Detector.cxx

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
 
#include "ITSMFTBase/SegmentationAlpide.h"
#include "ITSMFTSimulation/Hit.h"
#include "ITSBase/GeometryTGeo.h"
#include "ITSBase/ITSBaseParam.h"
#include "ITSSimulation/Detector.h"
#include "ITSSimulation/V3Layer.h"
#include "ITSSimulation/V3Services.h"
#include "ITSSimulation/V3Cage.h"
#include "ITSSimulation/ITSSimParam.h"
 
#include "DetectorsBase/Stack.h"
#include "SimulationDataFormat/TrackReference.h"
#include "fairlogger/Logger.h" // for LOG, LOG_IF
 
// FairRoot includes
#include "FairDetector.h"    // for FairDetector
#include "FairRootManager.h" // for FairRootManager
#include "FairRun.h"         // for FairRun
#include "FairRuntimeDb.h"   // for FairRuntimeDb
#include "FairVolume.h"      // for FairVolume
#include "FairRootManager.h"
 
#include "TGeoManager.h"     // for TGeoManager, gGeoManager
#include "TGeoTube.h"        // for TGeoTube
#include "TGeoPcon.h"        // for TGeoPcon
#include "TGeoVolume.h"      // for TGeoVolume, TGeoVolumeAssembly
#include "TString.h"         // for TString, operator+
#include "TVirtualMC.h"      // for gMC, TVirtualMC
#include "TVirtualMCStack.h" // for TVirtualMCStack
#include "TFile.h"           // for TVirtualMCStack
#include "TGeoParallelWorld.h"
 
#include <cstdio> // for NULL, snprintf
#include <cmath>
 
class FairModule;
 
class TGeoMedium;
 
class TParticle;
 
using std::cout;
using std::endl;
 
using o2::itsmft::Hit;
using Segmentation = o2::itsmft::SegmentationAlpide;
using namespace o2::its;
 
#ifdef ENABLE_UPGRADES
using namespace o2::its3;
#endif
 
Detector::Detector()
  : o2::base::DetImpl<Detector>("ITS", kTRUE),
    mTrackData(),
    /*
    mHitStarted(false),
    mTrkStatusStart(),
    mPositionStart(),
    mMomentumStart(),
    mEnergyLoss(),
    */
    mNumberOfDetectors(-1),
    mModifyGeometry(kFALSE),
    mNumberInnerLayers(3),
    mHits(o2::utils::createSimVector<o2::itsmft::Hit>())
{
  mDescriptorIB = nullptr;
  mNumberLayers = mNumberInnerLayers + sNumberOuterLayers;
}
 
void Detector::configOuterBarrelITS(int nInnerBarrelLayers, int buildLevel)
{
  // build ITS outer barrel detector
  const int kNLr = 4;
  const int kSensTypeID = 0; // dummy id for Alpide sensor
 
  const double ChipThicknessOB = 100.e-4;
 
  const int kRmd = 1;
  const int kNModPerStave = 3;
  const int kPhi0 = 4;
  const int kNStave = 5;
  const int kNPar = 6;
 
  // Radii are from last TDR (ALICE-TDR-017.pdf Tab. 1.1, rMid is mean value)
 
  const double tdr5dat[kNLr][kNPar] = {
    {-1, 19.45, -1, 4., 7.5, 24},  // for others: -, rMid, -, NMod/HStave, phi0, nStaves // 24 was 49
    {-1, 24.40, -1, 4., 6., 30},   // 30 was 61
    {-1, 34.24, -1, 7., 4.29, 42}, // 42 was 88
    {-1, 39.20, -1, 7., 3.75, 48}  // 48 was 100
  };
 
  double rLr, phi0, turbo;
  int nStaveLr, nModPerStaveLr;
 
  const int kNWrapVol = 2;
  const double wrpRMin[kNWrapVol] = {19.2, 33.32};
  const double wrpRMax[kNWrapVol] = {29.14, 44.9};
  const double wrpZSpan[kNWrapVol] = {93., 163.0};
 
  for (int iw = 0; iw < kNWrapVol; iw++) {
    defineWrapperVolume(iw + 1, wrpRMin[iw], wrpRMax[iw], wrpZSpan[iw]); // first wrapper volume managed by DescriptorInnerBarrel
  }
 
  for (int idLr = 0; idLr < kNLr; idLr++) {
    rLr = tdr5dat[idLr][kRmd];
    phi0 = tdr5dat[idLr][kPhi0];
 
    nStaveLr = TMath::Nint(tdr5dat[idLr][kNStave]);
    nModPerStaveLr = TMath::Nint(tdr5dat[idLr][kNModPerStave]);
    defineLayer(idLr + nInnerBarrelLayers, phi0, rLr, nStaveLr, nModPerStaveLr, ChipThicknessOB, Segmentation::SensorLayerThickness,
                kSensTypeID, buildLevel);
  }
}
 
Detector::Detector(Bool_t active, TString name)
  : o2::base::DetImpl<Detector>(name, active),
    mTrackData(),
    /*
    mHitStarted(false),
    mTrkStatusStart(),
    mPositionStart(),
    mMomentumStart(),
    mEnergyLoss(),
    */
    mNumberOfDetectors(-1),
    mModifyGeometry(kFALSE),
    mNumberLayers(sNumberOuterLayers),
    mHits(o2::utils::createSimVector<o2::itsmft::Hit>())
{
  if (name == "ITS") {
    mDescriptorIB = std::make_shared<DescriptorInnerBarrelITS2>(3);
  } else if (name == "IT3") {
#ifdef ENABLE_UPGRADES
    mDescriptorIB = std::make_shared<DescriptorInnerBarrelITS3>();
#endif
  } else {
    LOG(fatal) << "Detector name not supported (options ITS and ITS3)";
  }
 
  auto& param = ITSBaseParam::Instance();
  int buildLevelITS = param.buildLevel;
 
  TString detName = GetName();
  if (detName == "ITS") {
    dynamic_cast<DescriptorInnerBarrelITS2*>(mDescriptorIB.get())->configure(buildLevelITS);
  } else if (detName == "IT3") {
#ifdef ENABLE_UPGRADES
    dynamic_cast<DescriptorInnerBarrelITS3*>(mDescriptorIB.get())->configure();
#endif
  }
 
  mNumberInnerLayers = mDescriptorIB->getNumberOfLayers();
  mNumberLayers = mNumberInnerLayers + sNumberOuterLayers;
 
  mLayerName.resize(mNumberLayers);
  mTurboLayer.resize(mNumberLayers);
  mLayerPhi0.resize(mNumberLayers);
  mLayerRadii.resize(mNumberLayers);
  mStavePerLayer.resize(mNumberLayers);
  mUnitPerStave.resize(mNumberLayers);
  mChipThickness.resize(mNumberLayers);
  mStaveWidth.resize(mNumberLayers);
  mStaveTilt.resize(mNumberLayers);
  mDetectorThickness.resize(mNumberLayers);
  mChipTypeID.resize(mNumberLayers);
  mBuildLevel.resize(mNumberLayers);
  mGeometry.resize(mNumberLayers);
  mWrapperLayerId.resize(mNumberLayers);
 
  for (int j{0}; j < mNumberLayers; j++) {
    if (detName == "IT3" && j < mNumberInnerLayers) {
      mLayerName[j].Form("%s%d", GeometryTGeo::getITS3SensorPattern(), j);
    } else {
      mLayerName[j].Form("%s%d", GeometryTGeo::getITSSensorPattern(), j); // See V3Layer
    }
    LOGP(debug, "{}: mLayerName={}", j, mLayerName[j].Data());
  }
 
