ShowerRecoAlg.cxx

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#include "ShowerRecoAlg.h"
#include "lardata/Utilities/GeometryUtilities.h"

#include "larcoreobj/SimpleTypesAndConstants/PhysicalConstants.h"
#include "lardata/Utilities/GeometryUtilities.h"
#include "lardata/Utilities/PxUtils.h"
#include "larreco/Calorimetry/CalorimetryAlg.h"
#include "larreco/ShowerFinder/ShowerReco3D/ShowerCalo.h"
#include "larreco/ShowerFinder/ShowerReco3D/ShowerRecoAlgBase.h"

#include "TMath.h"
#include "TVector3.h"

namespace showerreco {

  recob::Shower ShowerRecoAlg::RecoOneShower(
    geo::GeometryCore const& geom,
    detinfo::DetectorClocksData const& clockData,
    detinfo::DetectorPropertiesData const& detProp,
    std::vector<showerreco::ShowerCluster_t> const& clusters)
  {
    recob::Shower result;
    //
    // Reconstruct and store
    //
    std::vector<util::PxPoint> fStartPoint; // for each plane
    std::vector<util::PxPoint> fEndPoint;   // for each plane
    std::vector<double> fOmega2D;           // for each plane

    util::GeometryUtilities const gser{geom, clockData, detProp};
    std::vector<double> fEnergy(gser.Nplanes(), -1);    // for each plane
    std::vector<double> fMIPEnergy(gser.Nplanes(), -1); // for each plane
    std::vector<double> fdEdx(gser.Nplanes(), -1);
    std::vector<unsigned char> fPlaneID;

    // First Get Start Points
    for (auto const& cl : clusters) {
      fStartPoint.push_back(cl.start_point); // for each plane
      fEndPoint.push_back(cl.end_point);     // for each plane
      fOmega2D.push_back(cl.angle_2d);
      fPlaneID.push_back(cl.plane_id);
      if (fVerbosity) {
        std::cout << " planes : " << cl.plane_id << " " << cl.start_point.t << " "
                  << cl.start_point.w << " " << cl.end_point.t << " " << cl.end_point.w
                  << " angle2d " << cl.angle_2d << std::endl;
      }
    }

    //decide best two planes. for now, using length in wires - flatter is better.
    int index_to_use[2] = {0, 1};
    int best_plane = -1;
    double best_length = 0;
    double good_length = 0;
    for (size_t ip = 0; ip < fPlaneID.size(); ip++) {
      double dist = fabs(fEndPoint[ip].w - fStartPoint[ip].w);
      if (dist > best_length) {
        good_length = best_length;
        index_to_use[1] = index_to_use[0];

        best_length = dist;
        best_plane = fPlaneID.at(ip);
        index_to_use[0] = ip;
      }
      else if (dist > good_length) {
        good_length = dist;
        index_to_use[1] = ip;
      }
    }

    // Second Calculate 3D angle and effective pitch and start point
    double xphi = 0, xtheta = 0;

    gser.Get3DaxisN(fPlaneID[index_to_use[0]],
                    fPlaneID[index_to_use[1]],
                    fOmega2D[index_to_use[0]] * TMath::Pi() / 180.,
                    fOmega2D[index_to_use[1]] * TMath::Pi() / 180.,
                    xphi,
                    xtheta);

    if (fVerbosity) std::cout << " new angles: " << xphi << " " << xtheta << std::endl;

    double xyz[3];
    // calculate start point here?
    gser.GetXYZ(&fStartPoint[index_to_use[0]], &fStartPoint[index_to_use[1]], xyz);

    if (fVerbosity) std::cout << " XYZ:  " << xyz[0] << " " << xyz[1] << " " << xyz[2] << std::endl;

