/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_6_2_5/src/SimG4CMS/Forward/src/CastorNumberingScheme.cc

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// File: CastorNumberingScheme.cc
// Description: Numbering scheme for Castor
#include "SimG4CMS/Forward/interface/CastorNumberingScheme.h"
#include "DataFormats/HcalDetId/interface/HcalCastorDetId.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "CLHEP/Units/GlobalSystemOfUnits.h"
#include "G4LogicalVolumeStore.hh"
#include <iostream>

#define debug

CastorNumberingScheme::CastorNumberingScheme(): lvCAST(0),lvCAES(0),lvCEDS(0),
                                                lvCAHS(0),lvCHDS(0),lvCAER(0),
                                                lvCEDR(0),lvCAHR(0),lvCHDR(0),
                                                lvC3EF(0),lvC3HF(0),lvC4EF(0),
                                                lvC4HF(0) {
  edm::LogInfo("ForwardSim") << "Creating CastorNumberingScheme";
  const G4LogicalVolumeStore * lvs = G4LogicalVolumeStore::GetInstance();
  std::vector<lvp>::const_iterator lvcite;
  for (lvcite = lvs->begin(); lvcite != lvs->end(); lvcite++) {
    if (strcmp(((*lvcite)->GetName()).c_str(),"CAST") == 0) lvCAST = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"CAES") == 0) lvCAES = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"CEDS") == 0) lvCEDS = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"CAHS") == 0) lvCAHS = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"CHDS") == 0) lvCHDS = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"CAER") == 0) lvCAER = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"CEDR") == 0) lvCEDR = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"CAHR") == 0) lvCAHR = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"CHDR") == 0) lvCHDR = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"C3EF") == 0) lvC3EF = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"C3HF") == 0) lvC3HF = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"C4EF") == 0) lvC4EF = (*lvcite);
    if (strcmp(((*lvcite)->GetName()).c_str(),"C4HF") == 0) lvC4HF = (*lvcite);
  }
#ifdef debug
  LogDebug("ForwardSim") << "CastorNumberingScheme:: LogicalVolume pointers\n"
                         << lvCAST << " for CAST; " << lvCAES << " for CAES; "
                         << lvCEDS << " for CEDS; " << lvCAHS << " for CAHS; "
                         << lvCHDS << " for CHDS; " << lvCAER << " for CAER; "
                         << lvCEDR << " for CEDR; " << lvCAHR << " for CAHR; "
                         << lvCHDR << " for CHDR; " << lvC3EF << " for C3EF; "
                         << lvC3HF << " for C3HF; " << lvC4EF << " for C4EF; "
                         << lvC4HF << " for C4HF.";
#endif
}

CastorNumberingScheme::~CastorNumberingScheme() {
  edm::LogInfo("ForwardSim") << "Deleting CastorNumberingScheme";
}

uint32_t CastorNumberingScheme::getUnitID(const G4Step* aStep) const {

  uint32_t intindex = 0;

  uint32_t index=0;
  int      level, copyno[20];
  lvp      lvs[20];
  detectorLevel(aStep, level, copyno, lvs);

#ifdef debug
  LogDebug("ForwardSim") << "CastorNumberingScheme number of levels= " <<level;
#endif

  if (level > 0) {

    int zside   = 0;
    int sector  = 0;
    int module = 0;

