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FamosManager.cc

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// CMSSW Header
#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/Framework/interface/Run.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "FWCore/Framework/interface/ESHandle.h"
#include "FWCore/ServiceRegistry/interface/Service.h"
#include "FWCore/Utilities/interface/RandomNumberGenerator.h"
#include "FWCore/Utilities/interface/Exception.h"
#include "DataFormats/Provenance/interface/EventID.h"

#include "SimGeneral/HepPDTRecord/interface/ParticleDataTable.h"

#include "MagneticField/Records/interface/IdealMagneticFieldRecord.h"

//#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeometry.h"
//#include "RecoTracker/TkDetLayers/interface/GeometricSearchTracker.h"
#include "RecoTracker/Record/interface/TrackerRecoGeometryRecord.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include "FastSimulation/TrackerSetup/interface/TrackerInteractionGeometryRecord.h"
#include "FastSimulation/ParticlePropagator/interface/MagneticFieldMapRecord.h"

#include "Geometry/Records/interface/CaloGeometryRecord.h"
#include "Geometry/CaloGeometry/interface/CaloGeometry.h"
#include "Geometry/CaloEventSetup/interface/CaloTopologyRecord.h"
//#include "Geometry/CaloTopology/interface/CaloTopology.h"

// HepMC headers
//#include "HepMC/GenEvent.h"

// FAMOS Header
#include "FastSimulation/Utilities/interface/RandomEngine.h"
#include "FastSimulation/EventProducer/interface/FamosManager.h"
#include "FastSimulation/TrajectoryManager/interface/TrajectoryManager.h"
#include "FastSimulation/PileUpProducer/interface/PileUpSimulator.h"
#include "FastSimulation/Event/interface/FSimEvent.h"
#include "FastSimulation/ParticlePropagator/interface/MagneticFieldMap.h"
#include "FastSimulation/Particle/interface/ParticleTable.h"
#include "FastSimulation/Calorimetry/interface/CalorimetryManager.h"
#include "FastSimulation/CaloGeometryTools/interface/CaloGeometryHelper.h"  
#include <iostream>
#include <memory>
#include <vector>

using namespace HepMC;

FamosManager::FamosManager(edm::ParameterSet const & p)
    : iEvent(0),
      myPileUpSimulator(0),
      myCalorimetry(0),
      m_pUseMagneticField(p.getParameter<bool>("UseMagneticField")),
      m_Tracking(p.getParameter<bool>("SimulateTracking")),
      m_Calorimetry(p.getParameter<bool>("SimulateCalorimetry")),
      m_Alignment(p.getParameter<bool>("ApplyAlignment")),
      m_pRunNumber(p.getUntrackedParameter<int>("RunNumber",1)),
      m_pVerbose(p.getUntrackedParameter<int>("Verbosity",1))
{

  std::cout << " FamosManager initializing " << std::endl;

  // Initialize the random number generator service
  edm::Service<edm::RandomNumberGenerator> rng;
  if ( ! rng.isAvailable() ) {
    throw cms::Exception("Configuration")
      << "FamosManager requires the RandomGeneratorService\n"
         "which is not present in the configuration file.\n"
         "You must add the service in the configuration file\n"
         "or remove the module that requires it";
  }

  random = new RandomEngine(&(*rng));

  // Initialize the FSimEvent
  mySimEvent = 
    new FSimEvent(p.getParameter<edm::ParameterSet>("VertexGenerator"),
                  p.getParameter<edm::ParameterSet>("ParticleFilter"),
                  random);

  myTrajectoryManager = 
    new TrajectoryManager(mySimEvent,
                          p.getParameter<edm::ParameterSet>("MaterialEffects"),
                          p.getParameter<edm::ParameterSet>("TrackerSimHits"),
                          p.getParameter<edm::ParameterSet>("ActivateDecays"),
                          random);

  // Initialize PileUp Producer (if requested)
  myPileUpSimulator = new PileUpSimulator(mySimEvent);

  // Initialize Calorimetry Fast Simulation (if requested)
  if ( m_Calorimetry) 
    myCalorimetry = 
      new CalorimetryManager(mySimEvent,
                             p.getParameter<edm::ParameterSet>("Calorimetry"),
                             random);

}

FamosManager::~FamosManager()
{ 
  if ( mySimEvent ) delete mySimEvent; 
  if ( myTrajectoryManager ) delete myTrajectoryManager; 
  if ( myPileUpSimulator ) delete myPileUpSimulator;
  if ( myCalorimetry) delete myCalorimetry;
  delete random;
}

void 
FamosManager::setupGeometryAndField(edm::Run & run, const edm::EventSetup & es)
{
  std::cout << "FamosManager : setup geometry and field" << std::endl;

