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OpNovice2.cc
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OpNovice2.cc
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//
// ********************************************************************
// * License and Disclaimer *
// * *
// * The Geant4 software is copyright of the Copyright Holders of *
// * the Geant4 Collaboration. It is provided under the terms and *
// * conditions of the Geant4 Software License, included in the file *
// * LICENSE and available at http://cern.ch/geant4/license . These *
// * include a list of copyright holders. *
// * *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work make any representation or warranty, express or implied, *
// * regarding this software system or assume any liability for its *
// * use. Please see the license in the file LICENSE and URL above *
// * for the full disclaimer and the limitation of liability. *
// * *
// * This code implementation is the result of the scientific and *
// * technical work of the GEANT4 collaboration. *
// * By using, copying, modifying or distributing the software (or *
// * any work based on the software) you agree to acknowledge its *
// * use in resulting scientific publications, and indicate your *
// * acceptance of all terms of the Geant4 Software license. *
// ********************************************************************
//
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
// Standard C++ Libraries
#include <stdexcept>
#include <iostream>
#include <unistd.h>
#include <fstream>
// Geant4 Libraries
#include "globals.hh"
#include "CLHEP/Random/Random.h"
#include "G4RunManager.hh"
#include "G4UItcsh.hh"
#include "G4UIterminal.hh"
#include "G4RunManagerFactory.hh"
#include "G4String.hh"
#include "G4Types.hh"
#include "G4UIExecutive.hh"
#include "G4UImanager.hh"
#include "G4VisExecutive.hh"
// Initialized Modules
#include "DetectorConstruction.hh"
#include "PrimaryGeneratorAction.hh"
#include "RunAction.hh"
#include "SteppingAction.hh"
#include "TrackingAction.hh"
#include "OutputManager.hh"
#include "EventAction.hh"
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
int main(int argc, char** argv) {
// Setting Event Seed
CLHEP::HepRandom::createInstance();
// Generates a random seed for the event
unsigned int seed = time(0) + (int)getpid();
unsigned int devrandseed = 0;
FILE *fdrand = fopen("/dev/urandom", "r");
if (fdrand) {
fread(&devrandseed, sizeof(int), 1, fdrand);
seed += devrandseed;
fclose(fdrand);
}
// Setting the seed for the random number generator
CLHEP::HepRandom::setTheSeed(seed);
// detect interactive mode (if no arguments) and define UI session
G4UIExecutive* ui = nullptr;
if(argc == 1) {
ui = new G4UIExecutive(argc, argv);
}
// creates the Geant4 RunManager using the G4RunManagerFactory Factory class
auto runManager = G4RunManagerFactory::CreateRunManager();
// creates a new instance of each class using dynamic memory
PhysicsList* phys = new PhysicsList(); // defines the Physics of the Experiment
DetectorConstruction* detCon = new DetectorConstruction(); // defines the Geometry and Detector of the Experiment
PrimaryGeneratorAction* pga = new PrimaryGeneratorAction();
RunAction* runAction = new RunAction(pga);
OutputManager* outManager = new OutputManager(); // Outputs results to ROOT
EventAction* event = new EventAction(runAction, outManager, pga);
// Configuring the RunManager with user-defined classes
runManager->SetUserInitialization(phys);
runManager->SetUserInitialization(detCon);
runManager->SetUserInitialization(pga);
runManager->SetUserInitialization(runAction);
runManager->SetUserAction(event);
// Setting additional user actions
runManager->SetUserAction(new SteppingAction(event));
runManager->SetUserAction(new TrackingAction);
// Initialize visualization
G4VisManager* visManager = nullptr;
// Get the Pointer to the User Interface manager
G4UImanager* UImanager = G4UImanager::GetUIpointer();
if(ui) // Interactive Mode
{
// Setting up Geant4 visualization manager for interactive mode
visManager = new G4VisExecutive;
visManager->Initialize();
// Starting the Geant4 UI session for interactive mode
ui->SessionStart();
delete ui; // Cleaning up the user interface session
}
else // Batch Mode
{
if (argc > 1)
{
G4String fileName = argv[1];
// Check if the specified file exists before applying the command
if (std::ifstream(fileName))
{
// Applying Geant4 control commands from the specified file
G4String command = "/control/execute ";G4String command = "/control/execute ";
UImanager->ApplyCommand(command + fileName);
// Running the simulation for the specified number of events
G4String commandr = "/run/beamOn ";
G4int nev = pga->GetNEvents();
char snev[50];
sprintf( snev, "%d", nev);
UImanager->ApplyCommand(commandr+snev);
}
else
{
G4cerr << "Error: File" << fileName << " does not exist." << G4endl;
}
}
else
{
G4cerr << "Error: No input file specified in batch mode." << G4endl;
}
}
// Cleaning up resources
delete outManager; // Cleaning up the output manager
delete runManager; // Cleaning up the Geant4 RunManager
return 0; // Exiting the program
}
//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......