CCTrackMaker_module.cc

Go to the documentation of this file.

//
//  CCTrackMaker
//
//  Make tracks using ClusterCrawler clusters and vertex info
//
//  baller@fnal.gov, October 2014
//  May 2015: Major re-write
//

// C++ includes
#include <cmath>
#include <algorithm>
#include <iostream>
#include <iomanip>
#include <fstream>
#include <vector>
#include <string>

// Framework includes
#include "art/Framework/Core/EDProducer.h"
#include "art/Framework/Core/ModuleMacros.h"
#include "art/Framework/Principal/Event.h"
#include "fhiclcpp/ParameterSet.h"
#include "art/Framework/Principal/Handle.h"
#include "canvas/Persistency/Common/Ptr.h"
#include "canvas/Persistency/Common/PtrVector.h"
#include "art/Framework/Services/Registry/ServiceHandle.h"
#include "messagefacility/MessageLogger/MessageLogger.h"

// LArSoft includes
#include "larcore/Geometry/Geometry.h"
#include "larcorealg/Geometry/TPCGeo.h"
#include "larcorealg/Geometry/PlaneGeo.h"
#include "larcorealg/Geometry/WireGeo.h"
#include "lardataobj/RecoBase/Hit.h"
#include "lardataobj/RecoBase/Cluster.h"
#include "lardataobj/RecoBase/Track.h"
#include "lardataobj/RecoBase/Vertex.h"
#include "lardataobj/RecoBase/PFParticle.h"
#include "lardataobj/RecoBase/Seed.h"
#include "larevt/CalibrationDBI/Interface/ChannelStatusService.h"
#include "larevt/CalibrationDBI/Interface/ChannelStatusProvider.h"

#include "lardata/DetectorInfoServices/DetectorPropertiesService.h"
#include "lardata/Utilities/AssociationUtil.h"
#include "larreco/RecoAlg/TrackTrajectoryAlg.h"
#include "larreco/RecoAlg/VertexFitAlg.h"


struct CluLen{
  int index;
  int length;
};

bool greaterThan (CluLen c1, CluLen c2) { return (c1.length > c2.length);}
bool lessThan (CluLen c1, CluLen c2) { return (c1.length < c2.length);}

namespace trkf {
  
  class CCTrackMaker : public art::EDProducer {
    
  public:
    
    explicit CCTrackMaker(fhicl::ParameterSet const& pset);
    virtual ~CCTrackMaker();
    
    void reconfigure(fhicl::ParameterSet const& p);
    void produce(art::Event& evt);
    void beginJob();
    //    void endJob();
    
  private:
    
    std::string     fHitModuleLabel;
    std::string     fClusterModuleLabel;
    std::string     fVertexModuleLabel;
    
    // services
    art::ServiceHandle<geo::Geometry> geom;
    const detinfo::DetectorProperties* detprop;
    
    TrackTrajectoryAlg fTrackTrajectoryAlg;
    VertexFitAlg fVertexFitAlg;
    
    // Track matching parameters
    unsigned short algIndex;
    std::vector<short> fMatchAlgs;
    std::vector<float> fXMatchErr;
    std::vector<float> fAngleMatchErr;
    std::vector<float> fChgAsymFactor;
    std::vector<float> fMatchMinLen;
    std::vector<bool> fMakeAlgTracks;
    
    // Cluster merging parameters
    float fMaxDAng;
    float fChainMaxdX;
    float fChainVtxAng;
    float fMergeChgAsym;
    float fMaxMergeError;
    float fMergeErrorCut;
    
    float fChgWindow;
    float fWirePitch;
    // cosmic ray tagging
    float fFiducialCut;
    float fDeltaRayCut;
    
    bool fMakePFPs;
    
    // vertex fitting
    unsigned short fNVtxTrkHitsFit;
    float fHitFitErrFac;
    
    // temp
    bool fuBCode;
    
    // debugging inputs
    short fDebugAlg;
    short fDebugPlane;
    short fDebugCluster;
    bool fPrintAllClusters;
    bool prt;
    
    unsigned short nplanes;
    unsigned int cstat;
    unsigned int tpc;
    
    // hit indexing info
    std::array<unsigned int, 3> firstWire;
    std::array<unsigned int, 3> lastWire;
    std::array<unsigned int, 3> firstHit;
    std::array<unsigned int, 3> lastHit;
    std::array<std::vector< std::pair<int, int> >, 3> WireHitRange;
    
    std::vector<art::Ptr<recob::Hit>> allhits;
    
    // Cluster parameters
    struct clPar{
      std::array<float, 2> Wire;      // Begin/End Wire
      std::array<float, 2> X;         // Begin/End X
      std::array<short, 2> Time;      // Begin/End Time
      std::array<float, 2> Slope;     // Begin/End slope
      std::array<float, 2> Charge;    // Begin/End charge
      std::array<float, 2> ChgNear;   // Charge near the cluster at each end
      std::array<float, 2> Angle;     // Begin/End angle (radians)
      std::array<short, 2> Dir;       // Product of end * slope
      std::array<short, 2> VtxIndex;  // Vertex index
      std::array<short, 2> mVtxIndex; // "Maybe" Vertex index
      std::array<short, 2> BrkIndex;  // Broken cluster index
      std::array<float, 2> MergeError;  // Broken cluster merge error (See MakeClusterChains)
      unsigned short EvtIndex;        // index of the cluster in clusterlist
      short InTrack;                  // cluster -> chain index
      unsigned short Length;          // cluster length (wires)
      float TotChg;                   // total charge of cluster (or series of clusters)
    };
    // vector of cluster parameters in each plane
    std::array<std::vector<clPar>, 3> cls;
    
    // cluster chain parameters
    struct ClsChainPar{
      std::array<float, 2> Wire;      // Begin/End Wire
      std::array<float, 2> X;         // Begin/End X
      std::array<float, 2> Time;      // Begin/End Time
      std::array<float, 2> Slope;     // Begin/End slope
      std::array<float, 2> Angle;     // Begin/End angle (radians)
      std::array<short, 2> VtxIndex;  // Vertex index
      std::array<short, 2> Dir;
      std::array<float, 2> ChgNear;   // Charge near the cluster at each end
      std::array<short, 2> mBrkIndex; // a "Maybe" cluster index
      unsigned short Length;
      float TotChg;
      std::vector<unsigned short> ClsIndex;
      std::vector<unsigned short> Order;
      short InTrack;                  // cluster -> track ID (-1 if none, 0 if under construction)
    };
    // vector of cluster parameters in each plane
    std::array<std::vector<ClsChainPar>, 3> clsChain;
    
    // 3D Vertex info
    struct vtxPar{
      short ID;
      unsigned short EvtIndex;
      float X;
      float Y;
      float Z;
      std::array<unsigned short, 3> nClusInPln;
      bool Neutrino;
    };
    
    std::vector<vtxPar> vtx;
    
    // cluster indices assigned to one vertex. Filled in VtxMatch
    std::array<std::vector<unsigned short>, 3> vxCls;
    
    struct TrkPar{
      short ID;
      unsigned short Proc; // 1 = VtxMatch, 2 = ...
      std::array< std::vector<art::Ptr<recob::Hit>>, 3> TrkHits;
      std::vector<TVector3> TrjPos;
      std::vector<TVector3> TrjDir;
      std::array<short, 2> VtxIndex;
      std::vector<unsigned short> ClsEvtIndices;
      float Length;
      short ChgOrder;
      short MomID;
      std::array<bool, 2> EndInTPC;
      std::array<bool, 2> GoodEnd;    // set true if there are hits in all planes at the end point
      std::vector<short> DtrID;
      short PDGCode;
    };
    std::vector<TrkPar> trk;
    
    // Array of pointers to hits in each plane for one track
    std::array< std::vector<art::Ptr<recob::Hit>>, 3> trkHits;
    // and for one seed
    std::array< std::vector<art::Ptr<recob::Hit>>, 3> seedHits;
    // relative charge normalization between planes
    std::array< float, 3> ChgNorm;
    
    // Vector of PFParticle -> track IDs. The first element will be
    // track ID = 0 indicating that this is a neutrino PFParticle and
    // there is no associated track
    std::vector<unsigned short> pfpToTrkID;
    
    // characterize the match between clusters in 2 or 3 planes
    struct MatchPars {
      std::array<short, 3> Cls;
      std::array<unsigned short, 3> End;
      std::array<float, 3> Chg;
      short Vtx;
      float dWir;   // wire difference at the matching end
      float dAng;   // angle difference at the matching end
      float dX;     // X difference
      float Err;    // Wire,Angle,Time match error
      short oVtx;
      float odWir;  // wire difference at the other end
      float odAng;  // angle difference at the other end
      float odX;  // time difference at the other end
      float dSP;   // space point difference
      float oErr;   // dAngle dX match error
    };
    // vector of many match combinations
    std::vector<MatchPars> matcomb;
    
    void PrintClusters() const;
    
    void PrintTracks() const;
    
    void MakeClusterChains(art::FindManyP<recob::Hit> const& fmCluHits);
    float dXClTraj(art::FindManyP<recob::Hit> const& fmCluHits, unsigned short ipl, unsigned short icl1, unsigned short end1, unsigned short icl2);
    void FillChgNear();
    void FillWireHitRange();
    
    // Find clusters that point to vertices but do not have a
    // cluster-vertex association made by ClusterCrawler
    void FindMaybeVertices();
    // match clusters associated with vertices
    void VtxMatch(art::FindManyP<recob::Hit> const& fmCluHits);
    // match clusters in all planes
    void PlnMatch(art::FindManyP<recob::Hit> const& fmCluHits);
    // match clusters in all planes
    void AngMatch(art::FindManyP<recob::Hit> const& fmCluHits);
    
    // Make the track/vertex and mother/daughter relationships
    void MakeFamily();
    void TagCosmics();
    
    void FitVertices();
    
    // fill the end matching parameters in the MatchPars struct
    void FillEndMatch(MatchPars& match);
    // 2D version
    void FillEndMatch2(MatchPars& match);
    
    float ChargeAsym(std::array<float, 3>& mChg);
    
    void FindMidPointMatch(art::FindManyP<recob::Hit> const& fmCluHits, MatchPars& match, unsigned short kkpl, unsigned short kkcl, unsigned short kkend, float& kkWir, float& kkX);
    
    bool FindMissingCluster(unsigned short kpl, short& kcl, unsigned short& kend, float kWir, float kX, float okWir, float okX);
    
    bool DupMatch(MatchPars& match);
    
    void SortMatches(art::FindManyP<recob::Hit> const& fmCluHits, unsigned short procCode);
    
    // fill the trkHits array using information.
    void FillTrkHits(art::FindManyP<recob::Hit> const& fmCluHits, unsigned short imat);
    
    // Seed hits for the seed - hit association
//    void FindSeedHits(unsigned short itk, unsigned short& end);
    
    // store the track in the trk vector
    void StoreTrack(art::FindManyP<recob::Hit> const& fmCluHits, unsigned short imat, unsigned short procCode);
    
    // returns the charge along the line between (wire1, time1) and (wire2, time2)
    float ChargeNear(unsigned short ipl, unsigned short wire1, float time1, unsigned short wire2, float time2);
    
    // inflate cuts at large angle
    float AngleFactor(float slope);
    
  }; // class CCTrackMaker
  
  //-------------------------------------------------
  CCTrackMaker::CCTrackMaker(fhicl::ParameterSet const& pset)
  {
    this->reconfigure(pset);
    produces< std::vector<recob::PFParticle>                   >();
    produces< art::Assns<recob::PFParticle, recob::Track>      >();
    produces< art::Assns<recob::PFParticle, recob::Cluster>    >();
    produces< art::Assns<recob::PFParticle, recob::Seed>       >();
    produces< art::Assns<recob::PFParticle, recob::Vertex>     >();
    produces< std::vector<recob::Vertex>                       >();
    produces< std::vector<recob::Track>                        >();
    produces< art::Assns<recob::Track,      recob::Hit>        >();
    produces<std::vector<recob::Seed>                          >();
    //produces< art::Assns<recob::Seed,       recob::Hit>        >();
  }
  
  //-------------------------------------------------
  void CCTrackMaker::reconfigure(fhicl::ParameterSet const& pset)
  {
    fHitModuleLabel         = pset.get< std::string >("HitModuleLabel");
    fClusterModuleLabel     = pset.get< std::string >("ClusterModuleLabel");
    fVertexModuleLabel      = pset.get< std::string >("VertexModuleLabel");
    // track matching
    fMatchAlgs              = pset.get< std::vector<short> >("MatchAlgs");
    fXMatchErr              = pset.get< std::vector<float> >("XMatchErr");
    fAngleMatchErr          = pset.get< std::vector<float> >("AngleMatchErr");
    fChgAsymFactor          = pset.get< std::vector<float> >("ChgAsymFactor");
    fMatchMinLen            = pset.get< std::vector<float> >("MatchMinLen");
    fMakeAlgTracks          = pset.get< std::vector<bool> >("MakeAlgTracks");
    // Cluster merging
    fMaxDAng                = pset.get< float >("MaxDAng");
    fChainMaxdX             = pset.get< float >("ChainMaxdX");
    fChainVtxAng            = pset.get< float >("ChainVtxAng");
    fMergeChgAsym           = pset.get< float >("MergeChgAsym");
    // Cosmic ray tagging
    fFiducialCut            = pset.get< float >("FiducialCut");
    fDeltaRayCut            = pset.get< float >("DeltaRayCut");
    // make PFParticles
    fMakePFPs               = pset.get< bool  >("MakePFPs");
    // vertex fitting
    fNVtxTrkHitsFit         = pset.get< unsigned short  >("NVtxTrkHitsFit");
    fHitFitErrFac           = pset.get< float >("HitFitErrFac");
    // uB code
    fuBCode                 = pset.get< bool >("uBCode");
    // debugging inputs
    fDebugAlg               = pset.get< short >("DebugAlg");
    fDebugPlane             = pset.get< short >("DebugPlane");
    fDebugCluster           = pset.get< short >("DebugCluster");
    fPrintAllClusters       = pset.get< bool  >("PrintAllClusters");
    
