g4simulation/g4decayer/EvtGenExtDecayerPhysics.cc

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0025 //
0026 // $Id: EvtGenExtDecayerPhysics.cc, 2022/08/09 23:49:39 mccumber Exp $
0027 //
0028 /// \file derived from eventgenerator/pythia/decayer6/src/P6DExtDecayerPhysics.cc
0029 /// \brief Implementation of the EvtGenExtDecayerPhysics class
0030 ///
0031 /// \author Zhaozhong Shi; LANL, Los Alamos
0032
0033 #include "EvtGenExtDecayerPhysics.hh"
0034
0035 #include <Geant4/G4Decay.hh>
0036 #include <Geant4/G4ParticleDefinition.hh>
0037 #include <Geant4/G4ParticleTable.hh>  // for G4ParticleTable::G4PTblDi...
0038 #include <Geant4/G4ProcessManager.hh>
0039 #include <Geant4/G4ProcessVector.hh>  // for G4ProcessVector
0040 #include <Geant4/G4String.hh>         // for G4String
0041 #include <Geant4/G4VPhysicsConstructor.hh>
0042 #include <Geant4/G4VProcess.hh>  // for G4VProcess
0043 #include <Geant4/G4Version.hh>
0044
0045 #include <boost/io/ios_state.hpp>
0046
0047 #include <cstddef>  // for size_t
0048 #include <fstream>
0049 #include <iostream>  // for operator<<, endl, basic_o...
0050 #include <string>    // for operator<<
0051
0052 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0053 // hack for Geant 10.03.p03
0054 // Geant 10.02.p02 has this defined
0055 #ifndef aParticleIterator
0056 #define aParticleIterator ((subInstanceManager.offset[g4vpcInstanceID])._aParticleIterator)
0057 #endif
0058
0059 EvtGenExtDecayerPhysics::EvtGenExtDecayerPhysics(const G4String& name)
0060   : G4VPhysicsConstructor(name)
0061 {
0062   /// Standard constructor
0063 }
0064
0065 //
0066 // protected methods
0067 //
0068
0069 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0070
0071 void EvtGenExtDecayerPhysics::ConstructProcess()
0072 {
0073   // EvtGen model initialization changed the behavior of std::cout float print. Recover the default float print format
0074   boost::io::ios_all_saver ias_cout(std::cout);
0075   boost::io::ios_all_saver ias_cerr(std::cerr);
0076
0077   /// Loop over all particles instantiated and add external decayer
0078   /// to all decay processes if External decayer is set
0079
0080   // Create Geant4 external decayer
0081   extDecayer = new G4EvtGenDecayer();
0082   extDecayer->SetVerboseLevel(0);
0083
0084   if (!DecayFile.empty())
0085   {
0086     std::ifstream f_local(DecayFile);
0087
0088     if (f_local.good())
0089     {
0090       extDecayer->SetDecayTable(DecayFile, false);
0091     }
0092     else
0093     {
0094       const char* CALIBRATIONROOT = getenv("CALIBRATIONROOT");
0095       if (!CALIBRATIONROOT)
0096       {
0097         exit(1);
0098       }
0099       std::string DecayFileCalibrationRepo = std::string(CALIBRATIONROOT) + "/EvtGen/" + DecayFile;
0100
0101       std::ifstream f_calib(DecayFileCalibrationRepo);
0102
0103       if (f_calib.good())
0104       {
0105         extDecayer->SetDecayTable(DecayFileCalibrationRepo, false);
0106       }
0107       else
0108       {
0109         std::cout << __PRETTY_FUNCTION__ << " : Fatal error. Decay file can not be found at "
0110                   << DecayFile << " nor at " << DecayFileCalibrationRepo << std::endl;
0111
0112         exit(1);
0113       }
0114     }
0115   }
0116
0117   aParticleIterator->reset();
0118   int decayer_used = 0;
0119   while ((*aParticleIterator)())
0120   {
0121     G4ParticleDefinition* particle = aParticleIterator->value();
0122     G4ProcessManager* pmanager = particle->GetProcessManager();
0123
0124     if (verboseLevel > 1)
0125     {
0126       std::cout << "Setting ext decayer for: "
0127                 << aParticleIterator->value()->GetParticleName()
0128                 << std::endl;
0129     }
0130
0131     G4ProcessVector* processVector = pmanager->GetProcessList();
0132 #if G4VERSION_NUMBER >= 1060
0133     for (size_t i = 0; i < processVector->length(); i++)
0134 #else
0135     for (G4int i = 0; i < processVector->length(); i++)
0136 #endif
0137     {
0138       G4Decay* decay = dynamic_cast<G4Decay*>((*processVector)[i]);
0139       if (decay)
0140       {
0141         // The extDecayer will be deleted in G4Decay destructor
0142         // increment counter in case we want to print out stats
0143         // for whatever reason (non null means it is used and
0144         // must not be deleted)
0145         //       particle->SetDecayTable(NULL);
0146         decay->SetExtDecayer(extDecayer);
0147         decayer_used++;
0148       }
0149     }
0150   }
0151
0152   // If the extDecayer isn't used for this particle we need to delete it here
0153   // as far as I see this never happens but this makes coverity happy
0154   if (!decayer_used)
0155   {
0156     delete extDecayer;
0157   }
0158
0159   if (verboseLevel > 0)
0160   {
0161     std::cout << "External decayer physics constructed." << std::endl;
0162   }
0163 }
0164
0165 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......