  // Particle data table (from Pythia)
  edm::ESHandle < HepPDT::ParticleDataTable > pdt;
  es.getData(pdt);
  mySimEvent->initializePdt(&(*pdt));
  ParticleTable::instance(&(*pdt));

  // Initialize the full (misaligned) tracker geometry 
  // (only if tracking is requested)
  std::string misAligned = m_Alignment ? "MisAligned" : "";
  // 1) By default, the aligned geometry is chosen (m_Alignment = false)
  // 2) By default, the misaligned geometry is aligned
  edm::ESHandle<TrackerGeometry> tracker;
  es.get<TrackerDigiGeometryRecord>().get(misAligned,tracker);
  if (m_Tracking)  myTrajectoryManager->initializeTrackerGeometry(&(*tracker)); 

  // Initialize the tracker misaligned reco geometry (always needed)
  // By default, the misaligned geometry is aligned
  edm::ESHandle<GeometricSearchTracker>       theGeomSearchTracker;
  es.get<TrackerRecoGeometryRecord>().get(misAligned, theGeomSearchTracker );

  // Initialize the misaligned tracker interaction geometry 
  edm::ESHandle<TrackerInteractionGeometry>  theTrackerInteractionGeometry;
  es.get<TrackerInteractionGeometryRecord>().get(misAligned, theTrackerInteractionGeometry );

  // Initialize the magnetic field
  double bField000 = 0.;
  if (m_pUseMagneticField) {
    edm::ESHandle<MagneticFieldMap> theMagneticFieldMap;
    es.get<MagneticFieldMapRecord>().get(misAligned, theMagneticFieldMap);
    const GlobalPoint g(0.,0.,0.);
    bField000 = theMagneticFieldMap->inTeslaZ(g);
    myTrajectoryManager->initializeRecoGeometry(&(*theGeomSearchTracker),
                                                &(*theTrackerInteractionGeometry),
                                                &(*theMagneticFieldMap));
  } else { 
    myTrajectoryManager->initializeRecoGeometry(&(*theGeomSearchTracker),
                                                &(*theTrackerInteractionGeometry),
                                                0);
    bField000 = 4.0;
  }
  std::cout << "B-field(T) at (0,0,0)(cm): " << bField000 << std::endl;      
    
  //  Initialize the calorimeter geometry
  if ( myCalorimetry ) {
    edm::ESHandle<CaloGeometry> pG;
    es.get<CaloGeometryRecord>().get(pG);   
    myCalorimetry->getCalorimeter()->setupGeometry(*pG);

    edm::ESHandle<CaloTopology> theCaloTopology;
    es.get<CaloTopologyRecord>().get(theCaloTopology);     
    myCalorimetry->getCalorimeter()->setupTopology(*theCaloTopology);
    myCalorimetry->getCalorimeter()->initialize(bField000);
  }

  m_pRunNumber = run.run();

}


void 
FamosManager::reconstruct(const HepMC::GenEvent* evt,
                          const reco::GenParticleCollection* particles,
                          const HepMC::GenEvent* pu) 
{

  //  myGenEvent = evt;

  if (evt != 0 || particles != 0) {
    iEvent++;
    edm::EventID id(m_pRunNumber,iEvent);


    // Fill the event from the original generated event
    if (evt ) 
      mySimEvent->fill(*evt,id);
    else
      mySimEvent->fill(*particles,id);


    //    mySimEvent->printMCTruth(*evt);
    /*
    mySimEvent->print();
    std::cout << "----------------------------------------" << std::endl;
    */

    // Get the pileup events and add the particles to the main event
    myPileUpSimulator->produce(pu);

    /*
    mySimEvent->print();
    std::cout << "----------------------------------------" << std::endl;
    */

    // And propagate the particles through the detector
    myTrajectoryManager->reconstruct();
    /*
    mySimEvent->print();
    std::cout << "=========================================" 
              << std::endl
              << std::endl;
    */

    if ( myCalorimetry ) myCalorimetry->reconstruct();

  }

  std::cout << " saved : Event  " << iEvent 
            << " of weight " << mySimEvent->weight()
            << " with " << mySimEvent->nTracks() 
            << " tracks and " << mySimEvent->nVertices()
            << " vertices, generated by " 
            << mySimEvent->nGenParts() << " particles " << std::endl;
  
}

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