      gener->SetPhiRange(0., 360.);
      // Set pseudorapidity range from -8 to 8.
      Float_t thmin = EtaToTheta(8);   // theta min. <---> eta max
      Float_t thmax = EtaToTheta(-8);  // theta max. <---> eta min 
      gener->SetThetaRange(thmin,thmax);
      gGener=gener;
    }
    break;
  case kParam_fmd:
    {
      AliGenHIJINGpara *gener = new AliGenHIJINGpara(500);
      gener->SetMomentumRange(0, 999999.);
      gener->SetPhiRange(0., 360.);
      // Set pseudorapidity range from -8 to 8.
      Float_t thmin = EtaToTheta(6);   // theta min. <---> eta max
      Float_t thmax = EtaToTheta(2);  // theta max. <---> eta min 
      gener->SetThetaRange(thmin,thmax);
      gGener=gener;
    }
    break;
    //
    //  Hijing Central
    //
  case kHijing_cent1:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      gGener=gener;
    }
    break;
  case kHijing_cent2:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 2.);
      gGener=gener;
    }
    break;
    //
    // Hijing Peripheral 
    //
  case kHijing_per1:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(5., 8.6);
      gGener=gener;
    }
    break;
  case kHijing_per2:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(8.6, 11.2);
      gGener=gener;
    }
    break;
  case kHijing_per3:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(11.2, 13.2);
      gGener=gener;
    }
    break;
  case kHijing_per4:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(13.2, 15.);
      gGener=gener;
    }
    break;
  case kHijing_per5:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(15., 100.);
      gGener=gener;
    }
    break;
    //
    //  Jet-Jet
    //
  case kHijing_jj25:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(1);
      gener->SetPtJet(25.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.3,0.3);
      gener->SetJetPhiRange(75., 165.);   
      gGener=gener;
    }
    break;

  case kHijing_jj50:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(1);
      gener->SetPtJet(50.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.3,0.3);
      gener->SetJetPhiRange(75., 165.);   
      gGener=gener;
    }
    break;

  case kHijing_jj75:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(1);
      gener->SetPtJet(75.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.3,0.3);
      gener->SetJetPhiRange(75., 165.);   
      gGener=gener;
    }
    break;

  case kHijing_jj100:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(1);
      gener->SetPtJet(100.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.3,0.3);
      gener->SetJetPhiRange(75., 165.);   
      gGener=gener;
    }
    break;

  case kHijing_jj200:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(1);
      gener->SetPtJet(200.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.3,0.3);
      gener->SetJetPhiRange(75., 165.);   
      gGener=gener;
    }
    break;
    //
    // Gamma-Jet
    //
  case kHijing_gj25:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(2);
      gener->SetPtJet(25.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.12, 0.12);
      gener->SetJetPhiRange(220., 320.);
      gGener=gener;
    }
    break;

  case kHijing_gj50:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(2);
      gener->SetPtJet(50.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.12, 0.12);
      gener->SetJetPhiRange(220., 320.);
      gGener=gener;
    }
    break;

  case kHijing_gj75:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(2);
      gener->SetPtJet(75.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.12, 0.12);
      gener->SetJetPhiRange(220., 320.);
      gGener=gener;
    }
    break;

  case kHijing_gj100:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(2);
      gener->SetPtJet(100.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.12, 0.12);
      gener->SetJetPhiRange(220., 320.);
      gGener=gener;
    }
    break;

  case kHijing_gj200:
    {
      AliGenHijing *gener = HijingStandard();
      // impact parameter range
      gener->SetImpactParameterRange(0., 5.);
      // trigger
      gener->SetTrigger(2);
      gener->SetPtJet(200.);
      gener->SetRadiation(isw);
      gener->SetSimpleJets(!isw);
      gener->SetJetEtaRange(-0.12, 0.12);
      gener->SetJetPhiRange(220., 320.);
      gGener=gener;
    }
    break;
  case kHijing_pA:
    {

      AliGenCocktail *gener  = new AliGenCocktail();

