FlashHypothesisCreator.cxx

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/*!
 * Title:   FlashHypothesis Creator Class
 * Author:  Wes Ketchum (wketchum@lanl.gov)
 *
 * Description: Class that produces a flash hypothesis for a trajectory.
 * Input:       Trajectory (std::vector<TVector3> objects)
 * Output:      FlashHypotheses
*/

#include "FlashHypothesisCreator.h"

opdet::FlashHypothesisCollection
opdet::FlashHypothesisCreator::GetFlashHypothesisCollection(recob::Track const& track,
                                                            std::vector<float> const& dEdxVector,
                                                            Providers_t providers,
                                                            phot::PhotonVisibilityService const& pvs,
                                                            opdet::OpDigiProperties const& opdigip,
                                                            float XOffset)
{
  bool interpolate_dEdx=false;
  if(track.NumberTrajectoryPoints() == dEdxVector.size())
    interpolate_dEdx=true;
  else if(track.NumberTrajectoryPoints() == dEdxVector.size()+1)
    interpolate_dEdx=false;
  else
    throw "ERROR in FlashHypothesisCreator: dEdx vector size not compatible with track size.";

  auto const* geom = providers.get<geo::GeometryCore>();
  FlashHypothesisCollection fhc(geom->NOpDets());
  for(size_t pt=1; pt<track.NumberTrajectoryPoints(); pt++){
    if(interpolate_dEdx)
      fhc = fhc + CreateFlashHypothesesFromSegment(track.LocationAtPoint<TVector3>(pt-1),
                                                   track.LocationAtPoint<TVector3>(pt),
                                                   0.5*(dEdxVector[pt]+dEdxVector[pt-1]),
                                                   providers,pvs,opdigip,XOffset);
    else
      fhc = fhc + CreateFlashHypothesesFromSegment(track.LocationAtPoint<TVector3>(pt-1),
                                                   track.LocationAtPoint<TVector3>(pt),
                                                   dEdxVector[pt-1],
                                                   providers,pvs,opdigip,XOffset);
  }
  return fhc;
}

opdet::FlashHypothesisCollection
opdet::FlashHypothesisCreator::GetFlashHypothesisCollection(sim::MCTrack const& mctrack,
                                                            std::vector<float> const& dEdxVector,
                                                            Providers_t providers,
                                                            phot::PhotonVisibilityService const& pvs,
                                                            opdet::OpDigiProperties const& opdigip,
                                                            float XOffset)
{
  bool interpolate_dEdx=false;
  if(mctrack.size() == dEdxVector.size())
    interpolate_dEdx=true;
  else if(mctrack.size() == dEdxVector.size()+1)
    interpolate_dEdx=false;
  else
    throw "ERROR in FlashHypothesisCreator: dEdx vector size not compatible with mctrack size.";

  auto const* geom = providers.get<geo::GeometryCore>();
  FlashHypothesisCollection fhc(geom->NOpDets());
  for(size_t pt=1; pt<mctrack.size(); pt++){
    if(interpolate_dEdx)
      fhc = fhc + CreateFlashHypothesesFromSegment(mctrack[pt-1].Position().Vect(),
                                                   mctrack[pt].Position().Vect(),
                                                   0.5*(dEdxVector[pt]+dEdxVector[pt-1]),
                                                   providers,pvs,opdigip,XOffset);
    else
      fhc = fhc + CreateFlashHypothesesFromSegment(mctrack[pt-1].Position().Vect(),
                                                   mctrack[pt].Position().Vect(),
                                                   dEdxVector[pt-1],
                                                   providers,pvs,opdigip,XOffset);
  }
  return fhc;
}

opdet::FlashHypothesisCollection
opdet::FlashHypothesisCreator::GetFlashHypothesisCollection(std::vector<TVector3> const& trajVector,
                                                            std::vector<float> const& dEdxVector,
                                                            Providers_t providers,
                                                            phot::PhotonVisibilityService const& pvs,
                                                            opdet::OpDigiProperties const& opdigip,
                                                            float XOffset)
{
  bool interpolate_dEdx=false;
  if(trajVector.size() == dEdxVector.size())
    interpolate_dEdx=true;
  else if(trajVector.size() == dEdxVector.size()+1)
    interpolate_dEdx=false;
  else
    throw "ERROR in FlashHypothesisCreator: dEdx vector size not compatible with trajVector size.";

  auto const* geom = providers.get<geo::GeometryCore>();
  FlashHypothesisCollection fhc(geom->NOpDets());
  for(size_t pt=1; pt<trajVector.size(); pt++){
    if(interpolate_dEdx)
      fhc = fhc + CreateFlashHypothesesFromSegment(trajVector[pt-1],
                                                   trajVector[pt],
                                                   0.5*(dEdxVector[pt]+dEdxVector[pt-1]),
                                                   providers,pvs,opdigip,XOffset);
    else
      fhc = fhc + CreateFlashHypothesesFromSegment(trajVector[pt-1],
                                                   trajVector[pt],
                                                   dEdxVector[pt-1],
                                                   providers,pvs,opdigip,XOffset);
  }
  return fhc;
}

opdet::FlashHypothesisCollection
opdet::FlashHypothesisCreator::GetFlashHypothesisCollection(TVector3 const& pt1, TVector3 const& pt2,
                                                            float const& dEdx,
                                                            Providers_t providers,
                                                            phot::PhotonVisibilityService const& pvs,
                                                            opdet::OpDigiProperties const& opdigip,
                                                            float XOffset)
{
  return CreateFlashHypothesesFromSegment(pt1,pt2,dEdx,providers,pvs,opdigip,XOffset);
}

opdet::FlashHypothesisCollection
opdet::FlashHypothesisCreator::CreateFlashHypothesesFromSegment(TVector3 const& pt1, TVector3 const& pt2,
                                                            float const& dEdx,
                                                            Providers_t providers,
                                                            phot::PhotonVisibilityService const& pvs,
                                                            opdet::OpDigiProperties const& opdigip,
                                                            float XOffset)
{
  auto const* geom = providers.get<geo::GeometryCore>();
  auto const* larp = providers.get<detinfo::LArProperties>();
  auto const nOpDets = geom->NOpDets();
  FlashHypothesisCollection fhc(nOpDets);

  FlashHypothesis prompt_hyp = FlashHypothesis(nOpDets);

  std::vector<double> xyz_segment(_calc.SegmentMidpoint(pt1,pt2,XOffset));

  //get the visibility vector
  auto const& PointVisibility = pvs.GetAllVisibilities(&xyz_segment[0]);

  //check visibility pointer, as it may be null if given a y/z outside some range
  if (!PointVisibility) return fhc;

  //klugey ... right now, set a qe_vector that gives constant qe across all opdets
  std::vector<float> qe_vector(nOpDets,opdigip.QE());
  _calc.FillFlashHypothesis(larp->ScintYield()*larp->ScintYieldRatio(),
                            dEdx,
                            pt1,pt2,
                            qe_vector,
                            PointVisibility,
                            prompt_hyp);

  fhc.SetPromptHypAndPromptFraction(prompt_hyp,larp->ScintYieldRatio());
  return fhc;
}