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EcalTrigTowerConstituentsMap.cc

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#include "Geometry/CaloTopology/interface/EcalTrigTowerConstituentsMap.h"
#include "DataFormats/EcalDetId/interface/EBDetId.h"
#include "DataFormats/EcalDetId/interface/EEDetId.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "FWCore/Utilities/interface/Exception.h"

EcalTrigTowerConstituentsMap::EcalTrigTowerConstituentsMap() 
{
}

EcalTrigTowerDetId EcalTrigTowerConstituentsMap::towerOf(const DetId& id) const {
  if (id.det() == DetId::Ecal && id.subdetId() == EcalBarrel)
    {
      //--------------------
      // Ecal Barrel
      //--------------------
      EBDetId myId(id);
      return myId.tower();
    }
  else if (id.det() == DetId::Ecal && id.subdetId() == EcalEndcap)
    {
      //--------------------
      // Ecal Endcap
      //--------------------
      EEDetId originalId(id);
      // DetId wrappedId=wrapEEDetId(id);
      DetId wrappedId(originalId);
      EcalTowerMap::const_iterator i=m_items.find(wrappedId);
      if (i!=m_items.end()) 
        {
          int etaTower=i->tower.ietaAbs();
          int phiTower=i->tower.iphi();
          //trigger tower <-> crystal maping read 
          //..........from file and done only for 1 quadrant
          //move from quadrant 1 to the actual one:
          // phiTower = changeTowerQuadrant(phiTower, 1, originalId.iquadrant());
          // std::cout << originalId.zside() <<  " " << etaTower << " " << phiTower << std::endl;
          return EcalTrigTowerDetId(originalId.zside(),EcalEndcap,etaTower,phiTower);
        }
    }
  return EcalTrigTowerDetId(0);
}

DetId EcalTrigTowerConstituentsMap::wrapEEDetId(const DetId& eeid) const
{
  if (! (eeid.det() == DetId::Ecal && eeid.subdetId() == EcalEndcap) )
    return EEDetId(0);
  
  EEDetId myId(eeid);
  switch((myId.iquadrant()-1)%4)
    {
    case 0:
      return DetId(EEDetId(myId.ix(),myId.iy(),1,EEDetId::XYMODE));
      break;
    case 1:
      return DetId(EEDetId(101-myId.ix(),myId.iy(),1,EEDetId::XYMODE));
      break;
    case 2:
      return DetId(EEDetId(101-myId.ix(),101-myId.iy(),1,EEDetId::XYMODE));   
      break;
    case 3:
      return DetId(EEDetId(myId.ix(),101-myId.iy(),1,EEDetId::XYMODE));   
      break;
    default:
      /*should never be reached*/
      edm::LogError("EcalTrigTowerConstituentsMapError") << "This should never be reached. Profound error!";    
    }
  return EEDetId(0);
}


DetId EcalTrigTowerConstituentsMap::wrapEcalTrigTowerDetId(const DetId& id) const
{
  EcalTrigTowerDetId etid(id);

  if (! (etid.det() == DetId::Ecal && etid.subdetId() == EcalTriggerTower && etid.subDet() == EcalEndcap) )
    return EcalTrigTowerDetId(0);
  
  switch((etid.iquadrant()-1)%4)
    {
    case 0:
      return DetId(EcalTrigTowerDetId(1,EcalEndcap,etid.ietaAbs(),etid.iphi()));
      break;
    case 1:
      return DetId(EcalTrigTowerDetId(1,EcalEndcap,etid.ietaAbs(),EcalTrigTowerDetId::kEETowersInPhiPerQuadrant * 2 - etid.iphi() + 1));
      break;
    case 2:
      return DetId(EcalTrigTowerDetId(1,EcalEndcap,etid.ietaAbs(),etid.iphi() - EcalTrigTowerDetId::kEETowersInPhiPerQuadrant * 2 ));
      break;
    case 3:
      return DetId(EcalTrigTowerDetId(1,EcalEndcap,etid.ietaAbs(),EcalTrigTowerDetId::kEETowersInPhiPerQuadrant * 4 - etid.iphi() + 1));
      break;
    default:
      /*should never be reached*/
      edm::LogError("EcalTrigTowerConstituentsMapError") << "This should never be reached. Profound error!";    
    }
  return EcalTrigTowerDetId(0);
}

DetId EcalTrigTowerConstituentsMap::changeEEDetIdQuadrantAndZ(const DetId& fromid, const int& toQuadrant,const int& tozside) const
{
  if (! (fromid.det() == DetId::Ecal && fromid.subdetId() == EcalEndcap) )
    return EEDetId(0);
  