  if (mNumberLayers > 0) { // if not, we'll Fatal-ize in CreateGeometry
    for (Int_t j = 0; j < mNumberLayers; j++) {
      mLayerPhi0[j] = 0;
      mLayerRadii[j] = 0.;
      mStavePerLayer[j] = 0;
      mUnitPerStave[j] = 0;
      mChipThickness[j] = 0.;
      mStaveWidth[j] = 0.;
      mStaveTilt[j] = 0.;
      mDetectorThickness[j] = 0.;
      mChipTypeID[j] = 0;
      mBuildLevel[j] = 0;
      mGeometry[j] = nullptr;
    }
  }
  mServicesGeometry = nullptr;
 
  for (int i = sNumberOfWrapperVolumes; i--;) {
    mWrapperMinRadius[i] = mWrapperMaxRadius[i] = mWrapperZSpan[i] = -1;
  }
 
  configOuterBarrelITS(mNumberInnerLayers, buildLevelITS);
}
 
Detector::Detector(const Detector& rhs)
  : o2::base::DetImpl<Detector>(rhs),
    mTrackData(),
    /*
    mHitStarted(false),
    mTrkStatusStart(),
    mPositionStart(),
    mMomentumStart(),
    mEnergyLoss(),
    */
    mNumberOfDetectors(rhs.mNumberOfDetectors),
    mModifyGeometry(rhs.mModifyGeometry),
 
    mHits(o2::utils::createSimVector<o2::itsmft::Hit>())
{
  mDescriptorIB = rhs.mDescriptorIB;
  mNumberInnerLayers = rhs.mNumberInnerLayers;
  mNumberLayers = rhs.mNumberLayers;
  mLayerName.resize(mNumberLayers);
 
  TString detName = rhs.GetName();
  for (int j{0}; j < mNumberLayers; j++) {
    if (detName == "IT3" && j < mNumberInnerLayers) {
      mLayerName[j].Form("%s%d", GeometryTGeo::getITS3SensorPattern(), j); // See V3Layer
    } else {
      mLayerName[j].Form("%s%d", GeometryTGeo::getITSSensorPattern(), j); // See V3Layer
    }
  }
}
 
Detector::~Detector()
{
 
  if (mHits) {
    // delete mHits;
    o2::utils::freeSimVector(mHits);
  }
}
 
Detector& Detector::operator=(const Detector& rhs)
{
  // The standard = operator
  // Inputs:
  //   Detector   &h the sourse of this copy
  // Outputs:
  //   none.
  // Return:
  //  A copy of the sourse hit h
 
  if (this == &rhs) {
    return *this;
  }
 
  // base class assignment
  base::Detector::operator=(rhs);
 
  mNumberOfDetectors = rhs.mNumberOfDetectors;
 
  mModifyGeometry = rhs.mModifyGeometry;
 
  mHits = nullptr;
 
  mDescriptorIB = rhs.mDescriptorIB;
 
  mNumberInnerLayers = rhs.mNumberInnerLayers;
  mNumberLayers = rhs.mNumberLayers;
  mLayerName.resize(mNumberLayers);
 
  TString detName = rhs.GetName();
  for (Int_t j = 0; j < mNumberLayers; j++) {
    if (detName == "IT3" && j < mNumberInnerLayers) {
      mLayerName[j].Form("%s%d", GeometryTGeo::getITS3SensorPattern(), j); // See V3Layer
    } else {
      mLayerName[j].Form("%s%d", GeometryTGeo::getITSSensorPattern(), j); // See V3Layer
    }
  }
 
  return *this;
}
 
void Detector::InitializeO2Detector()
{
  // Define the list of sensitive volumes
  defineSensitiveVolumes();
 
  mLayerID.resize(mNumberLayers);
  for (int i = 0; i < mNumberLayers; i++) {
    mLayerID[i] = gMC ? TVirtualMC::GetMC()->VolId(mLayerName[i]) : 0;
  }
 
  mGeometryTGeo = GeometryTGeo::Instance();
  //  FairRuntimeDb* rtdb= FairRun::Instance()->GetRuntimeDb();
  //  O2itsGeoPar* par=(O2itsGeoPar*)(rtdb->getContainer("O2itsGeoPar"));
}
 
Bool_t Detector::ProcessHits(FairVolume* vol)
{
  // This method is called from the MC stepping
  if (!(fMC->TrackCharge())) {
    return kFALSE;
  }
 
  Int_t lay = 0, volID = vol->getMCid();
 
  // FIXME: Determine the layer number. Is this information available directly from the FairVolume?
  bool notSens = false;
  while ((lay < mNumberLayers) && (notSens = (volID != mLayerID[lay]))) {
    ++lay;
  }
  if (notSens) {
    return kFALSE; // RS: can this happen? This method must be called for sensors only?
  }
 
  // Is it needed to keep a track reference when the outer ITS volume is encountered?
  auto stack = (o2::data::Stack*)fMC->GetStack();
  if (fMC->IsTrackExiting()) {
    // Keep the track refs for the innermost and outermost layers only
    o2::TrackReference tr(*fMC, GetDetId());
    tr.setTrackID(stack->GetCurrentTrackNumber());
    tr.setUserId(lay);
    stack->addTrackReference(tr);
  }
  bool startHit = false, stopHit = false;
  unsigned char status = 0;
  if (fMC->IsTrackEntering()) {
    status |= Hit::kTrackEntering;
  }
  if (fMC->IsTrackInside()) {
    status |= Hit::kTrackInside;
  }
  if (fMC->IsTrackExiting()) {
    status |= Hit::kTrackExiting;
  }
  if (fMC->IsTrackOut()) {
    status |= Hit::kTrackOut;
  }
  if (fMC->IsTrackStop()) {
    status |= Hit::kTrackStopped;
  }
  if (fMC->IsTrackAlive()) {
    status |= Hit::kTrackAlive;
  }
 
  // track is entering or created in the volume
  if ((status & Hit::kTrackEntering) || (status & Hit::kTrackInside && !mTrackData.mHitStarted)) {
    startHit = true;
  } else if ((status & (Hit::kTrackExiting | Hit::kTrackOut | Hit::kTrackStopped))) {
    stopHit = true;
  }
 
  // increment energy loss at all steps except entrance
  if (!startHit) {
    mTrackData.mEnergyLoss += fMC->Edep();
  }
  if (!(startHit | stopHit)) {
    return kFALSE; // do noting
  }
 
  if (startHit) {
    mTrackData.mEnergyLoss = 0.;
    fMC->TrackMomentum(mTrackData.mMomentumStart);
    fMC->TrackPosition(mTrackData.mPositionStart);
    mTrackData.mTrkStatusStart = status;
    mTrackData.mHitStarted = true;
  }
  if (stopHit) {
    TLorentzVector positionStop;
    fMC->TrackPosition(positionStop);
    // Retrieve the indices with the volume path
    int halfbarrel(0), stave(0), halfstave(0), chipinmodule(0), module(0);
    fMC->CurrentVolOffID(1, chipinmodule);
    fMC->CurrentVolOffID(2, module);
    fMC->CurrentVolOffID(3, halfstave);
    fMC->CurrentVolOffID(4, stave);
    fMC->CurrentVolOffID(5, halfbarrel);
    int chipindex = mGeometryTGeo->getChipIndex(lay, halfbarrel, stave, halfstave, module, chipinmodule);
 
