FPGATrackSimGenScanMonitoring.cxx

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// Copyright (C) 2002-2025 CERN for the benefit of the ATLAS collaboration
 
#include "FPGATrackSimGenScanMonitoring.h"
#include "AthenaBaseComps/AthMsgStreamMacros.h"
#include "FPGATrackSimBinning/FPGATrackSimBinUtil.h"
#include "FPGATrackSimBinning/FPGATrackSimBinnedHits.h"
#include "TH1D.h"
#include "TH2D.h"
#include "TTree.h"
#include <bit>
 
#include "src/FPGATrackSimGenScanTool.h"
 
FPGATrackSimGenScanMonitoring::FPGATrackSimGenScanMonitoring(const std::string& algname, const std::string &name, const IInterface *ifc) :
  AthAlgTool(algname, name, ifc)
{
}
 
StatusCode FPGATrackSimGenScanMonitoring::initialize()
{
  // Dump the configuration to make sure it propagated through right  
  auto props = this->getProperties();
  for( Gaudi::Details::PropertyBase* prop : props ) {
    if (prop->ownerTypeName()==this->type()) {      
      ATH_MSG_DEBUG("Property:\t" << prop->name() << "\t : \t" << prop->toString());
    }
  }
 
  ATH_CHECK(m_tHistSvc.retrieve());
 
  ATH_CHECK(bookTree());
 
  return StatusCode::SUCCESS;
 
}
 
StatusCode FPGATrackSimGenScanMonitoring::registerHistograms(const FPGATrackSimBinnedHits* binnedhits)
{
  m_binnedhits = binnedhits;
  const FPGATrackSimBinTool &bintool = m_binnedhits->getBinTool();
  const IFPGATrackSimBinDesc* bindesc = bintool.binDesc();
  int nLyrs = m_binnedhits->getNLayers();
 
  // This is because if you change the binning class you can change what axis
  // ranges you need for the plotting
  ATH_MSG_INFO("Hist scales phi: " << m_phiScale << "  eta: " << m_etaScale << "  dr:" << m_drScale);
  
  allocateDataFlowCounters();
 
  // Truth Parameter distributions, bounds should cover 3x nominal range
  for (unsigned i = 0; i < FPGATrackSimTrackPars::NPARS; i++) {
    ATH_CHECK(makeAndRegHist(
        m_truthpars_hists[i], ("truth" + bindesc->parNames(i)).c_str(),
        (";" + m_binnedhits->getBinTool().binDesc()->parNames(i) + ";").c_str(), 200,
        -2 * m_binnedhits->getBinTool().parRange(i),
        2 * m_binnedhits->getBinTool().parRange(i)));
  }
 
  // All Hit level histograms
  ATH_CHECK(makeAndRegHistVector(m_rZ_allhits, nLyrs+1, NULL , 
            "RZ_allhits", "; Z [mm] ; R [mm] ", 500, -2000, 2000, 500, 0, 500));
  
  ATH_CHECK(makeAndRegHistVector(m_phiResidual, nLyrs+1, NULL , 
            "phiResidual", "phi residual [mm]", 1000, -10, 10));
  ATH_CHECK(makeAndRegHistVector(m_etaResidual,nLyrs+1, NULL ,  
            "etaResidual", "eta residual [mm]", 1000, -10, 10));
 
  ATH_CHECK(makeAndRegHistVector(m_phiTrueBinShift, nLyrs+1, NULL , 
            "phiTrueBinShift", "phi TrueBinShift [mm]", 1000, -10, 10));
  ATH_CHECK(makeAndRegHistVector(m_etaTrueBinShift,nLyrs+1, NULL ,  
            "etaTrueBinShift", "eta TrueBinShift [mm]", 1000, -10, 10));
 
  // Data flow hists
  ATH_CHECK(
      makeAndRegHist(m_inputHits, "InputHits", ";Input Hits", 200, 0, 100000));
  ATH_CHECK(makeAndRegHistVector(m_hitsPerStepBin, bintool.steps().size(),
                                 &bintool.stepNames(), "hitsPerStepBin_",
                                 "; Hits per bin in step", 1000, 0, 1000));
  ATH_CHECK(makeAndRegHist(m_pairs, "pairs", ";pairs;", 100, 0, 500));
  ATH_CHECK(makeAndRegHist(m_pairinghits, "pairinghits", ";Pairing Hits;", 50,
                           0, 50));
  ATH_CHECK(makeAndRegHist(m_filteredpairs, "filteredpairs", "filteredpairs",
                           100, 0, 500));
  ATH_CHECK(makeAndRegHist(m_pairsets, "pairsets", ";pairsets;", 100, 0, 100));
  ATH_CHECK(makeAndRegHist(m_numLyrsPerBin, "numLyrsPerBin",
                           ";#Hit Layers per Bin", nLyrs + 1, 0, nLyrs + 1));
  ATH_CHECK(makeAndRegHist(m_hitsPerLayer, "hitsPerLayer", "; Layer ; Hits ",
                           nLyrs, 0, nLyrs));
  ATH_CHECK(makeAndRegHist(m_hitsPerLayer2D, "hitsPerLayer2D",
                           "; Layer ; Hits ", nLyrs, 0, nLyrs, 20, 0,
                           m_isSingleParticle ? 20 : 10000));
  
