CaloTowerSeg.cxx

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
// $Id$
#include "CaloEvent/CaloTowerSeg.h"
 
const CaloPhiRange CaloTowerSeg::s_range;
 
 
CaloTowerSeg::SubSeg CaloTowerSeg::subseg (double eta, double deta,
                                           double phi, double dphi) const
{
  using index_t = SubSeg::index_t;
 
  index_t etamin = this->etaIndex (eta - deta + 0.001);
  if (etamin == CaloTowerSeg::outOfRange)
    etamin = 1;
 
  index_t etamax = this->etaIndex (eta + deta - 0.001);
  if (etamax == CaloTowerSeg::outOfRange)
    etamax = this->neta();
 
  index_t phimin = this->phiIndex (CaloPhiRange::fix (phi - dphi + 0.001));
  if (phimin == CaloTowerSeg::outOfRange)
    phimin = this->phiIndex (this->phimin());
 
  index_t phimax = this->phiIndex (CaloPhiRange::fix (phi + dphi - 0.001));
  if (phimax == CaloTowerSeg::outOfRange)
    phimax = this->phiIndex (this->phimax() - this->dphi()/2);
 
  return SubSeg (*this, etamin, etamax, phimin, phimax);
}
 
 
CaloTowerSeg::SubSeg::SubSeg (const CaloTowerSeg& parent,
                              index_t etamin, index_t etamax,
                              index_t phimin, index_t phimax)
   : m_parent (parent),
    m_etamin (etamin),
    m_etamax (etamax),
    m_phimin (phimin),
    m_phimax (phimax)
{
}
 
 
size_t CaloTowerSeg::SubSeg::nphi() const
{
  int nphi = m_phimax - m_phimin + 1;
  // Handle phi wraparound.
  if (m_phimax < m_phimin)
    nphi += m_parent.nphi();
  return nphi;
}
 
 
CaloTowerSeg CaloTowerSeg::SubSeg::segmentation() const
{
  const double etamin = m_parent.eta (m_etamin) - m_parent.deta()/2;
  const double etamax = m_parent.eta (m_etamax) + m_parent.deta()/2;
 
  const double phimin = m_parent.phi (m_phimin) - m_parent.dphi()/2;
  const double phimax = m_parent.phi (m_phimax) + m_parent.dphi()/2;
 
  return {neta(), nphi(), etamin, etamax, phimin, phimax};
}