    // Consistency check
    if(fMatchAlgs.size() > fXMatchErr.size() || fMatchAlgs.size() > fAngleMatchErr.size()
       || fMatchAlgs.size() > fChgAsymFactor.size() || fMatchAlgs.size() > fMatchMinLen.size()
       || fMatchAlgs.size() > fMakeAlgTracks.size()) {
      mf::LogError("CCTM")<<"Incompatible fcl input vector sizes";
      return;
    }
    // Reality check
    for(unsigned short ii = 0; ii < fMatchAlgs.size(); ++ii) {
      if(fAngleMatchErr[ii] <= 0 || fXMatchErr[ii] <= 0) {
        mf::LogError("CCTM")<<"Invalid matching parameters "<<fAngleMatchErr[ii]<<" "<<fXMatchErr[ii];
        return;
      }
    } // ii
    
  } // reconfigure
  
  //-------------------------------------------------
  CCTrackMaker::~CCTrackMaker()
  {
  }
  
  //-------------------------------------------------
  void CCTrackMaker::beginJob()
  {
  }
  
  /*
   //-------------------------------------------------
   void CCTrackMaker::endJob()
   {
   }
   */
  //------------------------------------------------------------------------------------//
  void CCTrackMaker::produce(art::Event& evt)
  {
    
    detprop = lar::providerFrom<detinfo::DetectorPropertiesService>();

    fWirePitch = geom->WirePitch();
    
    fChgWindow = 40; // window (ticks) for identifying shower-like clusters
    
    std::unique_ptr<std::vector<recob::Track>> tcol(new std::vector<recob::Track>);
    std::unique_ptr<art::Assns<recob::Track, recob::Hit> > thassn (new art::Assns<recob::Track, recob::Hit>);

    std::unique_ptr<std::vector<recob::Vertex>> vcol(new std::vector<recob::Vertex>);

    std::unique_ptr<std::vector<recob::PFParticle>> pcol(new std::vector<recob::PFParticle>);
    
    std::unique_ptr< art::Assns<recob::PFParticle, recob::Track> > ptassn( new art::Assns<recob::PFParticle, recob::Track> );
    std::unique_ptr< art::Assns<recob::PFParticle, recob::Cluster> > pcassn( new art::Assns<recob::PFParticle, recob::Cluster> );
    std::unique_ptr< art::Assns<recob::PFParticle, recob::Seed> > psassn( new art::Assns<recob::PFParticle, recob::Seed> );
    std::unique_ptr< art::Assns<recob::PFParticle, recob::Vertex> > pvassn( new art::Assns<recob::PFParticle, recob::Vertex> );
    
    // seed collection
    std::unique_ptr<std::vector<recob::Seed>> scol(new std::vector<recob::Seed>);
    std::unique_ptr<art::Assns<recob::Seed, recob::Hit> > shassn (new art::Assns<recob::Seed, recob::Hit>);
    
    // all hits
    art::Handle< std::vector<recob::Hit> > allhitsListHandle;
    // cluster list
    art::Handle< std::vector<recob::Cluster> > clusterListHandle;
    std::vector<art::Ptr<recob::Cluster>> clusterlist;
    // ClusterCrawler Vertices
    art::Handle< std::vector<recob::Vertex> > VtxListHandle;
    std::vector<art::Ptr<recob::Vertex>> vtxlist;

    // get Hits
    allhits.clear();
    if (evt.getByLabel(fHitModuleLabel, allhitsListHandle))
      art::fill_ptr_vector(allhits, allhitsListHandle);
    
    // get Clusters
    if (evt.getByLabel(fClusterModuleLabel, clusterListHandle))
      art::fill_ptr_vector(clusterlist, clusterListHandle);
    if(clusterlist.size() == 0) return;
    // get cluster - hit associations
    art::FindManyP<recob::Hit> fmCluHits(clusterListHandle, evt, fClusterModuleLabel);
    //    pfmCluHits.reset(something goes here);
    
    // get Vertices
    if (evt.getByLabel(fVertexModuleLabel, VtxListHandle))
      art::fill_ptr_vector(vtxlist, VtxListHandle);
    art::FindManyP<recob::Cluster, unsigned short> fmVtxCls(VtxListHandle, evt, fVertexModuleLabel);
    
    std::vector<CluLen> clulens;
    
    unsigned short ipl, icl, end, itr, tID, tIndex;
    
    // maximum error (see MakeClusterChains) for considering clusters broken
    fMaxMergeError = 30;
    // Cut on the error for a definitely broken cluster. Clusters with fMergeErrorCut < MergeError < fMaxMergeError
    // are possibly broken clusters but we will consider these when matching between planes
    fMergeErrorCut = 10;
    
    // some junk vectors to satisfy the recob::Track constructor
    std::vector< std::vector<double> > dQdx;
    std::vector<double> mom(2, util::kBogusD);
    // prepare a bogus covariance matrix so that the TrackAna module doesn't bomb
    TMatrixD cov(5,5);
    for(unsigned short ii = 0; ii < 5; ++ii) cov(ii, ii) = 1;
    std::vector<TMatrixD> tmpCov;
    tmpCov.push_back(cov);
    tmpCov.push_back(cov);
    std::vector< art::Ptr<recob::Hit > > tmpHits;
    std::vector< art::Ptr<recob::Cluster > > tmpCls;
    std::vector< art::Ptr<recob::Vertex > > tmpVtx;
    
    // vector for PFParticle constructor
    std::vector<size_t> dtrIndices;
    
    // some vectors for recob::Seed
    double sPos[3], sDir[3];
    double sErr[3] = {0,0,0};
    
    // check consistency between clusters and associated hits
    std::vector<art::Ptr<recob::Hit>> clusterhits;
    for(icl = 0; icl < clusterlist.size(); ++icl) {
      ipl = clusterlist[icl]->Plane().Plane;
      clusterhits = fmCluHits.at(icl);
      if(clusterhits[0]->WireID().Wire != std::nearbyint(clusterlist[icl]->EndWire())) {
        std::cout<<"CCTM Cluster-Hit End wire mis-match "<<clusterhits[0]->WireID().Wire<<" vs "<<std::nearbyint(clusterlist[icl]->EndWire())<<" Bail out! \n";
        return;
      }
      for(unsigned short iht = 0; iht < clusterhits.size(); ++iht) {
        if(clusterhits[iht]->WireID().Plane != ipl) {
          std::cout<<"CCTM Cluster-Hit plane mis-match "<<ipl<<" vs "<<clusterhits[iht]->WireID().Plane<<" on hit "<<iht<<" Bail out! \n";
          return;
        } // hit-cluster plane mis-match
      } // iht
    } // icl
    // end check consistency
    
//    std::cout<<"************ event "<<evt.event()<<"\n";
    
    vtx.clear();
    trk.clear();
    for(cstat = 0; cstat < geom->Ncryostats(); ++cstat) {
      for(tpc = 0; tpc < geom->Cryostat(cstat).NTPC(); ++tpc) {
        nplanes = geom->Cryostat(cstat).TPC(tpc).Nplanes();
        if(nplanes > 3) continue;
        for(ipl = 0; ipl < 3; ++ipl) {
          cls[ipl].clear();
          clsChain[ipl].clear();
          trkHits[ipl].clear();
        } // ipl
        // FillWireHitRange also calculates the charge in each plane
        FillWireHitRange();
        for(ipl = 0; ipl < nplanes; ++ipl) {
          clulens.clear();
          // sort clusters by increasing End wire number
          for(icl = 0; icl < clusterlist.size(); ++icl) {
            if(clusterlist[icl]->Plane().Cryostat != cstat) continue;
            if(clusterlist[icl]->Plane().TPC != tpc) continue;
            if(clusterlist[icl]->Plane().Plane != ipl) continue;
            CluLen clulen;
            clulen.index = icl;
            clulen.length = clusterlist[icl]->EndWire();
            clulens.push_back(clulen);
          }
          if(clulens.size() == 0) continue;
          // sort clusters
          std::sort (clulens.begin(),clulens.end(), lessThan);
          if(clulens.size() == 0) continue;
          for(unsigned short ii = 0; ii < clulens.size(); ++ii) {
            const unsigned short icl = clulens[ii].index;
            clPar clstr;
            clstr.EvtIndex = icl;
            recob::Cluster const& cluster = *(clusterlist[icl]);
            // Begin info -> end index 1 (DS)
            clstr.Wire[1] = cluster.StartWire();
            clstr.Time[1] = cluster.StartTick();
            clstr.X[1] = (float)detprop->ConvertTicksToX(cluster.StartTick(), ipl, tpc, cstat);
            clstr.Angle[1] = cluster.StartAngle();
            clstr.Slope[1] = std::tan(cluster.StartAngle());
            clstr.Dir[1] = 0;
//            if(fabs(clstr.Slope[1]) > 0.02) clstr.Dir[1] = -1 * (2*(clstr.Slope[1]>0)-1);
            clstr.Charge[1] = ChgNorm[ipl] * cluster.StartCharge();
            // this will be filled later
            clstr.ChgNear[1] = 0;
            clstr.VtxIndex[1] = -1;
            clstr.mVtxIndex[1] = -1;
            clstr.BrkIndex[1] = -1;
            clstr.MergeError[1] = fMaxMergeError;
            // End info -> end index 0 (US)
            clstr.Wire[0] = cluster.EndWire();
            clstr.Time[0] = cluster.EndTick();
            clstr.X[0] = (float)detprop->ConvertTicksToX(cluster.EndTick(), ipl, tpc, cstat);
            clstr.Angle[0] = cluster.EndAngle();
            clstr.Slope[0] =  std::tan(cluster.EndAngle());
            clstr.Dir[0] = 0;
//            if(fabs(clstr.Slope[0]) > 0.02) clstr.Dir[0] = 1 * (2*(clstr.Slope[0]>0)-1);
            if(clstr.Time[1] > clstr.Time[0]) {
              clstr.Dir[0] = 1; clstr.Dir[1] = -1;
            } else {
              clstr.Dir[0] = -1; clstr.Dir[1] = 1;
            }
            clstr.Charge[0] = ChgNorm[ipl] * cluster.EndCharge();
            // this will be filled later
            clstr.ChgNear[1] = 0;
            clstr.VtxIndex[0] = -1;
            clstr.mVtxIndex[0] = -1;
            clstr.BrkIndex[0] = -1;
            clstr.MergeError[0] = fMaxMergeError;
            // other info
            clstr.InTrack = -1;
            clstr.Length = (unsigned short)(0.5 + clstr.Wire[1] - clstr.Wire[0]);
            clstr.TotChg = ChgNorm[ipl] * cluster.Integral();
            if(clstr.TotChg <= 0) clstr.TotChg = 1;
            clusterhits = fmCluHits.at(icl);
            if(clusterhits.size() == 0) {
              mf::LogError("CCTM")<<"No associated cluster hits "<<icl;
              continue;
            }
            // correct charge for missing cluster hits
            clstr.TotChg *= clstr.Length / (float)clusterhits.size();
            cls[ipl].push_back(clstr);
          } // ii (icl)
        } // ipl
        
        
//        std::cout<<"FillChgNear "<<evt.event()<<"\n";
        FillChgNear();
        
        // and finally the vertices
        double xyz[3];
        for(unsigned short ivx = 0; ivx < vtxlist.size(); ++ivx) {
          vtxPar aVtx;
          aVtx.ID = ivx + 1;
          aVtx.EvtIndex = ivx;
          vtxlist[ivx]->XYZ(xyz);
          aVtx.X = xyz[0];
          aVtx.Y = xyz[1];
          aVtx.Z = xyz[2];
          aVtx.nClusInPln[0] = 0;
          aVtx.nClusInPln[1] = 0;
          aVtx.nClusInPln[2] = 0;
          std::vector<art::Ptr<recob::Cluster>> const& vtxCls = fmVtxCls.at(ivx);
          std::vector<const unsigned short*> const& vtxClsEnd = fmVtxCls.data(ivx);
          for(unsigned short vcass = 0; vcass < vtxCls.size(); ++vcass) {
            icl = vtxCls[vcass].key();
            // the cluster plane
            ipl = vtxCls[vcass]->Plane().Plane;
            end = *vtxClsEnd[vcass];
            if(end > 1) throw cet::exception("CCTM")<<"Invalid end data from vertex - cluster association"<<end;
            bool gotit = false;
            // CCTM end is opposite of CC end
            end = 1 - end;
            for(unsigned short jcl = 0; jcl < cls[ipl].size(); ++jcl) {
              if(cls[ipl][jcl].EvtIndex == icl) {
                cls[ipl][jcl].VtxIndex[end] = ivx;
                ++aVtx.nClusInPln[ipl];
                gotit = true;
                break;
              } // index check
            } // jcl
            if(!gotit) throw cet::exception("CCTM")<<"Bad index from vertex - cluster association"<<icl;
          } // icl
          vtx.push_back(aVtx);
        } // ivx
        // Find broken clusters
        MakeClusterChains(fmCluHits);
        FindMaybeVertices();
        
        // call algorithms in the specified order
        matcomb.clear();
        for(algIndex = 0; algIndex < fMatchAlgs.size(); ++algIndex) {
          if(fMatchAlgs[algIndex] == 1) {
            prt = (fDebugAlg == 1);
            VtxMatch(fmCluHits);
            if(fMakeAlgTracks[algIndex]) SortMatches(fmCluHits, 1);
          } else
          if(fMatchAlgs[algIndex] == 2) {
            prt = (fDebugAlg == 2);
            PlnMatch(fmCluHits);
            if(fMakeAlgTracks[algIndex]) SortMatches(fmCluHits, 2);
          }
          if(prt) PrintClusters();
        } // algIndex
        prt = false;
        pfpToTrkID.clear();
        // Determine the vertex/track hierarchy
        if(fMakePFPs) {
          TagCosmics();
          MakeFamily();
        }
        FitVertices();
        
