herwigpp_2.2.1.cc

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//example of Herwig++, generate pp -> ttbar events
//by Zhonghua Qin <zhonghua.qin@desy.de> 
#include "ThePEG/Repository/EventGenerator.h"
#include "ThePEG/Repository/Repository.h"
#include "ThePEG/Persistency/PersistentIStream.h"
#include "ThePEG/Utilities/DynamicLoader.h"
#include "ThePEG/EventRecord/Event.h"
#include "ThePEG/EventRecord/SubProcess.h"
#include "ThePEG/Handlers/XComb.h"
#include "ThePEG/Handlers/EventHandler.h"
#include "ThePEG/PDF/PartonExtractor.h"
#include "ThePEG/PDF/PDF.h"
#include "ThePEG/Vectors/HepMCConverter.h"
#include "ThePEGHepMC_1.3.0.h"

#include "HepMC/GenEvent.h"
#include "HepMC/IO_GenEvent.h"
#include "HepMC/GenEvent.h"
#include "HepMC/IO_AsciiParticles.h"
#include "HepMC/SimpleVector.h"

#include <iostream>
#include <stdio.h>
#include <string>

#include "TH1.h"
#include "TFile.h"
#include "TMath.h"
#include <TCanvas.h>

#include "TF1.h"
#include <TH2.h>
#include <TStyle.h>
#include "TLegend.h"
#include <TTree.h>
#include <TString.h>

using namespace ThePEG;

// include our own classes
#include "../../include/TopAnalysis.h"
#include "../../include/TauAnalysis.h"
#include "../../include/DiJetAnalysis.h"
#include "../../include/WplusJetAnalysis.h"
#include "../../include/ZAnalysis.h"
#include "../../include/UEAnalysis.h"
#include "readHerwigConfigFile.h"
#include "../../include/Configuration.h"

int main(int argc, const char* argv[]) {

  if(argc <= 1 ) {
      std::cout << "Usage: " << argv[0] << " <Configuration File>" << std::endl;
      return 0;
  }
  
  
  Configuration* currentconfig = new Configuration();
  if(currentconfig->read(argv[1]))
      {
          std::cout << " ... skip !" << std::endl;
          return 0;
      }

  DiJetAnalysis dijet;
  WplusJetAnalysis wplusjet;
  ZAnalysis z0;
  TauAnalysis tau;
  TopAnalysis top;
  UEAnalysis ue;

  // create analysis Objects and initialize them                                                                                          
  if(currentconfig->dijet){
    dijet.Init(currentconfig->max_eta,currentconfig->min_pt);
    dijet.InitJetFinder(currentconfig->coneRadius,currentconfig->overlapThreshold,currentconfig->jet_ptmin);
  }

  if(currentconfig->wplusjet){
    wplusjet.Init(currentconfig->max_eta,currentconfig->min_pt);
    wplusjet.InitJetFinder(currentconfig->coneRadius,currentconfig->overlapThreshold,currentconfig->jet_ptmin);
  }

  if(currentconfig->z){
    z0.Init(currentconfig->max_eta,currentconfig->min_pt);
    z0.InitJetFinder(currentconfig->coneRadius,currentconfig->overlapThreshold,currentconfig->jet_ptmin);
  }
  if(currentconfig->tau){
    tau.Init(currentconfig->max_eta,currentconfig->min_pt);
    tau.InitJetFinder(currentconfig->coneRadius,currentconfig->overlapThreshold,currentconfig->jet_ptmin);
  }
  if(currentconfig->top){
    top.Init(currentconfig->max_eta,currentconfig->min_pt);
    top.InitJetFinder(currentconfig->coneRadius,currentconfig->overlapThreshold,currentconfig->jet_ptmin);
  }
  if(currentconfig->ue){
    ue.Init(currentconfig->max_eta,currentconfig->min_pt);
    ue.InitJetFinder(currentconfig->coneRadius,currentconfig->overlapThreshold,currentconfig->jet_ptmin);
  }
  
  //Add a path to seach for dynamically linkable libraries
  std::cout<<"Add a path to seach for dynamically linkable libraries..."<<std::endl;
  ThePEG::DynamicLoader::appendPath(HWMODULEDIR);
  ThePEG::DynamicLoader::appendPath(THEPEGMODULEDIR);
  
  //Load a whole repository from the given file
  std::cout<<"Load repository from a given file..."<<std::endl;
  const string repopath = string(HWREPODIR) + "/HerwigDefaults.rpo";
  ThePEG::Repository::load(repopath);

  //Setup process,interpret the command in cmd and return possible messages
  std::cout<<"Setup process,interpret the command in cmd and return possible messages..."<<std::endl;

  // set random number seed (mandatory!) ... this may be overwritten by function readConfigFile
  char exec_command[100];
  sprintf(exec_command,"set LHCGenerator:RandomNumberGenerator:Seed %ld",currentconfig->rseed); 
  ThePEG::Repository::exec("cd /Herwig/Generators", cout);
  ThePEG::Repository::exec(exec_command, cout);