      AliGenHijing   *hijing = new AliGenHijing(-1);
      // centre of mass energy 
      hijing->SetEnergyCMS(TMath::Sqrt(82./208.) * 14000.);
      // impact parameter range
      hijing->SetImpactParameterRange(0., 15.);
      // reference frame
      hijing->SetReferenceFrame("CMS");
      hijing->SetBoostLHC(1);
      // projectile
      hijing->SetProjectile("P", 1, 1);
      hijing->SetTarget    ("A", 208, 82);
      // tell hijing to keep the full parent child chain
      hijing->KeepFullEvent();
      // enable jet quenching
      hijing->SetJetQuenching(0);
      // enable shadowing
      hijing->SetShadowing(1);
      // Don't track spectators
      hijing->SetSpectators(0);
      // kinematic selection
      hijing->SetSelectAll(0);
      //
      AliGenSlowNucleons*  gray    = new AliGenSlowNucleons(1);
      AliSlowNucleonModel* model   = new AliSlowNucleonModelExp();
      gray->SetSlowNucleonModel(model);
      gray->SetDebug(1);
      gener->AddGenerator(hijing,"Hijing pPb", 1);
      gener->AddGenerator(gray,  "Gray Particles",1);
      gGener=gener;
    }
    break;
  case kPythia6:
    {
      AliGenPythia *gener = new AliGenPythia(-1); 
      gener->SetMomentumRange(0,999999);
      gener->SetThetaRange(0., 180.);
      gener->SetYRange(-12,12);
      gener->SetPtRange(0,1000);
      gener->SetProcess(kPyMb);
      gener->SetEnergyCMS(14000.);
      gGener=gener;
    }
    break;
  case kPythia6Jets20_24:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(20., 24.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets24_29:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(24., 29.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets29_35:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(29., 35.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets35_42:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(35., 42.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets42_50:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(42., 50.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets50_60:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(50., 60.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets60_72:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(60., 72.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets72_86:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(72., 86.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets86_104:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(86., 104.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets104_125:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(104., 125.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets125_150:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(125., 150.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kPythia6Jets150_180:
    {
      AliGenPythia * gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);//        Centre of mass energy
      gener->SetProcess(kPyJets);//        Process type
      gener->SetJetEtaRange(-0.5, 0.5);//  Final state kinematic cuts
      gener->SetJetPhiRange(0., 360.);
      gener->SetJetEtRange(10., 1000.);
      gener->SetGluonRadiation(1,1);
      //    gener->SetPtKick(0.);
      //   Structure function
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(150., 180.);// Pt transfer of the hard scattering
      gener->SetPycellParameters(2., 274, 432, 0., 4., 5., 1.0);
      gener->SetForceDecay(kAll);//  Decay type (semielectronic, etc.)
      gGener=gener;
    }
    break;
  case kD0PbPb5500:
    {
      AliGenPythia * gener = new AliGenPythia(10);
      gener->SetProcess(kPyD0PbPbMNR);
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(2.1,-1.0);
      gener->SetEnergyCMS(5500.);
      gener->SetNuclei(208,208);
      gener->SetForceDecay(kHadronicD);
      gener->SetYRange(-2,2);
      gener->SetFeedDownHigherFamily(kFALSE);
      gener->SetStackFillOpt(AliGenPythia::kParentSelection);
      gener->SetCountMode(AliGenPythia::kCountParents);
      gGener=gener;
    }
    break;
  case kCharmSemiElPbPb5500:
    {
      AliGenPythia * gener = new AliGenPythia(10);
      gener->SetProcess(kPyCharmPbPbMNR);
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(2.1,-1.0);
      gener->SetEnergyCMS(5500.);
      gener->SetNuclei(208,208);
      gener->SetForceDecay(kSemiElectronic);
      gener->SetYRange(-2,2);
      gener->SetFeedDownHigherFamily(kFALSE);
      gener->SetCountMode(AliGenPythia::kCountParents);
      gGener=gener;
    }
    break;
  case kBeautySemiElPbPb5500:
    {
      AliGenPythia *gener = new AliGenPythia(10);
      gener->SetProcess(kPyBeautyPbPbMNR);
      gener->SetStrucFunc(kCTEQ4L);
      gener->SetPtHard(2.75,-1.0);
      gener->SetEnergyCMS(5500.);
      gener->SetNuclei(208,208);
      gener->SetForceDecay(kSemiElectronic);
      gener->SetYRange(-2,2);
      gener->SetFeedDownHigherFamily(kFALSE);
      gener->SetCountMode(AliGenPythia::kCountParents);
      gGener=gener;
    }
    break;
  case kCocktailTRD:
    {
      AliGenCocktail *gener  = new AliGenCocktail();