 
  // Road statistics
  ATH_CHECK(makeAndRegHist(m_roadFilterFlow , "roadFilterFlow" , "road filter flow", 10, 0, 10));
  ATH_CHECK(makeAndRegHist(m_phiShift_road, "phiShift_road", ";Phi Shift", 2000, -1.0*m_phiScale, m_phiScale));
  ATH_CHECK(makeAndRegHist(m_etaShift_road, "etaShift_road", ";Eta Shift", 2000, -1.0*m_etaScale, m_etaScale));
  ATH_CHECK(makeAndRegHist(m_phiShift2D_road, "phiShift2D_road", ";Phi Shift; R", 
                          400, -1.0*m_phiScale, m_phiScale, 100, 0, 400));
  ATH_CHECK(makeAndRegHist(m_etaShift2D_road, "etaShift2D_road", ";Phi Shift; R", 
                          400, -1.0*m_etaScale, m_etaScale, 100, 0, 400));
 
  ATH_CHECK(makeAndRegHist(m_hitsPerLayer_bin, "HitsPerLayer_bin",
                           "; Layer; Hits in Bin Passing Threshold",
                           nLyrs, 0, nLyrs, 20, 0, 20));
 
 
  // Pair Filter Cuts
  ATH_CHECK(makeAndRegHist(m_phiOutExtrap, "PhiOutExtrap", ";Phi Out Extrap", 2000, -1.0*m_phiScale, m_phiScale));
  ATH_CHECK(makeAndRegHist(m_phiInExtrap, "PhiInExtrap", ";Phi In Extrap", 2000, -1.0*m_phiScale, m_phiScale));
  ATH_CHECK(makeAndRegHist(m_phiOutExtrapCurveLimit, "PhiOutExtrapCurveLimit", 
    ";Phi Out Extrap w/ Curve Limit", 2000, -1.0*m_phiScale, m_phiScale));
  ATH_CHECK(makeAndRegHist(m_phiInExtrapCurveLimit, "PhiInExtrapCurveLimit", 
    ";Phi In Extrap w/ Curve Limit", 2000, -1.0*m_phiScale, m_phiScale));
  ATH_CHECK(makeAndRegHist(m_etaOutExtrap, "EtaOutExtrap", ";Eta Out Extrap", 2000, -1.0*m_etaScale, m_etaScale));
  ATH_CHECK(makeAndRegHist(m_etaInExtrap, "EtaInExtrap", ";Eta In Extrap", 2000, -1.0* m_etaScale, m_etaScale));
  ATH_CHECK(makeAndRegHist(m_deltaPhi, "DeltaPhi", ";Delta Phi [rad]", 2000, -1.0*m_phiScale, m_phiScale));
  ATH_CHECK(makeAndRegHist(m_deltaEta, "DeltaEta", ";Delta Eta [rad]", 2000, -1.0*m_etaScale, m_etaScale));
  ATH_CHECK(makeAndRegHist(m_deltaPhiDR, "DeltaPhiDR", ";Delta Phi / Delta R", 2000, -0.1 * m_phiScale, 0.1 * m_phiScale));
  ATH_CHECK(makeAndRegHist(m_deltaEtaDR, "DeltaEtaDR", ";Delta Eta / Delta R", 2000, -0.1 * m_phiScale, 0.1 * m_phiScale));
  ATH_CHECK(makeAndRegHistVector(m_deltaPhiByLyr, nLyrs, NULL, "DeltaPhiDR", ";Delta Phi / Delta R", 2000, -0.1 * m_phiScale, 0.1 * m_phiScale));
  ATH_CHECK(makeAndRegHistVector(m_deltaEtaByLyr, nLyrs, NULL,  "DeltaEtaDR", ";Delta Eta / Delta R", 2000, -0.1 * m_phiScale, 0.1 * m_phiScale));
 