    Hit* p = addHit(stack->GetCurrentTrackNumber(), chipindex, mTrackData.mPositionStart.Vect(), positionStop.Vect(),
                    mTrackData.mMomentumStart.Vect(), mTrackData.mMomentumStart.E(), positionStop.T(),
                    mTrackData.mEnergyLoss, mTrackData.mTrkStatusStart, status);
    // p->SetTotalEnergy(vmc->Etot());
 
    // RS: not sure this is needed
    // Increment number of Detector det points in TParticle
    stack->addHit(GetDetId());
  }
 
  return kTRUE;
}
 
void Detector::createMaterials()
{
  Int_t ifield = 2;
  Float_t fieldm = 10.0;
  o2::base::Detector::initFieldTrackingParams(ifield, fieldm);
 
  Float_t tmaxfd = 0.1;   // 1.0; // Degree
  Float_t stemax = 1.0;   // cm
  Float_t deemax = 0.1;   // 30.0; // Fraction of particle's energy 0<deemax<=1
  Float_t epsil = 1.0E-4; // 1.0; // cm
  Float_t stmin = 0.0;    // cm "Default value used"
 
  Float_t tmaxfdSi = 0.1;    // .10000E+01; // Degree
  Float_t stemaxSi = 0.0075; //  .10000E+01; // cm
  Float_t deemaxSi = 0.1;    // 0.30000E-02; // Fraction of particle's energy 0<deemax<=1
  Float_t epsilSi = 1.0E-4;  // .10000E+01;
  Float_t stminSi = 0.0;     // cm "Default value used"
 
  Float_t tmaxfdAir = 0.1;        // .10000E+01; // Degree
  Float_t stemaxAir = .10000E+01; // cm
  Float_t deemaxAir = 0.1;        // 0.30000E-02; // Fraction of particle's energy 0<deemax<=1
  Float_t epsilAir = 1.0E-4;      // .10000E+01;
  Float_t stminAir = 0.0;         // cm "Default value used"
 
  // AIR
  Float_t aAir[4] = {12.0107, 14.0067, 15.9994, 39.948};
  Float_t zAir[4] = {6., 7., 8., 18.};
  Float_t wAir[4] = {0.000124, 0.755267, 0.231781, 0.012827};
  Float_t dAir = 1.20479E-3;
 
  // Water
  Float_t aWater[2] = {1.00794, 15.9994};
  Float_t zWater[2] = {1., 8.};
  Float_t wWater[2] = {0.111894, 0.888106};
  Float_t dWater = 1.0;
 
  // PEEK CF30
  Float_t aPEEK[3] = {12.0107, 1.00794, 15.9994};
  Float_t zPEEK[3] = {6., 1., 8.};
  Float_t wPEEK[3] = {19., 12., 3};
  Float_t dPEEK = 1.32;
 
  // Kapton
  Float_t aKapton[4] = {1.00794, 12.0107, 14.010, 15.9994};
  Float_t zKapton[4] = {1., 6., 7., 8.};
  Float_t wKapton[4] = {0.026362, 0.69113, 0.07327, 0.209235};
  Float_t dKapton = 1.42;
 
  // Tungsten Carbide
  Float_t aWC[2] = {183.84, 12.0107};
  Float_t zWC[2] = {74, 6};
  Float_t wWC[2] = {0.5, 0.5};
  Float_t dWC = 15.63;
 
  // BEOL (Metal interconnection stack in Si sensors)
  Float_t aBEOL[3] = {26.982, 28.086, 15.999};
  Float_t zBEOL[3] = {13, 14, 8}; // Al, Si, O
  Float_t wBEOL[3] = {0.170, 0.388, 0.442};
  Float_t dBEOL = 2.28;
 
  // Inox 304
  Float_t aInox304[4] = {12.0107, 51.9961, 58.6928, 55.845};
  Float_t zInox304[4] = {6., 24., 28, 26};       // C, Cr, Ni, Fe
  Float_t wInox304[4] = {0.0003, 0.18, 0.10, 0}; // [3] will be computed
  Float_t dInox304 = 7.85;
 
  // Ceramic (for IB capacitors) (BaTiO3)
  // Density includes soldering
  Float_t aCeramic[3] = {137.327, 47.867, 15.999};
  Float_t zCeramic[3] = {56, 22, 8}; // Ba, Ti, O
  Float_t wCeramic[3] = {1, 1, 3};   // Molecular composition
  Float_t dCeramic = 8.28;
 
  // Rohacell (C9 H13 N1 O2)
  Float_t aRohac[4] = {12.01, 1.01, 14.010, 16.};
  Float_t zRohac[4] = {6., 1., 7., 8.};
  Float_t wRohac[4] = {9., 13., 1., 2.};
  Float_t dRohac = 0.05;
 
  // Rohacell RIST 110
  Float_t dRist = 0.11;
 
  // EN AW 7075 (Al alloy with Cu Mg Zn)
  Float_t aENAW7075[4] = {26.98, 63.55, 24.31, 65.41};
  Float_t zENAW7075[4] = {13., 29., 12., 30.};
  Float_t wENAW7075[4] = {0., 0.015, 0.025, 0.055}; // [0] will be computed
  Float_t dENAW7075 = 2.85;
 
  // Brass CuZn39Pb3 (Cu Zn Pb)
  Float_t aBrass[3] = {63.55, 65.41, 207.2};
  Float_t zBrass[3] = {29., 30., 82.};
  Float_t wBrass[3] = {0.58, 0.39, 0.03};
  Float_t dBrass = 8.46;
 
  // Polymer for ITS services
  Float_t aPoly[2] = {12.01, 1.};
  Float_t zPoly[2] = {6., 1.};
  Float_t wPoly[2] = {0.857, .143};
  Float_t dPoly = 0.9;
 
  // Vespel for Beam Pipe Support (same definition of Polyimide in Pipe.cxx)
  Float_t aVesp[4] = {16., 14., 12., 1.};
  Float_t zVesp[4] = {8., 7., 6., 1.};
  Float_t wVesp[4] = {5., 2., 22., 10.};
  Float_t dVesp = 1.42;
 
  o2::base::Detector::Mixture(1, "AIR$", aAir, zAir, dAir, 4, wAir);
  o2::base::Detector::Medium(1, "AIR$", 1, 0, ifield, fieldm, tmaxfdAir, stemaxAir, deemaxAir, epsilAir, stminAir);
 
  o2::base::Detector::Mixture(2, "WATER$", aWater, zWater, dWater, 2, wWater);
  o2::base::Detector::Medium(2, "WATER$", 2, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  o2::base::Detector::Material(3, "SI$", 0.28086E+02, 0.14000E+02, 0.23300E+01, 0.93600E+01, 0.99900E+03);
  o2::base::Detector::Medium(3, "SI$", 3, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  o2::base::Detector::Material(4, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7); // From AliPIPEv3
  o2::base::Detector::Medium(4, "BERILLIUM$", 4, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  o2::base::Detector::Material(5, "COPPER$", 0.63546E+02, 0.29000E+02, 0.89600E+01, 0.14300E+01, 0.99900E+03);
  o2::base::Detector::Medium(5, "COPPER$", 5, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  // needed for STAVE , Carbon, kapton, Epoxy, flexcable
 
  // AliceO2::Base::Detector::Material(6,"CARBON$",12.0107,6,2.210,999,999);
  o2::base::Detector::Material(6, "CARBON$", 12.0107, 6, 2.210 / 1.3, 999, 999);
  o2::base::Detector::Medium(6, "CARBON$", 6, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  o2::base::Detector::Mixture(7, "KAPTON(POLYCH2)$", aKapton, zKapton, dKapton, 4, wKapton);
  o2::base::Detector::Medium(7, "KAPTON(POLYCH2)$", 7, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  // values below modified as compared to source AliITSv11 !
 