    // Third calculate dE/dx and total energy for all planes, because why not?
    for (size_t cl_index = 0; cl_index < fPlaneID.size(); ++cl_index) {
      int plane = fPlaneID.at(cl_index);
      double newpitch = gser.PitchInView(plane, xphi, xtheta);
      if (plane == best_plane) best_length *= newpitch / gser.WireToCm();

      if (fVerbosity) std::cout << std::endl << " Plane: " << plane << std::endl;

      double totEnergy = 0;
      double totLowEnergy = 0;
      double totHighEnergy = 0;
      double totMIPEnergy = 0;
      int direction = -1;
      double dEdx_av = 0, dedx_final = 0;
      int npoints_first = 0, npoints_sec = 0;

      //override direction if phi (XZ angle) is less than 90 degrees
      // this is shady, and needs to be rethought.
      if (fabs(fOmega2D.at(cl_index)) < 90) direction = 1;

      auto const& hitlist = clusters.at(cl_index).hit_vector;
      std::vector<util::PxHit> local_hitlist;
      local_hitlist.reserve(hitlist.size());

      for (const auto& theHit : hitlist) {
        double dEdx_new = 0;
        double hitElectrons = 0;
        if (!fUseArea) {
          dEdx_new = fCaloAlg->dEdx_AMP(
            clockData, detProp, theHit.peak / newpitch, theHit.t / gser.TimeToCm(), theHit.plane);
          hitElectrons = fCaloAlg->ElectronsFromADCPeak(theHit.peak, plane);
        }
        else {
          dEdx_new = fCaloAlg->dEdx_AREA(
            clockData, detProp, theHit.charge / newpitch, theHit.t / gser.TimeToCm(), theHit.plane);
          hitElectrons = fCaloAlg->ElectronsFromADCArea(theHit.charge, plane);
        }

        hitElectrons *=
          fCaloAlg->LifetimeCorrection(clockData, detProp, theHit.t / gser.TimeToCm());

        totEnergy += hitElectrons * 1.e3 / (::util::kGeVToElectrons);

        int multiplier = 1;
        if (plane < 2) multiplier = 2;
        if (!fUseArea) { totMIPEnergy += theHit.peak * 0.0061 * multiplier; }
        else {
          totMIPEnergy += theHit.charge * 0.00336 * multiplier;
        }

        if (fVerbosity && dEdx_new > 1.9 && dEdx_new < 2.1)
          std::cout << "dEdx_new " << dEdx_new << " " << dEdx_new / theHit.charge * newpitch << " "
                    << theHit.charge * 0.0033 * multiplier / newpitch << std::endl;

        util::PxPoint OnlinePoint;
        // calculate the wire,time coordinates of the hit projection on to the 2D shower axis
        gser.GetPointOnLine(
          fOmega2D.at(cl_index), &(fStartPoint.at(cl_index)), &theHit, OnlinePoint);

        double ortdist = gser.Get2DDistance(&OnlinePoint, &theHit);
        double linedist = gser.Get2DDistance(&OnlinePoint, &(fStartPoint.at(cl_index)));

        //calculate the distance from the vertex using the effective pitch metric
        double wdist = ((theHit.w - fStartPoint.at(cl_index).w) * newpitch) *
                       direction; //wdist is always positive

        if (fVerbosity && dEdx_new < 3.5)
          std::cout << " CALORIMETRY:"
                    << " Pitch " << newpitch << " dist: " << wdist << " dE/dx: " << dEdx_new
                    << "MeV/cm "
                    << " average: " << totEnergy << "hit: wire, time " << theHit.w / gser.WireToCm()
                    << " " << theHit.t / gser.TimeToCm() << "total energy" << totEnergy
                    << std::endl;

        if ((wdist < fcalodEdxlength) && (wdist > 0.2)) {

          // first pass at average dE/dx
          if (wdist < fdEdxlength
              //take no hits before vertex (depending on direction)
              && ((direction == 1 && theHit.w > fStartPoint.at(cl_index).w) ||
                  (direction == -1 && theHit.w < fStartPoint.at(cl_index).w)) &&
              ortdist < 3.5 && linedist < fdEdxlength) {