        // Make PFParticles -> tracks
        for(unsigned short ipf = 0; ipf < pfpToTrkID.size(); ++ipf) {
          // trackID of this PFP
          tID = pfpToTrkID[ipf];
          if(tID > trk.size()+1) {
            mf::LogWarning("CCTM")<<"Bad track ID";
            continue;
          }
          dtrIndices.clear();
          // load the daughter PFP indices
          mf::LogVerbatim("CCTM")<<"PFParticle "<<ipf<<" tID "<<tID;
          for(unsigned short jpf = 0; jpf < pfpToTrkID.size(); ++jpf) {
            itr = pfpToTrkID[jpf] - 1; // convert from track ID to track index
            if(trk[itr].MomID == tID) dtrIndices.push_back(jpf);
            if(trk[itr].MomID == tID) mf::LogVerbatim("CCTM")<<" dtr jpf "<<jpf<<" itr "<<itr;
          } // jpf
          unsigned short parentIndex = USHRT_MAX;
          if(tID == 0) {
            // make neutrino PFP USHRT_MAX == primary PFP
            recob::PFParticle pfp(14, ipf, parentIndex, dtrIndices);
            pcol->emplace_back(std::move(pfp));
            for(unsigned short ivx = 0; ivx < vtx.size(); ++ivx) {
              if(!vtx[ivx].Neutrino) continue;
              // make the vertex
              xyz[0] = vtx[ivx].X;
              xyz[1] = vtx[ivx].Y;
              xyz[2] = vtx[ivx].Z;
              size_t vStart = vcol->size();
              recob::Vertex vertex(xyz, vtx[ivx].ID);
              vcol->emplace_back(std::move(vertex));
              size_t vEnd = vcol->size();
              // PFParticle - vertex association
              util::CreateAssn(*this, evt, *pcol, *vcol, *pvassn, vStart, vEnd);
              vtx[ivx].ID = -vtx[ivx].ID;
              break;
            } // ivx
          } else if(tID > 0){
            // make non-neutrino PFP. Need to find the parent PFP index
            // Track index of this PFP
            tIndex = tID - 1;
            // trackID of this PFP parent
            for(unsigned short ii = 0; ii < pfpToTrkID.size(); ++ii) {
              if(pfpToTrkID[ii] == trk[tIndex].MomID) {
                parentIndex = ii;
                break;
              }
            } // ii
            // PFParticle
            mf::LogVerbatim("CCTM")<<"daughters tID "<<tID<<" pdg "<<trk[tIndex].PDGCode<<" ipf "<<ipf<<" parentIndex "<<parentIndex<<" dtr size "<<dtrIndices.size();
            recob::PFParticle pfp(trk[tIndex].PDGCode, ipf, parentIndex, dtrIndices);
            pcol->emplace_back(std::move(pfp));
            // track
            // make the track
            size_t tStart = tcol->size();
            recob::Track track(trk[tIndex].TrjPos, trk[tIndex].TrjDir, tmpCov, dQdx, mom, tID);
            tcol->emplace_back(std::move(track));
            size_t tEnd = tcol->size();
            // PFParticle - track association
            util::CreateAssn(*this, evt, *pcol, *tcol, *ptassn, tStart, tEnd);
            // flag this track as already put in the event
            trk[tIndex].ID = -trk[tIndex].ID;
            // track -> hits association
            tmpHits.clear();
            for(ipl = 0; ipl < nplanes; ++ipl)
              tmpHits.insert(tmpHits.end(), trk[tIndex].TrkHits[ipl].begin(), trk[tIndex].TrkHits[ipl].end());
            util::CreateAssn(*this, evt, *tcol, tmpHits, *thassn);
            // Find seed hits and the end of the track that is best
            end = 0;
//            FindSeedHits(tIndex, end);
            unsigned short itj = 0;
            if(end > 0) itj = trk[tIndex].TrjPos.size() - 1;
            for(unsigned short ii = 0; ii < 3; ++ii) {
              sPos[ii] = trk[tIndex].TrjPos[itj](ii);
              sDir[ii] = trk[tIndex].TrjDir[itj](ii);
            } // ii
            size_t sStart = scol->size();
            recob::Seed seed(sPos, sDir, sErr, sErr);
            scol->emplace_back(std::move(seed));
            size_t sEnd = scol->size();
            // PFP-seed association
            util::CreateAssn(*this, evt, *pcol, *scol, *psassn, sStart, sEnd);
            // Seed-hit association
            tmpHits.clear();
            for(ipl = 0; ipl < nplanes; ++ipl)
              tmpHits.insert(tmpHits.end(), seedHits[ipl].begin(), seedHits[ipl].end());
            util::CreateAssn(*this, evt, *scol, tmpHits, *shassn);
            // cluster association
            // PFP-cluster association
            tmpCls.clear();
            for(unsigned short ii = 0; ii < trk[tIndex].ClsEvtIndices.size(); ++ii) {
              icl = trk[tIndex].ClsEvtIndices[ii];
              tmpCls.push_back(clusterlist[icl]);
            } // ii
            util::CreateAssn(*this, evt, *pcol, tmpCls, *pcassn);
          } // non-neutrino PFP
        } // ipf
        // make non-PFP tracks
        for(unsigned short itr = 0; itr < trk.size(); ++itr) {
          // ignore already saved tracks
          if(trk[itr].ID < 0) continue;
          recob::Track track(trk[itr].TrjPos, trk[itr].TrjDir, tmpCov, dQdx, mom, trk[itr].ID);
          tcol->emplace_back(std::move(track));
          tmpHits.clear();
          for(ipl = 0; ipl < nplanes; ++ipl)
            tmpHits.insert(tmpHits.end(), trk[itr].TrkHits[ipl].begin(), trk[itr].TrkHits[ipl].end());
          util::CreateAssn(*this, evt, *tcol, tmpHits, *thassn);
        } // itr
        // make remnant vertices
        for(unsigned short ivx = 0; ivx < vtx.size(); ++ivx) {
          if(vtx[ivx].ID < 0) continue;
          xyz[0] = vtx[ivx].X;
          xyz[1] = vtx[ivx].Y;
          xyz[2] = vtx[ivx].Z;
          recob::Vertex vertex(xyz, vtx[ivx].ID);
          vcol->emplace_back(std::move(vertex));
        }
        if(fDebugAlg > 0) PrintTracks();

        double orphanLen = 0;
        for(ipl = 0; ipl < nplanes; ++ipl) {
          for(icl = 0; icl < cls[ipl].size(); ++icl) {
            if(cls[ipl][icl].Length > 40 && cls[ipl][icl].InTrack < 0) {
              orphanLen += cls[ipl][icl].Length;
              // unused cluster
              mf::LogVerbatim("CCTM")<<"Orphan long cluster "<<ipl<<":"<<icl<<":"<<cls[ipl][icl].Wire[0]
              <<":"<<(int)cls[ipl][icl].Time[0]<<" length "<<cls[ipl][icl].Length;
            }
          } // icl
 
          cls[ipl].clear();
          clsChain[ipl].clear();
        } // ipl
        std::cout<<"Total orphan length "<<orphanLen<<"\n";
        trkHits[ipl].clear();
        seedHits[ipl].clear();
        vxCls[ipl].clear();
      } // tpc
    } // cstat

    evt.put(std::move(pcol));
    evt.put(std::move(ptassn));
    evt.put(std::move(pcassn));
    evt.put(std::move(pvassn));
    evt.put(std::move(psassn));
    evt.put(std::move(tcol));
    evt.put(std::move(thassn));
    evt.put(std::move(scol));
    evt.put(std::move(vcol));
    
    // final cleanup
    vtx.clear();
    trk.clear();
    allhits.clear();
    matcomb.clear();
    pfpToTrkID.clear();
    
    
  } // produce

/*
  void CCTrackMaker::FindSeedHits(unsigned short itk, unsigned short& end)
  {
    // Returns a subset of track hits that are near the start position and form
    // a decently fit line
    
    unsigned short ipl;
    for(ipl = 0; ipl < 3; ++ipl) seedHits[ipl].clear();
    
    unsigned short maxLen = 0, minLen = USHRT_MAX, midLen = 0;
    for(unsigned short tEnd = 0; tEnd < 2; ++tEnd) {
      if(!trk[itk].GoodEnd[tEnd]) continue;
      for(ipl = 0; ipl < nplanes; ++ipl) {
        if(trkHits[ipl].size() > maxLen) maxLen = trkHits[ipl].size();
        if(trkHits[ipl].size() < minLen) minLen = trkHits[ipl].size();
      }
      // Return all track hits if it is short
      if(maxLen < 10) {
        for(ipl = 0; ipl < nplanes; ++ipl) seedHits[ipl] = trkHits[ipl];
        end = tEnd;
        return;
      } // short track
      // start a seed using 2 hits in the "middle length" plane
      unsigned short midLenPln = 0;
      for(ipl = 0; ipl < nplanes; ++ipl) {
        if(trkHits[ipl].size() >= minLen && trkHits[ipl].size() <= maxLen) {
          midLenPln = ipl;
          midLen = trkHits[ipl].size();
          break;
        }
      } // ipl
      // ratio of hit lengths in each plane
      std::array<float, 3> hitRat;
      for(ipl = 0; ipl < nplanes; ++ipl) hitRat[ipl] = (float)trkHits[ipl].size() / float(midLen);
      // working vectors passed to TrackLineFitAlg
      std::vector<geo::WireID> hitWID;
      std::vector<double> hitX;
      std::vector<double> hitXErr;
      TVector3 xyz, dir;
      float ChiDOF;
      double xOrigin = TrjPos[tEnd](0);
      fTrackLineFitAlg.TrkLineFit(hitWID, hitX, hitXErr, xOrigin, xyz, dir, ChiDOF);

      end = tEnd;
      return;
    } // tend
    
  } // FindSeedHits
*/
  
  void CCTrackMaker::FitVertices()
  {
    
    std::vector<std::vector<geo::WireID>> hitWID;
    std::vector<std::vector<double>> hitX;
    std::vector<std::vector<double>> hitXErr;
    TVector3 pos, posErr;
    std::vector<TVector3> trkDir;
    std::vector<TVector3> trkDirErr;
    float ChiDOF;
    
    if(fNVtxTrkHitsFit == 0) return;
    
    unsigned short indx, indx2, iht, nHitsFit;
    
//    mf::LogVerbatim("CCTM")<<"Inside FitVertices "<<vtx.size()<<" trks "<<trk.size()<<"\n";
    
    for(unsigned short ivx = 0; ivx < vtx.size(); ++ivx) {
      if(!vtx[ivx].Neutrino) continue;
      hitWID.clear();
      hitX.clear();
      hitXErr.clear();
      trkDir.clear();
      // find the tracks associated with this vertex
      unsigned int thePln, theTPC, theCst;
      for(unsigned short itk = 0; itk < trk.size(); ++itk) {
        for(unsigned short end = 0; end < 2; ++end) {
          if(trk[itk].VtxIndex[end] != ivx) continue;
          unsigned short itj = 0;
          if(end == 1) itj = trk[itk].TrjPos.size() - 1;
// mf::LogVerbatim("CCTM")<<"ivx "<<ivx<<" trk "<<itk<<" end "<<end<<" TrjPos "<<trk[itk].TrjPos[itj](0)<<" "<<trk[itk].TrjPos[itj](1)<<" "
//            <<trk[itk].TrjPos[itj](2)<<" TrjDir "<<trk[itk].TrjDir[itj](0)<<" "<<trk[itk].TrjDir[itj](1)<<" "<<trk[itk].TrjDir[itj](2);
          // increase the size of the hit vectors by 1 for this track
          indx = hitX.size();
          hitWID.resize(indx + 1);
          hitX.resize(indx + 1);
          hitXErr.resize(indx + 1);
          trkDir.resize(indx + 1);
          trkDir[indx] = trk[itk].TrjDir[itj];
          for(unsigned short ipl = 0; ipl < nplanes; ++ipl) {
            if(trk[itk].TrkHits[ipl].size() < 2) continue;
            // make slots for the hits on this track in this plane
            nHitsFit = trk[itk].TrkHits[ipl].size();
            if(nHitsFit > fNVtxTrkHitsFit) nHitsFit = fNVtxTrkHitsFit;
            indx2 = hitWID[indx].size();
            hitWID[indx].resize(indx2 + nHitsFit);
            hitX[indx].resize(indx2 + nHitsFit);
            hitXErr[indx].resize(indx2 + nHitsFit);
            for(unsigned short ii = 0; ii < nHitsFit; ++ii) {
              if(end == 0) {
                iht = ii;
              } else {
                iht = trk[itk].TrkHits[ipl].size() - ii - 1;
              }
              hitWID[indx][indx2 + ii] = trk[itk].TrkHits[ipl][iht]->WireID();
              thePln = trk[itk].TrkHits[ipl][iht]->WireID().Plane;
              theTPC = trk[itk].TrkHits[ipl][iht]->WireID().TPC;
              theCst = trk[itk].TrkHits[ipl][iht]->WireID().Cryostat;
              hitX[indx][indx2 + ii] = detprop->ConvertTicksToX(trk[itk].TrkHits[ipl][iht]->PeakTime(), thePln, theTPC, theCst);
              hitXErr[indx][indx2 + ii] = fHitFitErrFac * trk[itk].TrkHits[ipl][iht]->RMS();
// mf::LogVerbatim("CCTM")<<"CCTM "<<itk<<" indx "<<indx<<" ii "<<ii<<" WID "<<trk[itk].TrkHits[ipl][iht]->WireID()
//              <<" X "<<hitX[indx][indx2 + ii]<<" XErr "<<hitXErr[indx][indx2 + ii]<<" RMS "<<trk[itk].TrkHits[ipl][iht]->RMS()
//              <<" SigmaPeakTime "<<trk[itk].TrkHits[ipl][iht]->SigmaPeakTime();
            } // ii
          } // ipl
        } // end
      } // itk
      if(hitX.size() < 2) {
        mf::LogVerbatim("CCTM")<<"Not enough hits to fit vtx "<<ivx;
        continue;
      } // hitX.size() < 2
      pos(0) = vtx[ivx].X;
      pos(1) = vtx[ivx].Y;
      pos(2) = vtx[ivx].Z;
      fVertexFitAlg.VertexFit(hitWID, hitX, hitXErr, pos, posErr, trkDir, trkDirErr, ChiDOF);
/*
      mf::LogVerbatim("CCTM")<<"FV: CC Vtx pos "<<vtx[ivx].X<<" "<<vtx[ivx].Y<<" "<<vtx[ivx].Z;
      mf::LogVerbatim("CCTM")<<"FV: Fitted     "<<pos[0]<<" "<<pos[1]<<" "<<pos[2]<<" ChiDOF "<<ChiDOF;
      mf::LogVerbatim("CCTM")<<"FV: Errors     "<<posErr[0]<<" "<<posErr[1]<<" "<<posErr[2];
*/
      if(ChiDOF > 3000) continue;
      // update the vertex position
      vtx[ivx].X = pos(0);
      vtx[ivx].Y = pos(1);
      vtx[ivx].Z = pos(2);
      // and the track trajectory
      unsigned short fitTrk = 0;
      for(unsigned short itk = 0; itk < trk.size(); ++itk) {
        for(unsigned short end = 0; end < 2; ++end) {
          if(trk[itk].VtxIndex[end] != ivx) continue;
          unsigned short itj = 0;
          if(end == 1) itj = trk[itk].TrjPos.size() - 1;
          trk[itk].TrjDir[itj] = trkDir[fitTrk];
          ++fitTrk;
        } // end
      } // itk
    } // ivx
  } // FitVertices
  
