/data/refman/pasoursint/CMSSW_5_3_3/src/SimMuon/CSCDigitizer/src/CSCNeutronReader.cc

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#include "SimMuon/CSCDigitizer/src/CSCNeutronReader.h"
#include "SimDataFormats/TrackingHit/interface/PSimHit.h"
#include "DataFormats/MuonDetId/interface/CSCDetId.h"
#include "Geometry/CSCGeometry/interface/CSCChamberSpecs.h"


void CSCNeutronReader::addHits(std::map<int, edm::PSimHitContainer> & hitMap)
{
  std::vector<int> chambersDone;

  std::map<int, edm::PSimHitContainer> signalHits = hitMap;
  for(std::map<int, edm::PSimHitContainer>::const_iterator signalHitItr = signalHits.begin();
      signalHitItr != signalHits.end(); ++signalHitItr)
  {
    int chamberIndex = chamberId(signalHitItr->first);

    // see if this chamber has been done yet
    if(find(chambersDone.begin(), chambersDone.end(), chamberIndex) == chambersDone.end())
    {
      edm::PSimHitContainer neutronHits;
      generateChamberNoise(chamberType(chamberIndex), chamberIndex, neutronHits);

      // add these hits to the original map
      for(edm::PSimHitContainer::const_iterator neutronHitItr = neutronHits.begin();
          neutronHitItr != neutronHits.end(); ++neutronHitItr) 
      {
        uint32_t layerId = neutronHitItr->detUnitId();
        hitMap[layerId].push_back(*neutronHitItr);
      }
      // mark chamber as done
      chambersDone.push_back(chamberIndex);
    }
  }
}


int CSCNeutronReader::detId(int chamberIndex, int localDetId )
{
  // add the layer bits
  return chamberIndex + localDetId;
}


int CSCNeutronReader::localDetId(int globalDetId) const
{
  return CSCDetId(globalDetId).layer();
}


int CSCNeutronReader::chamberType(int globalDetId) const
{
  CSCDetId id(globalDetId);
  return CSCChamberSpecs::whatChamberType(id.station(), id.ring());
}


int CSCNeutronReader::chamberId(int globalDetId) const
{
  return CSCDetId(globalDetId).chamberId().rawId();
}