            dEdx_av += dEdx_new;
            local_hitlist.push_back(theHit);

            npoints_first++;
            if (fVerbosity)
              std::cout << " CALORIMETRY:"
                        << " Pitch " << newpitch << " dist: " << wdist << " dE/dx: " << dEdx_new
                        << "MeV/cm "
                        << " average: " << dEdx_av / npoints_first << " hit: wire, time "
                        << theHit.w << " " << theHit.t << " line,ort " << linedist << " " << ortdist
                        << " direction " << direction << std::endl;
          }

        } //end inside range if statement

      } // end first loop on hits.

      double mevav2cm = 0;
      double fRMS_corr = 0;

      //calculate average dE/dx
      if (npoints_first > 0) { mevav2cm = dEdx_av / npoints_first; }

      //loop only on subset of hits
      for (auto const& theHit : local_hitlist) {
        double dEdx = 0;
        if (fUseArea) {
          dEdx = fCaloAlg->dEdx_AREA(
            clockData, detProp, theHit.charge / newpitch, theHit.t / gser.TimeToCm(), theHit.plane);
        }
        else //this will hopefully go away, once all of the calibration factors are calculated.
        {
          dEdx = fCaloAlg->dEdx_AMP(
            clockData, detProp, theHit.peak / newpitch, theHit.t / gser.TimeToCm(), theHit.plane);
        }

        fRMS_corr += (dEdx - mevav2cm) * (dEdx - mevav2cm);
      }

      if (npoints_first > 0) { fRMS_corr = std::sqrt(fRMS_corr / npoints_first); }

      //loop only on subset of hits

      for (auto const& theHit : local_hitlist) {
        double dEdx = 0;
        if (fUseArea) {
          dEdx = fCaloAlg->dEdx_AREA(
            clockData, detProp, theHit.charge / newpitch, theHit.t / gser.TimeToCm(), theHit.plane);
        }
        else //this will hopefully go away, once all of the calibration factors are calculated.
        {
          dEdx = fCaloAlg->dEdx_AMP(
            clockData, detProp, theHit.peak / newpitch, theHit.t / gser.TimeToCm(), theHit.plane);
        }

        if (((dEdx > (mevav2cm - fRMS_corr)) && (dEdx < (mevav2cm + fRMS_corr))) ||
            (newpitch > 0.3 * fdEdxlength)) {
          dedx_final += dEdx;
          npoints_sec++;
        }
      }

      if (npoints_sec > 0) { dedx_final /= npoints_sec; }

      if (fVerbosity) {
        std::cout << " total ENERGY, birks: " << totEnergy << " MeV "
                  << " |average:  " << dedx_final << std::endl
                  << " Energy:  lo:" << totLowEnergy << " hi: " << totHighEnergy
                  << " MIP corrected " << totMIPEnergy << std::endl;
      }
      // if Energy correction factor to be used
      // then get it from ShowerCalo.h
      if (_Ecorrection) { totEnergy *= showerreco::energy::DEFAULT_ECorr; }
      fEnergy[plane] = totEnergy; // for each plane
      fMIPEnergy[plane] = totMIPEnergy;
      fdEdx[plane] = dedx_final;

      // break;
    } // end loop on clusters

    result.set_total_MIPenergy(fMIPEnergy);
    result.set_total_best_plane(best_plane);
    result.set_length(best_length);
    result.set_total_energy(fEnergy);

    double dirs[3] = {0};
    gser.GetDirectionCosines(xphi, xtheta, dirs);
    TVector3 vdirs(dirs[0], dirs[1], dirs[2]);

    TVector3 vxyz(xyz[0], xyz[1], xyz[2]);

    result.set_direction(vdirs);
    result.set_start_point(vxyz);
    result.set_dedx(fdEdx);

    // done
    return result;
  }

}