  void CCTrackMaker::FillChgNear()
  {
    // fills the CHgNear array
    
    unsigned short wire, nwires, indx;
    float dir, ctime, cx, chgWinLo, chgWinHi;
    float cnear;
    
    for(unsigned short ipl = 0; ipl < nplanes; ++ipl) {
      for(unsigned short icl = 0; icl < cls[ipl].size(); ++icl) {
        // find the nearby charge at the US and DS ends
        nwires = cls[ipl][icl].Length / 2;
        if(nwires < 2) continue;
        // maximum of 30 wires for long clusters
        if(nwires > 30) nwires = 30;
        for(unsigned short end = 0; end < 2; ++end) {
          cnear = 0;
          // direction for adding/subtracting wire numbers
          dir = 1 - 2 * end;
          for(unsigned short w = 0; w < nwires; ++w) {
            wire = cls[ipl][icl].Wire[end] + dir * w;
            cx = cls[ipl][icl].X[end] + dir * w * cls[ipl][icl].Slope[end] * fWirePitch;
            ctime = detprop->ConvertXToTicks(cx, ipl, tpc, cstat);
            chgWinLo = ctime - fChgWindow;
            chgWinHi = ctime + fChgWindow;
            indx = wire - firstWire[ipl];
            if(WireHitRange[ipl][indx].first < 0) continue;
            unsigned int firhit = WireHitRange[ipl][indx].first;
            unsigned int lashit = WireHitRange[ipl][indx].second;
            for(unsigned int hit = firhit; hit < lashit; ++hit) {
              if(hit > allhits.size() - 1) {
                mf::LogError("CCTM")<<"FillChgNear bad lashit "<<lashit<<" size "<<allhits.size()<<"\n";
                continue;
              }
              if(allhits[hit]->PeakTime() < chgWinLo) continue;
              if(allhits[hit]->PeakTime() > chgWinHi) continue;
              cnear += allhits[hit]->Integral();
            } // hit
          } // w
          cnear /= (float)(nwires-1);
          if(cnear > cls[ipl][icl].Charge[end]) {
            cls[ipl][icl].ChgNear[end] = ChgNorm[ipl] * cnear / cls[ipl][icl].Charge[end];
          } else {
            cls[ipl][icl].ChgNear[end] = 0;
          }
        } // end
      } // icl
    } //ipl
    
  } // FillChgNear
  
  
  void CCTrackMaker::MakeFamily()
  {
    // define the track/vertex and mother/daughter relationships
    
    unsigned short ivx, itr, ipl, ii, jtr;
    unsigned short nus, nds, nuhs, ndhs;
    float longUSTrk, longDSTrk, qual;
    
    // min distance^2 between a neutrino vertex candidate and a through
    // going muon
    float tgMuonCut2 = 9;
    
    // struct for neutrino vertex candidates
    struct NuVtx {
      unsigned short VtxIndex;
      unsigned short nUSTk;
      unsigned short nDSTk;
      unsigned short nUSHit;
      unsigned short nDSHit;
      float longUSTrk;
      float longDSTrk;
      float Qual;
    };
    std::vector<NuVtx> nuVtxCand;
    
    NuVtx aNuVtx;
    
    // analyze all of the vertices
    float best = 999, dx, dy, dz, dr;
    short imbest = -1;
    bool skipVtx;
    unsigned short itj;
    for(ivx = 0; ivx < vtx.size(); ++ivx) {
      vtx[ivx].Neutrino = false;
      nus = 0; nds = 0; nuhs = 0; ndhs = 0;
      longUSTrk = 0; longDSTrk = 0;
      skipVtx = false;
      // skip vertices that are close to through-going muons
      for(itr = 0; itr < trk.size(); ++itr) {
        if(trk[itr].ID < 0) continue;
        if(trk[itr].PDGCode != 13) continue;
        for(itj = 0; itj < trk[itr].TrjPos.size(); ++itj) {
          dx = trk[itr].TrjPos[itj](0) - vtx[ivx].X;
          dy = trk[itr].TrjPos[itj](1) - vtx[ivx].Y;
          dz = trk[itr].TrjPos[itj](2) - vtx[ivx].Z;
          dr = dx * dx + dy * dy + dz * dz;
          if(dr < tgMuonCut2) {
            skipVtx = true;
            break;
          }
          if(skipVtx) break;
        } // itj
        if(skipVtx) break;
      } // itr
      if(skipVtx) continue;
      for(itr = 0; itr < trk.size(); ++itr) {
        if(trk[itr].ID < 0) continue;
        if(trk[itr].VtxIndex[0] == ivx) {
          // DS-going track
          ++nds;
          if(trk[itr].Length > longDSTrk) longDSTrk = trk[itr].Length;
          for(ipl = 0; ipl < nplanes; ++ipl) ndhs += trk[itr].TrkHits[ipl].size();
//  std::cout<<"MakeFamily: ivx "<<ivx<<" DS itr "<<trk[itr].ID<<" len "<<trk[itr].Length<<"\n";
        } // DS-going track
        // Reject this vertex as a neutrino candidate if the track being
        // considered has a starting vertex
        if(trk[itr].VtxIndex[1] == ivx && trk[itr].VtxIndex[0] >= 0) {
          skipVtx = true;
          break;
        } // trk[itr].VtxIndex[0] > 0
        if(trk[itr].VtxIndex[1] == ivx && trk[itr].VtxIndex[0] < 0) {
          // US-going track w no US vertex
          ++nus;
          if(trk[itr].Length > longUSTrk) longUSTrk = trk[itr].Length;
          for(ipl = 0; ipl < nplanes; ++ipl) nuhs += trk[itr].TrkHits[ipl].size();
//  std::cout<<"MakeFamily: ivx "<<ivx<<" US itr "<<trk[itr].ID<<" len "<<trk[itr].Length<<"\n";
        } // US-going track
      } // itr
      if(skipVtx) continue;
      if(nds == 0) continue;
      qual = 1 / (float)nds;
      qual /= (float)ndhs;
      if(nus > 0) qual *= (float)nuhs / (float)ndhs;
      if(qual < best) {
        best = qual;
        imbest = ivx;
      }
      if(nds > 0 && longDSTrk > 5) {
        // at least one longish track going DS
        aNuVtx.VtxIndex = ivx;
        aNuVtx.nUSTk = nus;
        aNuVtx.nDSTk = nds;
        aNuVtx.nUSHit = nuhs;
        aNuVtx.nDSHit = ndhs;
        aNuVtx.longUSTrk = longUSTrk;
        aNuVtx.longDSTrk = longDSTrk;
        aNuVtx.Qual = qual;
        nuVtxCand.push_back(aNuVtx);
      }
    } // ivx
/*
    mf::LogVerbatim("CCTM")<<"Neutrino vtx candidates";
    for(unsigned short ican = 0; ican < nuVtxCand.size(); ++ican)
       mf::LogVerbatim("CCTM")<<"Can "<<ican<<" vtx "<<nuVtxCand[ican].VtxIndex<<" nUSTk "<<nuVtxCand[ican].nUSTk
        <<" nUSHit "<<nuVtxCand[ican].nUSHit<<" longUS "<<nuVtxCand[ican].longUSTrk<<" nDSTk "<<nuVtxCand[ican].nDSTk
        <<" nDSHit "<<nuVtxCand[ican].nDSHit<<" longDS "<<nuVtxCand[ican].longDSTrk<<" Qual "<<nuVtxCand[ican].Qual;
*/
    if(imbest < 0) return;
    
    // Found the neutrino interaction vertex
    ivx = imbest;
    vtx[ivx].Neutrino = true;
    // Put a 0 into the PFParticle -> track vector to identify a neutrino
    // track with no trajectory or hits
    pfpToTrkID.push_back(0);
    
    // list of DS-going current generation daughters so we can fix next
    // generation daughter assignments. This code section assumes that there
    // are no decays or 2ndry interactions with US-going primary tracks.
    std::vector<unsigned short> dtrGen;
    std::vector<unsigned short> dtrNextGen;
    for(itr = 0; itr < trk.size(); ++itr) {
      if(trk[itr].ID < 0) continue;
      if(trk[itr].VtxIndex[0] == ivx) {
        // DS-going primary track
        trk[itr].MomID = 0;
        // call every track coming from a neutrino vertex a proton
        trk[itr].PDGCode = 2212;
        pfpToTrkID.push_back(trk[itr].ID);
        dtrGen.push_back(itr);
      } // DS-going primary track
      if(trk[itr].VtxIndex[1] == ivx) {
        // US-going primary track
        trk[itr].MomID = 0;
        // call every track coming from a neutrino vertex a proton
        trk[itr].PDGCode = 2212;
        pfpToTrkID.push_back(trk[itr].ID);
        // reverse the track trajectory
        std::reverse(trk[itr].TrjPos.begin(), trk[itr].TrjPos.end());
        for(ii = 0; ii < trk[itr].TrjDir.size(); ++ii)
          trk[itr].TrjDir[ii] = -trk[itr].TrjDir[ii];
      } // DS-going primary track
    } // itr
    
    if(dtrGen.size() == 0) return;
    
    unsigned short tmp, indx;
    unsigned short nit = 0;
    
    // follow daughters through all generations (< 10). Daughter tracks
    // may go US or DS
    while(nit < 10) {
      ++nit;
      dtrNextGen.clear();
      // Look for next generation daughters
      for(ii = 0; ii < dtrGen.size(); ++ii) {
        itr = dtrGen[ii];
        if(trk[itr].VtxIndex[1] >= 0) {
          // found a DS vertex
          ivx = trk[itr].VtxIndex[1];
          // look for a track associated with this vertex
          for(jtr = 0; jtr < trk.size(); ++jtr) {
            if(jtr == itr) continue;
            if(trk[jtr].VtxIndex[0] == ivx) {
              // DS-going track
              indx = trk[itr].DtrID.size();
              trk[itr].DtrID.resize(indx + 1);
              trk[itr].DtrID[indx] = jtr;
//              std::cout<<"itr "<<itr<<" dtr "<<jtr<<" DtrID size "<<trk[itr].DtrID.size()<<"\n";
              trk[jtr].MomID = trk[itr].ID;
              // call all daughters pions
              trk[jtr].PDGCode = 211;
              dtrNextGen.push_back(jtr);
              pfpToTrkID.push_back(trk[jtr].ID);
            } // DS-going track
            if(trk[jtr].VtxIndex[1] == ivx) {
              // US-going track
              indx = trk[itr].DtrID.size();
              trk[itr].DtrID.resize(indx + 1);
              trk[itr].DtrID[indx] = jtr;
//              std::cout<<"itr "<<itr<<" dtr "<<jtr<<" DtrID size "<<trk[itr].DtrID.size()<<"\n";
              trk[jtr].MomID = trk[itr].ID;
              // call all daughters pions
              trk[jtr].PDGCode = 211;
              dtrNextGen.push_back(jtr);
              pfpToTrkID.push_back(trk[jtr].ID);
              // reverse the track trajectory
              std::reverse(trk[jtr].TrjPos.begin(), trk[jtr].TrjPos.end());
              for(unsigned short jj = 0; jj < trk[jtr].TrjDir.size(); ++jj)
                trk[jtr].TrjDir[jj] = -trk[jtr].TrjDir[jj];
              // interchange the trk - vtx assignments
              tmp = trk[jtr].VtxIndex[0];
              trk[jtr].VtxIndex[0] = trk[jtr].VtxIndex[1];
              trk[jtr].VtxIndex[1] = tmp;
            } // DS-going track
          } // jtr
        } // trk[itr].VtxIndex[0] >= 0
      } // ii (itr)
      // break out if no next gen daughters found
      if(dtrNextGen.size() == 0) break;
      dtrGen = dtrNextGen;
    } // nit
    
  } // MakeFamily
  
  void CCTrackMaker::TagCosmics()
  {
    // Make cosmic ray PFParticles
    unsigned short ipf, itj;
    bool skipit = true;
    