  // BEOL (Metal interconnection stack in Si sensors)
  o2::base::Detector::Mixture(29, "METALSTACK$", aBEOL, zBEOL, dBEOL, 3, wBEOL);
  o2::base::Detector::Medium(29, "METALSTACK$", 29, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  // Glue between IB chip and FPC: density reduced to take into account
  // empty spaces (160 glue spots/chip , diam. 1 spot = 1 mm)
  o2::base::Detector::Material(30, "GLUE_IBFPC$", 12.011, 6, 1.05 * 0.3, 999, 999);
  o2::base::Detector::Medium(30, "GLUE_IBFPC$", 30, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  // Ceramic for IB capacitors (nmat < 0 => wmat contains number of atoms)
  o2::base::Detector::Mixture(31, "CERAMIC$", aCeramic, zCeramic, dCeramic, -3, wCeramic);
  o2::base::Detector::Medium(31, "CERAMIC$", 31, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  // All types of carbon
  // Unidirectional prepreg
  o2::base::Detector::Material(8, "K13D2U2k$", 12.0107, 6, 1.643, 999, 999);
  o2::base::Detector::Medium(8, "K13D2U2k$", 8, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
  o2::base::Detector::Material(17, "K13D2U120$", 12.0107, 6, 1.583, 999, 999);
  o2::base::Detector::Medium(17, "K13D2U120$", 17, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
  // Carbon prepreg woven
  o2::base::Detector::Material(18, "F6151B05M$", 12.0107, 6, 2.133, 999, 999);
  o2::base::Detector::Medium(18, "F6151B05M$", 18, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
  // Impregnated thread
  o2::base::Detector::Material(9, "M60J3K$", 12.0107, 6, 2.21, 999, 999);
  o2::base::Detector::Medium(9, "M60J3K$", 9, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
  // Impregnated thread
  o2::base::Detector::Material(10, "M55J6K$", 12.0107, 6, 1.63, 999, 999);
  o2::base::Detector::Medium(10, "M55J6K$", 10, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
  // Fabric(0/90)
  o2::base::Detector::Material(11, "T300$", 12.0107, 6, 1.725, 999, 999);
  o2::base::Detector::Medium(11, "T300$", 11, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
  // AMEC Thermasol
  o2::base::Detector::Material(12, "FGS003$", 12.0107, 6, 1.6, 999, 999);
  o2::base::Detector::Medium(12, "FGS003$", 12, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
  // Carbon fleece
  o2::base::Detector::Material(13, "CarbonFleece$", 12.0107, 6, 0.4, 999, 999);
  o2::base::Detector::Medium(13, "CarbonFleece$", 13, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
  // AS4C 200 gsm EX1515
  o2::base::Detector::Material(37, "AS4C200$", 12.0107, 6, 1.48, 999, 999);
  o2::base::Detector::Medium(37, "AS4C200$", 37, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // Rohacell (various types)
  o2::base::Detector::Mixture(32, "ROHACELL$", aRohac, zRohac, dRohac, -4, wRohac);
  o2::base::Detector::Medium(32, "ROHACELL$", 32, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  o2::base::Detector::Mixture(38, "RIST110$", aRohac, zRohac, dRist, -4, wRohac);
  o2::base::Detector::Medium(38, "RIST110$", 38, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // Carbon prepreg (Cage)
  o2::base::Detector::Material(33, "M46J6K$", 12.0107, 6, 1.48, 999, 999);
  o2::base::Detector::Medium(33, "M46J6K$", 33, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // PEEK CF30
  o2::base::Detector::Mixture(19, "PEEKCF30$", aPEEK, zPEEK, dPEEK, -3, wPEEK);
  o2::base::Detector::Medium(19, "PEEKCF30$", 19, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // Flex cable
  Float_t aFCm[5] = {12.0107, 1.00794, 14.0067, 15.9994, 26.981538};
  Float_t zFCm[5] = {6., 1., 7., 8., 13.};
  Float_t wFCm[5] = {0.520088819984, 0.01983871336, 0.0551367996, 0.157399667056, 0.247536};
  // Float_t dFCm = 1.6087;  // original
  // Float_t dFCm = 2.55;   // conform with STAR
  Float_t dFCm = 2.595; // conform with Corrado
 
  o2::base::Detector::Mixture(14, "FLEXCABLE$", aFCm, zFCm, dFCm, 5, wFCm);
  o2::base::Detector::Medium(14, "FLEXCABLE$", 14, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  // AliceO2::Base::Detector::Material(7,"GLUE$",0.12011E+02,0.60000E+01,0.1930E+01/2.015,999,999);
  // // original
  o2::base::Detector::Material(15, "GLUE$", 12.011, 6, 1.93 / 2.015, 999, 999); // conform with ATLAS, Corrado, Stefan
  o2::base::Detector::Medium(15, "GLUE$", 15, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  o2::base::Detector::Material(16, "ALUMINUM$", 0.26982E+02, 0.13000E+02, 0.26989E+01, 0.89000E+01, 0.99900E+03);
  o2::base::Detector::Medium(16, "ALUMINUM$", 16, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);
 
  o2::base::Detector::Mixture(20, "TUNGCARB$", aWC, zWC, dWC, 2, wWC);
  o2::base::Detector::Medium(20, "TUNGCARB$", 20, 0, ifield, fieldm, tmaxfd, stemax, deemaxSi, epsilSi, stminSi);
 
  wInox304[3] = 1. - wInox304[0] - wInox304[1] - wInox304[2];
  o2::base::Detector::Mixture(21, "INOX304$", aInox304, zInox304, dInox304, 4, wInox304);
  o2::base::Detector::Medium(21, "INOX304$", 21, 0, ifield, fieldm, tmaxfd, stemax, deemaxSi, epsilSi, stminSi);
 
  // Tungsten (for gamma converter rods)
  o2::base::Detector::Material(28, "TUNGSTEN$", 183.84, 74, 19.25, 999, 999);
  o2::base::Detector::Medium(28, "TUNGSTEN$", 28, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // EN AW 7075 (Al alloy with Cu Mg Zn) (for Cage rails)
  wENAW7075[0] = 1. - wENAW7075[1] - wENAW7075[2] - wENAW7075[3];
  o2::base::Detector::Mixture(36, "ENAW7075$", aENAW7075, zENAW7075, dENAW7075, 4, wENAW7075);
  o2::base::Detector::Medium(36, "ENAW7075$", 36, 0, ifield, fieldm, tmaxfd, stemax, deemaxSi, epsilSi, stminSi);
 
  // Brass CuZn39Pb3
  o2::base::Detector::Mixture(34, "BRASS$", aBrass, zBrass, dBrass, 3, wBrass);
  o2::base::Detector::Medium(34, "BRASS$", 34, 0, ifield, fieldm, tmaxfd, stemax, deemaxSi, epsilSi, stminSi);
 
  // Titanium
  o2::base::Detector::Material(35, "TITANIUM$", 47.867, 22, 4.506, 999, 999);
  o2::base::Detector::Medium(35, "TITANIUM$", 35, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // Carbon-Fiber-Reinforced Polymer
  o2::base::Detector::Material(43, "CFRP$", 12.01, 6, 1.55, 999, 999);
  o2::base::Detector::Medium(43, "CFRP$", 43, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // Vespel for Beam Pipe Support
  o2::base::Detector::Mixture(44, "VESPEL$", aVesp, zVesp, dVesp, -4, wVesp);
  o2::base::Detector::Medium(44, "VESPEL$", 44, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // Carbon for ITS services
  o2::base::Detector::Material(41, "C4SERVICES$", 12.01, 6, 1.75, 999, 999);
  o2::base::Detector::Medium(41, "C4SERVICES$", 41, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // Polymer for ITS services
  o2::base::Detector::Mixture(42, "POLY4SERVICES$", aPoly, zPoly, dPoly, 2, wPoly);
  o2::base::Detector::Medium(42, "POLY4SERVICES$", 42, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // For ITS3
 
