TGCHitsTestTool.cxx

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/*
  Copyright (C) 2002-2023 CERN for the benefit of the ATLAS collaboration
*/
 
#include "TGCHitsTestTool.h"
 
#include "GeoAdaptors/GeoMuonHits.h"
 
#include "MuonReadoutGeometry/MuonDetectorManager.h"
#include "MuonReadoutGeometry/TgcReadoutElement.h"
 
#include "MuonSimEvent/TGCSimHitCollection.h"
#include "MuonSimEvent/TGCSimHit.h"
 
#include "MuonSimEvent/TgcHitIdHelper.h"
#include "MuonIdHelpers/TgcIdHelper.h"
 
#include "GeneratorObjects/McEventCollection.h"
#include "CLHEP/Vector/LorentzVector.h"
 
#include <TH2D.h>
 
Identifier TGCHitsTestTool::getIdentifier(HitID tgchit) {
  const TgcHitIdHelper* tgchelper = TgcHitIdHelper::GetHelper();
  std::string tgc_stname = tgchelper->GetStationName(tgchit);
  int         tgc_steta  = tgchelper->GetStationEta(tgchit);
  int         tgc_stphi  = tgchelper->GetStationPhi(tgchit);
  int         tgc_gg     = tgchelper->GetGasGap(tgchit);
  int         tgc_strip  = 1;//tgchelper->GetIsStrip(tgchit);
  int         tgc_channel = 1;//tgchelper->GetChannel(tgchit);
 
  Identifier offid = m_pTgcIdHelper->channelID(tgc_stname, tgc_steta, tgc_stphi, tgc_gg, tgc_strip, tgc_channel);
  if (offid == 0) {
    ATH_MSG_FATAL("TGC: Cannot build a valid Identifier; skip ");
  }
  ATH_MSG_VERBOSE(" TGC: Offline Id "<<m_pTgcIdHelper->show_to_string(offid));
 
  return offid;
}
 
StatusCode TGCHitsTestTool::checkIdentifier(Identifier offid) {
  const MuonGM::TgcReadoutElement* descriptor = m_pMuonMgr->getTgcReadoutElement(offid);
  if (!descriptor) {
    ATH_MSG_FATAL("TGC readout element not found for Id = " << m_pTgcIdHelper->show_to_string(offid));
    return StatusCode::FAILURE;
  }
 
  // -------- Testing Sim to Offline ID conversion ---------
  Amg::Vector3D tgc_gPos = descriptor->channelPos(offid);
  double tgc_strip_phi = tgc_gPos.phi();
  if (tgc_strip_phi < 0.) tgc_strip_phi += 2.*M_PI;
  /*
    double tgc_strip_perp  = tgc_gPos.perp();
    double tgc_strip_z   = tgc_gPos.z();
    double tgc_strip_cot   = 1./tan(tgc_gPos.theta());
  */
 
  return StatusCode::SUCCESS;
}
 
 
StatusCode TGCHitsTestTool::processEvent() {
  CHECK(executeCheckEventInfo());
 
  //MuonSpectrometer
  // TGC
  // Get the TGC histograms
  // Short description:
  //   MuonSpectrometer TGC cross section
  //   MuonSpectrometer TGC longitudinal
  //   Eta, Theta, Phi, z residual (...), phi residual (...) of hits in TGCs
 
  // Enter the main algorithm loop
  if (m_DoTGCTest) {
 
    const TGCSimHitCollection* p_collection = nullptr;
    if (evtStore()->retrieve(p_collection,"TGC_Hits") == StatusCode::SUCCESS) {
      for (const TGCSimHit& hit : *p_collection) {
        HitID tgchit= hit.TGCid();
        Identifier offid= getIdentifier(tgchit);
        CHECK(checkIdentifier(offid));
 
         //Check Hits
        GeoTGCHit ghit(hit);
        if (!ghit) continue;
        Amg::Vector3D u = ghit.getGlobalPosition();
        CHECK(executeFillHistos(u));
      }
    }
  }
 
  return StatusCode::SUCCESS;
}
 
StatusCode TGCHitsTestTool::initialize() {
  CHECK(MuonHitTestToolBase::initialize());
  m_pTgcIdHelper = m_pMuonMgr->tgcIdHelper();
  return StatusCode::SUCCESS;
}