    // Y,Z limits of the detector
    double local[3] = {0.,0.,0.};
    double world[3] = {0.,0.,0.};
    
    const geo::TPCGeo &thetpc = geom->TPC(tpc, cstat);
    thetpc.LocalToWorld(local,world);
    float XLo = world[0] - geom->DetHalfWidth(tpc,cstat) + fFiducialCut;
    float XHi = world[0] + geom->DetHalfWidth(tpc,cstat) - fFiducialCut;
    float YLo = world[1] - geom->DetHalfHeight(tpc,cstat) + fFiducialCut;
    float YHi = world[1] + geom->DetHalfHeight(tpc,cstat) - fFiducialCut;
    float ZLo = world[2] - geom->DetLength(tpc,cstat)/2 + fFiducialCut;
    float ZHi = world[2] + geom->DetLength(tpc,cstat)/2 - fFiducialCut;
    
    bool startsIn, endsIn;
    
    for(unsigned short itk = 0; itk < trk.size(); ++itk) {
      // ignore already used tracks
      if(trk[itk].ID < 0) continue;
      // ignore short tracks (< 10 cm)
      if(trk[itk].Length < 10) continue;
      // check for already identified PFPs
      skipit = false;
      for(ipf = 0; ipf < pfpToTrkID.size(); ++ipf) {
        if(pfpToTrkID[ipf] == trk[itk].ID) {
          skipit = true;
          break;
        }
      } // ipf
      if(skipit) continue;
      startsIn = true;
      if(trk[itk].TrjPos[0](0) < XLo || trk[itk].TrjPos[0](0) > XHi) startsIn = false;
      if(trk[itk].TrjPos[0](1) < YLo || trk[itk].TrjPos[0](1) > YHi) startsIn = false;
      if(trk[itk].TrjPos[0](2) < ZLo || trk[itk].TrjPos[0](2) > ZHi) startsIn = false;
//      std::cout<<"Trk "<<trk[itk].ID<<" X0 "<<(int)trk[itk].TrjPos[0](0)<<" Y0 "<<(int)trk[itk].TrjPos[0](1)<<" Z0 "<<(int)trk[itk].TrjPos[0](2)<<" startsIn "<<startsIn<<"\n";
      if(startsIn) continue;
      endsIn = true;
      itj = trk[itk].TrjPos.size() - 1;
      if(trk[itk].TrjPos[itj](0) < XLo || trk[itk].TrjPos[itj](0) > XHi) endsIn = false;
      if(trk[itk].TrjPos[itj](1) < YLo || trk[itk].TrjPos[itj](1) > YHi) endsIn = false;
      if(trk[itk].TrjPos[itj](2) < ZLo || trk[itk].TrjPos[itj](2) > ZHi) endsIn = false;
//      std::cout<<"     X1 "<<(int)trk[itk].TrjPos[itj](0)<<" Y1 "<<(int)trk[itk].TrjPos[itj](1)<<" Z1 "<<(int)trk[itk].TrjPos[itj](2)<<" endsIn "<<endsIn<<"\n";
      if(endsIn) continue;
      // call it a cosmic muon
      trk[itk].PDGCode = 13;
      pfpToTrkID.push_back(trk[itk].ID);
    } // itk
    
    if(fDeltaRayCut <= 0) return;
    
    for(unsigned short itk = 0; itk < trk.size(); ++itk) {
      // find a tagged cosmic ray
      if(trk[itk].PDGCode != 13) continue;
      
    } // itk
    
  } // TagCosmics
  
  void CCTrackMaker::VtxMatch(art::FindManyP<recob::Hit> const& fmCluHits)
  {
    // Use vertex assignments to match clusters
    unsigned short ivx, ii, ipl, icl, jj, jpl, jcl, kk, kpl, kcl;
    short idir, iend, jdir, jend, kdir, kend, ioend;
    
    for(ivx = 0; ivx < vtx.size(); ++ivx) {
      
      // list of cluster chains associated with this vertex in each plane
      for(ipl = 0; ipl < nplanes; ++ipl) {
        vxCls[ipl].clear();
        for(icl = 0; icl < clsChain[ipl].size(); ++icl) {
          if(clsChain[ipl][icl].InTrack >= 0) continue;
          for(iend = 0; iend < 2; ++iend) {
            if(clsChain[ipl][icl].VtxIndex[iend] == vtx[ivx].EvtIndex) vxCls[ipl].push_back(icl);
          } // end
        } // icl
      } // ipl
      
      if(prt) {
        mf::LogVerbatim myprt("CCTM");
        myprt<<"VtxMatch: Vertex ID "<<vtx[ivx].EvtIndex<<"\n";
        for(ipl = 0; ipl < nplanes; ++ipl) {
          myprt<<"ipl "<<ipl<<" cls";
          for(unsigned short ii = 0; ii < vxCls[ipl].size(); ++ii) myprt<<" "<<vxCls[ipl][ii];
          myprt<<"\n";
        } // ipl
      } // prt
      // match between planes, requiring clusters matched to this vertex
      iend = 0; jend = 0;
      bool gotkcl;
      float totErr;
      for(ipl = 0; ipl < nplanes; ++ipl) {
        if(nplanes == 2 && ipl > 0) continue;
        for(ii = 0; ii < vxCls[ipl].size(); ++ii) {
          icl = vxCls[ipl][ii];
          // ignore used clusters
          if(clsChain[ipl][icl].InTrack >= 0) continue;
          jpl = (ipl + 1) % nplanes;
          kpl = (jpl + 1) % nplanes;
          for(jj = 0; jj < vxCls[jpl].size(); ++jj) {
            jcl = vxCls[jpl][jj];
            if(clsChain[jpl][jcl].InTrack >= 0) continue;
            for(iend = 0; iend < 2; ++iend) {
              if(clsChain[ipl][icl].VtxIndex[iend] != vtx[ivx].EvtIndex) continue;
              ioend = 1 - iend;
              idir = clsChain[ipl][icl].Dir[iend];
              for(jend = 0; jend < 2; ++jend) {
                if(clsChain[jpl][jcl].VtxIndex[jend] != vtx[ivx].EvtIndex) continue;
                jdir = clsChain[jpl][jcl].Dir[jend];
                if(idir != 0 && jdir != 0 && idir != jdir) continue;
                // ignore outrageously bad other end X matches
                if(fabs(clsChain[jpl][jcl].X[1 - jend] - clsChain[ipl][icl].X[ioend]) > 50) continue;
                MatchPars match;
                match.Cls[ipl] = icl; match.End[ipl] = iend;
                match.Cls[jpl] = jcl; match.End[jpl] = jend;
                match.Vtx = ivx; match.oVtx = -1;
                // set large so that DupMatch doesn't get confused when called before FillEndMatch
                match.Err = 1E6; match.oErr = 1E6;
                if(nplanes == 2) {
//                  mf::LogVerbatim("CCTM")<<"chk "<<ipl<<":"<<match.Cls[ipl]<<":"<<match.End[ipl]<<" and "<<jpl<<":"<<match.Cls[jpl]<<":"<<match.End[jpl];
                  FillEndMatch2(match);
                  if(prt)  mf::LogVerbatim("CCTM")<<"FillEndMatch2: Err "<<match.Err<<" oErr "<<match.oErr;
                  if(match.Err + match.oErr > 100) continue;
                  if(DupMatch(match)) continue;
                  matcomb.push_back(match);
                  continue;
                }
                match.Cls[kpl] = -1;  match.End[kpl] = 0;
                if(prt) mf::LogVerbatim("CCTM")<<"VtxMatch: check "<<ipl<<":"<<icl<<":"<<iend<<" and "<<jpl<<":"<<jcl<<":"<<jend<<" for cluster in kpl "<<kpl;
                gotkcl = false;
                for(kk = 0; kk < vxCls[kpl].size(); ++kk) {
                  kcl = vxCls[kpl][kk];
                  if(clsChain[kpl][kcl].InTrack >= 0) continue;
                  for(kend = 0; kend < 2; ++kend) {
                    kdir = clsChain[kpl][kcl].Dir[kend];
                    if(idir != 0 && kdir != 0 && idir != kdir) continue;
                    if(clsChain[kpl][kcl].VtxIndex[kend] != vtx[ivx].EvtIndex) continue;
                    // rough check of other end match
                    // TODO: SHOWER-LIKE CLUSTER CHECK
                    match.Cls[kpl] = kcl; match.End[kpl] = kend;
                    // first call to ignore redundant matches
                    if(DupMatch(match)) continue;
                    FillEndMatch(match);
//                    mf::LogVerbatim("CCTM")<<" Chg "<<match.Chg[kpl]<<" Err "<<match.Err<<" oErr "<<match.oErr;
                    // ignore if no signal at the other end
                    if(match.Chg[kpl] <= 0) continue;
                    if(match.Err + match.oErr > 100) continue;
                    // second call to keep matches with better error
                    if(DupMatch(match)) continue;
                    matcomb.push_back(match);
                    gotkcl = true;
//                    break;
                  } // kend
                } // kk -> kcl
                if(gotkcl) continue;
                // look for a cluster that missed the vertex assignment
                float best = 10;
                short kbst = -1;
                unsigned short kbend = 0;
                if(prt) mf::LogVerbatim("CCTM")<<"VtxMatch: look for missed cluster chain in kpl";
                for(kcl = 0; kcl < clsChain[kpl].size(); ++kcl) {
                  if(clsChain[kpl][kcl].InTrack >= 0) continue;
                  for(kend = 0; kend < 2; ++kend) {
                    kdir = clsChain[kpl][kcl].Dir[kend];
                    if(idir != 0 && kdir != 0 && idir != kdir) continue;
                    if(clsChain[kpl][kcl].VtxIndex[kend] >= 0) continue;
                    // make a rough dX cut at the match end
                    if(fabs(clsChain[kpl][kcl].X[kend] - vtx[ivx].X) > 5) continue;
                    // and at the other end
                    if(fabs(clsChain[kpl][kcl].X[1 - kend] - clsChain[ipl][icl].X[ioend]) > 50) continue;
                    // check the error
                    match.Cls[kpl] = kcl; match.End[kpl] = kend;
                    if(DupMatch(match)) continue;
                    FillEndMatch(match);
                    totErr = match.Err + match.oErr;
                    if(prt) {
                      mf::LogVerbatim myprt("CCTM");
                      myprt<<"VtxMatch: Chk missing cluster match ";
                      for(unsigned short ii = 0; ii < nplanes; ++ii)
                        myprt<<" "<<ii<<":"<<match.Cls[ii]<<":"<<match.End[ii];
                      myprt<<" Err "<<match.Err<<"\n";
                    }
                    if(totErr > 100) continue;
                    if(totErr < best) {
                      best = totErr;
                      kbst = kcl;
                      kbend = kend;
                    }
                  } // kend
                } // kcl
                if(kbst >= 0) {
                  // found a decent match
                  match.Cls[kpl] = kbst; match.End[kpl] = kbend;
                  FillEndMatch(match);
                  matcomb.push_back(match);
                  // assign the vertex to this cluster
                  clsChain[kpl][kbst].VtxIndex[kbend] = ivx;
                  // and update vxCls
                  vxCls[kpl].push_back(kbst);
                } else {
                  // Try a 2 plane match if a 3 plane match didn't work
                  match.Cls[kpl] = -1; match.End[kpl] = 0;
                  if(DupMatch(match)) continue;
                  FillEndMatch(match);
                  if(match.Err + match.oErr < 100) matcomb.push_back(match);
                }
              } // jend
            } // iend
          } // jj
        } // ii -> icl
      } // ipl
      
      if(matcomb.size() == 0) continue;
      SortMatches(fmCluHits, 1);
      
    } // ivx
    
    for(ipl = 0; ipl < 3; ++ipl) vxCls[ipl].clear();
    
  } // VtxMatch
  
  void CCTrackMaker::FindMaybeVertices()
  {
    // Project clusters to vertices and fill mVtxIndex. No requirement is
    // made that charge exists on the line between the Begin (End) of the
    // cluster and the vertex
    unsigned short ipl, icl, end, ivx, oend;
    float best, dWire, dX;
    short ibstvx;
    
    if(vtx.size() == 0) return;
    
    for(ipl = 0; ipl < nplanes; ++ipl) {
      for(icl = 0; icl < cls[ipl].size(); ++icl) {
        for(end = 0; end < 2; ++end) {
          // ignore already attached clusters
          if(cls[ipl][icl].VtxIndex[end] >= 0) continue;
          ibstvx = -1;
          best = 1.;
          // index of the other end
          oend = 1 - end;
          for(ivx = 0; ivx < vtx.size(); ++ ivx) {
            // ignore if the other end is attached to this vertex (which can happen with short clusters)
            if(cls[ipl][icl].VtxIndex[oend] == ivx) continue;
            dWire = geom->WireCoordinate(vtx[ivx].Y, vtx[ivx].Z, ipl, tpc, cstat) - cls[ipl][icl].Wire[end];
            /*
             if(prt) std::cout<<"FMV: ipl "<<ipl<<" icl "<<icl<<" end "<<end
             <<" vtx wire "<<geom->WireCoordinate(vtx[ivx].Y, vtx[ivx].Z, ipl, tpc, cstat)
             <<" cls wire "<<cls[ipl][icl].Wire[end]
             <<" dWire "<<dWire<<"\n";
             */
            if(end == 0) {
              if(dWire > 30 || dWire < -2) continue;
            } else {
              if(dWire < -30 || dWire > 2) continue;
            }
            // project the cluster to the vertex wire
            dX = fabs(cls[ipl][icl].X[end] + cls[ipl][icl].Slope[end] * fWirePitch * dWire - vtx[ivx].X);
            //            if(prt) std::cout<<"dX "<<dX<<"\n";
            if(dX < best) {
              best = dX;
              ibstvx = ivx;
            }
          } // ivx
          if(ibstvx >= 0) {
            // attach
            cls[ipl][icl].VtxIndex[end] = ibstvx;
            cls[ipl][icl].mVtxIndex[end] = ibstvx;
          }
        } // end
      } // icl
    } // ipl
    
