EVEVisualization.cc

/**************************************************************************
 * basf2 (Belle II Analysis Software Framework)                           *
 * Author: The Belle II Collaboration                                     *
 *                                                                        *
 * See git log for contributors and copyright holders.                    *
 * This file is licensed under LGPL-3.0, see LICENSE.md.                  *
 **************************************************************************/
 
//For GFTrack visualisation:
/* Copyright 2011, Technische Universitaet Muenchen,
   Author: Karl Bicker
 
   This file is part of GENFIT.
 
   GENFIT is free software: you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published
   by the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
   GENFIT is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU Lesser General Public License for more details.
 
   You should have received a copy of the GNU Lesser General Public License
   along with GENFIT.  If not, see <http://www.gnu.org/licenses/>.
*/
#include <display/EVEVisualization.h>
 
#include <display/VisualRepMap.h>
#include <display/EveGeometry.h>
#include <display/EveVisBField.h>
#include <display/ObjectInfo.h>
 
#include <vxd/geometry/GeoCache.h>
#include <klm/bklm/geometry/GeometryPar.h>
#include <cdc/geometry/CDCGeometryPar.h>
#include <cdc/dataobjects/CDCRecoHit.h>
#include <cdc/translators/RealisticTDCCountTranslator.h>
#include <arich/dbobjects/ARICHGeometryConfig.h>
#include <simulation/dataobjects/MCParticleTrajectory.h>
#include <svd/reconstruction/SVDRecoHit.h>
#include <top/geometry/TOPGeometryPar.h>
 
#include <genfit/AbsMeasurement.h>
#include <genfit/PlanarMeasurement.h>
#include <genfit/SpacepointMeasurement.h>
#include <genfit/WireMeasurement.h>
#include <genfit/WireMeasurementNew.h>
#include <genfit/WirePointMeasurement.h>
#include <genfit/DetPlane.h>
#include <genfit/Exception.h>
#include <genfit/KalmanFitterInfo.h>
#include <genfit/GblFitterInfo.h>
 
#include <framework/dataobjects/DisplayData.h>
#include <framework/logging/Logger.h>
#include <framework/utilities/ColorPalette.h>
#include <framework/geometry/VectorUtil.h>
 
#include <Math/VectorUtil.h>
#include <TEveArrow.h>
#include <TEveBox.h>
#include <TEveCalo.h>
#include <TEveManager.h>
#include <TEveGeoShape.h>
#include <TEveLine.h>
#include <TEvePointSet.h>
#include <TEveSelection.h>
#include <TEveStraightLineSet.h>
#include <TEveTriangleSet.h>
#include <TEveText.h>
#include <TEveTrack.h>
#include <TEveTrackPropagator.h>
#include <TGeoEltu.h>
#include <TGeoMatrix.h>
#include <TGeoManager.h>
#include <TGeoSphere.h>
#include <TGeoTube.h>
#include <TGLLogicalShape.h>
#include <TParticle.h>
#include <TMath.h>
#include <TVectorD.h>
#include <TMatrixD.h>
#include <TMatrixDSymEigen.h>
 
#include <boost/scoped_ptr.hpp>
#include <boost/algorithm/string/find.hpp>
#include <boost/algorithm/string/trim.hpp>
#include <boost/algorithm/string/classification.hpp>
 
#include <cassert>
#include <cmath>
 
using namespace Belle2;
using namespace Belle2::TangoPalette;
 
namespace {
  template <class T> void destroyEveElement(T*& el)
  {
    if (!el) return;
    if (el->GetDenyDestroy() > 1)
      B2WARNING("destroyEveElement(): Element " << el->GetName() << " has unexpected refcount " << el->GetDenyDestroy());
 
    el->DecDenyDestroy(); //also deletes el when refcount <= 0
    el = nullptr;
  }

  void fixGeoShapeRefCount(TEveGeoShape* eveshape)
  {
    TGeoShape* s = eveshape->GetShape();
    //Remove(obj) usually takes about 20us, but since usually s is at the end, we can shorten this
    if (gGeoManager->GetListOfShapes()->Last() == s)
      gGeoManager->GetListOfShapes()->RemoveAt(gGeoManager->GetListOfShapes()->GetLast());
    else
      gGeoManager->GetListOfShapes()->Remove(s);
  }
}
 
const int EVEVisualization::c_recoHitColor = getTColorID("Orange", 1);
const int EVEVisualization::c_unassignedHitColor = getTColorID("Plum", 1);
const int EVEVisualization::c_trackColor = getTColorID("Sky Blue", 2);
const int EVEVisualization::c_recoTrackColor = getTColorID("Sky Blue", 1);
const int EVEVisualization::c_trackMarkerColor = getTColorID("Chameleon", 3);
const int EVEVisualization::c_klmClusterColor = getTColorID("Chameleon", 1);
 
EVEVisualization::EVEVisualization():
  m_assignToPrimaries(false),
  m_eclData(0),
  m_bfield(new EveVisBField())
{
  setErrScale();
 
  TGLLogicalShape::SetIgnoreSizeForCameraInterest(kTRUE);     // Allows the visualization of the "small" error ellipsoid.
 
  //create new containers
  m_trackpropagator = new TEveTrackPropagator();
  m_trackpropagator->IncDenyDestroy();
  m_trackpropagator->SetMagFieldObj(m_bfield, false);
  m_trackpropagator->SetFitDaughters(false); //most secondaries are no longer immediate daughters since we might discard those!
  m_trackpropagator->SetMaxR(EveGeometry::getMaxR()); //don't draw tracks outside detector
  //TODO is this actually needed?
  m_trackpropagator->SetMaxStep(1.0); //make sure to reeval magnetic field often enough
 
  m_tracklist = new TEveTrackList(m_trackpropagator);
  m_tracklist->IncDenyDestroy();
  m_tracklist->SetName("MCParticles");
  m_tracklist->SelectByP(c_minPCut, FLT_MAX); //don't show too many particles by default...
 
  m_gftrackpropagator = new TEveTrackPropagator();
  m_gftrackpropagator->IncDenyDestroy();
  m_gftrackpropagator->SetMagFieldObj(m_bfield, false);
  m_gftrackpropagator->SetMaxOrbs(0.5); //stop after track markers
 
  m_consttrackpropagator = new TEveTrackPropagator();
  m_consttrackpropagator->IncDenyDestroy();
  m_consttrackpropagator->SetMagField(0, 0, -1.5);
  m_consttrackpropagator->SetMaxR(EveGeometry::getMaxR());
 
  m_calo3d = new TEveCalo3D(NULL, "ECLClusters");
  m_calo3d->SetBarrelRadius(125.80); //inner radius of ECL barrel
  m_calo3d->SetForwardEndCapPos(196.5); //inner edge of forward endcap
  m_calo3d->SetBackwardEndCapPos(-102.0); //inner edge of backward endcap
  m_calo3d->SetMaxValAbs(2.1);
  m_calo3d->SetRnrFrame(false, false); //don't show crystal grid
  m_calo3d->IncDenyDestroy();
 
  //Stop eve from deleting contents... (which might already be deleted)
  gEve->GetSelection()->IncDenyDestroy();
  gEve->GetHighlight()->IncDenyDestroy();
 
  clearEvent();
}
 
void EVEVisualization::setOptions(const std::string& opts) { m_options = opts; }
 
void EVEVisualization::setErrScale(double errScale) { m_errorScale = errScale; }
 
EVEVisualization::~EVEVisualization()
{
  if (!gEve)
    return; //objects are probably already freed by Eve
 
  //Eve objects
  destroyEveElement(m_eclData);
  destroyEveElement(m_unassignedRecoHits);
  destroyEveElement(m_tracklist);
  destroyEveElement(m_trackpropagator);
  destroyEveElement(m_gftrackpropagator);
  destroyEveElement(m_consttrackpropagator);
  destroyEveElement(m_calo3d);
  delete m_bfield;
}
 
void EVEVisualization::addTrackCandidate(const std::string& collectionName,
                                         const RecoTrack& recoTrack)
{
  const TString label = ObjectInfo::getIdentifier(&recoTrack);
  // parse the option string ------------------------------------------------------------------------
  bool drawHits = false;
 
  if (m_options != "") {
    for (size_t i = 0; i < m_options.length(); i++) {
      if (m_options.at(i) == 'H') drawHits = true;
    }
  }
  // finished parsing the option string -------------------------------------------------------------
 
 
  //track seeds
  const B2Vector3D& track_pos = recoTrack.getPositionSeed();
  const B2Vector3D& track_mom = recoTrack.getMomentumSeed();
 
  TEveStraightLineSet* lines = new TEveStraightLineSet("RecoHits for " + label);
  lines->SetMainColor(c_recoTrackColor);
  lines->SetMarkerColor(c_recoTrackColor);
  lines->SetMarkerStyle(6);
  lines->SetMainTransparency(60);
 
  if (drawHits) {
    // Loop over all hits in the track (three different types)
    for (const RecoHitInformation::UsedPXDHit* pxdHit : recoTrack.getPXDHitList()) {
      addRecoHit(pxdHit, lines);
    }
 
    for (const RecoHitInformation::UsedSVDHit* svdHit : recoTrack.getSVDHitList()) {
      addRecoHit(svdHit, lines);
    }
 
    for (const RecoHitInformation::UsedCDCHit* cdcHit : recoTrack.getCDCHitList()) {
      addRecoHit(cdcHit, lines);
    }
  }
 
  TEveRecTrack rectrack;
  rectrack.fP.Set(track_mom);
  rectrack.fV.Set(track_pos);
 
  TEveTrack* track_lines = new TEveTrack(&rectrack, m_gftrackpropagator);
  track_lines->SetName(label); //popup label set at end of function
  track_lines->SetPropagator(m_gftrackpropagator);
  track_lines->SetLineColor(c_recoTrackColor);
  track_lines->SetLineWidth(1);
  track_lines->SetTitle(ObjectInfo::getTitle(&recoTrack));
 
  track_lines->SetCharge((int)recoTrack.getChargeSeed());
 
 
  track_lines->AddElement(lines);
  addToGroup(collectionName, track_lines);
  addObject(&recoTrack, track_lines);
}
 
void EVEVisualization::addTrackCandidateImproved(const std::string& collectionName,
                                                 const RecoTrack& recoTrack)
{
  const TString label = ObjectInfo::getIdentifier(&recoTrack);
  // parse the option string ------------------------------------------------------------------------
  bool drawHits = false;
 
  if (m_options != "") {
    for (size_t i = 0; i < m_options.length(); i++) {
      if (m_options.at(i) == 'H') drawHits = true;
    }
  }
  // finished parsing the option string -------------------------------------------------------------
 
  // Create a track as a polyline through reconstructed points
  // FIXME this is snatched from PrimitivePlotter, need to add extrapolation out of CDC
  TEveLine* track = new TEveLine(); // We are going to just add points with SetNextPoint
  std::vector<ROOT::Math::XYZVector> posPoints; // But first we'll have to sort them as in RecoHits axial and stereo come in blocks
  track->SetName(label); //popup label set at end of function
  track->SetLineColor(c_recoTrackColor);
  track->SetLineWidth(3);
  track->SetTitle(ObjectInfo::getTitle(&recoTrack));
  track->SetSmooth(true);
 
  for (const auto recoHit : recoTrack.getRecoHitInformations()) {
    // skip for reco hits which have not been used in the fit (and therefore have no fitted information on the plane
    if (!recoHit->useInFit())
      continue;
 