  EEDetId myId(fromid);
  int dQuadrant = toQuadrant-myId.iquadrant(); 
  switch(dQuadrant%4){
  case 0:
    return DetId(EEDetId(myId.ix(),myId.iy(),tozside,EEDetId::XYMODE));
    break;
  case 1:
    /* adjacent tower: they are symetric*/
    return DetId(EEDetId(101-myId.ix(),myId.iy(),tozside,EEDetId::XYMODE));
    break;
  case 2:
    /* opposite quadrant: they are identical*/
    return DetId(EEDetId(101-myId.ix(),101-myId.iy(),tozside,EEDetId::XYMODE));   
    break;
  case 3:
    /* adjacent tower: they are symetric*/
    return DetId(EEDetId(myId.ix(),101-myId.iy(),tozside,EEDetId::XYMODE));   
    break;
  default:
    /*should never be reached*/
    edm::LogError("EcalTrigTowerConstituentsMapError") << "This should never be reached. Profound error!";    
  }
  return EEDetId(0);
}

int EcalTrigTowerConstituentsMap::changeTowerQuadrant(int phiTower, int fromQuadrant, int toQuadrant) const{
  int newPhiTower = phiTower;
  int dQuadrant = toQuadrant-fromQuadrant; 
  
  switch(dQuadrant%4){
  case 0:
    newPhiTower = phiTower;
    break;
  case 1:
    /* adjacent tower: they are symetric*/
    newPhiTower = EcalTrigTowerDetId::kEETowersInPhiPerQuadrant * 2 - phiTower + 1;
    break;
  case 2:
    /* opposite quadrant: they are identical*/
    newPhiTower = phiTower + EcalTrigTowerDetId::kEETowersInPhiPerQuadrant * 2;
    break;
  case 3:
    /* adjacent tower: they are symetric*/
    newPhiTower = EcalTrigTowerDetId::kEETowersInPhiPerQuadrant * 4 - phiTower + 1;
    break;
  default:
    /*should never be reached*/
    edm::LogError("EcalTrigTowerConstituentsMapError") << "This should never be reached. Profound error!";    
  }
  return newPhiTower;
}

void EcalTrigTowerConstituentsMap::assign(const DetId& cell, const EcalTrigTowerDetId& tower) {
  if (m_items.find(cell)!=m_items.end()) {
    throw cms::Exception("EcalTrigTowers") << "Cell with id " << std::hex << cell.rawId() << std::dec << " is already mapped to a EcalTrigTower " << m_items.find(cell)->tower << std::endl;
  }
  
  m_items.insert(MapItem(cell,tower));
}

std::vector<DetId> EcalTrigTowerConstituentsMap::constituentsOf(const EcalTrigTowerDetId& id) const {
  std::vector<DetId> items;
  
  if ( id.det() == DetId::Ecal && id.subdetId() == EcalTriggerTower && id.subDet() == EcalBarrel ) 
    {
      //--------------------
      // Ecal Barrel
      //--------------------
      // trigger towers are 5x5 crystals in the barrel
      int etaxtalMin=(id.ietaAbs()-1)*5+1;
      int phixtalMin=(id.iphi()-1)*5+1;
      if(phixtalMin<=0)phixtalMin+=360;
      int etaxtalMax=id.ietaAbs()*5;
      int phixtalMax=id.iphi()*5;
      if(phixtalMax<=0) phixtalMax+=360;
      for(int e=etaxtalMin;e<=etaxtalMax;e++) 
        for(int p=phixtalMin;p<=phixtalMax;p++) 
          items.push_back(DetId(EBDetId(id.zside()*e,p,EBDetId::ETAPHIMODE)));
    }
  else if (id.det() == DetId::Ecal && id.subdetId() == EcalTriggerTower && id.subDet() == EcalEndcap) 
    {
      //--------------------
      // Ecal Endcap
      //--------------------
      DetId myId=wrapEcalTrigTowerDetId(id);  
      EcalTowerMap_by_towerDetId::const_iterator lb,ub;
      boost::tuples::tie(lb,ub)=get<1>(m_items).equal_range(myId);
      while (lb!=ub)
        {
          EEDetId mappedId((*lb).cell);
          items.push_back(changeEEDetIdQuadrantAndZ(mappedId,id.iquadrant(),id.zside()));
          ++lb;
        }
    }
  
  return items;
}

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