  // Pair Match Cuts
  ATH_CHECK(makeAndRegHistVector(
      m_pairSetMatchPhi, m_twoPairClasses.size(), &m_twoPairClasses,
      "PairSetMatchPhi", ";PairSet Match Phi [mm]", 500,
      -1.0*m_phiScale / m_drScale, m_phiScale / m_drScale));
  ATH_CHECK(makeAndRegHistVector(
      m_pairSetMatchEta, m_twoPairClasses.size(), &m_twoPairClasses,
      "PairSetMatchEta", ";PairSet Match Eta [mm]", 500,
      -1.0*m_etaScale / m_drScale, m_etaScale / m_drScale));
  ATH_CHECK(makeAndRegHistVector(
      m_deltaDeltaPhi, m_twoPairClasses.size(), &m_twoPairClasses,
      "DeltaDeltaPhi", ";DeltaDelta   Phi [mm]", 500, -1.0*m_phiScale / m_drScale,
      m_phiScale / m_drScale));
  ATH_CHECK(makeAndRegHistVector(
      m_deltaDeltaEta, m_twoPairClasses.size(), &m_twoPairClasses,
      "DeltaDeltaEta", ";DeltaDelta   Eta [mm]", 500, -1.0 * m_etaScale / m_drScale,
      1.0 * m_etaScale / m_drScale));
  ATH_CHECK(makeAndRegHistVector(m_phiCurvature, m_twoPairClasses.size(),
                               &m_twoPairClasses, "PhiCurvature",
                               ";Phi Curvature ", 5000,
                               -1.0 * m_phiScale / m_drScale / m_drScale,
                               1.0 * m_phiScale / m_drScale / m_drScale));
  ATH_CHECK(makeAndRegHistVector(m_etaCurvature, m_twoPairClasses.size(),
                               &m_twoPairClasses, "EtaCurvature",
                               ";Eta Curvature ", 5000,
                               -1.0 * m_etaScale / m_drScale / m_drScale,
                               1.0 * m_etaScale / m_drScale / m_drScale));
  ATH_CHECK(makeAndRegHistVector(m_deltaPhiCurvature, m_twoPairClasses.size(),
                               &m_twoPairClasses, "DeltaPhiCurvature",
                               ";Delta Phi Curvature ", 5000,
                               -1.0 * m_phiScale / m_drScale / m_drScale,
                               1.0 * m_phiScale / m_drScale / m_drScale));
  ATH_CHECK(makeAndRegHistVector(m_deltaEtaCurvature, m_twoPairClasses.size(),
                               &m_twoPairClasses, "DeltaEtaCurvature",
                               ";Delta Eta Curvature ", 500,
                               -0.1 * m_etaScale / m_drScale / m_drScale,
                               0.1 * m_etaScale / m_drScale / m_drScale));
  ATH_CHECK(makeAndRegHistVector(m_phiOutExtrapCurved, m_twoPairClasses.size(),
                               &m_twoPairClasses, "PhiOutExtrapCurved",
                               ";Phi Out Extrap Curved", 2000, -1.0*m_phiScale,
                               m_phiScale));
  ATH_CHECK(makeAndRegHistVector(m_phiInExtrapCurved, m_twoPairClasses.size(),
                               &m_twoPairClasses, "PhiInExtrapCurved",
                               ";Phi In Extrap Curved ", 2000, -1.0*m_phiScale,
                               m_phiScale));
  ATH_CHECK(makeAndRegHist(m_pairMatchPhi2D, "PairSetMatchPhi2D",
                         ";PairSet Match Phi vs dRin [mm]", 100, 0, 100, 500,
                         -100.0 * m_phiScale, 100.0 * m_phiScale));
  ATH_CHECK(makeAndRegHist(m_pairMatchEta2D, "PairSetMatchEta2D",
                         ";PairSet Match Eta vs dRin [mm]", 100, 0, 100, 500,
                         -100.0 * m_etaScale, 100.0 * m_etaScale));
 
  ATH_CHECK(makeAndRegHist(m_unpairedHits, "UnpairedHits", "; Stage ; Unpaired Hits" , nLyrs+1, 0, nLyrs+1, 20, 0, 20));
  ATH_CHECK(makeAndRegHist(m_pairsetsIncr, "PairSetsIncr", "; Stage ; Pairsets" , nLyrs+1, 0, nLyrs+1, 20, 0, 20));
  ATH_CHECK(makeAndRegHist(m_pairsetsHits, "PairSetsHits", "; Stage ; Hits in Pairsets" , nLyrs+1, 0, nLyrs+1, 20, 0, 20));
  ATH_CHECK(makeAndRegHist(m_totalInputIncr, "TotalInputIncr", "; Stage ; Pairsets+Unpaired" , nLyrs+1, 0, nLyrs+1, 20, 0, 20));
  ATH_CHECK(makeAndRegHist(m_binStagesIncr, "BinStagesIncr", "; Stage ; Bins at this point" , nLyrs+1, 0, nLyrs+1, 20, 0, 20));
 