  // Araldite 2011
  Float_t dAraldite = 1.05;
 
  // ERG Duocel
  o2::base::Detector::Material(39, "ERGDUOCEL$", 12.0107, 6, 0.06, 999, 999);
  o2::base::Detector::Medium(39, "ERGDUOCEL$", 39, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
 
  // Impregnated carbon fleece
  // (as educated guess we assume 50% carbon fleece 50% Araldite glue)
  o2::base::Detector::Material(40, "IMPREG_FLEECE$", 12.0107, 6, 0.5 * (dAraldite + 0.4), 999, 999);
  o2::base::Detector::Medium(40, "IMPREG_FLEECE$", 40, 0, ifield, fieldm, tmaxfdSi, stemaxSi, deemaxSi, epsilSi, stminSi);
}
 
void Detector::EndOfEvent() { Reset(); }
 
void Detector::Register()
{
  // This will create a branch in the output tree called Hit, setting the last
  // parameter to kFALSE means that this collection will not be written to the file,
  // it will exist only during the simulation
 
  if (FairRootManager::Instance()) {
    FairRootManager::Instance()->RegisterAny(addNameTo("Hit").data(), mHits, kTRUE);
  }
}
 
void Detector::Reset()
{
  if (!o2::utils::ShmManager::Instance().isOperational()) {
    mHits->clear();
  }
}
 
void Detector::defineWrapperVolume(Int_t id, Double_t rmin, Double_t rmax, Double_t zspan)
{
  // set parameters of id-th wrapper volume
  if (id >= sNumberOfWrapperVolumes || id < 0) {
    LOG(fatal) << "id " << id << " of wrapper volume is not in 0-" << sNumberOfWrapperVolumes - 1 << " range";
  }
 
  mWrapperMinRadius[id] = rmin;
  mWrapperMaxRadius[id] = rmax;
  mWrapperZSpan[id] = zspan;
}
 
void Detector::defineLayer(Int_t nlay, Double_t phi0, Double_t r, Int_t nstav, Int_t nunit, Double_t lthick,
                           Double_t dthick, UInt_t dettypeID, Int_t buildLevel)
{
  //     Sets the layer parameters
  // Inputs:
  //          nlay    layer number
  //          phi0    layer phi0
  //          r       layer radius
  //          nstav   number of staves
  //          nunit   IB: number of chips per stave
  //                  OB: number of modules per half stave
  //          lthick  stave thickness (if omitted, defaults to 0)
  //          dthick  detector thickness (if omitted, defaults to 0)
  //          dettypeID  ??
  //          buildLevel (if 0, all geometry is build, used for material budget studies)
  // Outputs:
  //   none.
  // Return:
  //   none.
 
  LOG(debug) << "L# " << nlay << " Phi:" << phi0 << " R:" << r << " Nst:" << nstav << " Nunit:" << nunit
             << " Lthick:" << lthick << " Dthick:" << dthick << " DetID:" << dettypeID << " B:" << buildLevel;
 
  if (nlay >= mNumberLayers || nlay < 0) {
    LOG(error) << "Wrong layer number " << nlay;
    return;
  }
 
  mTurboLayer[nlay] = kFALSE;
  mLayerPhi0[nlay] = phi0;
  mLayerRadii[nlay] = r;
  mStavePerLayer[nlay] = nstav;
  mUnitPerStave[nlay] = nunit;
  mChipThickness[nlay] = lthick;
  mDetectorThickness[nlay] = dthick;
  mChipTypeID[nlay] = dettypeID;
  mBuildLevel[nlay] = buildLevel;
}
 
void Detector::getLayerParameters(Int_t nlay, Double_t& phi0, Double_t& r, Int_t& nstav, Int_t& nmod, Double_t& width,
                                  Double_t& tilt, Double_t& lthick, Double_t& dthick, UInt_t& dettype) const
{
  //     Gets the layer parameters
  // Inputs:
  //          nlay    layer number
  // Outputs:
  //          phi0    phi of 1st stave
  //          r       layer radius
  //          nstav   number of staves
  //          nmod    IB: number of chips per stave
  //                  OB: number of modules per half stave
  //          width   stave width
  //          tilt    stave tilt angle
  //          lthick  stave thickness
  //          dthick  detector thickness
  //          dettype detector type
  // Return:
  //   none.
 
  if (nlay >= mNumberLayers || nlay < 0) {
    LOG(error) << "Wrong layer number " << nlay;
    return;
  }
 
  phi0 = mLayerPhi0[nlay];
  r = mLayerRadii[nlay];
  nstav = mStavePerLayer[nlay];
  nmod = mUnitPerStave[nlay];
  width = mStaveWidth[nlay];
  tilt = mStaveTilt[nlay];
  lthick = mChipThickness[nlay];
  dthick = mDetectorThickness[nlay];
  dettype = mChipTypeID[nlay];
}
 
TGeoVolume* Detector::createWrapperVolume(Int_t id)
{
  // Creates an air-filled wrapper cylindrical volume
  // For OB a Pcon is needed to host the support rings
  // while avoiding overlaps with MFT structures and OB cones
 
  const Double_t suppRingAZlen = 4.;
  const Double_t coneRingARmax = 33.96;
  const Double_t coneRingAZlen[2] = {5.6, 0.3};
  const Double_t suppRingCZlen[3] = {4.8, 4.0, 2.1};
  const Double_t suppRingsRmin[3] = {23.35, 20.05, 35.4};
 
  if (id > 0 && (mWrapperMinRadius[id] < 0 || mWrapperMaxRadius[id] < 0 || mWrapperZSpan[id] < 0)) { // check only for OB, IB managed in DescriptorInnerBarrel
    LOG(fatal) << "Wrapper volume " << id << " was requested but not defined";
  }
 