    // Need TVector3 here for genfit interface below
    TVector3 pos;
    TVector3 mom;
    TMatrixDSym cov;
 
    try {
      const auto* trackPoint = recoTrack.getCreatedTrackPoint(recoHit);
      const auto* fittedResult = trackPoint->getFitterInfo();
      if (not fittedResult) {
        B2WARNING("Skipping unfitted track point");
        continue;
      }
      const genfit::MeasuredStateOnPlane& state = fittedResult->getFittedState();
      state.getPosMomCov(pos, mom, cov);
    } catch (const genfit::Exception&) {
      B2WARNING("Skipping state with strange pos, mom or cov");
      continue;
    }
 
    posPoints.push_back(ROOT::Math::XYZVector(pos.X(), pos.Y(), pos.Z()));
  }
 
  sort(posPoints.begin(), posPoints.end(),
  [](const ROOT::Math::XYZVector & a, const ROOT::Math::XYZVector & b) -> bool {
    return a.X() * a.X() + a.Y() * a.Y() > b.X() * b.X() + b.Y() * b.Y();
  });
  for (auto vec : posPoints) {
    track->SetNextPoint(vec.X(), vec.Y(), vec.Z());
  }
  // add corresponding hits     ---------------------------------------------------------------------
  TEveStraightLineSet* lines = new TEveStraightLineSet("RecoHits for " + label);
  lines->SetMainColor(c_recoTrackColor);
  lines->SetMarkerColor(c_recoTrackColor);
  lines->SetMarkerStyle(6);
  lines->SetMainTransparency(60);
 
  if (drawHits) {
    // Loop over all hits in the track (three different types)
    for (const RecoHitInformation::UsedPXDHit* pxdHit : recoTrack.getPXDHitList()) {
      addRecoHit(pxdHit, lines);
    }
 
    for (const RecoHitInformation::UsedSVDHit* svdHit : recoTrack.getSVDHitList()) {
      addRecoHit(svdHit, lines);
    }
 
    for (const RecoHitInformation::UsedCDCHit* cdcHit : recoTrack.getCDCHitList()) {
      addRecoHit(cdcHit, lines);
    }
  }
 
  track->AddElement(lines);
  addToGroup(collectionName, track);
  addObject(&recoTrack, track);
}
 

template <typename TriggerTrack>
void EVEVisualization::addCDCTriggerTrack(const std::string& collectionName,
                                          const TriggerTrack& trgTrack)
{
  const TString label = ObjectInfo::getIdentifier(&trgTrack);
 
  B2Vector3D track_pos(0, 0, trgTrack.getZ0());
  B2Vector3D track_mom = (trgTrack.getChargeSign() == 0) ?
                         trgTrack.getDirection() * 1000 :
                         trgTrack.getMomentum(1.5);
 
  TEveRecTrack rectrack;
  rectrack.fP.Set(track_mom);
  rectrack.fV.Set(track_pos);
 
  TEveTrack* track_lines = new TEveTrack(&rectrack, m_consttrackpropagator);
  track_lines->SetName(label); // popup label set at end of function
  track_lines->SetPropagator(m_consttrackpropagator);
  track_lines->SetLineColor(kOrange + 2);
  track_lines->SetLineWidth(1);
 
  track_lines->SetTitle(ObjectInfo::getTitle(&trgTrack) +
                        TString::Format("\ncharge: %d, phi: %.2fdeg, pt: %.2fGeV, theta: %.2fdeg, z: %.2fcm",
                                        trgTrack.getChargeSign(),
                                        trgTrack.getPhi0() * 180 / M_PI,
                                        trgTrack.getTransverseMomentum(1.5),
                                        trgTrack.getDirection().Theta() * 180 / M_PI,
                                        trgTrack.getZ0()));
 
  track_lines->SetCharge(trgTrack.getChargeSign());
 
  // show 2D tracks with dashed lines
  if (trgTrack.getZ0() == 0 && trgTrack.getCotTheta() == 0)
    track_lines->SetLineStyle(2);
 
  addToGroup(collectionName, track_lines);
  addObject(&trgTrack, track_lines);
}
 
template void EVEVisualization::addCDCTriggerTrack<CDCTriggerTrack>(
  const std::string&, const CDCTriggerTrack&);
 
template void EVEVisualization::addCDCTriggerTrack<CDCTrigger3DHTrack>(
  const std::string&, const CDCTrigger3DHTrack&);
 
void EVEVisualization::addTrack(const Belle2::Track* belle2Track)
{
  // load the pion fit hypothesis or the hypothesis which is the closest in mass to a pion
  // the tracking will not always successfully fit with a pion hypothesis
  const TrackFitResult* fitResult = belle2Track->getTrackFitResultWithClosestMass(Const::pion);
  if (!fitResult) {
    B2ERROR("Track without TrackFitResult skipped.");
    return;
  }
  const RecoTrack* track = belle2Track->getRelated<RecoTrack>();
 
  const TString label = ObjectInfo::getIdentifier(belle2Track) + " (" + ObjectInfo::getIdentifier(fitResult) + ")";
 
  // parse the option string ------------------------------------------------------------------------
  bool drawDetectors = false;
  bool drawHits = false;
  bool drawPlanes = false;
 
  if (m_options != "") {
    for (size_t i = 0; i < m_options.length(); i++) {
      if (m_options.at(i) == 'D') drawDetectors = true;
      if (m_options.at(i) == 'H') drawHits = true;
      if (m_options.at(i) == 'P') drawPlanes = true;
    }
  }
  // finished parsing the option string -------------------------------------------------------------
 
  // We loop over all points (scattering non-measurement points for GBL)
  // and for Kalman we skip those with no measurements, which should
  // not be there
  bool isPruned = (track == nullptr);
 
 
  TEveRecTrackD recTrack;
  const B2Vector3D& poca = fitResult->getPosition();
  recTrack.fV.Set(poca);
 
  const B2Vector3D& poca_momentum = fitResult->getMomentum();
  if (std::isfinite(poca_momentum.Mag()))
    recTrack.fP.Set(poca_momentum);
  else //use 1TeV momentum for tracks without curvature
    recTrack.fP.Set(B2Vector3D(fitResult->getHelix().getDirection() * 1000));
 
  recTrack.fSign = fitResult->getChargeSign();
  TEveTrack* eveTrack = new TEveTrack(&recTrack, m_gftrackpropagator);
  eveTrack->SetName(label);
 
 
  if (track) {
    const genfit::AbsTrackRep* representation;
 
    if (m_drawCardinalRep) {
      representation = track->getCardinalRepresentation();
      B2DEBUG(100, "Draw cardinal rep");
    } else {
      const auto& representations = track->getRepresentations();
      if (representations.empty()) {
        B2ERROR("No representations found in the reco track!");
        return;
      }
      B2DEBUG(100, "Draw representation number 0.");
      representation = representations.front();
    }
 
    if (!track->hasTrackFitStatus(representation)) {
      B2ERROR("RecoTrack without FitStatus: will be skipped!");
      return;
    }
 
    const genfit::FitStatus* fitStatus = track->getTrackFitStatus(representation);
 
    isPruned = fitStatus->isTrackPruned();
 
    // GBL and Kalman cannot mix in a track.
    // What is 0 after first loop will stay 0:
    genfit::KalmanFitterInfo* fi = 0;
    genfit::KalmanFitterInfo* prevFi = 0;
    genfit::GblFitterInfo* gfi = 0;
    genfit::GblFitterInfo* prevGFi = 0;
    const genfit::MeasuredStateOnPlane* fittedState(NULL);
    const genfit::MeasuredStateOnPlane* prevFittedState(NULL);
 
 
    const auto& hitPoints = track->getHitPointsWithMeasurement();
    const unsigned int numpoints = hitPoints.size();
 
    int hitCounter = -1;
    for (const genfit::TrackPoint* tp : hitPoints) { // loop over all points in the track
      hitCounter++;
 
      // get the fitter infos ------------------------------------------------------------------
      if (! tp->hasFitterInfo(representation)) {
        B2ERROR("trackPoint has no fitterInfo for rep");
        continue;
      }
 
      genfit::AbsFitterInfo* fitterInfo = tp->getFitterInfo(representation);
 
      fi = dynamic_cast<genfit::KalmanFitterInfo*>(fitterInfo);
      gfi = dynamic_cast<genfit::GblFitterInfo*>(fitterInfo);
 
      if (!gfi && !fi) {
        B2ERROR("Can only display KalmanFitterInfo or GblFitterInfo");
        continue;
      }
 
      if (gfi && fi)
        B2FATAL("AbsFitterInfo dynamic-casted to both KalmanFitterInfo and GblFitterInfo!");
 
 
      if (fi && ! tp->hasRawMeasurements()) {
        B2ERROR("trackPoint has no raw measurements");
        continue;
      }
 
      if (fi && ! fi->hasPredictionsAndUpdates()) {
        B2ERROR("KalmanFitterInfo does not have all predictions and updates");
        continue;
      }
 
      try {
        if (gfi)
          fittedState = &(gfi->getFittedState(true));
        if (fi)
          fittedState = &(fi->getFittedState(true));
      } catch (genfit::Exception& e) {
        B2ERROR(e.what() << " - can not get fitted state");
        continue;
      }
 
      ROOT::Math::XYZVector track_pos = ROOT::Math::XYZVector(representation->getPos(*fittedState));
 
      // draw track if corresponding option is set ------------------------------------------
      if (prevFittedState != NULL) {
 
        TEvePathMark::EType_e markType = TEvePathMark::kReference;
        if (hitCounter + 1 == static_cast<int>(numpoints)) //track should stop here.
          markType = TEvePathMark::kDecay;
 
        // Kalman: non-null prevFi ensures that the previous fitter info was also KalmanFitterInfo
        if (fi && prevFi) {
          makeLines(eveTrack, prevFittedState, fittedState, representation, markType, m_drawErrors);
          if (m_drawErrors) { // make sure to draw errors in both directions
            makeLines(eveTrack, prevFittedState, fittedState, representation, markType, m_drawErrors, 0);
          }
          //these are currently disabled.
          //TODO: if activated, I want to have a separate TEveStraightLineSet instead of eveTrack (different colors/options)
          if (m_drawForward)
            makeLines(eveTrack, prevFi->getForwardUpdate(), fi->getForwardPrediction(), representation, markType, m_drawErrors, 0);
          if (m_drawBackward)
            makeLines(eveTrack, prevFi->getBackwardPrediction(), fi->getBackwardUpdate(), representation, markType, m_drawErrors);
          // draw reference track if corresponding option is set ------------------------------------------
          if (m_drawRefTrack && fi->hasReferenceState() && prevFi->hasReferenceState())
            makeLines(eveTrack, prevFi->getReferenceState(), fi->getReferenceState(), representation, markType, false);
        }
 