  return StatusCode::SUCCESS;
}
 
 
StatusCode FPGATrackSimGenScanMonitoring::bookTree() {
  ATH_MSG_DEBUG("Booking Layers Study  Tree");
  m_bin_module_tree = new TTree("LayerStudy","LayerStudy");
  m_bin_module_tree->Branch("bin", &m_tree_bin);
  m_bin_module_tree->Branch("r", &m_tree_r);
  m_bin_module_tree->Branch("z", &m_tree_z);
  m_bin_module_tree->Branch("id", &m_tree_id);
  m_bin_module_tree->Branch("hash", &m_tree_hash);
  m_bin_module_tree->Branch("layer", &m_tree_layer);
  m_bin_module_tree->Branch("side", &m_tree_side);
  m_bin_module_tree->Branch("etamod",  &m_tree_etamod);
  m_bin_module_tree->Branch("phimod",  &m_tree_phimod);
  m_bin_module_tree->Branch("dettype", &m_tree_dettype);
  m_bin_module_tree->Branch("detzone",  &m_tree_detzone);
 
  ATH_CHECK(m_tHistSvc->regTree(m_dir + m_bin_module_tree->GetName(), m_bin_module_tree));
  return StatusCode::SUCCESS;
}
void FPGATrackSimGenScanMonitoring::ClearTreeVectors()
{
  m_tree_r.clear();
  m_tree_z.clear();
  m_tree_id.clear();
  m_tree_hash.clear();
  m_tree_layer.clear();
  m_tree_side.clear();
  m_tree_etamod.clear();
  m_tree_phimod.clear();
  m_tree_dettype.clear();
  m_tree_detzone.clear();
}
 
 
void FPGATrackSimGenScanMonitoring::allocateDataFlowCounters() {
  m_hitsCntByLayer.resize(m_binnedhits->getNLayers(),0);  
}
 
void FPGATrackSimGenScanMonitoring::resetDataFlowCounters() {
  for (auto& bin: m_hitsCntByLayer) { bin =0;}
}
 
 
// This is done at the end of event execution to store any graphs that were created
StatusCode FPGATrackSimGenScanMonitoring::registerGraphs() 
{
  // Make a vector of pointers to all the eventDispSet instances...
  std::vector<FPGATrackSimGenScanMonitoring::eventDispSet *> allsets(
      {&m_allHitsGraph, &m_roadGraph, &m_lostPairFilterGraph,
       &m_passPairFilterGraph, &m_lostPairSetFilterGraph,
       &m_passPairSetFilterGraph});
 
  // Then loop to register them all
  for (auto& set : allsets) {
    ATH_CHECK(set->registerGraphs(this));
  }
 
  return StatusCode::SUCCESS;
}
 
 
void FPGATrackSimGenScanMonitoring::fillBinLevelOutput(const FPGATrackSimBinUtil::IdxSet &idx,
                                  const FPGATrackSimBinnedHits::BinEntry &data)
{
  setBinPlotsActive(idx);
 
  m_roadGraph.addEvent(data.hits);
 
  if (m_binPlotsActive) {
    for (auto& hit : data.hits) {
      m_phiShift_road->Fill(hit.phiShift);
      m_etaShift_road->Fill(hit.etaShift);
      m_phiShift2D_road->Fill(hit.phiShift, hit.hitptr->getR());
      m_etaShift2D_road->Fill(hit.etaShift, hit.hitptr->getR());
    }
 
    // Module mapping and Layer definition studies
    // first sort hits by r+z radii
    std::vector<FPGATrackSimBinUtil::StoredHit> sorted_hits = data.hits;
    std::sort(sorted_hits.begin(), sorted_hits.end(),
              [](const auto &hit1, const auto &hit2) {
                return hit1.rzrad() < hit2.rzrad();
              });
 