      AliGenParam *jpsi = new AliGenParam(10,
            new AliGenMUONlib(),
            AliGenMUONlib::kJpsiFamily,
            "Vogt PbPb");

      jpsi->SetPtRange(0, 100);
      jpsi->SetYRange(-1., +1.);
      jpsi->SetForceDecay(kDiElectron);

      AliGenParam *ups = new AliGenParam(10,
           new AliGenMUONlib(),
           AliGenMUONlib::kUpsilonFamily,
           "Vogt PbPb");
      ups->SetPtRange(0, 100);
      ups->SetYRange(-1., +1.);
      ups->SetForceDecay(kDiElectron);
  
      AliGenParam *charm = new AliGenParam(10,
             new AliGenMUONlib(), 
             AliGenMUONlib::kCharm,
             "central");
      charm->SetPtRange(0, 100);
      charm->SetYRange(-1.5, +1.5);
      charm->SetForceDecay(kSemiElectronic);
  
  
      AliGenParam *beauty = new AliGenParam(10,
              new AliGenMUONlib(), 
              AliGenMUONlib::kBeauty,
              "central");
      beauty->SetPtRange(0, 100);
      beauty->SetYRange(-1.5, +1.5);
      beauty->SetForceDecay(kSemiElectronic);

      gener->AddGenerator(jpsi,"J/psi",1);
      gener->AddGenerator(ups,"Upsilon",1);
      gener->AddGenerator(charm,"Charm",1);
      gener->AddGenerator(beauty,"Beauty",1);
      gGener=gener;
    }
    break;
  case kPyJJ:
    {
      AliGenPythia *gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);
      gener->SetProcess(kPyJets);
      Double_t ptHardMin=10.0, ptHardMax=-1.0;
      gener->SetPtHard(ptHardMin,ptHardMax);
      gener->SetYHard(-0.7,0.7);
      gener->SetJetEtaRange(-0.2,0.2);
      gener->SetEventListRange(0,1);
      gGener=gener;
    }
    break;
  case kPyGJ:
    {
      AliGenPythia *gener = new AliGenPythia(-1);
      gener->SetEnergyCMS(5500.);
      gener->SetProcess(kPyDirectGamma);
      Double_t ptHardMin=10.0, ptHardMax=-1.0;
      gener->SetPtHard(ptHardMin,ptHardMax);
      gener->SetYHard(-1.0,1.0);
      gener->SetGammaEtaRange(-0.13,0.13);
      gener->SetGammaPhiRange(210.,330.);
      gener->SetEventListRange(0,1);
      gGener=gener;
    }
    break;
  case kMuonCocktailCent1:
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(0.8);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(2);
      gener->SetNumberOfCollisions(1626.);  //Centrality class Cent1 for PDC04
      gener->SetNumberOfParticipants(359.4);//Centrality class Cent1 for PDC04
      gGener=gener;
    }
    break;
  case kMuonCocktailPer1:
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(0.8);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(2);
      gener->SetNumberOfCollisions(820.0);//Centrality class Per1 for PDC04
      gener->SetNumberOfParticipants(229.3);//Centrality class Per1 for PDC04
      gGener=gener;
    }
    break;
  case kMuonCocktailPer4:
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(0.8);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(2);
      gener->SetNumberOfCollisions(13.6);//Centrality class Per4 for PDC04
      gener->SetNumberOfParticipants(13.3);//Centrality class Per4 for PDC04
      gGener=gener;
    }
    break;
  case kMuonCocktailCent1HighPt:
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(2.5);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(2);
      gener->SetNumberOfCollisions(1626.);  //Centrality class Cent1 for PDC04
      gener->SetNumberOfParticipants(359.4);//Centrality class Cent1 for PDC04
      gGener=gener;
    }
    break;
  case kMuonCocktailPer1HighPt :
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(2.5);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(2);
      gener->SetNumberOfCollisions(820.0);//Centrality class Per1 for PDC04
      gener->SetNumberOfParticipants(229.3);//Centrality class Per1 for PDC04
      gGener=gener;
    }
    break;
  case kMuonCocktailPer4HighPt:
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(2.5);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(2);
      gener->SetNumberOfCollisions(13.6);//Centrality class Per4 for PDC04
      gener->SetNumberOfParticipants(13.3);//Centrality class Per4 for PDC04
      gGener=gener;
    }
    break;
  case kMuonCocktailCent1Single:
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(0.8);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(1);
      gener->SetNumberOfCollisions(1626.);  //Centrality class Cent1 for PDC04
      gener->SetNumberOfParticipants(359.4);//Centrality class Cent1 for PDC04
      gGener=gener;
    }
    break;
  case kMuonCocktailPer1Single :
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(0.8);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(1);
      gener->SetNumberOfCollisions(820.0);//Centrality class Per1 for PDC04
      gener->SetNumberOfParticipants(229.3);//Centrality class Per1 for PDC04
      gGener=gener;
    }
    break;
  case kMuonCocktailPer4Single:
    {
      AliGenMUONCocktail * gener = new AliGenMUONCocktail();
      gener->SetPtRange(1.0,100.);       // Transverse momentum range   
      gener->SetPhiRange(0.,360.);    // Azimuthal angle range  
      gener->SetYRange(-4.0,-2.4);
      gener->SetMuonPtCut(0.8);
      gener->SetMuonThetaCut(171.,178.);
      gener->SetMuonMultiplicity(1);
      gener->SetNumberOfCollisions(13.6);//Centrality class Per4 for PDC04
      gener->SetNumberOfParticipants(13.3);//Centrality class Per4 for PDC04
      gGener=gener;
    }
    break;
  case kFMD1Flat: 
    {
      AliGenBox* gener = new AliGenBox(2000);
      gener->SetPart(kPiPlus);
      gener->SetMomentumRange(3,4);
      gener->SetPhiRange(0, 360);
      gener->SetThetaRange(0.77, 3.08);
      gGener = gener;
    }
    break;
  case kFMD2Flat: 
    {
      AliGenBox* gener = new AliGenBox(100);
      gener->SetPart(kPiPlus);
      gener->SetMomentumRange(3,4);
      gener->SetPhiRange(0, 360);
      gener->SetThetaRange(2.95, 20.42);
      gGener = gener;
    }
    break;
  case kFMD3Flat: 
    {
      AliGenBox* gener = new AliGenBox(2000);
      gener->SetPart(kPiPlus);
      gener->SetMomentumRange(3,4);
      gener->SetPhiRange(0, 360);
      gener->SetThetaRange(155.97, 176.73);
      gGener = gener;
    }
    break;
  case kFMDFlat:
    {
      AliGenCocktail* gener = new AliGenCocktail();
      gener->SetMomentumRange(3,4);
      gener->SetPhiRange(0, 360);
      AliGenBox* gener3 = new AliGenBox(2000);
      gener3->SetThetaRange(155.97, 176.73);
      gener3->SetPart(kPiPlus);
      gener->AddGenerator(gener3, "FMD3", .33);
      AliGenBox* gener2 = new AliGenBox(2000);
      gener2->SetThetaRange(2.95, 20.42);
      gener2->SetPart(kPiPlus);
      gener->AddGenerator(gener2, "FMD2", .33);
      AliGenBox* gener1 = new AliGenBox(2000);
      gener1->SetThetaRange(0.77, 3.08);
      gener1->SetPart(kPiPlus);
      gener->AddGenerator(gener1, "FMD1", .34);
      gGener = gener;
    }
    break;
    