  // Now create the actual shape and volume
  TGeoShape* tube = nullptr;
  Double_t zlen;
  switch (id) {
    case 0: // IB Layer 0,1,2: simple cylinder
    {
      tube = (TGeoShape*)mDescriptorIB->defineWrapperVolume();
    } break;
    case 1: // MB Layer 3,4: complex Pcon to avoid MFT overlaps
    {
      TGeoPcon* wrap = new TGeoPcon(0, 360, 6);
      zlen = mWrapperZSpan[id] / 2 + suppRingCZlen[0];
      wrap->DefineSection(0, -zlen, suppRingsRmin[0], mWrapperMaxRadius[id]);
      zlen = mWrapperZSpan[id] / 2 + suppRingCZlen[1];
      wrap->DefineSection(1, -zlen, suppRingsRmin[0], mWrapperMaxRadius[id]);
      wrap->DefineSection(2, -zlen, suppRingsRmin[1], mWrapperMaxRadius[id]);
      wrap->DefineSection(3, -mWrapperZSpan[id] / 2., suppRingsRmin[1], mWrapperMaxRadius[id]);
      wrap->DefineSection(4, -mWrapperZSpan[id] / 2., mWrapperMinRadius[id], mWrapperMaxRadius[id]);
      zlen = mWrapperZSpan[id] / 2 + suppRingAZlen;
      wrap->DefineSection(5, zlen, mWrapperMinRadius[id], mWrapperMaxRadius[id]);
      tube = (TGeoShape*)wrap;
    } break;
    case 2: // OB Layer 5,6: simpler Pcon to avoid OB cones overlaps
    {
      TGeoPcon* wrap = new TGeoPcon(0, 360, 6);
      zlen = mWrapperZSpan[id] / 2;
      wrap->DefineSection(0, -zlen, suppRingsRmin[2], mWrapperMaxRadius[id]);
      zlen -= suppRingCZlen[2];
      wrap->DefineSection(1, -zlen, suppRingsRmin[2], mWrapperMaxRadius[id]);
      wrap->DefineSection(2, -zlen, mWrapperMinRadius[id], mWrapperMaxRadius[id]);
      zlen = mWrapperZSpan[id] / 2 - coneRingAZlen[0];
      wrap->DefineSection(3, zlen, mWrapperMinRadius[id], mWrapperMaxRadius[id]);
      wrap->DefineSection(4, zlen, coneRingARmax, mWrapperMaxRadius[id]);
      zlen = mWrapperZSpan[id] / 2 + coneRingAZlen[1];
      wrap->DefineSection(5, zlen, coneRingARmax, mWrapperMaxRadius[id]);
      tube = (TGeoShape*)wrap;
    } break;
    default: // Can never happen, keeps gcc quiet
      break;
  }
 
  TGeoMedium* medAir = gGeoManager->GetMedium(Form("%s_AIR$", GetName()));
 
  char volnam[30];
  snprintf(volnam, 29, "%s%d", GeometryTGeo::getITSWrapVolPattern(), id);
 
  auto* wrapper = new TGeoVolume(volnam, tube, medAir);
 
  return wrapper;
}
 
void Detector::ConstructGeometry()
{
  // Create the detector materials
  createMaterials();
 
  // Construct the detector geometry
  constructDetectorGeometry();
}
 
void Detector::constructDetectorGeometry()
{
  // Create the geometry and insert it in the mother volume ITSV
  TGeoManager* geoManager = gGeoManager;
 
  TGeoVolume* vALIC = geoManager->GetVolume("barrel");
 
  if (!vALIC) {
    LOG(fatal) << "Could not find the top volume";
  }
 
  new TGeoVolumeAssembly(GeometryTGeo::getITSVolPattern());
  TGeoVolume* vITSV = geoManager->GetVolume(GeometryTGeo::getITSVolPattern());
  vALIC->AddNode(vITSV, 2, new TGeoTranslation(0, 30., 0)); // Copy number is 2 to cheat AliGeoManager::CheckSymNamesLUT
 
  const Int_t kLength = 100;
  Char_t vstrng[kLength] = "xxxRS"; //?
  vITSV->SetTitle(vstrng);
 
  // Check that we have all needed parameters for OB (no need IB, which is managed by the DescriptorInnerBarrel)
  for (Int_t j = mNumberInnerLayers; j < mNumberLayers; j++) {
    if (mLayerRadii[j] <= 0) {
      LOG(fatal) << "Wrong layer radius for layer " << j << "(" << mLayerRadii[j] << ")";
    }
    if (mStavePerLayer[j] <= 0) {
      LOG(fatal) << "Wrong number of staves for layer " << j << "(" << mStavePerLayer[j] << ")";
    }
    if (mUnitPerStave[j] <= 0) {
      LOG(fatal) << "Wrong number of chips for layer " << j << "(" << mUnitPerStave[j] << ")";
    }
    if (mChipThickness[j] < 0) {
      LOG(fatal) << "Wrong chip thickness for layer " << j << "(" << mChipThickness[j] << ")";
    }
    if (mTurboLayer[j] && mStaveWidth[j] <= 0) {
      LOG(fatal) << "Wrong stave width for layer " << j << "(" << mStaveWidth[j] << ")";
    }
    if (mDetectorThickness[j] < 0) {
      LOG(fatal) << "Wrong Sensor thickness for layer " << j << "(" << mDetectorThickness[j] << ")";
    }
 
    if (j > 0) {
      if (mLayerRadii[j] <= mLayerRadii[j - 1]) {
        LOG(fatal) << "Layer " << j << " radius (" << mLayerRadii[j] << ") is smaller than layer " << j - 1
                   << " radius (" << mLayerRadii[j - 1] << ")";
      }
    }
 
    if (mChipThickness[j] == 0) {
      LOG(info) << "Chip thickness for layer " << j << " not set, using default";
    }
  }
 
  // Create the wrapper volumes
  TGeoVolume** wrapVols = nullptr;
 
  if (sNumberOfWrapperVolumes) {
    wrapVols = new TGeoVolume*[sNumberOfWrapperVolumes];
    for (int id = 0; id < sNumberOfWrapperVolumes; id++) {
      wrapVols[id] = createWrapperVolume(id);
      vITSV->AddNode(wrapVols[id], 1, nullptr);
    }
  }
 
  // Now create the actual geometry
  for (Int_t j = 0; j < mNumberLayers; j++) {
 
    if (j < mNumberInnerLayers) {
      TString detName = GetName();
      if (detName == "ITS") {
        mGeometry[j] = ((DescriptorInnerBarrelITS2*)mDescriptorIB.get())->createLayer(j, wrapVols[0]); // define IB layers on first wrapper volume always
      } else if (detName == "IT3") {
#ifdef ENABLE_UPGRADES
        ((DescriptorInnerBarrelITS3*)mDescriptorIB.get())->createLayer(j, wrapVols[0]); // define IB layers on first wrapper volume always
#endif
      }
      mWrapperLayerId[j] = 0;
    } else {
      TGeoVolume* dest = vITSV;
      mWrapperLayerId[j] = -1;
 
      if (mTurboLayer[j]) {
        mGeometry[j] = new V3Layer(j, kTRUE, kFALSE, GetName());
        mGeometry[j]->setStaveWidth(mStaveWidth[j]);
        mGeometry[j]->setStaveTilt(mStaveTilt[j]);
      } else {
        mGeometry[j] = new V3Layer(j, kFALSE, kFALSE, GetName());
      }
 
      mGeometry[j]->setPhi0(mLayerPhi0[j]);
      mGeometry[j]->setRadius(mLayerRadii[j]);
      mGeometry[j]->setNumberOfStaves(mStavePerLayer[j]);
      mGeometry[j]->setNumberOfUnits(mUnitPerStave[j]);
      mGeometry[j]->setChipType(mChipTypeID[j]);
      mGeometry[j]->setBuildLevel(mBuildLevel[j]);
 
      mGeometry[j]->setStaveModel(V3Layer::kOBModel2);
 
      LOG(debug1) << "mBuildLevel: " << mBuildLevel[j];
 
      if (mChipThickness[j] != 0) {
        mGeometry[j]->setChipThick(mChipThickness[j]);
      }
      if (mDetectorThickness[j] != 0) {
        mGeometry[j]->setSensorThick(mDetectorThickness[j]);
      }
 
      for (int iw = 0; iw < sNumberOfWrapperVolumes; iw++) {
        if (mLayerRadii[j] > mWrapperMinRadius[iw] && mLayerRadii[j] < mWrapperMaxRadius[iw]) {
          LOG(debug) << "Will embed layer " << j << " in wrapper volume " << iw;
 
          dest = wrapVols[iw];
          mWrapperLayerId[j] = iw;
          break;
        }
      }
      mGeometry[j]->createLayer(dest);
    }
  }
 