  // vector to store herwig commandlines from Configuration file
  std::vector< std::string > herwig_commands;
  // read in commandlines
  for (unsigned int files=0; files<(currentconfig->ConfigFileNames).size(); files++)
      readConfigFile(&herwig_commands,(currentconfig->ConfigFileNames)[files]);

  // loop over the commands
  for(unsigned int i=0; i<herwig_commands.size(); i++)
      ThePEG::Repository::exec( herwig_commands[i].c_str(), cout);

 //switches for FSR, ISR and MI
  ThePEG::Repository::exec("cd /Herwig/Shower", cout);
  
  sprintf(exec_command,"set SplittingGenerator:ISR %c",currentconfig->ISR);
  ThePEG::Repository::exec(exec_command, cout);
  
  sprintf(exec_command,"set SplittingGenerator:FSR %c",currentconfig->FSR);
  ThePEG::Repository::exec(exec_command, cout);
  
  sprintf(exec_command,"set ShowerHandler:MPI %c",currentconfig->MI);
  ThePEG::Repository::exec(exec_command, cout);


  //Check sanity of the object during the setup phase
  ThePEG::Repository::update();

 // ThePEG generator object.
  ThePEG::EGPtr m_hw;

  // ThePEG event object.
  ThePEG::EventPtr m_event;

 // Make a "run" object from the config repository.
  ThePEG::EGPtr tmpEG = ThePEG::BaseRepository::GetObject<ThePEG::EGPtr>("/Herwig/Generators/LHCGenerator");
  m_hw = ThePEG::Repository::makeRun(tmpEG, "LHC");

 //Herwig++ initializing
  std::cout<<"Herwig++ initializing..."<<std::endl;
  m_hw->initialize();

 //Loop for events generating and fill histograms
  std::cout<<"Generating events and filling histograms..."<<std::endl;
  
 //Change the value of nEvent to the number of events you want to generate
  for (unsigned int iEvent = 0; iEvent < currentconfig->nevents; ++iEvent) {

 // Run the generator for one event.
  assert(m_hw);
  m_event = m_hw->shoot();

 // Fill HepMC event from Herwig's internally stored EventPtr.
 // Convert the Herwig event into the HepMC GenEvent
  HepMC::GenEvent*  evt = new HepMC::GenEvent();
  ThePEG::HepMCConverter<HepMC::GenEvent>::convert(*m_event, *evt, false, ThePEG::GeV);

  int ret_dijet = SUCCESS;
  int ret_wplusjet = SUCCESS;
  int ret_z0 = SUCCESS;
  int ret_tau = SUCCESS;
  int ret_top = SUCCESS;
  int ret_ue = SUCCESS;

  //call analysis
  if(currentconfig->dijet)       ret_dijet = dijet.Process(evt);
  if(currentconfig->wplusjet)    ret_wplusjet = wplusjet.Process(evt);
  if(currentconfig->z)           ret_z0 = z0.Process(evt);
  if(currentconfig->tau)  ret_tau = tau.Process(evt);
  if(currentconfig->top)  ret_top = top.Process(evt);
  if(currentconfig->ue)   ret_ue = ue.Process(evt);

  if (ret_dijet==FAILURE || ret_wplusjet==FAILURE || ret_z0==FAILURE
      || ret_tau==FAILURE || ret_top==FAILURE || ret_ue==FAILURE)
      {
        std::cout << "Processing event number " << iEvent << std::endl;
        std::cout << "throw FAILURE"<<std::endl;
        //std::cout<<"HepMC Output"<<std::endl;
        //evt->print();
        std::cout<<std::endl;
      }

  //delete all the jet objects to be free for the next event
  if(currentconfig->dijet)       dijet.DeleteJetObject(evt);
  if(currentconfig->wplusjet)    wplusjet.DeleteJetObject(evt);
  if(currentconfig->z)         z0.DeleteJetObject(evt);
  if(currentconfig->tau)       tau.DeleteJetObject(evt);
  if(currentconfig->top)       top.DeleteJetObject(evt);
  if(currentconfig->ue)        ue.DeleteJetObject(evt);

  delete evt;
  }

  TFile* f = new TFile(currentconfig->OutputFileName.c_str(),"RECREATE");
  if(currentconfig->dijet)       dijet.Finalize(f);
  if(currentconfig->wplusjet)    wplusjet.Finalize(f);
  if(currentconfig->z)         z0.Finalize(f);
  if(currentconfig->tau)       tau.Finalize(f);
  if(currentconfig->top)       top.Finalize(f);
  if(currentconfig->ue)        ue.finalize(f);
  delete currentconfig;

  //Tidy up, Herwig++ finalizing
  std::cout<<"Herwig++ finalizing..."<<std::endl;
  assert(m_hw);
  m_hw->finalize();
  ThePEG::Repository::cleanup();

  std::cout<<"Run successfully!"<<std::endl;
  return 0;
 }

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