        // GBL: non-null prevGFi ensures that the previous fitter info was also GblFitterInfo
        if (gfi && prevGFi) {
          makeLines(eveTrack, prevFittedState, fittedState, representation, markType, m_drawErrors);
          if (m_drawErrors) {
            makeLines(eveTrack, prevFittedState, fittedState, representation, markType, m_drawErrors, 0);
          }
 
          if (m_drawRefTrack && gfi->hasReferenceState() && prevGFi->hasReferenceState()) {
            genfit::StateOnPlane prevSop = prevGFi->getReferenceState();
            genfit::StateOnPlane sop = gfi->getReferenceState();
            makeLines(eveTrack, &prevSop, &sop, representation, markType, false);
          }
        }
 
      }
      prevFi = fi; // Kalman
      prevGFi = gfi; // GBL
      prevFittedState = fittedState;
 
 
      //loop over all measurements for this point (e.g. u and v-type strips)
      const int numMeasurements = tp->getNumRawMeasurements();
      for (int iMeasurement = 0; iMeasurement < numMeasurements; iMeasurement++) {
        const genfit::AbsMeasurement* m = tp->getRawMeasurement(iMeasurement);
 
        TVectorT<double> hit_coords;
        TMatrixTSym<double> hit_cov;
 
        if (fi) {
          // Kalman
          genfit::MeasurementOnPlane* mop = fi->getMeasurementOnPlane(iMeasurement);
          hit_coords.ResizeTo(mop->getState());
          hit_cov.ResizeTo(mop->getCov());
          hit_coords = mop->getState();
          hit_cov = mop->getCov();
        }
        if (gfi) {
          // GBL - has only one measurement (other should be already merged before the track is constructed)
          // That means tp->getNumRawMeasurements() returns 1 for tracks fitted by GBL, because GBLfit Module
          // merges all corresponding SVD strips to 2D combined clusters.
          genfit::MeasurementOnPlane gblMeas = gfi->getMeasurement();
          hit_coords.ResizeTo(gblMeas.getState());
          hit_cov.ResizeTo(gblMeas.getCov());
          hit_coords = gblMeas.getState();
          hit_cov = gblMeas.getCov();
        }
 
        // finished getting the hit infos -----------------------------------------------------
 
        // sort hit infos into variables ------------------------------------------------------
        ROOT::Math::XYZVector o = ROOT::Math::XYZVector(fittedState->getPlane()->getO());
        ROOT::Math::XYZVector u = ROOT::Math::XYZVector(fittedState->getPlane()->getU());
        ROOT::Math::XYZVector v = ROOT::Math::XYZVector(fittedState->getPlane()->getV());
 
        bool planar_hit = false;
        bool planar_pixel_hit = false;
        bool space_hit = false;
        bool wire_hit = false;
        bool wirepoint_hit = false;
        double_t hit_u = 0;
        double_t hit_v = 0;
        double_t plane_size = 4;
 
        if (dynamic_cast<const genfit::PlanarMeasurement*>(m) != NULL) {
          int hit_coords_dim = m->getDim();
          planar_hit = true;
          if (hit_coords_dim == 1) {
            hit_u = hit_coords(0);
          } else if (hit_coords_dim == 2) {
            planar_pixel_hit = true;
            hit_u = hit_coords(0);
            hit_v = hit_coords(1);
          }
        } else if (dynamic_cast<const genfit::SpacepointMeasurement*>(m) != NULL) {
          space_hit = true;
        } else if (dynamic_cast<const CDCRecoHit*>(m)
                   || dynamic_cast<const genfit::WireMeasurement*>(m)
                   || dynamic_cast<const genfit::WireMeasurementNew*>(m)) {
          wire_hit = true;
          hit_u = fabs(hit_coords(0));
          hit_v = v.Dot(track_pos - o); // move the covariance tube so that the track goes through it
          if (dynamic_cast<const genfit::WirePointMeasurement*>(m) != NULL) {
            wirepoint_hit = true;
            hit_v = hit_coords(1);
          }
        } else {
          B2ERROR("Hit " << hitCounter << ", Measurement " << iMeasurement << ": Unknown measurement type: skipping hit!");
          break;
        }
 
        // finished setting variables ---------------------------------------------------------
 
        // draw planes if corresponding option is set -----------------------------------------
        if (drawPlanes || (drawDetectors && planar_hit)) {
          ROOT::Math::XYZVector move(0, 0, 0);
          if (wire_hit) move = v * (v.Dot(track_pos - o)); // move the plane along the wire until the track goes through it
          TEveBox* box = boxCreator(o + move, u, v, plane_size, plane_size, 0.01);
          if (drawDetectors && planar_hit) {
            box->SetMainColor(kCyan);
          } else {
            box->SetMainColor(kGray);
          }
          box->SetMainTransparency(50);
          eveTrack->AddElement(box);
        }
        // finished drawing planes ------------------------------------------------------------
 
        // draw detectors if option is set, only important for wire hits ----------------------
        if (drawDetectors) {
 
          if (wire_hit) {
            TEveGeoShape* det_shape = new TEveGeoShape("det_shape");
            det_shape->SetShape(new TGeoTube(std::max(0., (double)(hit_u - 0.0105 / 2.)), hit_u + 0.0105 / 2., plane_size));
            fixGeoShapeRefCount(det_shape);
 
            ROOT::Math::XYZVector norm = u.Cross(v);
            TGeoRotation det_rot("det_rot", (u.Theta() * 180) / TMath::Pi(), (u.Phi() * 180) / TMath::Pi(),
                                 (norm.Theta() * 180) / TMath::Pi(), (norm.Phi() * 180) / TMath::Pi(),
                                 (v.Theta() * 180) / TMath::Pi(), (v.Phi() * 180) / TMath::Pi()); // move the tube to the right place and rotate it correctly
            ROOT::Math::XYZVector move = v * (v.Dot(track_pos - o)); // move the tube along the wire until the track goes through it
            TGeoCombiTrans det_trans(o.X() + move.X(),
                                     o.Y() + move.Y(),
                                     o.Z() + move.Z(),
                                     &det_rot);
            det_shape->SetTransMatrix(det_trans);
            det_shape->SetMainColor(kCyan);
            det_shape->SetMainTransparency(25);
            if ((drawHits && (hit_u + 0.0105 / 2 > 0)) || !drawHits) {
              eveTrack->AddElement(det_shape);
            }
          }
 
        }
        // finished drawing detectors ---------------------------------------------------------
 
        if (drawHits) {
 
          // draw planar hits, with distinction between strip and pixel hits ----------------
          if (planar_hit) {
            if (!planar_pixel_hit) {
              //strip hit
              static VXD::GeoCache& geo = VXD::GeoCache::getInstance();
              const SVDRecoHit* recoHit = dynamic_cast<const SVDRecoHit*>(m);
              if (!recoHit) {
                B2WARNING("SVD recohit couldn't be converted... ");
                continue;
              }
 
              const VXD::SensorInfoBase& sensor = geo.getSensorInfo(recoHit->getSensorID());
              double du, dv;
              ROOT::Math::XYZVector a = o; //defines position of sensor plane
              double hit_res_u = hit_cov(0, 0);
              if (recoHit->isU()) {
                du = std::sqrt(hit_res_u);
                dv = sensor.getLength();
                a += hit_u * u;
              } else {
                du = sensor.getWidth();
                dv = std::sqrt(hit_res_u);
                a += hit_u * v;
              }
              double depth = sensor.getThickness();
              TEveBox* hit_box = boxCreator(a, u, v, du, dv, depth);
              hit_box->SetName("SVDRecoHit");
              hit_box->SetMainColor(c_recoHitColor);
              hit_box->SetMainTransparency(0);
              eveTrack->AddElement(hit_box);
            } else {
              //pixel hit
              // calculate eigenvalues to draw error-ellipse ----------------------------
              TMatrixDSymEigen eigen_values(hit_cov);
              TEveGeoShape* cov_shape = new TEveGeoShape("PXDRecoHit");
              const TVectorD& ev = eigen_values.GetEigenValues();
              const TMatrixD& eVec = eigen_values.GetEigenVectors();
              double pseudo_res_0 = m_errorScale * std::sqrt(ev(0));
              double pseudo_res_1 = m_errorScale * std::sqrt(ev(1));
              // finished calculating, got the values -----------------------------------
 
              // calculate the semiaxis of the error ellipse ----------------------------
              cov_shape->SetShape(new TGeoEltu(pseudo_res_0, pseudo_res_1, 0.0105));
              fixGeoShapeRefCount(cov_shape);
              ROOT::Math::XYZVector pix_pos = o + hit_u * u + hit_v * v;
              ROOT::Math::XYZVector u_semiaxis = (pix_pos + eVec(0, 0) * u + eVec(1, 0) * v) - pix_pos;
              ROOT::Math::XYZVector v_semiaxis = (pix_pos + eVec(0, 1) * u + eVec(1, 1) * v) - pix_pos;
              ROOT::Math::XYZVector norm = u.Cross(v);
              // finished calculating ---------------------------------------------------
 
              // rotate and translate everything correctly ------------------------------
              TGeoRotation det_rot("det_rot", (u_semiaxis.Theta() * 180) / TMath::Pi(), (u_semiaxis.Phi() * 180) / TMath::Pi(),
                                   (v_semiaxis.Theta() * 180) / TMath::Pi(), (v_semiaxis.Phi() * 180) / TMath::Pi(),
                                   (norm.Theta() * 180) / TMath::Pi(), (norm.Phi() * 180) / TMath::Pi());
              TGeoCombiTrans det_trans(pix_pos.X(), pix_pos.Y(), pix_pos.Z(), &det_rot);
              cov_shape->SetTransMatrix(det_trans);
              // finished rotating and translating --------------------------------------
 
              cov_shape->SetMainColor(c_recoHitColor);
              cov_shape->SetMainTransparency(0);
              eveTrack->AddElement(cov_shape);
            }
          }
          // finished drawing planar hits ---------------------------------------------------
 
          // draw spacepoint hits -----------------------------------------------------------
          if (space_hit) {
 
            // get eigenvalues of covariance to know how to draw the ellipsoid ------------
            TMatrixDSymEigen eigen_values(m->getRawHitCov());
            TEveGeoShape* cov_shape = new TEveGeoShape("SpacePoint Hit");
            cov_shape->SetShape(new TGeoSphere(0., 1.));
            fixGeoShapeRefCount(cov_shape);
            const TVectorD& ev = eigen_values.GetEigenValues();
            const TMatrixD& eVec = eigen_values.GetEigenVectors();
            ROOT::Math::XYZVector eVec1(eVec(0, 0), eVec(1, 0), eVec(2, 0));
            ROOT::Math::XYZVector eVec2(eVec(0, 1), eVec(1, 1), eVec(2, 1));
            ROOT::Math::XYZVector eVec3(eVec(0, 2), eVec(1, 2), eVec(2, 2));
            // got everything we need -----------------------------------------------------
 
 
            TGeoRotation det_rot("det_rot", (eVec1.Theta() * 180) / TMath::Pi(), (eVec1.Phi() * 180) / TMath::Pi(),
                                 (eVec2.Theta() * 180) / TMath::Pi(), (eVec2.Phi() * 180) / TMath::Pi(),
                                 (eVec3.Theta() * 180) / TMath::Pi(), (eVec3.Phi() * 180) / TMath::Pi()); // the rotation is already clear
 