    // Fill tree
    m_tree_bin = std::vector<unsigned>(idx);
    ClearTreeVectors();
    for (auto &hit : sorted_hits) {
      m_tree_r.push_back(hit.hitptr->getR());
      m_tree_z.push_back(hit.hitptr->getZ());
      m_tree_id.push_back(hit.hitptr->getIdentifier());
      m_tree_hash.push_back(hit.hitptr->getIdentifierHash());
      m_tree_layer.push_back(hit.hitptr->getLayerDisk());
      m_tree_side.push_back(hit.hitptr->getSide());
      m_tree_etamod.push_back(hit.hitptr->getEtaModule());
      m_tree_phimod.push_back(hit.hitptr->getPhiModule());
      m_tree_dettype.push_back((int)hit.hitptr->getDetType());
      m_tree_detzone.push_back((int)hit.hitptr->getDetectorZone());
    }
    ATH_MSG_DEBUG("For tree, bin=" << idx << " mods=" << m_tree_hash);
    m_bin_module_tree->Fill();
  }
}
 
void FPGATrackSimGenScanMonitoring::fillHitsByLayer(                           
      const std::vector<std::vector<const FPGATrackSimBinUtil::StoredHit *> > & hitsByLayer)
{
  for (unsigned lyr = 0; lyr < m_binnedhits->getNLayers(); lyr++)
  {
    m_hitsPerLayer_bin->Fill(lyr, hitsByLayer[lyr].size());
  }
}
 
void FPGATrackSimGenScanMonitoring::fillHitLevelInput(
    const FPGATrackSimHit *hit) {
  const IFPGATrackSimBinDesc* bindesc = m_binnedhits->getBinTool().binDesc();
  m_rZ_allhits[m_binnedhits->getNLayers()]->Fill(hit->getZ(), hit->getR());       // all layer plot
  m_rZ_allhits[hit->getLayer()]->Fill(hit->getZ(), hit->getR()); // layer specific plot
  if (m_truthIsValid)
    {
      m_etaResidual[m_binnedhits->getNLayers()]->Fill(bindesc->etaResidual(m_truthparset, hit));
      m_etaResidual[hit->getLayer()]->Fill(bindesc->etaResidual(m_truthparset, hit));
      m_phiResidual[m_binnedhits->getNLayers()]->Fill(bindesc->phiResidual(m_truthparset, hit));
      m_phiResidual[hit->getLayer()]->Fill(bindesc->phiResidual(m_truthparset, hit));
 
      if (m_truthbin.back() != FPGATrackSimBinUtil::invalidBin) {
        FPGATrackSimBinUtil::ParSet binCenter = m_binnedhits->getBinTool().lastStep()->binCenter(m_truthbin.back());
        m_etaTrueBinShift[m_binnedhits->getNLayers()]->Fill(bindesc->etaResidual(binCenter, hit));
        m_etaTrueBinShift[hit->getLayer()]->Fill(bindesc->etaResidual(binCenter, hit));
        m_phiTrueBinShift[m_binnedhits->getNLayers()]->Fill(bindesc->phiResidual(binCenter, hit));
        m_phiTrueBinShift[hit->getLayer()]->Fill(bindesc->phiResidual(binCenter, hit));
      }
  }
}
 
 
void FPGATrackSimGenScanMonitoring::pairFilterCheck(
    const FPGATrackSimGenScanTool::HitPairSet &pairs,
    const FPGATrackSimGenScanTool::HitPairSet &filteredpairs, 
    bool passedPairFilter) {
 
  m_roadFilterFlow->Fill(0);
  m_pairs->Fill(pairs.pairList.size());
  m_filteredpairs->Fill(filteredpairs.pairList.size());
 
  if (passedPairFilter) {
    // if passed mark progress in flow histogram and make passed Histogram
    m_roadFilterFlow->Fill(1);
    m_passPairFilterGraph.addEvent(filteredpairs.hitlist);
  } else {
    // If the true bin didn't pass print some debug and make a lost event
    // display
    if (m_binPlotsActive) {
      ATH_MSG_INFO("lost at pair filter : hit layers = "
                   << filteredpairs.lyrCnt() << " "
                   << std::bitset<16>(filteredpairs.hitLayers));
      m_lostPairFilterGraph.addEvent(pairs.hitlist);
    }
  }
}
 
void FPGATrackSimGenScanMonitoring::fillBinningSummary(
    const std::vector<std::shared_ptr<const FPGATrackSimHit>> &hits)
{
  m_inputHits->Fill(hits.size());
  m_allHitsGraph.addEvent(hits);
 
  for (auto &step : m_binnedhits->getBinTool().steps()) {
    for (auto bin : m_binnedhits->binnedHits()[step->stepNum()])
      m_hitsPerStepBin[step->stepNum()]->Fill(bin.data().hitCnt);
  }
 
