GEMNumberingScheme.cc

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#include "Geometry/MuonNumbering/interface/GEMNumberingScheme.h"
#include "Geometry/MuonNumbering/interface/MuonBaseNumber.h"
#include "Geometry/MuonNumbering/interface/MuonDDDConstants.h"
#include "DataFormats/MuonDetId/interface/GEMDetId.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

//#define LOCAL_DEBUG

GEMNumberingScheme::GEMNumberingScheme( const MuonDDDConstants& muonConstants ) {
  initMe(muonConstants);
}

GEMNumberingScheme::GEMNumberingScheme( const DDCompactView& cpv ){
  MuonDDDConstants muonConstants(cpv);
  initMe(muonConstants);
}

void GEMNumberingScheme::initMe ( const MuonDDDConstants& muonConstants ) {
  int theLevelPart= muonConstants.getValue("level");
  theRegionLevel  = muonConstants.getValue("mg_region")/theLevelPart;
  theStationLevel = muonConstants.getValue("mg_station")/theLevelPart;
  theRingLevel    = muonConstants.getValue("mg_ring")/theLevelPart;
  theSectorLevel  = muonConstants.getValue("mg_sector")/theLevelPart;
  theRollLevel    = muonConstants.getValue("mg_roll")/theLevelPart;
#ifdef LOCAL_DEBUG
  edm::LogVerbatim("GEMNumberingScheme") 
    << "Initialize GEMNumberingScheme" 
    << "\ntheRegionLevel " << theRegionLevel 
    << "\ntheStationLevel "<< theStationLevel
    << "\ntheRingLevel "   << theRingLevel   
    << "\ntheSectorLevel " << theSectorLevel 
    << "\ntheRollLevel "   << theRollLevel;
#endif
}

int GEMNumberingScheme::baseNumberToUnitNumber(const MuonBaseNumber& num) {

#ifdef LOCAL_DEBUG
  edm::LogVerbatim("GEMNumberingScheme") << "GEMNumbering " << num.getLevels();
  for (int level=1;level<=num.getLevels();level++) {
    edm::LogVerbatim("GEMNumberingScheme") 
      << level << " " << num.getSuperNo(level) << " " << num.getBaseNo(level);
  }
#endif

  int maxLevel = theRollLevel;
  if (num.getLevels()!=maxLevel) {
    edm::LogWarning("GEMNumberingScheme") 
      << "MuonGEMNumberingScheme::BNToUN: BaseNumber has " << num.getLevels() 
      << " levels, need " << maxLevel;
    return 0;
  }

  int region(0), ring(0), station(0), layer(0), chamber(0), roll(0);

  //decode significant GEM levels
  
  if (num.getBaseNo(theRegionLevel) == 0) region = 1;
  else                                    region =-1;

  // All GEM super chambers in stations 1 and 2 are on ring 1. 
  // The long super chambers in station 2 are assigned *station 3* due 
  // to the current limitation in the definition of the GEMDetId, 
  // i.e. only 2 layers available per station.
  //  ring    = num.getSuperNo(theRingLevel);
  // GEM are only on the first ring
  ring = 1;
  station = num.getSuperNo(theStationLevel);
#ifdef LOCAL_DEBUG
  edm::LogVerbatim("GEMNumberingScheme") 
    << "GEMNumbering: Ring " << ring << " Station "
    << num.getSuperNo(theStationLevel) << ":" << station;
#endif
  
  roll    = num.getBaseNo(theRollLevel)+1;
  const int copyno = num.getBaseNo(theSectorLevel) + 1;
  if (copyno < 50) {
    if (copyno%2 == 0) {
      layer   = 2;
      chamber = copyno-1;
    } else {
      layer   = 1;
      chamber = copyno;
    }
  } else {
    int copynp = copyno - 50;
    if (copynp%2 != 0) {
      layer   = 2;
      chamber = copynp-1;
    } else {
      layer   = 1;
      chamber = copynp;
    }
  }

  // collect all info
  
#ifdef LOCAL_DEBUG
  edm::LogVerbatim("GEMNumberingScheme") 
    << "GEMNumberingScheme: Region " << region << " Ring "
    << ring << " Station " << station << " Layer " << layer
    << " Chamber " << chamber << " Roll " << roll;
#endif

  // Build the actual numbering
  GEMDetId id(region,ring,station,layer,chamber, roll);
  
  
#ifdef LOCAL_DEBUG
  edm::LogVerbatim("GEMNumberingScheme") << id.rawId() << " DetId " << id;
#endif
      
  return id.rawId();
}