            // set the scaled eigenvalues -------------------------------------------------
            double pseudo_res_0 = m_errorScale * std::sqrt(ev(0));
            double pseudo_res_1 = m_errorScale * std::sqrt(ev(1));
            double pseudo_res_2 = m_errorScale * std::sqrt(ev(2));
            // finished scaling -----------------------------------------------------------
 
            // rotate and translate -------------------------------------------------------
            TGeoGenTrans det_trans(o.X(), o.Y(), o.Z(),
                                   //std::sqrt(pseudo_res_0/pseudo_res_1/pseudo_res_2), std::sqrt(pseudo_res_1/pseudo_res_0/pseudo_res_2), std::sqrt(pseudo_res_2/pseudo_res_0/pseudo_res_1), // this workaround is necessary due to the "normalization" performed in  TGeoGenTrans::SetScale
                                   //1/(pseudo_res_0),1/(pseudo_res_1),1/(pseudo_res_2),
                                   pseudo_res_0, pseudo_res_1, pseudo_res_2,
                                   &det_rot);
            cov_shape->SetTransMatrix(det_trans);
            // finished rotating and translating ------------------------------------------
 
            cov_shape->SetMainColor(c_recoHitColor);
            cov_shape->SetMainTransparency(10);
            eveTrack->AddElement(cov_shape);
          }
          // finished drawing spacepoint hits -----------------------------------------------
 
          // draw wire hits -----------------------------------------------------------------
          if (wire_hit) {
            const double cdcErrorScale = 1.0;
            TEveGeoShape* cov_shape = new TEveGeoShape("CDCRecoHit");
            double pseudo_res_0 = cdcErrorScale * std::sqrt(hit_cov(0, 0));
            double pseudo_res_1 = plane_size;
            if (wirepoint_hit) pseudo_res_1 = cdcErrorScale * std::sqrt(hit_cov(1, 1));
 
            cov_shape->SetShape(new TGeoTube(std::max(0., (double)(hit_u - pseudo_res_0)), hit_u + pseudo_res_0, pseudo_res_1));
            fixGeoShapeRefCount(cov_shape);
            ROOT::Math::XYZVector norm = u.Cross(v);
 
            // rotate and translate -------------------------------------------------------
            TGeoRotation det_rot("det_rot", (u.Theta() * 180) / TMath::Pi(), (u.Phi() * 180) / TMath::Pi(),
                                 (norm.Theta() * 180) / TMath::Pi(), (norm.Phi() * 180) / TMath::Pi(),
                                 (v.Theta() * 180) / TMath::Pi(), (v.Phi() * 180) / TMath::Pi());
            TGeoCombiTrans det_trans(o.X() + hit_v * v.X(),
                                     o.Y() + hit_v * v.Y(),
                                     o.Z() + hit_v * v.Z(),
                                     &det_rot);
            cov_shape->SetTransMatrix(det_trans);
            // finished rotating and translating ------------------------------------------
 
            cov_shape->SetMainColor(c_recoHitColor);
            cov_shape->SetMainTransparency(50);
            eveTrack->AddElement(cov_shape);
          }
          // finished drawing wire hits -----------------------------------------------------
        }
 
      }
    }
 
    auto& firstref = eveTrack->RefPathMarks().front();
    auto& lastref = eveTrack->RefPathMarks().back();
    double f = firstref.fV.Distance(recTrack.fV);
    double b = lastref.fV.Distance(recTrack.fV);
    if (f > 100 and f > b) {
      B2WARNING("Decay vertex is much closer to POCA than first vertex, reversing order of track points... (this is intended for cosmic tracks, if you see this message in other context it might indicate a problem)");
      //last ref is better than first...
      lastref.fType = TEvePathMarkD::kReference;
      firstref.fType = TEvePathMarkD::kDecay;
      std::reverse(eveTrack->RefPathMarks().begin(), eveTrack->RefPathMarks().end());
    }
  }
  eveTrack->SetTitle(TString::Format("%s\n"
                                     "pruned: %s\n"
                                     "pT=%.3f, pZ=%.3f\n"
                                     "pVal: %e",
                                     label.Data(),
                                     isPruned ? " yes" : "no",
                                     poca_momentum.Pt(), poca_momentum.Pz(),
                                     fitResult->getPValue()
                                    ));
  eveTrack->SetLineColor(c_trackColor);
  eveTrack->SetLineStyle(1);
  eveTrack->SetLineWidth(3.0);
 
 
  addToGroup("Fitted Tracks", eveTrack);
  if (track)
    addObject(track, eveTrack);
  addObject(belle2Track, eveTrack);
}
 
TEveBox* EVEVisualization::boxCreator(const ROOT::Math::XYZVector& o, ROOT::Math::XYZVector u, ROOT::Math::XYZVector v,
                                      float ud,
                                      float vd, float depth)
{
  //force minimum width of polygon to deal with Eve limits
  float min = 0.04;
  if (vd < min)
    vd = min;
  if (ud < min)
    ud = min;
  if (depth < min)
    depth = min;
 
  TEveBox* box = new TEveBox;
  box->SetPickable(true);
 
  ROOT::Math::XYZVector norm = u.Cross(v);
  u *= (0.5 * ud);
  v *= (0.5 * vd);
  norm *= (0.5 * depth);
 
 
  for (int k = 0; k < 8; ++k) {
    // Coordinates for all eight corners of the box
    // as two parallel rectangles, with vertices specified in clockwise direction
    int signU = ((k + 1) & 2) ? -1 : 1;
    int signV = (k & 4) ? -1 : 1;
    int signN = (k & 2) ? -1 : 1;
    float vertex[3];
    // for (int i = 0; i < 3; ++i) {
    //   vertex[i] = o(i) + signU * u(i) + signV * v(i) + signN * norm(i);
    // }
    vertex[0] = o.X() + signU * u.X() + signV * v.X() + signN * norm.X();
    vertex[1] = o.Y() + signU * u.Y() + signV * v.Y() + signN * norm.Y();
    vertex[2] = o.Z() + signU * u.Z() + signV * v.Z() + signN * norm.Z();
    box->SetVertex(k, vertex);
  }
 
  return box;
}
 
void EVEVisualization::makeLines(TEveTrack* eveTrack, const genfit::StateOnPlane* prevState,
                                 const genfit::StateOnPlane* state,
                                 const genfit::AbsTrackRep* rep,
                                 TEvePathMark::EType_e markType, bool drawErrors, int markerPos)
{
  using namespace genfit;
 
  // Need TVector3 for genfit interface
  TVector3 pos, dir, oldPos, oldDir;
  rep->getPosDir(*state, pos, dir);
  rep->getPosDir(*prevState, oldPos, oldDir);
 
  double distA = (pos - oldPos).Mag();
  double distB = distA;
  if ((pos - oldPos)*oldDir < 0)
    distA *= -1.;
  if ((pos - oldPos)*dir < 0)
    distB *= -1.;
 
  TEvePathMark mark(
    markType,
    TEveVector(pos.X(), pos.Y(), pos.Z()),
    TEveVector(dir.X(), dir.Y(), dir.Z())
  );
  eveTrack->AddPathMark(mark);
 
 
  if (drawErrors) {
    const MeasuredStateOnPlane* measuredState;
    if (markerPos == 0)
      measuredState = dynamic_cast<const MeasuredStateOnPlane*>(prevState);
    else
      measuredState = dynamic_cast<const MeasuredStateOnPlane*>(state);
 
    if (measuredState != NULL) {
 
      // step for evaluate at a distance from the original plane
      ROOT::Math::XYZVector eval;
      if (markerPos == 0)
        eval = 0.2 * distA * oldDir;
      else
        eval = -0.2 * distB * dir;
 
 
      // get cov at first plane
      TMatrixDSym cov;
      // Need TVector3 for genfit interface
      TVector3 position, direction;
      rep->getPosMomCov(*measuredState, position, direction, cov);
 
      // get eigenvalues & -vectors
      TMatrixDSymEigen eigen_values(cov.GetSub(0, 2, 0, 2));
      const TVectorD& ev = eigen_values.GetEigenValues();
      const TMatrixD& eVec = eigen_values.GetEigenVectors();
      ROOT::Math::XYZVector eVec1, eVec2;
      // limit
      static const double maxErr = 1000.;
      double ev0 = std::min(ev(0), maxErr);
      double ev1 = std::min(ev(1), maxErr);
      double ev2 = std::min(ev(2), maxErr);
 
      // get two largest eigenvalues/-vectors
      if (ev0 < ev1 && ev0 < ev2) {
        eVec1.SetXYZ(eVec(0, 1), eVec(1, 1), eVec(2, 1));
        eVec1 *= sqrt(ev1);
        eVec2.SetXYZ(eVec(0, 2), eVec(1, 2), eVec(2, 2));
        eVec2 *= sqrt(ev2);
      } else if (ev1 < ev0 && ev1 < ev2) {
        eVec1.SetXYZ(eVec(0, 0), eVec(1, 0), eVec(2, 0));
        eVec1 *= sqrt(ev0);
        eVec2.SetXYZ(eVec(0, 2), eVec(1, 2), eVec(2, 2));
        eVec2 *= sqrt(ev2);
      } else {
        eVec1.SetXYZ(eVec(0, 0), eVec(1, 0), eVec(2, 0));
        eVec1 *= sqrt(ev0);
        eVec2.SetXYZ(eVec(0, 1), eVec(1, 1), eVec(2, 1));
        eVec2 *= sqrt(ev1);
      }
 
      if (eVec1.Cross(eVec2).Dot(eval) < 0)
        eVec2 *= -1;
      //assert(eVec1.Cross(eVec2)*eval > 0);
 
      ROOT::Math::XYZVector oldEVec1(eVec1);
 
      const int nEdges = 24;
      std::vector<ROOT::Math::XYZVector> vertices;
 
      vertices.push_back(ROOT::Math::XYZVector(position));
 
      // vertices at plane
      for (int i = 0; i < nEdges; ++i) {
        const double angle = 2 * TMath::Pi() / nEdges * i;
        vertices.push_back(ROOT::Math::XYZVector(position) + cos(angle)*eVec1 + sin(angle)*eVec2);
      }
 
 
 
      SharedPlanePtr newPlane(new DetPlane(*(measuredState->getPlane())));
      newPlane->setO(position + XYZToTVector(eval));
 
      MeasuredStateOnPlane stateCopy(*measuredState);
      try {
        rep->extrapolateToPlane(stateCopy, newPlane);
      } catch (Exception& e) {
        B2ERROR(e.what());
        return;
      }
 
      // get cov at 2nd plane
      rep->getPosMomCov(stateCopy, position, direction, cov);
 
      // get eigenvalues & -vectors
      {
        TMatrixDSymEigen eigen_values2(cov.GetSub(0, 2, 0, 2));
        const TVectorD& eVal = eigen_values2.GetEigenValues();
        const TMatrixD& eVect = eigen_values2.GetEigenVectors();
        // limit
        ev0 = std::min(eVal(0), maxErr);
        ev1 = std::min(eVal(1), maxErr);
        ev2 = std::min(eVal(2), maxErr);
 