  for (auto bin :m_binnedhits->binnedHits()[m_binnedhits->getBinTool().lastStep()->stepNum()]) {
    for (unsigned lyr = 0; lyr < m_binnedhits->getNLayers(); lyr++) {
      unsigned cnt = bin.data().hitsInLyr(lyr);
      m_hitsPerLayer->Fill(lyr, cnt);
      m_hitsPerLayer2D->Fill(lyr, cnt);
    }
  }
}
 
 
void FPGATrackSimGenScanMonitoring::parseTruthInfo(
  std::vector<FPGATrackSimTruthTrack> const * truthtracks, bool isSingleParticle)
{
  ATH_MSG_DEBUG("In parseTruthInfo ptr = " << truthtracks 
                << " size = " << (truthtracks ? truthtracks->size() : 0));
  m_isSingleParticle = isSingleParticle;
  m_truthtracks = truthtracks;
  m_truthIsValid = false;
 
  const IFPGATrackSimBinDesc* bindesc = m_binnedhits->getBinTool().binDesc();
 
  if (!m_truthtracks) return;
  if (m_truthtracks->size() == 0) return;
 
  // Convert to binning parameters and find truth bin for each step
  m_truthpars = (*m_truthtracks)[0].getPars();
  m_truthpars[FPGATrackSimTrackPars::IHIP] =
      m_truthpars[FPGATrackSimTrackPars::IHIP] * 1000;
  m_truthparset = bindesc->trackParsToParSet(m_truthpars);
  m_truthbin.clear();
  for (auto &step : m_binnedhits->getBinTool().steps()) {
    m_truthbin.push_back(step->binIdx(m_truthparset));
  }
 
  // histogram parameters
  for (unsigned i = 0; i < FPGATrackSimTrackPars::NPARS; i++) {
    m_truthpars_hists[i]->Fill(m_truthparset[i]);
  }
 
  // a closure test
  FPGATrackSimTrackPars recovered = bindesc->parSetToTrackPars(m_truthparset);
  ATH_MSG_DEBUG("parset:" << m_truthparset << " " << m_truthpars
                          << " ?= " << recovered << " closure:"
                          << " " << recovered[FPGATrackSimTrackPars::IHIP] - m_truthpars[FPGATrackSimTrackPars::IHIP]
                          << " " << recovered[FPGATrackSimTrackPars::IPHI] - m_truthpars[FPGATrackSimTrackPars::IPHI]
                          << " " << recovered[FPGATrackSimTrackPars::ID0] - m_truthpars[FPGATrackSimTrackPars::ID0]
                          << " " << recovered[FPGATrackSimTrackPars::IETA] - m_truthpars[FPGATrackSimTrackPars::IETA]
                          << " " << recovered[FPGATrackSimTrackPars::IZ0] - m_truthpars[FPGATrackSimTrackPars::IZ0]);
 
  // print if there are multiple tracks for debugging single track MC
  if (m_truthtracks->size() > 1) {
    for (unsigned i = 0; i < m_truthtracks->size(); i++) {
      ATH_MSG_INFO("Multiple truth" << i << " of " << m_truthtracks->size()
                                    << " " << (*m_truthtracks)[i].getPars());
    }
  }
 
  // find truth bin for later plotting selections
  ATH_MSG_DEBUG("truthbin " << m_truthtracks << " " << m_truthtracks->size()
                            << " " << m_truthpars << " " << m_truthbin);
 
  // Check if the truth track falls in the binning range
  if (!m_binnedhits->getBinTool().inRange(m_truthparset)) {
    ATH_MSG_INFO("Truth out of range");
    return;
  }
 
  // Check that truth track falls in an actual bin
  // this should alway pass, except for weird events
  m_truthIsValid = true;
  for (auto &step : m_binnedhits->getBinTool().steps()) {
    if (!step->validBinsFull()[m_truthbin[step->stepNum()]]) {
      ATH_MSG_INFO("Truth Bin not valid! Step " << step->stepName() << " "
                                                << m_truthbin[step->stepNum()]
                                                << " : " << m_truthpars);
      std::vector<FPGATrackSimBinUtil::IdxSet> idxsets =
          FPGATrackSimBinUtil::makeVariationSet(
              std::vector<unsigned>({0, 1, 2, 3, 4}),
              m_truthbin[step->stepNum()]);
      for (FPGATrackSimBinUtil::IdxSet &idxset : idxsets) {
        ATH_MSG_INFO("Truth Box "
                     << bindesc->parSetToTrackPars(step->binLowEdge(idxset)));
      }
      m_truthIsValid = false;
    }
  }
}
 
void FPGATrackSimGenScanMonitoring::fillPairingHits(
    std::vector<const FPGATrackSimBinUtil::StoredHit *> const *lastlyr,
    std::vector<const FPGATrackSimBinUtil::StoredHit *> const *lastlastlyr) {
 
