TrackStatePrinterTool.icc

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/*
  Copyright (C) 2002-2026 CERN for the benefit of the ATLAS collaboration
*/
 
// ATHENA
#include "xAODMeasurementBase/UncalibratedMeasurementContainer.h"
 #include "ActsCalibrators/xAODUncalibMeasCalibrator.h"
 
// ACTS CORE
#include "Acts/Geometry/TrackingGeometry.hpp"
#include "Acts/EventData/BoundTrackParameters.hpp"
#include "Acts/Utilities/detail/OstreamStateGuard.hpp"
// Other
#include <iostream>
#include <sstream>
 
namespace ActsTrk
{
  /// format all arguments and return as a string.
  /// Used here to apply std::setw() to the combination of values.
  template <typename... Types>
  static std::string to_string(Types &&...values)
  {
    std::ostringstream os;
    (os << ... << values);
    return os.str();
  }
 
  template <typename track_container_t>
  void
  TrackStatePrinterTool::printTrack(const Acts::GeometryContext &tgContext,
                    const track_container_t &tracks,
                    const typename track_container_t::TrackProxy &track,
                    const detail::MeasurementIndex &measurementIndexer,
                    bool rejected) const
  {
    const auto lastMeasurementIndex = track.tipIndex();
    // to print track states from inside outward, we need to reverse the order of visitBackwards().
    using TrackStateProxy = std::decay_t<decltype(tracks.trackStateContainer())>::ConstTrackStateProxy;
    std::vector<TrackStateProxy> states;
    states.reserve(lastMeasurementIndex + 1); // could be an overestimate
    std::size_t npixel = 0, nstrip = 0;
    tracks.trackStateContainer().visitBackwards(
        lastMeasurementIndex,
        [&states, &npixel, &nstrip](const TrackStateProxy &state) -> void
        {
          if (state.hasCalibrated())
          {
            if (state.calibratedSize() == 1)
              ++nstrip;
            else if (state.calibratedSize() == 2)
              ++npixel;
          }
          states.push_back(state);
        });
 
    if (track.nMeasurements() + track.nOutliers() != npixel + nstrip)
    {
      ATH_MSG_WARNING("Track has " << track.nMeasurements() + track.nOutliers() << " measurements + outliers, but "
                                    << npixel + nstrip << " pixel + strip hits");
    }
 
    const Acts::BoundTrackParameters per(track.referenceSurface().getSharedPtr(),
                                          track.parameters(),
                                          track.covariance(),
                                          track.particleHypothesis());
    Acts::detail::OstreamStateGuard s(std::cout);
    std::cout << std::setw(5) << lastMeasurementIndex << ' '
              << std::left
              << std::setw(4) << "parm" << ' '
              << std::setw(21) << actsSurfaceName(per.referenceSurface()) << ' '
              << std::setw(22) << to_string("#hit=", npixel, '/', nstrip, ", #hole=", track.nHoles()) << ' '
              << std::right;
    printParameters(per.referenceSurface(), tgContext, per.parameters());
    std::cout << std::fixed << std::setw(8) << ' '
              << std::setw(7) << std::setprecision(1) << track.chi2() << ' '
              << std::left
              << "#out=" << track.nOutliers()
              << ", #sh=" << track.nSharedHits()
              << (rejected ? " - REJECTED" : "")
              << std::right <<  '\n';
 
    for (auto i = states.size(); i > 0;)
    {
      printTrackState(tgContext, states[--i], measurementIndexer);
    }
  }
 
  template <typename track_state_proxy_t>
  bool
  TrackStatePrinterTool::printTrackState(const Acts::GeometryContext &tgContext,
                                         const track_state_proxy_t &state,
                                         const detail::MeasurementIndex &measurementIndexer,
                                         bool useFiltered,
                                         bool newLine) const
  {
    Acts::detail::OstreamStateGuard s(std::cout);
    if (!m_printFilteredStates && useFiltered)
      return false;
 
    ptrdiff_t index = -1;
 
    if (state.hasUncalibratedSourceLink())
    {
      const xAOD::UncalibratedMeasurement* umeas = detail::xAODUncalibMeasCalibrator::unpack(state.getUncalibratedSourceLink());;
      index = measurementIndexer.index(*umeas);
    }
 
    std::cout << std::setw(5) << state.index() << ' ';
    char ptype = !m_printFilteredStates ? ' '
                 : useFiltered          ? 'F'
                                        : 'S';
    if (state.hasCalibrated())
    {
      std::cout << ptype << std::setw(2) << state.calibratedSize() << 'D';
    }
    else if (state.typeFlags().isHole())
    {
      std::cout << std::setw(4) << "hole";
    }
    else
    {
      std::cout << ptype << std::setw(3) << " ";
    }
    std::cout << ' '
              << std::left
              << std::setw(21) << actsSurfaceName(state.referenceSurface()) << ' ';
    if (index >= 0)
    {
      std::cout << std::setw(22) << index << ' ';
    }
    else
    {
      std::cout << std::setw(22) << to_string(state.referenceSurface().geometryId()) << ' ';
    }
    std::cout << std::right;
    const auto &parameters = !useFiltered          ? state.parameters()
                             : state.hasFiltered() ? state.filtered()
                                                   : state.predicted();
    printParameters(state.referenceSurface(), tgContext, parameters);
    std::cout << ' '
              << std::fixed
              << std::setw(6) << std::setprecision(1) << state.pathLength() << ' '
              << std::setw(7) << std::setprecision(1) << state.chi2() << ' '
              << std::defaultfloat << std::setprecision(-1)
              << std::setw(Acts::toUnderlying(Acts::TrackStateFlag::NumFlags)) << trackStateName(state.typeFlags());
    if (newLine)
      std::cout << '\n';
    return true;
  }
 
}  // namespace ActsTrk