  } // FindMaybeVertices
  
  void CCTrackMaker::MakeClusterChains(art::FindManyP<recob::Hit> const& fmCluHits)
  {
    
    unsigned short ipl, icl, icl1, icl2;
    float dw, dx, dWCut, dw1Max, dw2Max;
    float dA, dA2, dACut = fMaxDAng, chgAsymCut;
    float dXCut, chgasym, mrgErr;
    // long straight clusters
    bool ls1, ls2;
    bool gotprt = false;
    for(ipl = 0; ipl < nplanes; ++ipl) {
      if(cls[ipl].size() > 1) {
        for(icl1 = 0; icl1 < cls[ipl].size() - 1; ++icl1) {
          prt = (fDebugAlg == 666 && ipl == fDebugPlane && icl1 == fDebugCluster);
          if(prt) gotprt = true;
          // maximum delta Wire overlap is 10% of the total length
          dw1Max = 0.6 * cls[ipl][icl1].Length;
          ls1 = (cls[ipl][icl1].Length > 100 && fabs(cls[ipl][icl1].Angle[0] - cls[ipl][icl1].Angle[1]) < 0.04);
          for(icl2 = icl1 + 1; icl2 < cls[ipl].size(); ++icl2) {
            ls2 = (cls[ipl][icl2].Length > 100 && fabs(cls[ipl][icl2].Angle[0] - cls[ipl][icl2].Angle[1]) < 0.04);
            dw2Max = 0.6 * cls[ipl][icl2].Length;
            // set overlap cut to be the shorter of the two
            dWCut = dw1Max;
            if(dw2Max < dWCut) dWCut = dw2Max;
            // but not exceeding 20 for very long clusters
            if(dWCut > 100) dWCut = 100;
            if(dWCut < 2) dWCut = 2;
            chgAsymCut = fMergeChgAsym;
            // Compare end 1 of icl1 with end 0 of icl2
            
            if(prt) mf::LogVerbatim("CCTM")<<"MCC P:C:W icl1 "<<ipl<<":"<<icl1<<":"<<cls[ipl][icl1].Wire[1]<<" vtx "<<cls[ipl][icl1].VtxIndex[1]<<" ls1 "<<ls1<<" icl2 "<<ipl<<":"<<icl2<<":"<<cls[ipl][icl2].Wire[0]<<" vtx "<<cls[ipl][icl2].VtxIndex[0]<<" ls2 "<<ls2<<" dWCut "<<dWCut;
            if(std::abs(cls[ipl][icl1].Wire[1]  - cls[ipl][icl2].Wire[0]) > dWCut) continue;
            // ignore if the clusters begin/end on the same wire
//            if(cls[ipl][icl1].Wire[1]  == cls[ipl][icl2].Wire[0]) continue;
            // or if the angle exceeds the cut
            float af = AngleFactor(cls[ipl][icl1].Slope[1]);
            dACut = fMaxDAng * af;
            dXCut = fChainMaxdX * 5 * af;
            dA = fabs(cls[ipl][icl1].Angle[1] - cls[ipl][icl2].Angle[0]);
            // compare the match angle at the opposite ends of the clusters.
            // May have a bad end/begin angle if there is a delta-ray in the middle
            dA2 = fabs(cls[ipl][icl1].Angle[0] - cls[ipl][icl2].Angle[1]);
            
            if(prt) mf::LogVerbatim("CCTM")<<" dA "<<dA<<" dA2 "<<dA2<<" DACut "<<dACut<<" dXCut "<<dXCut;
            
            if(dA2 < dA) dA = dA2;
            // ignore vertices that have only two associated clusters and
            // the angle is small
            if(dA < fChainVtxAng && cls[ipl][icl1].VtxIndex[1] >= 0) {
              dw = fWirePitch * (cls[ipl][icl2].Wire[0] - cls[ipl][icl1].Wire[1]);
              dx = cls[ipl][icl1].X[1] + cls[ipl][icl1].Slope[1] * dw * fWirePitch - cls[ipl][icl2].X[0];
              unsigned short ivx = cls[ipl][icl1].VtxIndex[1];
              if(vtx[ivx].nClusInPln[ipl] == 2 && fabs(dx) < 1) {
                cls[ipl][icl1].VtxIndex[1] = -2;
                cls[ipl][icl2].VtxIndex[0] = -2;
                vtx[ivx].nClusInPln[ipl] = 0;
                if(prt) mf::LogVerbatim("CCTM")<<" clobbered vertex "<<ivx;
              } // vertices match
            } // dA < 0.1 && ...
            
            // don't merge if a vertex exists at these ends
            if(cls[ipl][icl1].VtxIndex[1] >= 0) continue;
            if(cls[ipl][icl2].VtxIndex[0] >= 0) continue;
            
            // expand the angle match cut for clusters that appear to be stopping
            if(cls[ipl][icl2].Wire[0] - cls[ipl][icl1].Wire[1] < 3 &&
               (cls[ipl][icl1].Length < 3 || cls[ipl][icl2].Length < 3) ) {
              if(prt) mf::LogVerbatim("CCTM")<<"Stopping cluster";
              dACut *= 1.5;
              chgAsymCut *= 1.5;
              dXCut *= 3;
            } // stopping US cluster
            
            // find the angle made by the endpoints of the clusters
            dw = fWirePitch * (cls[ipl][icl2].Wire[0] - cls[ipl][icl1].Wire[1]);
            if(dw != 0) {
              dx = cls[ipl][icl2].X[0] - cls[ipl][icl1].X[1];
              float dA3 = std::abs(atan(dx / dw) - cls[ipl][icl1].Angle[1]);
              if(prt) mf::LogVerbatim("CCTM")<<" dA3 "<<dA3;
              if(dA3 > dA) dA = dA3;
            }
            
            // angle matching
            if(dA > dACut) continue;
            
            if(prt) mf::LogVerbatim("CCTM")<<" rough dX "<<fabs(cls[ipl][icl1].X[1] - cls[ipl][icl2].X[0])<<" cut = 20";
            
            // make a rough dX cut
            if(fabs(cls[ipl][icl1].X[1] - cls[ipl][icl2].X[0]) > 20) continue;
            
            // handle cosmic ray clusters that are broken at delta rays
            if(ls1 || ls2) {
              // tighter angle cuts but no charge cut
              if(dA > fChainVtxAng) continue;
            } else {
              chgasym = fabs(cls[ipl][icl1].Charge[1] - cls[ipl][icl2].Charge[0]);
              chgasym /= cls[ipl][icl1].Charge[1] + cls[ipl][icl2].Charge[0];
              if(prt) mf::LogVerbatim("CCTM")<<" chgasym "<<chgasym<<" cut "<<chgAsymCut;
              if(chgasym > chgAsymCut) continue;
            } // ls1 || ls2
            // project the longer cluster to the end of the shorter one
            if(cls[ipl][icl1].Length > cls[ipl][icl2].Length) {
              dw = fWirePitch * (cls[ipl][icl2].Wire[0] - cls[ipl][icl1].Wire[1]);
              dx = cls[ipl][icl1].X[1] + cls[ipl][icl1].Slope[1] * dw * fWirePitch - cls[ipl][icl2].X[0];
            } else {
              dw = fWirePitch * (cls[ipl][icl1].Wire[1] - cls[ipl][icl2].Wire[0]);
              dx = cls[ipl][icl2].X[0] + cls[ipl][icl2].Slope[0] * dw * fWirePitch - cls[ipl][icl1].X[1];
            }
            
            // handle overlapping clusters
            if(dA2 < 0.01 && abs(dx) > dXCut && dx < -1) {
              dx = dXClTraj(fmCluHits, ipl, icl1, 1, icl2);
              if(prt) mf::LogVerbatim("CCTM")<<" new dx from dXClTraj "<<dx;
            }
            
            if(prt) mf::LogVerbatim("CCTM")<<" X0 "<<cls[ipl][icl1].X[1]<<" slp "<<cls[ipl][icl1].Slope[1]<<" dw "<<dw<<" oX "<<cls[ipl][icl2].X[0]<<" dx "<<dx<<" cut "<<dXCut;
            
            if(fabs(dx) > dXCut) continue;
            
            // calculate a merge error that will be used to adjudicate between multiple merge attempts AngleFactor
            float xerr = dx / dXCut;
            float aerr = dA / dACut;
            mrgErr = xerr * xerr + aerr * aerr;
            
            if(prt) mf::LogVerbatim("CCTM")<<"icl1 mrgErr "<<mrgErr<<" MergeError "<<cls[ipl][icl1].MergeError[1]<<" icl2 MergeError "<<cls[ipl][icl2].MergeError[0];
            
            // this merge better than a previous one?
            if(mrgErr > cls[ipl][icl1].MergeError[1]) continue;
            if(mrgErr > cls[ipl][icl2].MergeError[0]) continue;
            
            // un-merge icl1 - this should always be true but check anyway
            if(cls[ipl][icl1].BrkIndex[1] >= 0) {
              unsigned short ocl = cls[ipl][icl1].BrkIndex[1];
              if(prt) mf::LogVerbatim("CCTM")<<"clobber old icl1 BrkIndex "<<ocl;
              if(cls[ipl][ocl].BrkIndex[0] == icl1) {
                cls[ipl][ocl].BrkIndex[0] = -1;
                cls[ipl][ocl].MergeError[0] = fMaxMergeError;
              }
              if(cls[ipl][ocl].BrkIndex[1] == icl1) {
                cls[ipl][ocl].BrkIndex[1] = -1;
                cls[ipl][ocl].MergeError[1] = fMaxMergeError;
              }
            } // cls[ipl][icl1].BrkIndex[1] >= 0
            cls[ipl][icl1].BrkIndex[1] = icl2;
            cls[ipl][icl1].MergeError[1] = mrgErr;
            
            // un-merge icl2
            if(cls[ipl][icl2].BrkIndex[0] >= 0) {
              unsigned short ocl = cls[ipl][icl2].BrkIndex[0];
              if(prt) mf::LogVerbatim("CCTM")<<"clobber old icl2 BrkIndex "<<ocl;
              if(cls[ipl][ocl].BrkIndex[0] == icl1) {
                cls[ipl][ocl].BrkIndex[0] = -1;
                cls[ipl][ocl].MergeError[0] = fMaxMergeError;
              }
              if(cls[ipl][ocl].BrkIndex[1] == icl1) {
                cls[ipl][ocl].BrkIndex[1] = -1;
                cls[ipl][ocl].MergeError[1] = fMaxMergeError;
              }
            } // cls[ipl][icl2].BrkIndex[0] >= 0
            cls[ipl][icl2].BrkIndex[0] = icl1;
            cls[ipl][icl2].MergeError[0] = mrgErr;
            if(prt) mf::LogVerbatim("CCTM")<<" merge "<<icl1<<" and "<<icl2;
            
          } // icl2
        } // icl1
        
        // look for broken clusters in which have a C shape similar to a Begin-Begin vertex. The clusters
        // will have large and opposite sign angles
        bool gotone;
        for(icl1 = 0; icl1 < cls[ipl].size() - 1; ++icl1) {
          gotone = false;
          for(icl2 = icl1 + 1; icl2 < cls[ipl].size(); ++icl2) {
            // check both ends
            for(unsigned short end = 0; end < 2; ++end) {
              // Ignore already identified broken clusters
              if(cls[ipl][icl1].BrkIndex[end] >= 0) continue;
              if(cls[ipl][icl2].BrkIndex[end] >= 0) continue;
//              if(prt) mf::LogVerbatim("CCTM")<<"BrokenC: clusters "<<cls[ipl][icl1].Wire[end]<<":"<<(int)cls[ipl][icl1].Time[end]<<" "<<cls[ipl][icl2].Wire[end]<<":"<<(int)cls[ipl][icl2].Time[end]<<" angles "<<cls[ipl][icl1].Angle[end]<<" "<<cls[ipl][icl2].Angle[end];
              // require a large angle cluster
              if(fabs(cls[ipl][icl1].Angle[end]) < 1) continue;
              // and a second large angle cluster
              if(fabs(cls[ipl][icl2].Angle[end]) < 1) continue;
              if(prt) mf::LogVerbatim("CCTM")<<"BrokenC: clusters "<<cls[ipl][icl1].Wire[end]<<":"<<(int)cls[ipl][icl1].Time[end]<<" "<<cls[ipl][icl2].Wire[end]<<":"<<(int)cls[ipl][icl2].Time[end]<<" angles "<<cls[ipl][icl1].Angle[end]<<" "<<cls[ipl][icl2].Angle[end]<<" dWire "<<fabs(cls[ipl][icl1].Wire[end] - cls[ipl][icl2].Wire[end]);
              if(fabs(cls[ipl][icl1].Wire[end] - cls[ipl][icl2].Wire[end]) > 5) continue;
              // This is really crude but maybe OK
              // project 1 -> 2
              float dsl = cls[ipl][icl2].Slope[end] - cls[ipl][icl1].Slope[end];
              float fvw = (cls[ipl][icl1].X[end] - cls[ipl][icl1].Wire[end] * cls[ipl][icl1].Slope[end] - cls[ipl][icl2].X[end] + cls[ipl][icl2].Wire[end] * cls[ipl][icl2].Slope[end]) / dsl;
              if(prt) mf::LogVerbatim("CCTM")<<" fvw "<<fvw;
              if(fabs(cls[ipl][icl1].Wire[end] - fvw) > 4) continue;
              if(fabs(cls[ipl][icl2].Wire[end] - fvw) > 4) continue;
              cls[ipl][icl1].BrkIndex[end] = icl2;
              // TODO This could use some improvement if necessary
              cls[ipl][icl1].MergeError[end] = 1;
              cls[ipl][icl2].BrkIndex[end] = icl1;
              cls[ipl][icl2].MergeError[end] = 1;
              gotone = true;
              dx = fabs(cls[ipl][icl1].X[end] - cls[ipl][icl2].X[end]);
              if(prt) mf::LogVerbatim("CCTM")<<"BrokenC: icl1:W "<<icl1<<":"<<cls[ipl][icl1].Wire[end]<<" icl2:W "<<icl2<<":"<<cls[ipl][icl2].Wire[end]<<" end "<<end<<" dx "<<dx;
            } // end
            if(gotone) break;
          } // icl2
        } // icl1
        