  auto size_if_nonzero_ptr =
      [](std::vector<const FPGATrackSimBinUtil::StoredHit *> const *ptr) {
        if (ptr) {
          return int(ptr->size());
        } else {
          return 0;
        }
      };
 
  m_pairinghits->Fill(size_if_nonzero_ptr(lastlyr) +
                      size_if_nonzero_ptr(lastlastlyr));
}
 
void FPGATrackSimGenScanMonitoring::fillPairFilterCuts(
    const FPGATrackSimGenScanTool::HitPair &pair, double r_in, double r_out) {
  // m_pairs->Fill(pairs.pairList.size());
  if (m_binPlotsActive) {
    int lyr = pair.first->hitptr->getLayer();
    m_deltaPhi->Fill(pair.dPhi());
    m_deltaEta->Fill(pair.dEta());
    m_deltaPhiDR->Fill(pair.dPhi() / pair.dR());
    m_deltaEtaDR->Fill(pair.dEta() / pair.dR());
    m_deltaPhiByLyr[lyr]->Fill(pair.dPhi());
    m_deltaEtaByLyr[lyr]->Fill(pair.dEta());
    m_phiInExtrap->Fill(pair.PhiInExtrap(r_in));
    m_phiOutExtrap->Fill(pair.PhiOutExtrap(r_out));
    m_etaInExtrap->Fill(pair.EtaInExtrap(r_in));
    m_etaOutExtrap->Fill(pair.EtaOutExtrap(r_out));
  }
}
 
// This classifies a pair of pairs into a category for plotting
// e.g. are they bewtween hits in the same layer, are there three layers,
// if there are three layers are they sequential,...
// This is to try to understand some of the structure of the
// pair matching distributions
unsigned FPGATrackSimGenScanMonitoring::pairpairCategory(
    const FPGATrackSimGenScanTool::HitPair &pair,
    const FPGATrackSimGenScanTool::HitPair &lastpair) const {
  unsigned minlyr = std::min(lastpair.first->layer, lastpair.second->layer);
  minlyr = std::min(minlyr, pair.first->layer);
  minlyr = std::min(minlyr, pair.second->layer);
 
  unsigned hitbits =
      ((1 << lastpair.first->layer) | (1 << lastpair.second->layer) |
        (1 << pair.first->layer) | (1 << pair.second->layer));
  hitbits = hitbits >> minlyr; // now bit list starts with lowest hit layer
 
  int hitlyrs = std::popcount(hitbits);
 
  assert(hitbits & 0x1);
 
  unsigned retv = 0;
  if (hitlyrs == 2) // must be same layers
  {
    retv = 1;
  } else if (hitlyrs == 3) {
    if (hitbits == 0b111) // 3 bits in a row -> adjacent layers
    {
      if ((lastpair.first->layer == pair.second->layer) ||
          (pair.first->layer == lastpair.second->layer)) {
        retv = 2; // sequential
      } else {
        retv = 3; // one is a skip and the other isn't
      }
    } else if ((hitbits == 0b1101) || (hitbits == 0b1011)) // skips 1 layer
    {
      retv = 4;
    }
  } else {
    retv = 5;
  }
 
  ATH_MSG_VERBOSE("pairpairCat "
                  << m_twoPairClasses[retv] << " " << lastpair.first->layer
                  << " " << lastpair.second->layer << " "
                  << pair.first->layer << " " << pair.second->layer << " : "
                  << minlyr << " " << std::bitset<16>(hitbits));
 
  return retv;
}
 
void FPGATrackSimGenScanMonitoring::fillPairSetFilterCut(
    std::vector<TH1D *> & histset, double val,
    const FPGATrackSimGenScanTool::HitPair &pair,
    const FPGATrackSimGenScanTool::HitPair &lastpair, bool nminus1) {
 
  if (m_binPlotsActive) {
    unsigned ppcat = pairpairCategory(pair, lastpair);
    histset[0]->Fill(val);     // 0 is "all"
    histset[ppcat]->Fill(val); // 0 is "all"
    if (nminus1)
      histset[m_nminus1_idx]->Fill(val);
  }
}
 
void FPGATrackSimGenScanMonitoring::pairSetFilterCheck(
    const FPGATrackSimGenScanTool::HitPairSet &filteredpairs,
    const std::vector<FPGATrackSimGenScanTool::HitPairSet> &pairsets,
    unsigned threshold) {
  m_pairsets->Fill(pairsets.size());
 