        // get two largest eigenvalues/-vectors
        if (ev0 < ev1 && ev0 < ev2) {
          eVec1.SetXYZ(eVect(0, 1), eVect(1, 1), eVect(2, 1));
          eVec1 *= sqrt(ev1);
          eVec2.SetXYZ(eVect(0, 2), eVect(1, 2), eVect(2, 2));
          eVec2 *= sqrt(ev2);
        } else if (ev1 < ev0 && ev1 < ev2) {
          eVec1.SetXYZ(eVect(0, 0), eVect(1, 0), eVect(2, 0));
          eVec1 *= sqrt(ev0);
          eVec2.SetXYZ(eVect(0, 2), eVect(1, 2), eVect(2, 2));
          eVec2 *= sqrt(ev2);
        } else {
          eVec1.SetXYZ(eVect(0, 0), eVect(1, 0), eVect(2, 0));
          eVec1 *= sqrt(ev0);
          eVec2.SetXYZ(eVect(0, 1), eVect(1, 1), eVect(2, 1));
        } eVec2 *= sqrt(ev1);
      }
 
      if (eVec1.Cross(eVec2).Dot(eval) < 0)
        eVec2 *= -1;
      //assert(eVec1.Cross(eVec2)*eval > 0);
 
      if (oldEVec1.Dot(eVec1) < 0) {
        eVec1 *= -1;
        eVec2 *= -1;
      }
 
      // vertices at 2nd plane
      double angle0 = ROOT::Math::VectorUtil::Angle(eVec1, oldEVec1);
      if (eVec1.Dot(eval.Cross(oldEVec1)) < 0)
        angle0 *= -1;
      for (int i = 0; i < nEdges; ++i) {
        const double angle = 2 * TMath::Pi() / nEdges * i - angle0;
        vertices.push_back(ROOT::Math::XYZVector(position) + cos(angle)*eVec1 + sin(angle)*eVec2);
      }
 
      vertices.push_back(ROOT::Math::XYZVector(position));
 
 
      TEveTriangleSet* error_shape = new TEveTriangleSet(vertices.size(), nEdges * 2);
      for (unsigned int k = 0; k < vertices.size(); ++k) {
        error_shape->SetVertex(k, vertices[k].X(), vertices[k].Y(), vertices[k].Z());
      }
 
      assert(vertices.size() == 2 * nEdges + 2);
 
      int iTri(0);
      for (int i = 0; i < nEdges; ++i) {
        //error_shape->SetTriangle(iTri++,  0,             i+1,        (i+1)%nEdges+1);
        error_shape->SetTriangle(iTri++,  i + 1,           i + 1 + nEdges, (i + 1) % nEdges + 1);
        error_shape->SetTriangle(iTri++, (i + 1) % nEdges + 1, i + 1 + nEdges, (i + 1) % nEdges + 1 + nEdges);
        //error_shape->SetTriangle(iTri++,  2*nEdges+1,    i+1+nEdges, (i+1)%nEdges+1+nEdges);
      }
 
      //assert(iTri == nEdges*4);
 
      error_shape->SetMainColor(c_trackColor);
      error_shape->SetMainTransparency(25);
      eveTrack->AddElement(error_shape);
    }
  }
}
 
void EVEVisualization::addSimHit(const CDCSimHit* hit, const MCParticle* particle)
{
  addSimHit(ROOT::Math::XYZVector(hit->getPosWire()), particle);
}
void EVEVisualization::addSimHit(const PXDSimHit* hit, const MCParticle* particle)
{
  static VXD::GeoCache& geo = VXD::GeoCache::getInstance();
  const ROOT::Math::XYZVector& global_pos = geo.getSensorInfo(hit->getSensorID()).pointToGlobal(hit->getPosIn());
  addSimHit(global_pos, particle);
}
void EVEVisualization::addSimHit(const SVDSimHit* hit, const MCParticle* particle)
{
  static VXD::GeoCache& geo = VXD::GeoCache::getInstance();
  const ROOT::Math::XYZVector& global_pos = geo.getSensorInfo(hit->getSensorID()).pointToGlobal(hit->getPosIn());
  addSimHit(global_pos, particle);
}
void EVEVisualization::addSimHit(const KLMSimHit* hit, const MCParticle* particle)
{
  const ROOT::Math::XYZVector& global_pos = hit->getPosition();
  addSimHit(global_pos, particle);
}
void EVEVisualization::addSimHit(const ROOT::Math::XYZVector& v, const MCParticle* particle)
{
  MCTrack* track = addMCParticle(particle);
  if (!track)
    return; //hide hits from this particle
  track->simhits->SetNextPoint(v.X(), v.Y(), v.Z());
}
 
EVEVisualization::MCTrack* EVEVisualization::addMCParticle(const MCParticle* particle)
{
  if (!particle) {
    if (!m_mcparticleTracks[nullptr].simhits) {
      const TString pointsTitle("Unassigned SimHits");
      m_mcparticleTracks[nullptr].simhits = new TEvePointSet(pointsTitle);
      m_mcparticleTracks[nullptr].simhits->SetTitle(pointsTitle);
      m_mcparticleTracks[nullptr].simhits->SetMarkerStyle(6);
      m_mcparticleTracks[nullptr].simhits->SetMainColor(c_unassignedHitColor);
      //m_mcparticleTracks[nullptr].simhits->SetMainTransparency(50);
      m_mcparticleTracks[nullptr].track = NULL;
    }
    return &m_mcparticleTracks[nullptr];
  }
 
  if (m_hideSecondaries and !particle->hasStatus(MCParticle::c_PrimaryParticle)) {
    return NULL;
  }
  if (m_assignToPrimaries) {
    while (!particle->hasStatus(MCParticle::c_PrimaryParticle) and particle->getMother())
      particle = particle->getMother();
  }
 
  if (!m_mcparticleTracks[particle].track) {
    const ROOT::Math::XYZVector& p = particle->getMomentum();
    const ROOT::Math::XYZVector& vertex = particle->getProductionVertex();
    const int pdg = particle->getPDG();
    TParticle tparticle(pdg, particle->getStatus(),
                        (particle->getMother() ? particle->getMother()->getIndex() : 0), 0, particle->getFirstDaughter(), particle->getLastDaughter(),
                        p.X(), p.Y(), p.Z(), particle->getEnergy(),
                        vertex.X(), vertex.Y(), vertex.Z(), particle->getProductionTime());
    TEveMCTrack mctrack;
    mctrack = tparticle;
    mctrack.fTDecay = particle->getDecayTime();
    mctrack.fVDecay.Set(B2Vector3D(particle->getDecayVertex()));
    mctrack.fDecayed = !std::isinf(mctrack.fTDecay);
    mctrack.fIndex = particle->getIndex();
    m_mcparticleTracks[particle].track = new TEveTrack(&mctrack, m_trackpropagator);
 
    //Check if there is a trajectory stored for this particle
    const auto mcTrajectories = particle->getRelationsTo<MCParticleTrajectory>();
    bool hasTrajectory(false);
    for (auto rel : mcTrajectories.relations()) {
      //Trajectories with negative weight are from secondary daughters which
      //were ignored so we don't use them.
      if (rel.weight <= 0)  continue;
      //Found one, let's add tose point as reference points to the TEveTrack.
      //This will force the track propagation to visit all points in order but
      //provide smooth helix interpolation between the points
      const MCParticleTrajectory& trajectory = dynamic_cast<const MCParticleTrajectory&>(*rel.object);
      for (const MCTrajectoryPoint& pt : trajectory) {
        m_mcparticleTracks[particle].track->AddPathMark(
          TEvePathMark(
            //Add the last trajectory point as decay point to prevent TEve to
            //propagate beyond the end of the track. So lets compare the address
            //to the address of last point and choose the pathmark accordingly
            (&pt == &trajectory.back()) ? TEvePathMark::kDecay : TEvePathMark::kReference,
            TEveVector(pt.x, pt.y, pt.z),
            TEveVector(pt.px, pt.py, pt.pz)
          ));
      }
      //"There can only be One" -> found a trajectory, stop the loop
      hasTrajectory = true;
      break;
    }
 
    //If we have the full trajectory there is no need to add additional path marks
    if (!hasTrajectory) {
      //add daughter vertices - improves track rendering as lost momentum is taken into account
      for (int iDaughter = particle->getFirstDaughter(); iDaughter <= particle->getLastDaughter(); iDaughter++) {
        if (iDaughter == 0)
          continue; //no actual daughter
 
        const MCParticle* daughter = StoreArray<MCParticle>()[iDaughter - 1];
 
        TEvePathMarkD refMark(TEvePathMarkD::kDaughter);
        refMark.fV.Set(B2Vector3D(daughter->getProductionVertex()));
        refMark.fP.Set(B2Vector3D(daughter->getMomentum()));
        refMark.fTime = daughter->getProductionTime();
        m_mcparticleTracks[particle].track->AddPathMark(refMark);
      }
 
      //neutrals and very short-lived particles should stop somewhere
      //(can result in wrong shapes for particles stopped in the detector, so not used there)
      if ((TMath::Nint(particle->getCharge()) == 0 or !particle->hasStatus(MCParticle::c_StoppedInDetector))
          and mctrack.fDecayed) {
        TEvePathMarkD decayMark(TEvePathMarkD::kDecay);
        decayMark.fV.Set(B2Vector3D(particle->getDecayVertex()));
        m_mcparticleTracks[particle].track->AddPathMark(decayMark);
      }
    }
    TString particle_name(mctrack.GetName());
 
    //set track title (for popup)
    const MCParticle* mom = particle->getMother();
    if (mom) {
      m_mcparticleTracks[particle].parentParticle = mom;
      addMCParticle(mom);
    }
 
    TString title = ObjectInfo::getTitle(particle);
    if (!hasTrajectory) {
      //Hijack the mother label to show that the track position is only
      //extrapolated, not known from simulation
      title += "\n(track estimated from initial momentum)";
      //Also, show those tracks with dashed lines
      m_mcparticleTracks[particle].track->SetLineStyle(2);
    }
 
    m_mcparticleTracks[particle].track->SetTitle(title);
 
    //add some color (avoid black & white)
    switch (abs(pdg)) {
      case 11:
        m_mcparticleTracks[particle].track->SetLineColor(kAzure);
        break;
      case 13:
        m_mcparticleTracks[particle].track->SetLineColor(kCyan + 1);
        break;
      case 22:
        m_mcparticleTracks[particle].track->SetLineColor(kSpring);
        break;
      case 211:
        m_mcparticleTracks[particle].track->SetLineColor(kGray + 1);
        break;
      case 321:
        m_mcparticleTracks[particle].track->SetLineColor(kRed + 1);
        break;
      case 2212:
        m_mcparticleTracks[particle].track->SetLineColor(kOrange - 2);
        break;
      default:
        m_mcparticleTracks[particle].track->SetLineColor(kMagenta);
    }
 
    //create point set for hits
    const TString pointsTitle = "SimHits for " + ObjectInfo::getIdentifier(particle) + " - " + particle_name;
    m_mcparticleTracks[particle].simhits = new TEvePointSet(pointsTitle);
    m_mcparticleTracks[particle].simhits->SetTitle(pointsTitle);
    m_mcparticleTracks[particle].simhits->SetMarkerStyle(6);
    m_mcparticleTracks[particle].simhits->SetMainColor(m_mcparticleTracks[particle].track->GetLineColor());
    //m_mcparticleTracks[particle].simhits->SetMainTransparency(50);
    addObject(particle, m_mcparticleTracks[particle].track);
  }
  return &m_mcparticleTracks[particle];
}
 
void EVEVisualization::makeTracks()
{
  for (auto& mcTrackPair : m_mcparticleTracks) {
    MCTrack& mcTrack = mcTrackPair.second;
    if (mcTrack.track) {
      if (mcTrack.simhits->Size() > 0) {
        mcTrack.track->AddElement(mcTrack.simhits);
      } else {
        //if we don't add it, remove empty collection
        destroyEveElement(mcTrack.simhits);
      }
 