  default: break;
  }
  return gGener;
}

//____________________________________________________________________
AliGenHijing* 
HijingStandard()
{
  AliGenHijing *gener = new AliGenHijing(-1);
  // centre of mass energy 
  gener->SetEnergyCMS(5500.);
  // reference frame
  gener->SetReferenceFrame("CMS");
  // projectile
  gener->SetProjectile("A", 208, 82);
  gener->SetTarget    ("A", 208, 82);
  // tell hijing to keep the full parent child chain
  gener->KeepFullEvent();
  // enable jet quenching
  gener->SetJetQuenching(1);
  // enable shadowing
  gener->SetShadowing(1);
  // neutral pion and heavy particle decays switched off
  gener->SetDecaysOff(1);
  // Don't track spectators
  gener->SetSpectators(0);
  // kinematic selection
  gener->SetSelectAll(0);
  return gener;
}


//____________________________________________________________________
void 
ProcessEnvironmentVars(EG_t& eg, Int_t& seed)
{
  // Run type
  if (gSystem->Getenv("CONFIG_RUN_TYPE")) {
    Int_t eg1 = LookupEG(gSystem->Getenv("CONFIG_RUN_TYPE"));
    if  (eg1 >= 0) eg = EG_t(eg1);
  }
  // Random Number seed
  if (gSystem->Getenv("CONFIG_SEED")) {
    seed = atoi(gSystem->Getenv("CONFIG_SEED"));
  }
}

//____________________________________________________________________
//
// EOF
//