  // Now create the services
  TString detName = GetName();
  if (detName == "ITS") {
    ((DescriptorInnerBarrelITS2*)mDescriptorIB.get())->createServices(wrapVols[0]);
  } else if (detName == "IT3") {
#ifdef ENABLE_UPGRADES
    ((DescriptorInnerBarrelITS3*)mDescriptorIB.get())->createServices(wrapVols[0]);
#endif
  }
 
  mServicesGeometry = new V3Services(detName);
  createMiddlBarrelServices(wrapVols[1]);
  createOuterBarrelServices(wrapVols[2]);
  createOuterBarrelSupports(vITSV);
 
  createITSServices(vALIC);
 
  mServicesGeometry->createOBGammaConvWire(vITSV);
 
  // Finally create and place the cage
  V3Cage* cagePtr = new V3Cage(GetName());
  cagePtr->createAndPlaceCage(vALIC); // vALIC = barrel
 
  delete[] wrapVols; // delete pointer only, not the volumes
}
 
void Detector::createMiddlBarrelServices(TGeoVolume* motherVolume)
{
  //
  // Creates the Middle Barrel Service structures
  //
  // Input:
  //         motherVolume : the volume hosting the services
  //
  // Output:
  //
  // Return:
  //
  // Created:      24 Sep 2019  Mario Sitta
  //
 
  // Create the End Wheels on Side A
  mServicesGeometry->createMBEndWheelsSideA(motherVolume);
 
  // Create the End Wheels on Side C
  mServicesGeometry->createMBEndWheelsSideC(motherVolume);
}
 
void Detector::createOuterBarrelServices(TGeoVolume* motherVolume)
{
  //
  // Creates the Outer Barrel Service structures
  //
  // Input:
  //         motherVolume : the volume hosting the services
  //
  // Output:
  //
  // Return:
  //
  // Created:      27 Sep 2019  Mario Sitta
  //
 
  // Create the End Wheels on Side A
  mServicesGeometry->createOBEndWheelsSideA(motherVolume);
 
  // Create the End Wheels on Side C
  mServicesGeometry->createOBEndWheelsSideC(motherVolume);
}
 
void Detector::createOuterBarrelSupports(TGeoVolume* motherVolume)
{
  //
  // Creates the Outer Barrel Service structures
  //
  // Input:
  //         motherVolume : the volume hosting the supports
  //
  // Output:
  //
  // Return:
  //
  // Created:      26 Jan 2020  Mario Sitta
  // Updated:      02 Mar 2020  Mario Sitta
  //
 
  // Create the Cone on Side A
  mServicesGeometry->createOBConeSideA(motherVolume);
 
  // Create the Cone on Side C
  mServicesGeometry->createOBConeSideC(motherVolume);
 
  // Create the CYSS Cylinder
  mServicesGeometry->createOBCYSSCylinder(motherVolume);
}
 
void Detector::createITSServices(TGeoVolume* motherVolume)
{
  //
  // Creates the ITS services: tubes, cables and the like
  //
  // Input:
  //         motherVolume : the volume hosting the supports
  //
  // Output:
  //
  // Return:
  //
  // Created:      12 Apr 2023  Mario Sitta
  //
 
  mServicesGeometry->createAllITSServices(motherVolume);
}
 
void Detector::addAlignableVolumes() const
{
  //
  // Creates entries for alignable volumes associating the symbolic volume
  // name with the corresponding volume path.
  //
  // Created:      06 Mar 2018  Mario Sitta First version (mainly ported from AliRoot)
  //
 
  LOG(info) << "Add ITS alignable volumes";
 
  if (!gGeoManager) {
    LOG(fatal) << "TGeoManager doesn't exist !";
    return;
  }
 
  TString detName = GetName();
  TString path = Form("/cave_1/barrel_1/%s_2", GeometryTGeo::getITSVolPattern());
  TString sname = GeometryTGeo::composeSymNameITS((detName == "IT3"));
 
  LOG(debug) << sname << " <-> " << path;
 
  if (!gGeoManager->SetAlignableEntry(sname.Data(), path.Data())) {
    LOG(fatal) << "Unable to set alignable entry ! " << sname << " : " << path;
  }
 
  Int_t lastUID = 0;
  for (Int_t lr = 0; lr < mNumberLayers; lr++) {
    if (lr < mNumberInnerLayers) {
      if (detName == "ITS") {
        ((DescriptorInnerBarrelITS2*)mDescriptorIB.get())->addAlignableVolumesLayer(lr, mWrapperLayerId[lr], path, lastUID);
      }
    } else {
      addAlignableVolumesLayer(lr, path, lastUID);
    }
  }
 
  return;
}
 
void Detector::addAlignableVolumesLayer(int lr, TString& parent, Int_t& lastUID) const
{
  //
  // Add alignable volumes for a Layer and its daughters
  //
  // Created:      06 Mar 2018  Mario Sitta First version (mainly ported from AliRoot)
  // Updated:      06 Jul 2021  Mario Sitta Do not set Layer as alignable volume
  //
 
  TString wrpV =
    mWrapperLayerId[lr] != -1 ? Form("%s%d_1", GeometryTGeo::getITSWrapVolPattern(), mWrapperLayerId[lr]) : "";
  TString path = Form("%s/%s/%s%d_1", parent.Data(), wrpV.Data(), GeometryTGeo::getITSLayerPattern(), lr);
  TString sname = GeometryTGeo::composeSymNameLayer(lr);
 
  const V3Layer* lrobj = mGeometry[lr];
  Int_t nhbarrel = lrobj->getNumberOfHalfBarrelsPerParent();
  Int_t start = nhbarrel > 0 ? 0 : -1;
  for (Int_t hb = start; hb < nhbarrel; hb++) {
    addAlignableVolumesHalfBarrel(lr, hb, path, lastUID);
  }
 
  return;
}
 
void Detector::addAlignableVolumesHalfBarrel(Int_t lr, Int_t hb, TString& parent, Int_t& lastUID) const
{
  //
  // Add alignable volumes for a Half barrel and its daughters
  //
  // Created:      28 Jun 2021  Mario Sitta First version (based on similar methods)
  //
 
  TString path = parent;
  if (hb >= 0) {
    path = Form("%s/%s%d_%d", parent.Data(), GeometryTGeo::getITSHalfBarrelPattern(), lr, hb);
    TString sname = GeometryTGeo::composeSymNameHalfBarrel(lr, hb);
 
    LOG(debug) << "Add " << sname << " <-> " << path;
 
    if (!gGeoManager->SetAlignableEntry(sname.Data(), path.Data())) {
      LOG(fatal) << "Unable to set alignable entry ! " << sname << " : " << path;
    }
  }
 
  const V3Layer* lrobj = mGeometry[lr];
  Int_t nstaves = lrobj->getNumberOfStavesPerParent();
  for (int st = 0; st < nstaves; st++) {
    addAlignableVolumesStave(lr, hb, st, path, lastUID);
  }
 
  return;
}
 
void Detector::addAlignableVolumesStave(Int_t lr, Int_t hb, Int_t st, TString& parent, Int_t& lastUID) const
{
  //
  // Add alignable volumes for a Stave and its daughters
  //
  // Created:      06 Mar 2018  Mario Sitta First version (mainly ported from AliRoot)
  // Updated:      29 Jun 2021  Mario Sitta Hal Barrel index added
  //
 
  TString path = Form("%s/%s%d_%d", parent.Data(), GeometryTGeo::getITSStavePattern(), lr, st);
  TString sname = GeometryTGeo::composeSymNameStave(lr, hb, st);
 