      TEveElement* parent = m_tracklist;
      if (mcTrack.parentParticle) {
        const auto& parentIt = m_mcparticleTracks.find(mcTrack.parentParticle);
        if (parentIt != m_mcparticleTracks.end()) {
          parent = parentIt->second.track;
        }
      }
      parent->AddElement(mcTrack.track);
    } else { //add simhits directly
      gEve->AddElement(mcTrack.simhits);
    }
  }
  gEve->AddElement(m_tracklist);
  m_tracklist->MakeTracks();
  m_tracklist->SelectByP(c_minPCut, FLT_MAX); //don't show too many particles by default...
 
  for (size_t i = 0; i < m_options.length(); i++) {
    if (m_options.at(i) == 'M') {
      m_gftrackpropagator->SetRnrDaughters(true);
      m_gftrackpropagator->SetRnrReferences(true);
      //m_gftrackpropagator->SetRnrFV(true); //TODO: this crashes?
      TMarker m;
      m.SetMarkerColor(c_trackMarkerColor);
      m.SetMarkerStyle(1); //a single pixel
      m.SetMarkerSize(1); //ignored.
      m_gftrackpropagator->RefPMAtt() = m;
      m_gftrackpropagator->RefFVAtt() = m;
    }
  }
 
  m_consttrackpropagator->SetMagField(0, 0, -1.5);
 
  m_eclData->DataChanged(); //update limits (Empty() won't work otherwise)
  if (!m_eclData->Empty()) {
    m_eclData->SetAxisFromBins(0.0,
                               0.0); //epsilon_x/y = 0 so we don't merge neighboring bins. This avoids some rendering issues with projections of small clusters.
    m_calo3d->SetData(m_eclData);
  }
  gEve->AddElement(m_calo3d);
 
  if (m_unassignedRecoHits) {
    m_unassignedRecoHits->SetRnrState(m_unassignedRecoHitsVisibility);
    gEve->AddElement(m_unassignedRecoHits);
  }
 
}
 
void EVEVisualization::clearEvent()
{
  if (!gEve)
    return;
 
  VisualRepMap::getInstance()->clear();
  for (auto& groupPair : m_groups) {
    //store visibility, invalidate pointers
    if (groupPair.second.group)
      groupPair.second.visible = groupPair.second.group->GetRnrState();
    groupPair.second.group = nullptr;
  }
 
  m_mcparticleTracks.clear();
  m_shownRecohits.clear();
  m_tracklist->DestroyElements();
 
  //remove ECL data from event
  m_calo3d->SetData(NULL);
  m_calo3d->DestroyElements();
 
  //lower energy threshold for ECL
  float ecl_threshold = 0.01;
  if (m_eclData)
    ecl_threshold = m_eclData->GetSliceThreshold(0);
 
  destroyEveElement(m_eclData);
  m_eclData = new TEveCaloDataVec(1); //#slices
  m_eclData->IncDenyDestroy();
  m_eclData->RefSliceInfo(0).Setup("ECL", ecl_threshold, kRed);
 
  if (m_unassignedRecoHits)
    m_unassignedRecoHitsVisibility = m_unassignedRecoHits->GetRnrState();
  destroyEveElement(m_unassignedRecoHits);
 
  gEve->GetSelection()->RemoveElements();
  gEve->GetHighlight()->RemoveElements();
  //other things are cleaned up by TEve...
}
 
 
 
 
void EVEVisualization::addVertex(const genfit::GFRaveVertex* vertex)
{
  ROOT::Math::XYZVector v = ROOT::Math::XYZVector(vertex->getPos());
  TEvePointSet* vertexPoint = new TEvePointSet(ObjectInfo::getInfo(vertex));
  //sadly, setting a title for a TEveGeoShape doesn't result in a popup...
  vertexPoint->SetTitle(ObjectInfo::getTitle(vertex));
  vertexPoint->SetMainColor(c_recoHitColor);
  vertexPoint->SetNextPoint(v.X(), v.Y(), v.Z());
 
  TMatrixDSymEigen eigen_values(vertex->getCov());
  TEveGeoShape* det_shape = new TEveGeoShape(ObjectInfo::getInfo(vertex) + " Error");
  det_shape->SetShape(new TGeoSphere(0., 1.));   //Initially created as a sphere, then "scaled" into an ellipsoid.
  fixGeoShapeRefCount(det_shape);
  const TVectorD& ev = eigen_values.GetEigenValues(); //Assigns the eigenvalues into the "ev" matrix.
  const TMatrixD& eVec = eigen_values.GetEigenVectors();  //Assigns the eigenvalues into the "eVec" matrix.
  //Define the 3 eigenvectors of the covariance matrix as objects of the ROOT::Math::XYZVector class using constructor.
  ROOT::Math::XYZVector eVec1(eVec(0, 0), eVec(1, 0), eVec(2, 0));
  //eVec(i,j) uses the method/overloaded operator ( . ) of the TMatrixT class to return the matrix entry.
  ROOT::Math::XYZVector eVec2(eVec(0, 1), eVec(1, 1), eVec(2, 1));
  ROOT::Math::XYZVector eVec3(eVec(0, 2), eVec(1, 2), eVec(2, 2));
  // got everything we need -----------------------------------------------------   //Eigenvalues(semi axis) of the covariance matrix acquired!
 
 
  TGeoRotation det_rot("det_rot", (eVec1.Theta() * 180) / TMath::Pi(), (eVec1.Phi() * 180) / TMath::Pi(),
                       (eVec2.Theta() * 180) / TMath::Pi(), (eVec2.Phi() * 180) / TMath::Pi(),
                       (eVec3.Theta() * 180) / TMath::Pi(), (eVec3.Phi() * 180) / TMath::Pi()); // the rotation is already clear
 
  // set the scaled eigenvalues -------------------------------------------------
  //"Scaled" eigenvalues pseudo_res (lengths of the semi axis) are the sqrt of the eigenvalues.
  double pseudo_res_0 = std::sqrt(ev(0));
  double pseudo_res_1 = std::sqrt(ev(1));
  double pseudo_res_2 = std::sqrt(ev(2));
 
  //B2INFO("The pseudo_res_0/1/2 are " << pseudo_res_0 << "," << pseudo_res_1 << "," << pseudo_res_2); //shows the scaled eigenvalues
 
 
 
  // rotate and translate -------------------------------------------------------
  TGeoGenTrans det_trans(v.X(), v.Y(), v.Z(), pseudo_res_0, pseudo_res_1, pseudo_res_2,
                         &det_rot); //Puts the ellipsoid at the position of the vertex, v(0)=v.X(), operator () overloaded.
  det_shape->SetTransMatrix(det_trans);
  // finished rotating and translating ------------------------------------------
 
  det_shape->SetMainColor(kOrange);   //The color of the error ellipsoid.
  det_shape->SetMainTransparency(0);
 
  vertexPoint->AddElement(det_shape);
  addToGroup("Vertices", vertexPoint);
  addObject(vertex, vertexPoint);
}
 
 
void EVEVisualization::addECLCluster(const ECLCluster* cluster)
{
 
  // only display c_nPhotons hypothesis clusters
  if (cluster->hasHypothesis(ECLCluster::EHypothesisBit::c_nPhotons)) {
 
    const float phi = cluster->getPhi();
    float dPhi = cluster->getUncertaintyPhi();
    float dTheta = cluster->getUncertaintyTheta();
    if (dPhi >= M_PI / 4 or dTheta >= M_PI / 4 or cluster->getUncertaintyEnergy() == 1.0) {
      B2WARNING("Found ECL cluster with broken errors (unit matrix or too large). Using 0.05 as error in phi/theta. The 3x3 error matrix previously was:");
      cluster->getCovarianceMatrix3x3().Print();
      dPhi = dTheta = 0.05;
    }
 
    if (!std::isfinite(dPhi) or !std::isfinite(dTheta)) {
      B2ERROR("ECLCluster phi or theta error is NaN or infinite, skipping cluster!");
      return;
    }
 
    //convert theta +- dTheta into eta +- dEta
    ROOT::Math::XYZVector thetaLow;
    VectorUtil::setPtThetaPhi(thetaLow, 1.0, cluster->getTheta() - dTheta, phi);
    ROOT::Math::XYZVector thetaHigh;
    VectorUtil::setPtThetaPhi(thetaHigh, 1.0, cluster->getTheta() + dTheta, phi);
    float etaLow = thetaLow.Eta();
    float etaHigh = thetaHigh.Eta();
    if (etaLow > etaHigh) {
      std::swap(etaLow, etaHigh);
    }
 
    int id = m_eclData->AddTower(etaLow, etaHigh, phi - dPhi, phi + dPhi);
    m_eclData->FillSlice(0, cluster->getEnergy(ECLCluster::EHypothesisBit::c_nPhotons));
    VisualRepMap::getInstance()->addCluster(cluster, m_eclData, id);
  }
}
 
void EVEVisualization::addKLMCluster(const KLMCluster* cluster)
{
  const double layerThicknessCm = 3.16; //TDR, Fig 10.2
  const double layerDistanceCm = 9.1 - layerThicknessCm;
 
  // Pposition of first RPC plane.
  ROOT::Math::XYZVector position = cluster->getClusterPosition();
  ROOT::Math::XYZVector startPos(position.X(), position.Y(), position.Z());
  ROOT::Math::XYZVector dir; //direction of cluster stack, Mag() == distance between planes
  ROOT::Math::XYZVector a, b; //defines RPC plane
  bool isBarrel = (startPos.Z() > -175.0 and startPos.Z() < 270.0);
  if (isBarrel) {
    //barrel
    b = ROOT::Math::XYZVector(0, 0, 1);
    a = startPos.Cross(b).Unit();
    double c = M_PI / 4.0;
    double offset = c / 2.0 + M_PI;
    VectorUtil::setPhi(a, int((a.Phi() + offset) / (c))*c - M_PI);
    ROOT::Math::XYZVector perp = b.Cross(a);
 
    const double barrelRadiusCm = 204.0;
    VectorUtil::setMag(startPos, barrelRadiusCm / perp.Dot(startPos.Unit()));
 
    dir = startPos.Unit();
    VectorUtil::setMag(dir, (layerDistanceCm + layerThicknessCm) / perp.Dot(dir));
  } else {
    //endcap
    b = ROOT::Math::XYZVector(startPos.X(), startPos.Y(), 0).Unit();
    a = startPos.Cross(b).Unit();
    double endcapStartZ = 284;
    if (startPos.Z() < 0)
      endcapStartZ = -189.5;
 
    double scaleFac = endcapStartZ / startPos.Z();
    VectorUtil::setMag(startPos, startPos.R() * scaleFac);
 
    dir = startPos.Unit();
    VectorUtil::setMag(dir, (layerDistanceCm + layerThicknessCm) / fabs(dir.Z()));
  }
 
  for (int i = 0; i < cluster->getLayers(); i++) {
    ROOT::Math::XYZVector layerPos = startPos;
    layerPos += (cluster->getInnermostLayer() + i) * dir;
    auto* layer = boxCreator(layerPos, a, b, 20.0, 20.0, layerThicknessCm / 2);
    layer->SetMainColor(c_klmClusterColor);
    layer->SetMainTransparency(70);
    layer->SetName(ObjectInfo::getIdentifier(cluster));
    layer->SetTitle(ObjectInfo::getTitle(cluster));
 
    addToGroup(std::string("KLMClusters/") + ObjectInfo::getIdentifier(cluster).Data(), layer);
    addObject(cluster, layer);
  }
}
 
void EVEVisualization::addBKLMHit2d(const KLMHit2d* bklm2dhit)
{
  const bklm::GeometryPar*  m_GeoPar = Belle2::bklm::GeometryPar::instance();
  const bklm::Module* module = m_GeoPar->findModule(bklm2dhit->getSection(), bklm2dhit->getSector(), bklm2dhit->getLayer());
 