  for (const auto &pairset : pairsets) {
    // if over threshold add it to the output
    if (pairset.lyrCnt() >= threshold) {
      m_roadFilterFlow->Fill(3);
      m_passPairSetFilterGraph.addEvent(pairset.hitlist);
    } else {
      m_lostPairSetFilterGraph.addEvent(filteredpairs.hitlist);
    }
  }
}
 
void FPGATrackSimGenScanMonitoring::fillBuildGroupsWithPairs(
    const std::vector<FPGATrackSimGenScanTool::IntermediateState> &states,
    unsigned allowed_misses) {
 
  for (unsigned i = 0; i < states.size(); i++) {
    m_unpairedHits->Fill(i, states[i].unpairedHits.size());
    m_pairsetsIncr->Fill(i, states[i].pairsets.size());
    for (auto &pair : states[i].pairsets) {
      m_pairsetsHits->Fill(i, pair.hitlist.size());
    }
    unsigned totalInput =
        states[i].pairsets.size() + states[i].unpairedHits.size();
    m_totalInputIncr->Fill(i, totalInput);
    m_binStagesIncr->Fill(i, (i <= allowed_misses) || (totalInput > 0));
  }
}
 
// Event Disply Implementation
TGraph *FPGATrackSimGenScanMonitoring::eventDispSet::initGraph(
    const std::string &name) {
  TGraph *retv = new TGraph();
  retv->SetName(name.c_str());
  return retv;
}
 
void FPGATrackSimGenScanMonitoring::eventDispSet::AddPoint(
    TGraph * g, double x, double y) {
  g->SetPoint(g->GetN(), x, y);
}
 
 
void FPGATrackSimGenScanMonitoring::eventDispSet::addEvent(const std::vector<std::shared_ptr<const FPGATrackSimHit>> &hits) {
  unsigned int count = m_rZ.size(); // both graph sets should have the same size
 
  // If over limit on number of event displays just return
  if (count > m_maxEvts)
    return;
  
  m_rZ.push_back(initGraph("EventDisp_RZ_" + m_name + std::to_string(count)));
  m_xY.push_back(initGraph("EventDisp_XY_" + m_name + std::to_string(count)));
 
  for (auto &hit : hits) {
    AddPoint(m_rZ.back(), hit->getZ(), hit->getR());
    AddPoint(m_xY.back(), hit->getX(), hit->getY());
  }
}
 
void FPGATrackSimGenScanMonitoring::eventDispSet::addEvent(const std::vector<FPGATrackSimBinUtil::StoredHit> &hits) {
  // If over limit on number of event displays just return
  if (m_rZ.size() > m_maxEvts) return;
 
  // convert vector of instances to vector of pointers to instances
  std::vector<const FPGATrackSimBinUtil::StoredHit *> ptrvec;
  for (auto &hit : hits) {
    ptrvec.push_back(&hit);
  }
 
  // then just call pointer-based implementation
  return addEvent(ptrvec);
}
 
void FPGATrackSimGenScanMonitoring::eventDispSet::addEvent(const std::vector<const FPGATrackSimBinUtil::StoredHit *> &hits) {
  unsigned int count = m_rZ.size(); // all four graph sets should have the same size
 
  // If over limit on number of event displays just return
  if (count > m_maxEvts) return;
 
  // make the graphs to store the event display points
  m_rZ.push_back(initGraph("EventDisp_RZ_" + m_name + std::to_string(count)));
  m_xY.push_back(initGraph("EventDisp_XY_" + m_name + std::to_string(count)));
  m_rPhi.push_back(initGraph("EventDisp_RPhi_" + m_name + std::to_string(count)));
  m_rEta.push_back(initGraph("EventDisp_REta_" + m_name + std::to_string(count)));
 
  for (auto &hit : hits) {
    AddPoint(m_rZ.back(), hit->hitptr->getZ(), hit->hitptr->getR());
    AddPoint(m_xY.back(), hit->hitptr->getX(), hit->hitptr->getY());
    AddPoint(m_rEta.back(), hit->etaShift, hit->hitptr->getR());
    AddPoint(m_rPhi.back(), hit->phiShift, hit->hitptr->getR());
  }
}
 
StatusCode FPGATrackSimGenScanMonitoring::eventDispSet::registerGraphs(FPGATrackSimGenScanMonitoring * parent) {
  // Make a vector of all the vectors of graphs and then loop to register
  // them all...
  for (auto &graphs : std::vector<std::vector<TGraph *> *>({&m_rZ, &m_xY, &m_rPhi, &m_rEta})) {
    for (auto &g : *graphs) {
      ATH_CHECK(parent->regGraph(g));
    }
  }
  return StatusCode::SUCCESS;
}