  LOG(debug) << "Add " << sname << " <-> " << path;
 
  if (!gGeoManager->SetAlignableEntry(sname.Data(), path.Data())) {
    LOG(fatal) << "Unable to set alignable entry ! " << sname << " : " << path;
  }
 
  const V3Layer* lrobj = mGeometry[lr];
  Int_t nhstave = lrobj->getNumberOfHalfStavesPerParent();
  Int_t start = nhstave > 0 ? 0 : -1;
  for (Int_t sst = start; sst < nhstave; sst++) {
    addAlignableVolumesHalfStave(lr, hb, st, sst, path, lastUID);
  }
 
  return;
}
 
void Detector::addAlignableVolumesHalfStave(Int_t lr, Int_t hb, Int_t st, Int_t hst, TString& parent, Int_t& lastUID) const
{
  //
  // Add alignable volumes for a HalfStave (if any) and its daughters
  //
  // Created:      06 Mar 2018  Mario Sitta First version (mainly ported from AliRoot)
  // Updated:      29 Jun 2021  Mario Sitta Hal Barrel index added
  //
 
  TString path = parent;
  if (hst >= 0) {
    path = Form("%s/%s%d_%d", parent.Data(), GeometryTGeo::getITSHalfStavePattern(), lr, hst);
    TString sname = GeometryTGeo::composeSymNameHalfStave(lr, hb, st, hst);
 
    LOG(debug) << "Add " << sname << " <-> " << path;
 
    if (!gGeoManager->SetAlignableEntry(sname.Data(), path.Data())) {
      LOG(fatal) << "Unable to set alignable entry ! " << sname << " : " << path;
    }
  }
 
  const V3Layer* lrobj = mGeometry[lr];
  Int_t nmodules = lrobj->getNumberOfModulesPerParent();
  Int_t start = nmodules > 0 ? 0 : -1;
  for (Int_t md = start; md < nmodules; md++) {
    addAlignableVolumesModule(lr, hb, st, hst, md, path, lastUID);
  }
 
  return;
}
 
void Detector::addAlignableVolumesModule(Int_t lr, Int_t hb, Int_t st, Int_t hst, Int_t md, TString& parent, Int_t& lastUID) const
{
  //
  // Add alignable volumes for a Module (if any) and its daughters
  //
  // Created:      06 Mar 2018  Mario Sitta First version (mainly ported from AliRoot)
  // Updated:      29 Jun 2021  Mario Sitta Hal Barrel index added
  //
 
  TString path = parent;
  if (md >= 0) {
    path = Form("%s/%s%d_%d", parent.Data(), GeometryTGeo::getITSModulePattern(), lr, md);
    TString sname = GeometryTGeo::composeSymNameModule(lr, hb, st, hst, md);
 
    LOG(debug) << "Add " << sname << " <-> " << path;
 
    if (!gGeoManager->SetAlignableEntry(sname.Data(), path.Data())) {
      LOG(fatal) << "Unable to set alignable entry ! " << sname << " : " << path;
    }
  }
 
  const V3Layer* lrobj = mGeometry[lr];
  Int_t nchips = lrobj->getNumberOfChipsPerParent();
  for (Int_t ic = 0; ic < nchips; ic++) {
    addAlignableVolumesChip(lr, hb, st, hst, md, ic, path, lastUID);
  }
 
  return;
}
 
void Detector::addAlignableVolumesChip(Int_t lr, Int_t hb, Int_t st, Int_t hst, Int_t md, Int_t ch, TString& parent,
                                       Int_t& lastUID) const
{
  //
  // Add alignable volumes for a Chip
  //
  // Created:      06 Mar 2018  Mario Sitta First version (mainly ported from AliRoot)
  // Updated:      29 Jun 2021  Mario Sitta Hal Barrel index added
  //
 
  TString path = Form("%s/%s%d_%d", parent.Data(), GeometryTGeo::getITSChipPattern(), lr, ch);
  TString sname = GeometryTGeo::composeSymNameChip(lr, hb, st, hst, md, ch);
  Int_t modUID = chipVolUID(lastUID++);
 
  LOG(debug) << "Add " << sname << " <-> " << path;
 
  if (gGeoManager->SetAlignableEntry(sname, path.Data(), modUID) == nullptr) {
    LOG(fatal) << "Unable to set alignable entry ! " << sname << " : " << path;
  }
}
 
void Detector::defineSensitiveVolumes()
{
  TGeoManager* geoManager = gGeoManager;
  TGeoVolume* v = nullptr;
 
  TString volumeName;
 
  // The names of the ITS sensitive volumes have the format: ITSUSensor(0...mNumberLayers-1)
  for (Int_t j = 0; j < mNumberLayers; j++) {
    TString detName = GetName();
    if (j < mNumberInnerLayers && detName == "IT3") {
      volumeName = GeometryTGeo::getITS3SensorPattern() + TString::Itoa(j, 10);
    } else {
      volumeName = GeometryTGeo::getITSSensorPattern() + TString::Itoa(j, 10);
    }
    v = geoManager->GetVolume(volumeName.Data());
    AddSensitiveVolume(v);
  }
}
 
void Detector::fillParallelWorld() const
{
  TGeoParallelWorld* pw = gGeoManager->GetParallelWorld();
  if (pw == nullptr) {
    LOG(error) << "Parallel world was not created";
    return;
  }
  auto& param = ITSSimParam::Instance();
 
  for (int iL{0}; iL < mNumberLayers; ++iL) {
    auto const layer = mGeometry[iL];
    int nhbarrels = layer->getNumberOfHalfBarrelsPerParent();
    int nstaves = layer->getNumberOfStavesPerParent();
    int nhstaves = layer->getNumberOfHalfStavesPerParent();
    int nmodules = layer->getNumberOfModulesPerParent();
    int nchips = layer->getNumberOfChipsPerParent();
 
    for (int iHB{0}; iHB < nhbarrels; ++iHB) {
      for (int iS{0}; iS < nstaves; ++iS) {
        for (int iHS{nhstaves > 0 ? 0 : -1}; iHS < nhstaves; ++iHS) {
          for (int iM{nmodules > 0 ? 0 : -1}; iM < nmodules; ++iM) {
            for (int iC{0}; iC < nchips; ++iC) {
              TString sname = GeometryTGeo::composeSymNameChip(iL, iHB, iS, iHS, iM, iC);
              TGeoPNEntry* pne = gGeoManager->GetAlignableEntry(sname);
              auto path = pne->GetTitle();
 
              if (param.addMetalToPW) {
                TString metalPath = Form("%s/MetalStack_1", path);
                gGeoManager->MakePhysicalNode(metalPath);
                pw->AddNode(metalPath);
              }
              if (param.addSensorToPW) {
                TString sensorPath = Form("%s/ITSUSensor%d_1", path, iL);
                gGeoManager->MakePhysicalNode(sensorPath);
                pw->AddNode(sensorPath);
              }
              if (param.addChipToPW) {
                pw->AddNode(path);
              }
            }
          }
        }
      }
    }
  }
}
 
Hit* Detector::addHit(int trackID, int detID, const TVector3& startPos, const TVector3& endPos,
                      const TVector3& startMom, double startE, double endTime, double eLoss, unsigned char startStatus,
                      unsigned char endStatus)
{
  mHits->emplace_back(trackID, detID, startPos, endPos, startMom, startE, endTime, eLoss, startStatus, endStatus);
  return &(mHits->back());
}
 
ClassImp(o2::its::Detector);
 
// Define Factory method for calling from the outside
extern "C" {
o2::base::Detector* create_detector_its(const char* name, bool active)
{
  return o2::its::Detector::create(name, active);
}
}