      } // cls[ipl].size() > 1
      
      // follow mother-daughter broken clusters and put them in the cluster chain array
      unsigned short end, mom, momBrkEnd, dtrBrkEnd, nit;
      short dtr;
      
      std::vector<bool> gotcl(cls[ipl].size());
      for(icl = 0; icl < cls[ipl].size(); ++icl) gotcl[icl] = false;
      if(prt) mf::LogVerbatim("CCTM")<<"ipl "<<ipl<<" cls.size() "<<cls[ipl].size()<<"\n";
      
      std::vector<unsigned short> sCluster;
      std::vector<unsigned short> sOrder;
      for(icl = 0; icl < cls[ipl].size(); ++icl) {
        sCluster.clear();
        sOrder.clear();
        if(gotcl[icl]) continue;
        // don't start with a cluster broken at both ends
        if(cls[ipl][icl].BrkIndex[0] >= 0 && cls[ipl][icl].BrkIndex[1] >= 0) continue;
        for(end = 0; end < 2; ++end) {
          if(cls[ipl][icl].BrkIndex[end] < 0) continue;
          if(cls[ipl][icl].MergeError[end] > fMergeErrorCut) continue;
          gotcl[icl] = true;
          mom = icl;
          // end where the mom is broken
          momBrkEnd = end;
          sCluster.push_back(mom);
          if(momBrkEnd == 1) {
            // typical case - broken at the DS end
            sOrder.push_back(0);
          } else {
            // broken at the US end
            sOrder.push_back(1);
          }
          dtr = cls[ipl][icl].BrkIndex[end];
//          std::cout<<"Starting mom:momBrkEnd "<<mom<<":"<<momBrkEnd<<" dtr "<<dtr<<"\n";
          nit = 0;
          while(dtr >= 0 && dtr < (short)cls[ipl].size() && nit < cls[ipl].size()) {
            // determine which end of the dtr should be attached to mom
            for(dtrBrkEnd = 0; dtrBrkEnd < 2; ++dtrBrkEnd) if(cls[ipl][dtr].BrkIndex[dtrBrkEnd] == mom) break;
            if(dtrBrkEnd == 2) {
//              mf::LogError("CCTM")<<"Cant find dtrBrkEnd for cluster "<<icl<<" dtr "<<dtr<<" in plane "<<ipl;
              gotcl[icl] = false;
              break;
            }
            // check for reasonable merge error
            if(cls[ipl][dtr].MergeError[dtrBrkEnd] < fMergeErrorCut) {
              sCluster.push_back(dtr);
              sOrder.push_back(dtrBrkEnd);
              gotcl[dtr] = true;
            }
//            std::cout<<" dtr:dtrBrkEnd "<<dtr<<":"<<dtrBrkEnd<<" momBrkEnd "<<momBrkEnd<<"\n";
            ++nit;
            // set up to check the new mom
            mom = dtr;
            // at the other end
            momBrkEnd = 1 - dtrBrkEnd;
            // with the new dtr
            dtr = cls[ipl][mom].BrkIndex[momBrkEnd];
//            std::cout<<" new mom:momBrkEnd "<<mom<<":"<<momBrkEnd<<" new dtr "<<dtr<<"\n";
          } // dtr >= 0 ...
          if(dtrBrkEnd == 2) continue;
        } // end
        
        if(!gotcl[icl]) {
          // a single unbroken cluster
          sCluster.push_back(icl);
          sOrder.push_back(0);
        }
        
        if(sCluster.size() == 0) {
          mf::LogError("CCTM")<<"MakeClusterChains error in plane "<<ipl<<" cluster "<<icl;
          return;
        }
/*
         std::cout<<ipl<<" icl "<<icl<<" sCluster ";
         for(unsigned short ii = 0; ii < sCluster.size(); ++ii) std::cout<<" "<<sCluster[ii]<<":"<<sOrder[ii];
         std::cout<<"\n";
*/
        ClsChainPar ccp;
        // fill the struct parameters assuming this is a cluster chain containing only one cluster
        unsigned short jcl = sCluster[0];
        if(jcl > cls[ipl].size()) std::cout<<"oops MCC\n";
        unsigned short oend;
        for(end = 0; end < 2; ++end) {
          oend = end;
          if(sOrder[0] > 0) oend = 1 - end;
          ccp.Wire[end] = cls[ipl][jcl].Wire[oend];
          ccp.Time[end] = cls[ipl][jcl].Time[oend];
          ccp.X[end] = cls[ipl][jcl].X[oend];
          ccp.Slope[end] = cls[ipl][jcl].Slope[oend];
          ccp.Angle[end] = cls[ipl][jcl].Angle[oend];
          ccp.Dir[end] = cls[ipl][icl].Dir[oend];
          ccp.VtxIndex[end] = cls[ipl][jcl].VtxIndex[oend];
          ccp.ChgNear[end] = cls[ipl][jcl].ChgNear[oend];
          ccp.mBrkIndex[end] = cls[ipl][jcl].BrkIndex[oend];
        } // end
        ccp.Length = cls[ipl][icl].Length;
        ccp.TotChg = cls[ipl][icl].TotChg;
        ccp.InTrack = -1;
//        std::cout<<"sOrder0 "<<sOrder[0]<<" "<<(int)ccp.Wire[0]<<":"<<(int)ccp.Time[0]<<" dir "<<ccp.Dir[0]<<" "<<(int)ccp.Wire[1]<<":"<<(int)ccp.Time[1]<<" dir "<<ccp.Dir[1]<<"\n";
        
        for(unsigned short ii = 1; ii < sCluster.size(); ++ii) {
          jcl = sCluster[ii];
          if(jcl > cls[ipl].size()) std::cout<<"oops MCC\n";
          // end is the end where the break is being mended
          end = sOrder[ii];
          if(end > 1) std::cout<<"oops2 MCC\n";
          oend = 1 - end;
          // update the parameters at the other end of the chain
          ccp.Wire[1] = cls[ipl][jcl].Wire[oend];
          ccp.Time[1] = cls[ipl][jcl].Time[oend];
          ccp.X[1] = cls[ipl][jcl].X[oend];
          ccp.Slope[1] = cls[ipl][jcl].Slope[oend];
          ccp.Angle[1] = cls[ipl][jcl].Angle[oend];
          ccp.Dir[1] = cls[ipl][jcl].Dir[oend];
          ccp.VtxIndex[1] = cls[ipl][jcl].VtxIndex[oend];
          ccp.ChgNear[1] = cls[ipl][jcl].ChgNear[oend];
          ccp.mBrkIndex[1] = cls[ipl][jcl].BrkIndex[oend];
          ccp.Length += cls[ipl][jcl].Length;
          ccp.TotChg += cls[ipl][jcl].TotChg;
//          std::cout<<"Update  "<<end<<" "<<(int)ccp.Wire[0]<<":"<<(int)ccp.Time[0]<<" dir "<<ccp.Dir[0]<<" "<<(int)ccp.Wire[1]<<":"<<(int)ccp.Time[1]<<" dir "<<ccp.Dir[1]<<"\n";
        } // ii
        ccp.ClsIndex = sCluster;
        ccp.Order = sOrder;
        // redo the direction
        if(ccp.Time[1] > ccp.Time[0]) {
          ccp.Dir[0] = 1; ccp.Dir[1] = -1;
        } else {
          ccp.Dir[0] = -1; ccp.Dir[1] = 1;
        }
        clsChain[ipl].push_back(ccp);
        
      } // icl
      
      // re-index mBrkIndex to point to a cluster chain, not a cluster
      unsigned short brkCls;
      bool gotit;
      for(unsigned short ccl = 0; ccl < clsChain[ipl].size(); ++ccl) {
        for(unsigned short end = 0; end < 2; ++end) {
          if(clsChain[ipl][ccl].mBrkIndex[end] < 0) continue;
          brkCls = clsChain[ipl][ccl].mBrkIndex[end];
          gotit = false;
          // find this cluster index in a cluster chain
          for(unsigned short ccl2 = 0; ccl2 < clsChain[ipl].size(); ++ccl2) {
            if(ccl2 == ccl) continue;
            if(std::find(clsChain[ipl][ccl2].ClsIndex.begin(), clsChain[ipl][ccl2].ClsIndex.end(), brkCls) == clsChain[ipl][ccl2].ClsIndex.end()) continue;
            // found it
            clsChain[ipl][ccl].mBrkIndex[end] = ccl2;
            gotit = true;
            break;
          } // ccl2
//          if(gotit) std::cout<<"gotit ccl "<<ccl<<" end "<<end<<" new mBrkIndex "<<clsChain[ipl][ccl].mBrkIndex[end]<<"\n";
          if(!gotit) mf::LogError("CCTM")<<"MCC: Cluster chain "<<ccl<<" end "<<end<<" Failed to find brkCls "<<brkCls<<" in plane "<<ipl;
        } // end
      } // ccl

    } // ipl
    
    
    if(gotprt) PrintClusters();
    prt = false;
    
  } // MakeClusterChains
  
  float CCTrackMaker::dXClTraj(art::FindManyP<recob::Hit> const& fmCluHits, unsigned short ipl, unsigned short icl1, unsigned short end1, unsigned short icl2)
  {
    // project cluster icl1 at end1 to find the best intersection with icl2
    float dw, dx, best = 999;
    std::vector<art::Ptr<recob::Hit>> clusterhits = fmCluHits.at(cls[ipl][icl1].EvtIndex);
    for(unsigned short hit = 0; hit < clusterhits.size(); ++hit) {
      dw = clusterhits[hit]->WireID().Wire - cls[ipl][icl1].Wire[end1];
      dx = fabs(cls[ipl][icl1].Time[end1] + dw * fWirePitch * cls[ipl][icl1].Slope[end1] - clusterhits[hit]->PeakTime());
      if(dx < best) best = dx;
      if(dx < 0.01) break;
    } // hit
    return best;
  } // dXClTraj
  
  void CCTrackMaker::StoreTrack(art::FindManyP<recob::Hit> const& fmCluHits,
                                unsigned short imat, unsigned short procCode)
  {
    // store the current "under construction" track in the trk vector
    
    TrkPar newtrk;
    
    if(imat > matcomb.size() - 1) {
      mf::LogError("CCTM")<<"Bad imat in StoreTrack";
      return;
    }
    
    // ensure there are at least 2 hits in at least 2 planes
    unsigned short nhitinpl = 0;
    for(unsigned short ipl = 0; ipl < nplanes; ++ipl) if(trkHits[ipl].size() > 1) ++nhitinpl;
    if(nhitinpl < 2) {
      mf::LogError("CCTM")<<"StoreTrack: Not enough hits in each plane\n";
      return;
    }
    if(prt) mf::LogVerbatim("CCTM")<<"In StoreTrack: matcomb "<<imat<<" cluster chains "<<matcomb[imat].Cls[0]<<" "<<matcomb[imat].Cls[1]<<" "<<matcomb[imat].Cls[2];
    
    // Track hit vectors for fitting the trajectory
    std::array<std::vector<geo::WireID>,3> trkWID;
    std::array<std::vector<double>,3> trkX;
    std::array<std::vector<double>,3> trkXErr;
    
    // track trajectory for a track
    std::vector<TVector3> trkPos;
    std::vector<TVector3> trkDir;
    
    newtrk.ID = trk.size() + 1;
    newtrk.Proc = procCode;
    newtrk.TrkHits = trkHits;
    // BUG the double brace syntax is required to work around clang bug 21629
    // (https://bugs.llvm.org/show_bug.cgi?id=21629)
    newtrk.VtxIndex = {{-1, -1}};
    newtrk.ChgOrder = 0;
    newtrk.MomID = -1;
    // BUG the double brace syntax is required to work around clang bug 21629
    // (https://bugs.llvm.org/show_bug.cgi?id=21629)
    newtrk.EndInTPC = {{false, false}};
    newtrk.GoodEnd = {{false, false}};
    newtrk.DtrID = {0};
    newtrk.PDGCode = -1;
    
    unsigned short ipl, icl, iht;
    
    if(prt) mf::LogVerbatim("CCTM")<<"CCTM: Make traj for track "<<newtrk.ID<<" procCode "<<procCode<<" nhits in planes "<<trkHits[0].size()<<" "<<trkHits[1].size()<<" "<<trkHits[2].size();
    // make the track trajectory
    if(nplanes == 2) {
      trkWID[2].resize(0);
      trkX[2].resize(0);
      trkXErr[2].resize(0);
    }
    for(ipl = 0; ipl < nplanes; ++ipl) {
      trkWID[ipl].resize(trkHits[ipl].size());
      trkX[ipl].resize(trkHits[ipl].size());
      trkXErr[ipl].resize(trkHits[ipl].size());
      for(iht = 0; iht < trkHits[ipl].size(); ++iht) {
        trkWID[ipl][iht] = trkHits[ipl][iht]->WireID();
        trkX[ipl][iht] = detprop->ConvertTicksToX(trkHits[ipl][iht]->PeakTime(),ipl, tpc, cstat);
        trkXErr[ipl][iht] = fHitFitErrFac * trkHits[ipl][iht]->RMS() * trkHits[ipl][iht]->Multiplicity();
//        std::cout<<iht<<" "<<trkWID[ipl][iht]<<" "<<trkX[ipl][iht]<<" "<<trkXErr[ipl][iht]<<"\n";
      } // iht
    } // ipl
    fTrackTrajectoryAlg.TrackTrajectory(trkWID, trkX, trkXErr, trkPos, trkDir);
    if(trkPos.size() < 2) {
      mf::LogError("CCTM")<<"StoreTrack: No trajectory points on failed track "<<newtrk.ID
      <<" in StoreTrack: matcomb "<<imat<<" cluster chains "<<matcomb[imat].Cls[0]<<" "<<matcomb[imat].Cls[1]<<" "<<matcomb[imat].Cls[2];
      // make a garbage trajectory
      trkPos.resize(2);
      trkPos[1](2) = 1;
      trkDir.resize(2);
      trkDir[1](2) = 1;
    }
    newtrk.TrjPos = trkPos;
    newtrk.TrjDir = trkDir;
    
    if(prt) mf::LogVerbatim("CCTM")<<" number of traj points "<<trkPos.size();

