TFCSHitCellMappingFCal.cxx

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/*
  Copyright (C) 2002-2018 CERN for the benefit of the ATLAS collaboration
*/
 
#include "ISF_FastCaloSimEvent/TFCSHitCellMappingFCal.h"
#include "ISF_FastCaloSimEvent/ICaloGeometry.h"
#include "ISF_FastCaloSimEvent/TFCSSimulationState.h"
 
//=============================================
//======= TFCSHitCellMappingFCal =========
//=============================================
 
FCSReturnCode TFCSHitCellMappingFCal::simulate_hit(
    Hit &hit, TFCSSimulationState &simulstate, const TFCSTruthState * /*truth*/,
    const TFCSExtrapolationState * /*extrapol*/) {
  int cs = calosample();
  float distance;
  const CaloDetDescrElement* cellele=m_geo->getFCalDDE(cs,hit.x(),hit.y(),hit.z(),&distance);
  ATH_MSG_DEBUG("HIT: cellele=" << cellele << " E=" << hit.E() << " cs=" << cs
                                << " x=" << hit.x() << " y=" << hit.y()
                                << " z=" << hit.z());
 
  if ((hit.x() == 0 && hit.y() == 0) || cellele == nullptr) {
    ATH_MSG_WARNING(
        "TFCSLateralShapeParametrizationHitCellMapping::simulate_hit: cellele="
        << cellele << " E=" << hit.E() << " cs=" << cs << " eta=" << hit.eta()
        << " phi=" << hit.phi());
    return (FCSReturnCode)(FCSRetry + 5); // retry simulation up to 5 times
  }
 
  // If the distance is positive then we are using the nearest cell rather than are inside a cell
  // If we are more than 2.25mm from the nearest cell we don't create a hit to avoid the build-up of energy in edge cells
  // For FCSV2 another hit can be created but with a cutoff to avoid looping, 
  // for FastCaloGAN the rest of the hits in the layer will be scaled up by the energy renormalization step.
  if (distance<2.25){
    simulstate.deposit(cellele,hit.E());
  }else{
    hit.setXYZE(hit.x(),hit.y(),hit.z(),0.0);
  }
 
  return FCSSuccess;
}