    //    HcalCastorDetId::Section section;
     for (int ich=0; ich  <  level; ich++) {
       if(lvs[ich] == lvCAST) {
     // Z index +Z = 1 ; -Z = 2
     zside   = copyno[ich];
       } else if(lvs[ich] == lvCAES || lvs[ich] == lvCEDS) {
     // sector number for dead material 1 - 8
     //section = HcalCastorDetId::EM;
     if (copyno[ich]<5) {sector = 5-copyno[ich] ;
          }else{sector = 13-copyno[ich] ;}  
       } else if(lvs[ich] == lvCAHS || lvs[ich] == lvCHDS) {
     // sector number for dead material 1 - 8
     if (copyno[ich]<5) {sector = 5-copyno[ich] ;
          }else{sector = 13-copyno[ich] ;}
      //section = HcalCastorDetId::HAD;
       } else if(lvs[ich] == lvCAER || lvs[ich] == lvCEDR) {
     // zmodule number 1-2 for EM section (2 copies)
     module = copyno[ich];
       } else if(lvs[ich] == lvCAHR || lvs[ich] == lvCHDR) {
     //zmodule number 3-14 for HAD section (12 copies)
     module = copyno[ich] + 2;
       } else if(lvs[ich] == lvC3EF || lvs[ich] == lvC3HF) {
     // sector number for sensitive material 1 - 16
     sector = sector*2  ;
       } else if(lvs[ich] == lvC4EF || lvs[ich] == lvC4HF) {
     // sector number for sensitive material 1 - 16
     sector = sector*2 -1;
       }
   
    
    
#ifdef debug
      LogDebug("ForwardSim") << "CastorNumberingScheme  " << "ich = " << ich  
                             << "copyno" << copyno[ich] << "name = " 
                             << lvs[ich]->GetName();
#endif
    }
    // use for Castor number 9 
    // 
    // Z index +Z = 1 ; -Z = 2
    // sector number 1 - 16
    // zmodule number  1 - 18


    //    int det = 9; 
    //    intindex = packIndex (det, zside, sector, zmodule);

    //intindex = packIndex (section, zside, sector, module);

    intindex = packIndex(zside, sector, module);

    bool true_for_positive_eta = false;
    if(zside == 1)true_for_positive_eta = true;
    if(zside == -1)true_for_positive_eta = false;

    HcalCastorDetId castorId = HcalCastorDetId(true_for_positive_eta, sector, module);
    index = castorId.rawId();

#ifdef debug
    LogDebug("ForwardSim") << "CastorNumberingScheme :" <<" zside "
                           << zside << " sector " << sector << " module " 
                           << module << " UnitID 0x" << std::hex << intindex 
                           << std::dec;
#endif
  }
  return index;
  
}

//uint32_t CastorNumberingScheme::packIndex(int section, int z, int sector,  int module ) {

uint32_t CastorNumberingScheme::packIndex(int z, int sector, int module) {
  /*
  uint32_t idx=(section&31)<<28;     //bits 28-31   (21-27 are free for now)
  idx+=((z-1)&1)<<20;                //bits  20  (1...2)
  idx+=(sector&15)<<6;               //bits  6-9 (1...16)
  idx+=(module&63);                 //bits  0-5 (1...18)
  return idx;
  */

  uint32_t idx=((z-1)&1)<<8;       //bit 8
  idx+=(sector&15)<<4;             //bits  4-7 (1...16)
  idx+=(module&15);                 //bits  0-3 (1...14)
  return idx;

}

//void CastorNumberingScheme::unpackIndex(const uint32_t& idx, int& section, int& z, int& sector, int& module) {

void CastorNumberingScheme::unpackIndex(const uint32_t& idx, int& z, int& sector, int& module) {
  /*
  section = (idx>>28)&31;
  z   = (idx>>20)&1;
  z  += 1;
  sector = (idx>>6)&15;
  module= (idx&63);
  */
  z   = (idx>>8)&1;
  z  += 1;
  sector = (idx>>4)&15;
  module= (idx&15);
}
  
void CastorNumberingScheme::detectorLevel(const G4Step* aStep, int& level,
                                          int* copyno, lvp* lvs) const {
 
  //Get name and copy numbers
  const G4VTouchable* touch = aStep->GetPreStepPoint()->GetTouchable();
  level = 0;
  if (touch) level = ((touch->GetHistoryDepth())+1);
  if (level > 0) {
    for (int ii = 0; ii < level; ii++) {
      int i      = level - ii - 1;
      lvs[ii]    = touch->GetVolume(i)->GetLogicalVolume();
      copyno[ii] = touch->GetReplicaNumber(i);
    }
  }
}