TestEm8.cc

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#include "G4RunManager.hh"
#include "G4MTRunManager.hh"
#include "G4UImanager.hh"
#include "G4UIcommand.hh"
#include "Randomize.hh"

#include "DetectorConstruction.hh"
#include "PhysicsList.hh"
#include "ActionInitialization.hh"

#include "G4UIExecutive.hh"
#include "G4VisExecutive.hh"

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int main(int argc,char** argv) {

  //detect interactive mode (if no arguments) and define UI session
  G4UIExecutive* ui = nullptr;
  if (argc == 1) { ui = new G4UIExecutive(argc,argv); }
  
  //choose the Random engine
  CLHEP::HepRandom::setTheEngine(new CLHEP::MixMaxRng);
  
#ifdef G4MULTITHREADED
  G4MTRunManager* runManager = new G4MTRunManager;
  // Number of threads can be defined via 3rd argument
  G4int nThreads = 2;
  if (argc==3) {
    if(G4String(argv[2]) == "NMAX") { 
      nThreads = G4Threading::G4GetNumberOfCores();
    } else {
      nThreads = G4UIcommand::ConvertToInt(argv[2]);
    } 
  } else if(argc==1) { 
    nThreads = 1;
  }
  if (nThreads > 0) { runManager->SetNumberOfThreads(nThreads); }
  G4cout << "===== TestEm8 is started with " 
         <<  runManager->GetNumberOfThreads() << " threads =====" << G4endl;
#else
  G4RunManager* runManager = new G4RunManager;
#endif

  //set mandatory initialization classes
  DetectorConstruction* det = new DetectorConstruction();
  runManager->SetUserInitialization(det);
  runManager->SetUserInitialization(new PhysicsList(det));

  //set user action classes
  runManager->SetUserInitialization(new ActionInitialization());

  //initialize visualization
  G4VisManager* visManager = nullptr;

  //get the pointer to the User Interface manager 
  G4UImanager* UImanager = G4UImanager::GetUIpointer();  

  if (ui)  {
    //interactive mode
    visManager = new G4VisExecutive();
    visManager->Initialize();
    ui->SessionStart();
    delete ui;
  } else {
    //batch mode  
    G4String command = "/control/execute ";
    G4String fileName = argv[1];
    UImanager->ApplyCommand(command+fileName);
  }

  //job termination 
  delete visManager;
  delete runManager;
}

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