  CLHEP::Hep3Vector global;
  //+++ global coordinates of the hit
  global[0] = bklm2dhit->getPositionX();
  global[1] = bklm2dhit->getPositionY();
  global[2] = bklm2dhit->getPositionZ();
 
  //+++ local coordinates of the hit
  CLHEP::Hep3Vector local = module->globalToLocal(global);
  //double localU = local[1]; //phi
  //double localV = local[2]; //z
  int Nphistrip = bklm2dhit->getPhiStripMax() - bklm2dhit->getPhiStripMin() + 1;
  int Nztrip = bklm2dhit->getZStripMax() - bklm2dhit->getZStripMin() + 1;
  double du = module->getPhiStripWidth() * Nphistrip;
  double dv = module->getZStripWidth() * Nztrip;
 
  //Let's do some simple thing
  CLHEP::Hep3Vector localU(local[0], local[1] + 1.0, local[2]);
  CLHEP::Hep3Vector localV(local[0], local[1], local[2] + 1.0);
 
  CLHEP::Hep3Vector globalU = module->localToGlobal(localU);
  CLHEP::Hep3Vector globalV = module->localToGlobal(localV);
 
  ROOT::Math::XYZVector o(global[0], global[1], global[2]);
  ROOT::Math::XYZVector u(globalU[0], globalU[1], globalU[2]);
  ROOT::Math::XYZVector v(globalV[0], globalV[1], globalV[2]);
 
  //Lest's just assign the depth is 1.0 cm (thickness of a layer), better to update
  TEveBox* bklmbox = boxCreator(o, u - o, v - o, du, dv, 1.0);
 
  bklmbox->SetMainColor(kGreen);
  //bklmbox->SetName((std::to_string(hitModule)).c_str());
  bklmbox->SetName("BKLMHit2d");
 
  addToGroup("BKLM2dHits", bklmbox);
  addObject(bklm2dhit, bklmbox);
}
 
void EVEVisualization::addEKLMHit2d(const KLMHit2d* eklm2dhit)
{
  const double du = 2.0;
  const double dv = 2.0;
  ROOT::Math::XYZVector hitPosition = eklm2dhit->getPosition();
  ROOT::Math::XYZVector o(hitPosition.X(), hitPosition.Y(), hitPosition.Z());
  ROOT::Math::XYZVector u(1.0, 0.0, 0.0);
  ROOT::Math::XYZVector v(0.0, 1.0, 0.0);
  TEveBox* eklmbox = boxCreator(o, u, v, du, dv, 4.0);
  eklmbox->SetMainColor(kGreen);
  eklmbox->SetName("EKLMHit2d");
  addToGroup("EKLM2dHits", eklmbox);
  addObject(eklm2dhit, eklmbox);
}
 
void EVEVisualization::addROI(const ROIid* roi)
{
  const VXD::GeoCache& aGeometry = VXD::GeoCache::getInstance();
 
  VxdID sensorID = roi->getSensorID();
  const VXD::SensorInfoBase& aSensorInfo = aGeometry.getSensorInfo(sensorID);
 
  double minU = aSensorInfo.getUCellPosition(roi->getMinUid(), roi->getMinVid());
  double minV = aSensorInfo.getVCellPosition(roi->getMinVid());
  double maxU = aSensorInfo.getUCellPosition(roi->getMaxUid(), roi->getMaxVid());
  double maxV = aSensorInfo.getVCellPosition(roi->getMaxVid());
 
 
  ROOT::Math::XYZVector localA(minU, minV, 0);
  ROOT::Math::XYZVector localB(minU, maxV, 0);
  ROOT::Math::XYZVector localC(maxU, minV, 0);
 
  ROOT::Math::XYZVector globalA = aSensorInfo.pointToGlobal(localA);
  ROOT::Math::XYZVector globalB = aSensorInfo.pointToGlobal(localB);
  ROOT::Math::XYZVector globalC = aSensorInfo.pointToGlobal(localC);
 
  TEveBox* ROIbox = boxCreator(globalB + globalC * 0.5, globalB - globalA, globalC - globalA, 1, 1, 0.01);
 
  ROIbox->SetName(ObjectInfo::getIdentifier(roi));
  ROIbox->SetMainColor(kSpring - 9);
  ROIbox->SetMainTransparency(50);
 
  addToGroup("ROIs", ROIbox);
  addObject(roi, ROIbox);
}
 
void EVEVisualization::addRecoHit(const SVDCluster* hit, TEveStraightLineSet* lines)
{
  static VXD::GeoCache& geo = VXD::GeoCache::getInstance();
  const VXD::SensorInfoBase& sensor = geo.getSensorInfo(hit->getSensorID());
 
  ROOT::Math::XYZVector a, b;
  if (hit->isUCluster()) {
    const float u = hit->getPosition();
    a = sensor.pointToGlobal(ROOT::Math::XYZVector(sensor.getBackwardWidth() / sensor.getWidth(0) * u, -0.5 * sensor.getLength(), 0.0));
    b = sensor.pointToGlobal(ROOT::Math::XYZVector(sensor.getForwardWidth() / sensor.getWidth(0) * u, +0.5 * sensor.getLength(), 0.0));
  } else {
    const float v = hit->getPosition();
    a = sensor.pointToGlobal(ROOT::Math::XYZVector(-0.5 * sensor.getWidth(v), v, 0.0));
    b = sensor.pointToGlobal(ROOT::Math::XYZVector(+0.5 * sensor.getWidth(v), v, 0.0));
  }
 
  lines->AddLine(a.X(), a.Y(), a.Z(), b.X(), b.Y(), b.Z());
  m_shownRecohits.insert(hit);
}
 
void EVEVisualization::addRecoHit(const CDCHit* hit, TEveStraightLineSet* lines)
{
  static CDC::CDCGeometryPar& cdcgeo = CDC::CDCGeometryPar::Instance();
  const ROOT::Math::XYZVector& wire_pos_f = cdcgeo.wireForwardPosition(WireID(hit->getID()));
  const ROOT::Math::XYZVector& wire_pos_b = cdcgeo.wireBackwardPosition(WireID(hit->getID()));
 
  lines->AddLine(wire_pos_f.X(), wire_pos_f.Y(), wire_pos_f.Z(), wire_pos_b.X(), wire_pos_b.Y(), wire_pos_b.Z());
  m_shownRecohits.insert(hit);
 
}
 
void EVEVisualization::addCDCHit(const CDCHit* hit, bool showTriggerHits)
{
  static CDC::CDCGeometryPar& cdcgeo = CDC::CDCGeometryPar::Instance();
  const B2Vector3D& wire_pos_f = cdcgeo.wireForwardPosition(WireID(hit->getID()));
  const B2Vector3D& wire_pos_b = cdcgeo.wireBackwardPosition(WireID(hit->getID()));
  static CDC::RealisticTDCCountTranslator tdcTranslator;
  TEveGeoShape* cov_shape = new TEveGeoShape("cov_shape");
  //TODO: leftrightflag not set! (same for other parameters, unsure which ones should be set)
  double driftLength = tdcTranslator.getDriftLength(hit->getTDCCount(), WireID(hit->getID()));
  double driftLengthRes = tdcTranslator.getDriftLengthResolution(driftLength, WireID(hit->getID()));
  driftLengthRes = std::max(driftLengthRes, 0.005);
  const double lengthOfWireSection = 3.0;
 
  //z in wire direction, x,y orthogonal
  const B2Vector3D zaxis = wire_pos_b - wire_pos_f;
  const B2Vector3D xaxis = zaxis.Orthogonal();
  const B2Vector3D yaxis = xaxis.Cross(zaxis);
 
  // move to z=0
  const B2Vector3D midPoint = wire_pos_f - zaxis * (wire_pos_f.Z() / zaxis.Z());
 
  cov_shape->SetShape(new TGeoTube(std::max(0., (double)(driftLength - driftLengthRes)), driftLength + driftLengthRes,
                                   lengthOfWireSection));
  fixGeoShapeRefCount(cov_shape);
 
  TGeoRotation det_rot("det_rot",
                       xaxis.Theta() * 180 / TMath::Pi(), xaxis.Phi() * 180 / TMath::Pi(),
                       yaxis.Theta() * 180 / TMath::Pi(), yaxis.Phi() * 180 / TMath::Pi(),
                       zaxis.Theta() * 180 / TMath::Pi(), zaxis.Phi() * 180 / TMath::Pi()
                      );
 
  TGeoCombiTrans det_trans(midPoint.X(), midPoint.Y(), midPoint.Z(), &det_rot);
  cov_shape->SetTransMatrix(det_trans);
 
  // get relation to trigger track segments
  bool isPartOfTS = false;
  const auto segments = hit->getRelationsFrom<CDCTriggerSegmentHit>();
  if (showTriggerHits && segments.size() > 0) {
    isPartOfTS = true;
  }
 
  if (hit->getISuperLayer() % 2 == 0) {
    if (isPartOfTS)
      cov_shape->SetMainColor(kCyan + 3);
    else
      cov_shape->SetMainColor(kCyan);
  } else {
    if (isPartOfTS)
      cov_shape->SetMainColor(kPink + 6);
    else
      cov_shape->SetMainColor(kPink + 7);
  }
 
  cov_shape->SetMainTransparency(50);
  cov_shape->SetName(ObjectInfo::getIdentifier(hit));
  cov_shape->SetTitle(ObjectInfo::getInfo(hit) + TString::Format("\nWire ID: %d\nADC: %d\nTDC: %d",
                      hit->getID(), hit->getADCCount(), hit->getTDCCount()));
 
  addToGroup("CDCHits", cov_shape);
  addObject(hit, cov_shape);
  if (isPartOfTS) {
    addToGroup("CDCTriggerSegmentHits", cov_shape);
    for (auto rel : segments.relations()) {
      addObject(rel.object, cov_shape);
    }
  }
}
 
void EVEVisualization::addCDCTriggerSegmentHit(const std::string& collectionName, const CDCTriggerSegmentHit* hit)
{
  static CDC::CDCGeometryPar& cdcgeo = CDC::CDCGeometryPar::Instance();
  TEveStraightLineSet* shape = new TEveStraightLineSet();
 
