/data/refman/pasoursint/CMSSW_6_1_1/src/SimCalorimetry/CastorSim/src/CastorSimParameters.cc

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#include "SimCalorimetry/CastorSim/src/CastorSimParameters.h"
#include "DataFormats/HcalDetId/interface/HcalSubdetector.h"
#include "DataFormats/HcalDetId/interface/HcalGenericDetId.h"
#include "DataFormats/HcalDetId/interface/HcalDetId.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "CondFormats/CastorObjects/interface/CastorGain.h"
#include "CondFormats/CastorObjects/interface/CastorGainWidth.h"
#include "CLHEP/Random/RandGaussQ.h"


CastorSimParameters::CastorSimParameters(double simHitToPhotoelectrons, double photoelectronsToAnalog,double samplingFactor, double timePhase, bool syncPhase)
: CaloSimParameters(simHitToPhotoelectrons, photoelectronsToAnalog, samplingFactor, timePhase, 6, 4, false, syncPhase),
  theDbService(0),
  theSamplingFactor( samplingFactor )
{
}


CastorSimParameters::CastorSimParameters(const edm::ParameterSet & p)
:  CaloSimParameters(p),
   theDbService(0),
   theSamplingFactor( p.getParameter<double>("samplingFactor") )
{
}

/*
double CastorSimParameters::simHitToPhotoelectrons(const DetId & detId) const 
{
  // the gain is in units of GeV/fC.  We want a constant with pe/dGeV
  // pe/dGeV = (GeV/dGeV) / (GeV/fC) / (fC/pe) 
  double result = CaloSimParameters::simHitToPhotoelectrons(detId);
  if(HcalGenericDetId(detId).genericSubdet() != HcalGenericDetId::HcalGenForward
     || HcalGenericDetId(detId).genericSubdet() != HcalGenericDetId::HcalGenCastor)
    { 
      result = samplingFactor(detId) / fCtoGeV(detId) / photoelectronsToAnalog();
    }
  return result;
}
*/

double CastorSimParameters::photoelectronsToAnalog(const DetId & detId) const
{
  // calculate factor (PMT gain) using sampling factor value & available electron gain
  //std::cout << " sampling factor = " << theSamplingFactor << " fCtoGeV = " << fCtoGeV(detId) << " and photoelectronsToAnalog = " << theSamplingFactor/fCtoGeV(detId) << std::endl;
  return theSamplingFactor/fCtoGeV(detId);
}



double CastorSimParameters::fCtoGeV(const DetId & detId) const
{
  assert(theDbService != 0);
  HcalGenericDetId hcalGenDetId(detId);
  const CastorGain* gains = theDbService->getGain(hcalGenDetId);
  const CastorGainWidth* gwidths = theDbService->getGainWidth(hcalGenDetId);
  if (!gains || !gwidths )
  {
    edm::LogError("CastorAmplifier") << "Could not fetch HCAL conditions for channel " << hcalGenDetId;
  }
  // only one gain will be recorded per channel, so just use capID 0 for now
  
  double result = gains->getValue(0);
//  if(doNoise_)
//    result += CLHEP::RandGaussQ::shoot(0.,  gwidths->getValue(0));
//  }
  return result;
}
/*
double CastorSimParameters::samplingFactor(const DetId & detId) const {  
HcalDetId hcalDetId(detId); 
return theSamplingFactors[hcalDetId.ietaAbs()-theFirstRing];
}
*/