IRPCDigitizer.cc

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#include "SimMuon/RPCDigitizer/src/IRPCDigitizer.h"
#include "SimMuon/RPCDigitizer/src/RPCSimFactory.h"
#include "SimMuon/RPCDigitizer/src/RPCSim.h"
#include "SimDataFormats/TrackingHit/interface/PSimHit.h"
#include "Geometry/RPCGeometry/interface/RPCRoll.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"
#include "SimMuon/RPCDigitizer/src/RPCSimSetUp.h"

// default constructor allocates default wire and strip digitizers

IRPCDigitizer::IRPCDigitizer(const edm::ParameterSet& config):
  theRPCSim{RPCSimFactory::get()->create(config.getParameter<std::string>("digiIRPCModel"),
                                         config.getParameter<edm::ParameterSet>("digiIRPCModelConfig"))}
{
  theNoise=config.getParameter<bool>("doBkgNoise");
}

IRPCDigitizer::~IRPCDigitizer() = default;

void IRPCDigitizer::doAction(MixCollection<PSimHit> & simHits, 
                            RPCDigiCollection & rpcDigis,
                RPCDigiSimLinks & rpcDigiSimLink,
                            CLHEP::HepRandomEngine* engine)
{
  
  theRPCSim->setRPCSimSetUp(theSimSetUp);
  
  // arrange the hits by roll
  std::map<int, edm::PSimHitContainer> hitMap;
  for(MixCollection<PSimHit>::MixItr hitItr = simHits.begin();
      hitItr != simHits.end(); ++hitItr) 
    {
      hitMap[hitItr->detUnitId()].push_back(*hitItr);
    }
  
  if ( ! theGeometry) {
    throw cms::Exception("Configuration")
      << "IRPCDigitizer requires the RPCGeometry \n which is not present in the configuration file.  You must add the service\n in the configuration file or remove the modules that require it.";
  }
  
  
  const std::vector<const RPCRoll*>&  rpcRolls = theGeometry->rolls() ;
  for(auto r = rpcRolls.begin();
      r != rpcRolls.end(); r++){
    
    RPCDetId id = (*r)->id();
    const edm::PSimHitContainer & rollSimHits = hitMap[id];
  
    if((*r)->isIRPC()){  
      theRPCSim->simulate(*r, rollSimHits, engine);
      
      if(theNoise){
    theRPCSim->simulateNoise(*r, engine);
      }
    }
   
    
    theRPCSim->fillDigis((*r)->id(),rpcDigis);
    rpcDigiSimLink.insert(theRPCSim->rpcDigiSimLinks());
  }
}

const RPCRoll * IRPCDigitizer::findDet(int detId) const {
  assert(theGeometry != nullptr);
  const GeomDetUnit* detUnit = theGeometry->idToDetUnit(RPCDetId(detId));
  return dynamic_cast<const RPCRoll *>(detUnit);
}