  // get center wire
  unsigned iL = WireID(hit->getID()).getICLayer();
  if (hit->getPriorityPosition() < 3) iL -= 1;
  unsigned nWires = cdcgeo.nWiresInLayer(iL);
  unsigned iCenter = hit->getIWire();
  if (hit->getPriorityPosition() == 1) iCenter += 1;
 
  // a track segment consists of 11 wires (15 in SL0) in a special configuration
  // -> get the shift with respect to the center wire (*) for all wires
  // SL 1-8:
  //  _ _ _
  // |_|_|_|
  //  |_|_|
  //   |*|
  //  |_|_|
  // |_|_|_|
  std::vector<int> layershift = { -2, -1, 0, 1, 2};
  std::vector<std::vector<float>> cellshift = {
    { -1, 0, 1},
    { -0.5, 0.5},
    { 0},
    { -0.5, 0.5},
    { -1, 0, 1}
  };
  // SL 0:
  //  _ _ _ _ _
  // |_|_|_|_|_|
  //  |_|_|_|_|
  //   |_|_|_|
  //    |_|_|
  //     |*|
  if (hit->getISuperLayer() == 0) {
    layershift = { 0, 1, 2, 3, 4};
    cellshift = {
      { 0},
      { -0.5, 0.5},
      { -1, 0, 1},
      { -1.5, -0.5, 0.5, 1.5},
      { -2, -1, 0, 1, 2}
    };
  }
 
  // draw all cells in segment
  for (unsigned il = 0; il < layershift.size(); ++il) {
    for (unsigned ic = 0; ic < cellshift[il].size(); ++ic) {
      ROOT::Math::XYZVector corners[2][2];
      for (unsigned ir = 0; ir < 2; ++ir) {
        double r = cdcgeo.fieldWireR(iL + layershift[il] - ir);
        double fz = cdcgeo.fieldWireFZ(iL + layershift[il] - ir);
        double bz = cdcgeo.fieldWireBZ(iL + layershift[il] - ir);
        for (unsigned iphi = 0; iphi < 2; ++iphi) {
          double phib = (iCenter + cellshift[il][ic] + iphi - 0.5) * 2 * M_PI / nWires;
          double phif = phib + cdcgeo.nShifts(iL + layershift[il]) * M_PI / nWires;
 
          ROOT::Math::XYZVector pos_f = ROOT::Math::XYZVector(cos(phif) * r, sin(phif) * r, fz);
          ROOT::Math::XYZVector pos_b = ROOT::Math::XYZVector(cos(phib) * r, sin(phib) * r, bz);
          ROOT::Math::XYZVector zaxis = pos_b - pos_f;
          corners[ir][iphi] = pos_f - zaxis * (pos_f.Z() / zaxis.Z());
        }
      }
 
      shape->AddLine(corners[0][0].X(), corners[0][0].Y(), 0,
                     corners[0][1].X(), corners[0][1].Y(), 0);
      shape->AddLine(corners[0][1].X(), corners[0][1].Y(), 0,
                     corners[1][1].X(), corners[1][1].Y(), 0);
      shape->AddLine(corners[1][1].X(), corners[1][1].Y(), 0,
                     corners[1][0].X(), corners[1][0].Y(), 0);
      shape->AddLine(corners[1][0].X(), corners[1][0].Y(), 0,
                     corners[0][0].X(), corners[0][0].Y(), 0);
    }
  }
 
  if (hit->getISuperLayer() % 2 == 0) {
    shape->SetMainColor(kCyan + 3);
  } else {
    shape->SetMainColor(kPink + 6);
  }
 
  shape->SetName(ObjectInfo::getIdentifier(hit));
  shape->SetTitle(ObjectInfo::getTitle(hit) +
                  TString::Format("\nPriority: %d\nLeft/Right: %d",
                                  hit->getPriorityPosition(), hit->getLeftRight()));
  addToGroup(collectionName, shape);
  addObject(hit, shape);
}
 
void EVEVisualization::addARICHHit(const ARICHHit* hit)
{
  DBObjPtr<ARICHGeometryConfig> arichGeo;
 
  int hitModule = hit->getModule();
  float fi = arichGeo->getDetectorPlane().getSlotPhi(hitModule);
 
  ROOT::Math::XYZVector  centerPos3D =  hit->getPosition();
 
  ROOT::Math::RotationZ rotZ(fi);
  ROOT::Math::XYZVector channelX(1, 0, 0);
  ROOT::Math::XYZVector channelY(0, 1, 0);
  channelX = rotZ * channelX;
  channelY = rotZ * channelY;
 
  auto* arichbox = boxCreator(centerPos3D,
                              arichGeo->getMasterVolume().momentumToGlobal(channelX),
                              arichGeo->getMasterVolume().momentumToGlobal(channelY),
                              0.49, 0.49, 0.05);
  arichbox->SetMainColor(kOrange + 10);
  arichbox->SetName((std::to_string(hitModule)).c_str());
 
  addToGroup("ARICHHits", arichbox);
  addObject(hit, arichbox);
}
 
void EVEVisualization::addTOPDigits(const StoreArray<TOPDigit>& digits)
{
  /* TOP module ID -> #digits */
  std::map<int, int> m_topSummary;
  for (const TOPDigit& hit : digits) {
    int mod = hit.getModuleID();
    ++m_topSummary[mod];
  }
  int maxcount = 0;
  for (auto modCountPair : m_topSummary) {
    if (modCountPair.second > maxcount)
      maxcount = modCountPair.second;
  }
  for (auto modCountPair : m_topSummary) {
    const auto& topmod = TOP::TOPGeometryPar::Instance()->getGeometry()->getModule(modCountPair.first);
    double phi = topmod.getPhi();
    double r_center = topmod.getRadius();
    double z = topmod.getZc();
 
    ROOT::Math::XYZVector centerPos3D;
    VectorUtil::setMagThetaPhi(centerPos3D, r_center, M_PI / 2, phi);
    centerPos3D.SetZ(z);
 
    B2Vector3D channelX(1, 0, 0);     channelX.RotateZ(phi);
    B2Vector3D channelY(0, 1, 0);     channelY.RotateZ(phi);
 
    //bar is a bit thicker so we can mouse over without getting the geometry
    auto* moduleBox = boxCreator(centerPos3D, channelX, channelY,
                                 3.0 * topmod.getBarThickness(), topmod.getBarWidth(), topmod.getBarLength());
    moduleBox->SetMainColor(kAzure + 10);
    double weight = double(modCountPair.second) / maxcount;
    moduleBox->SetMainTransparency(90 - weight * 50);
    moduleBox->SetName(("TOP module " + std::to_string(modCountPair.first)).c_str());
    moduleBox->SetTitle(TString::Format("#TOPDigits: %d ", modCountPair.second));
 
    addToGroup("TOP Modules", moduleBox);
    //associate all TOPDigits with this module.
    for (const TOPDigit& hit : digits) {
      if (modCountPair.first == hit.getModuleID())
        addObject(&hit, moduleBox);
    }
  }
}
 
 
void EVEVisualization::showUserData(const DisplayData& displayData)
{
  for (const auto& labelPair : displayData.m_labels) {
    TEveText* text = new TEveText(labelPair.first.c_str());
    text->SetName(labelPair.first.c_str());
    text->SetTitle(labelPair.first.c_str());
    text->SetMainColor(kGray + 1);
    const ROOT::Math::XYZVector& p = labelPair.second;
    text->PtrMainTrans()->SetPos(p.X(), p.Y(), p.Z());
    addToGroup("DisplayData", text);
  }
 
  for (const auto& pointPair : displayData.m_pointSets) {
    TEvePointSet* points = new TEvePointSet(pointPair.first.c_str());
    points->SetTitle(pointPair.first.c_str());
    points->SetMarkerStyle(7);
    points->SetMainColor(kGreen);
    for (const auto& p : pointPair.second) {
      points->SetNextPoint(p.X(), p.Y(), p.Z());
    }
    addToGroup("DisplayData", points);
  }
 
  int randomColor = 2; //primary colours, changing rapidly with index
  for (const auto& arrow : displayData.m_arrows) {
    const ROOT::Math::XYZVector pos = arrow.start;
    const ROOT::Math::XYZVector dir = arrow.end - pos;
    TEveArrow* eveArrow = new TEveArrow(dir.X(), dir.Y(), dir.Z(), pos.X(), pos.Y(), pos.Z());
    eveArrow->SetName(arrow.name.c_str());
    eveArrow->SetTitle(arrow.name.c_str());
    int arrowColor = arrow.color;
    if (arrowColor == -1) {
      arrowColor = randomColor;
      randomColor++;
    }
    eveArrow->SetMainColor(arrowColor);
 
    //add label
    TEveText* text = new TEveText(arrow.name.c_str());
    text->SetMainColor(arrowColor);
    //place label in middle of arrow, with some slight offset
    // orthogonal direction is arbitrary, set smallest component zero
    ROOT::Math::XYZVector orthogonalDir;
    if (std::abs(dir.X()) < std::abs(dir.Y())) {
      if (std::abs(dir.X()) < std::abs(dir.Z())) {
        orthogonalDir.SetCoordinates(0, dir.Z(), -dir.Y());
      } else {
        orthogonalDir.SetCoordinates(dir.Y(), -dir.X(), 0);
      }
    } else {
      if (std::abs(dir.Y()) < std::abs(dir.Z())) {
        orthogonalDir.SetCoordinates(-dir.Z(), 0, dir.X());
      } else {
        orthogonalDir.SetCoordinates(dir.Y(), -dir.X(), 0);
      }
    }
    const ROOT::Math::XYZVector& labelPos = pos + 0.5 * dir + 0.1 * orthogonalDir;
    text->PtrMainTrans()->SetPos(labelPos.X(), labelPos.Y(), labelPos.Z());
    eveArrow->AddElement(text);
    addToGroup("DisplayData", eveArrow);
  }
 
}
 
void EVEVisualization::addObject(const TObject* dataStoreObject, TEveElement* visualRepresentation)
{
  VisualRepMap::getInstance()->add(dataStoreObject, visualRepresentation);
}
 
void EVEVisualization::addToGroup(const std::string& name, TEveElement* elem)
{
  //slashes at beginning and end are ignored
  const std::string& groupName = boost::algorithm::trim_copy_if(name, boost::algorithm::is_any_of("/"));
 
  TEveElementList* group = m_groups[groupName].group;
  if (!group) {
    group = new TEveElementList(groupName.c_str(), groupName.c_str());
    group->SetRnrState(m_groups[groupName].visible);
    m_groups[groupName].group = group;
 
    //if groupName contains '/', remove last bit and add to parent group
    //e.g. if groupName=A/B/C, call addToGroup("A/B", groupC)
    auto lastSlash = boost::algorithm::find_last(groupName, "/");
    if (lastSlash) {
      const std::string parentGroup(groupName.begin(), lastSlash.begin());
      const std::string thisGroup(lastSlash.end(), groupName.end());
      group->SetElementName(thisGroup.c_str());
      addToGroup(parentGroup, group);
    } else {
      gEve->AddElement(group);
    }
  }
  group->AddElement(elem);
}