    // determine if each end is good in the sense that there are hits in each plane
    // that are consistent in time and are presumed to form a good 3D space point
    unsigned short end, nClose, indx, jndx;
    float xErr;
    for(end = 0; end < 2; ++end) {
      nClose = 0;
      for(ipl = 0; ipl < nplanes - 1; ++ipl) {
        if(trkX[ipl].size() == 0) continue;
        for(unsigned short jpl = ipl + 1; jpl < nplanes; ++jpl) {
          if(trkX[jpl].size() == 0) continue;
          if(end == 0) {
            indx = 0;
            jndx = 0;
          } else {
            indx = trkXErr[ipl].size() - 1;
            jndx = trkXErr[jpl].size() - 1;
          }
          xErr = 3 * (trkXErr[ipl][indx] + trkXErr[jpl][jndx]);
          if(std::abs(trkX[ipl][indx] - trkX[jpl][jndx]) <  xErr) ++nClose;
        } // jpl
      } // ipl
      if(nClose == nplanes) newtrk.GoodEnd[end] = true;
    } // end
    
    // set trajectory end points to a vertex if one exists
    unsigned short ivx, itj, ccl;
    float dx, dy, dz, dr0, dr1;
    unsigned short attachEnd;
    for(end = 0; end < 2; ++end) {
      ivx = USHRT_MAX;
      if(end == 0 && matcomb[imat].Vtx >= 0) ivx = matcomb[imat].Vtx;
      if(end == 1 && matcomb[imat].oVtx >= 0) ivx = matcomb[imat].oVtx;
      if(ivx == USHRT_MAX) continue;
      // determine the proper end using the TrjPos order and brute force
      itj = 0;
      dx = vtx[ivx].X - newtrk.TrjPos[itj](0);
      dy = vtx[ivx].Y - newtrk.TrjPos[itj](1);
      dz = vtx[ivx].Z - newtrk.TrjPos[itj](2);
      dr0 = dx*dx + dy*dy + dz*dz;
      itj = newtrk.TrjPos.size() - 1;
      dx = vtx[ivx].X - newtrk.TrjPos[itj](0);
      dy = vtx[ivx].Y - newtrk.TrjPos[itj](1);
      dz = vtx[ivx].Z - newtrk.TrjPos[itj](2);
      dr1 = dx*dx + dy*dy + dz*dz;
      attachEnd = 1;
      if(dr0 < dr1) {
        itj = 0;
        attachEnd = 0;
        // a really bad match to the vertex
        if(dr0 > 5) return;
      } else {
        // a really bad match to the vertex
        if(dr1 > 5) return;
      }
      newtrk.TrjPos[itj](0) = vtx[ivx].X;
      newtrk.TrjPos[itj](1) = vtx[ivx].Y;
      newtrk.TrjPos[itj](2) = vtx[ivx].Z;
      newtrk.VtxIndex[attachEnd] = ivx;
      // correct the trajectory direction
      TVector3 dir;
      if(itj == 0) {
        dir = newtrk.TrjPos[1] - newtrk.TrjPos[0];
        newtrk.TrjDir[0] = dir.Unit();
      } else {
        dir = newtrk.TrjPos[itj - 1] - newtrk.TrjPos[itj];
        newtrk.TrjDir[itj] = dir.Unit();
      }
    } // end
    
    if(newtrk.VtxIndex[0] >= 0 && newtrk.VtxIndex[0] == newtrk.VtxIndex[1]) {
      mf::LogError("CCTM")<<"StoreTrack: Trying to attach a vertex to both ends of a track. imat = "<<imat;
      return;
    }

    // calculate the length
    newtrk.Length = 0;
    float norm;
    double X, Y, Z;
    for(unsigned short itj = 1; itj < newtrk.TrjPos.size(); ++itj) {
      X = newtrk.TrjPos[itj](0) - newtrk.TrjPos[itj-1](0);
      Y = newtrk.TrjPos[itj](1) - newtrk.TrjPos[itj-1](1);
      Z = newtrk.TrjPos[itj](2) - newtrk.TrjPos[itj-1](2);
      norm = sqrt(X*X + Y*Y + Z*Z);
      newtrk.Length += norm;
    }
    
    // store the cluster -> track assignment
    newtrk.ClsEvtIndices.clear();
    for(ipl = 0; ipl < nplanes; ++ipl) {
      if(matcomb[imat].Cls[ipl] < 0) continue;
      ccl = matcomb[imat].Cls[ipl];
      if(ccl > clsChain[ipl].size()) std::cout<<"oops StoreTrack\n";
      clsChain[ipl][ccl].InTrack = newtrk.ID;
      for(unsigned short icc = 0; icc < clsChain[ipl][ccl].ClsIndex.size(); ++icc) {
        icl = clsChain[ipl][ccl].ClsIndex[icc];
        if(icl > cls[ipl].size()) std::cout<<"oops StoreTrack\n";
        cls[ipl][icl].InTrack = newtrk.ID;
        if(cls[ipl][icl].EvtIndex > fmCluHits.size() - 1) {
          std::cout<<"ooops2 store track EvtIndex "<<cls[ipl][icl].EvtIndex<<" size "<<fmCluHits.size()<<" icl "<<icl<<"\n";
          continue;
        }
        newtrk.ClsEvtIndices.push_back(cls[ipl][icl].EvtIndex);
      } // icc
    } // ipl
    
  if(prt) mf::LogVerbatim("CCTM")<<" track ID "<<newtrk.ID<<" stored in StoreTrack";
    
    trk.push_back(newtrk);
  } // StoreTrack
/*
  void CCTrackMaker::AngMatch(art::FindManyP<recob::Hit> const& fmCluHits)
  {
    // look for long unused cluster chains and match them using angle
    std::array<std::vector<unsigned short>, 3> ccUnused;
    
    unsigned short ipl, icc, jpl, kpl, ii, jj, kk, icl, jcl, kcl, iend, jend, kend;
    short idir, jdir, kdir;
    float islp = 0, jslp = 0, kslp = 0, kAng = 0, sigmaA = 0, matchErr = 0;
    
    prt = (fDebugPlane >= 0);
    
    for(ipl = 0; ipl < nplanes; ++ipl) {
      for(icc = 0; icc < clsChain[ipl].size(); ++icc) {
        if(clsChain[ipl][icc].InTrack < 0 && clsChain[ipl][icc].Length > fAngMatchMinLen) ccUnused[ipl].push_back(icc);
      } // icc
      if(prt) {
        mf::LogVerbatim myprt("CCTM");
        myprt<<"AngMatch: ipl "<<ipl<<" ccUnused";
        for(icc = 0; icc < ccUnused[ipl].size(); ++icc) myprt<<" "<<ccUnused[ipl][icc];;
      }
    } // ipl
    
    
    if(ccUnused[0].size() == 0 && ccUnused[1].size() == 0 && ccUnused[2].size() == 0) return;
    
    std::array<float, 3> mchg;
    matcomb.clear();
    
    float xMatchWght = 1;
    if(fuBCode) xMatchWght = 0.1;
    
    for(ipl = 0; ipl < nplanes; ++ipl) {
      jpl = (ipl + 1) % nplanes;
      kpl = (jpl + 1) % nplanes;
      for(ii = 0; ii < ccUnused[ipl].size(); ++ii) {
        icl = ccUnused[ipl][ii];
        prt = (ipl == fDebugPlane && icl == fDebugCluster);
        for(jj = 0; jj < ccUnused[jpl].size(); ++jj) {
          jcl = ccUnused[jpl][jj];
          // make first charge asymmetry cut
          mchg[0] = clsChain[ipl][icl].TotChg;
          mchg[1] = clsChain[jpl][jcl].TotChg;
          mchg[2] = mchg[1];
          if(prt) mf::LogVerbatim("CCTM")<<"AngMatch: ipl:icl "<<ipl<<":"<<icl<<" jpl:jcl "<<jpl<<":"<<jcl<<" chg asym"<<ChargeAsym(mchg);
          if(ChargeAsym(mchg) > 0.5) continue;
          kslp = geom->ThirdPlaneSlope(ipl, islp, jpl, jslp, tpc, cstat);
          for(kk = 0; kk < ccUnused[kpl].size(); ++kk) {
            kcl = ccUnused[kpl][kk];
            // make second charge asymmetry cut
            mchg[0] = clsChain[ipl][icl].TotChg;
            mchg[1] = clsChain[jpl][jcl].TotChg;
            mchg[2] = clsChain[kpl][kcl].TotChg;
            if(!fuBCode && ChargeAsym(mchg) > 0.5) continue;
            // check the ends
            for(iend = 0; iend < 2; ++iend) {
              idir = clsChain[ipl][icl].Dir[iend];
              islp = clsChain[ipl][icl].Slope[iend];
              for(jend = 0; jend < 2; ++jend) {
                jdir = clsChain[jpl][jcl].Dir[jend];
                if(idir != 0 && jdir != 0 && idir != jdir) continue;
                jslp = clsChain[jpl][jcl].Slope[jend];
                // expected angle in kpl
                kslp = geom->ThirdPlaneSlope(ipl, islp, jpl, jslp, tpc, cstat);
                kAng = atan(kslp);
                sigmaA = fAngleMatchErr * AngleFactor(kslp);
                for(kend = 0; kend < 2; ++kend) {
                  kdir = clsChain[kpl][kcl].Dir[kend];
                  if(idir != 0 && kdir != 0 && idir != kdir) continue;
                  matchErr = fabs(clsChain[kpl][kcl].Angle[kend] - kAng) / sigmaA;
                  if(prt) mf::LogVerbatim("CCTM")<<" ipl:icl:iend "<<ipl<<":"<<icl<<":"<<iend<<" jpl:jcl:jend "<<jpl<<":"<<jcl<<":"<<jend<<" kpl:kcl:kend "<<kpl<<":"<<kcl<<":"<<kend<<" matchErr "<<matchErr;
                  if(matchErr > 5) continue;
                  MatchPars match;
                  match.Cls[ipl] = icl; match.End[ipl] = iend;
                  match.Cls[jpl] = jcl; match.End[jpl] = jend;
                  match.Cls[kpl] = kcl; match.End[kpl] = kend;
                  if(DupMatch(match)) continue;
                  match.Chg[ipl] = clsChain[ipl][icl].TotChg;
                  match.Chg[jpl] = clsChain[jpl][jcl].TotChg;
                  match.Chg[kpl] = clsChain[kpl][kcl].TotChg;
                  match.Vtx = -1;
                  match.dWir = fabs(0.5 * (clsChain[ipl][icl].Wire[iend] + clsChain[jpl][jcl].Wire[jend]) - clsChain[kpl][kcl].Wire[kend]);
                  match.dAng = fabs(clsChain[kpl][kcl].Angle[kend] - kAng);
                  match.dX = xMatchWght * fabs(0.5 * (clsChain[ipl][icl].X[iend] + clsChain[jpl][jcl].X[jend]) - clsChain[kpl][kcl].X[kend]);
                  if(prt) mf::LogVerbatim("CCTM")<<" match.dX "<<match.dX;
                  if(!fuBCode && match.dX > 20) continue;
                  if(std::abs(kAng) > 0.3 && match.dAng < 0.03) std::cout<<"match "<<ipl<<":"<<icl<<" "<<jpl<<":"<<jcl<<" "<<kpl<<":"<<kcl<<" "<<match.dAng<<"\n";
                  // add X match error with 1 cm rms
//                  match.Err = matchErr + match.dX;
                  match.Err = 0.;
                  match.oVtx = -1;
                  match.odWir = 0;
                  match.odAng = 0;
                  match.odX = 0;
                  match.oErr = 0;
                  matcomb.push_back(match);
                } // kend
               } // jend
            } // iend
          } // kk
        } // jj
      } // ii
    } // ipl
    
    if(matcomb.size() == 0) return;
    
    SortMatches(fmCluHits, 3);
    
    prt = false;
  } // AngMatch
*/
  void CCTrackMaker::PlnMatch(art::FindManyP<recob::Hit> const& fmCluHits)
  {
    // Match clusters in all planes
    //    unsigned short ipl, icl, jpl, jcl, kpl, kcl;
    bool ignoreSign;
    float kSlp, kAng, kX, kWir, okWir;
    short idir, ioend, jdir, joend, kdir;
    
    double yp, zp;
    float tpcSizeY = geom->DetHalfWidth();
    float tpcSizeZ = geom->DetLength();
    
    
    float dxcut = 2;
    float dxkcut;
    float dwcut = 6;
    if(fuBCode) {
      dxcut = 20;
      dwcut = 60;
    }
    
    // temp array for making a rough charge asymmetry cut
    std::array<float, 3> mchg;
    
    for(unsigned short ipl = 0; ipl < nplanes; ++ipl) {
      for(unsigned short icl = 0; icl < clsChain[ipl].size(); ++icl) {
        if(clsChain[ipl][icl].InTrack >= 0) continue;
        // skip short clusters
        if(clsChain[ipl][icl].Length < fMatchMinLen[algIndex]) continue;
        unsigned short jpl = (ipl + 1) % nplanes;
        unsigned short kpl = (jpl + 1) % nplanes;
        for(unsigned short jcl = 0; jcl < clsChain[jpl].size(); ++jcl) {
          if(clsChain[jpl][jcl].InTrack >= 0) continue;
          // skip short clusters
          if(clsChain[jpl][jcl].Length < fMatchMinLen[algIndex]) continue;
          // make first charge asymmetry cut
          mchg[0] = clsChain[ipl][icl].TotChg;
          mchg[1] = clsChain[jpl][jcl].TotChg;
          mchg[2] = mchg[1];
          if(fChgAsymFactor[algIndex] > 0 && ChargeAsym(mchg) > 0.5) continue;
          for(unsigned short iend = 0; iend < 2; ++iend) {
            idir = clsChain[ipl][icl].Dir[iend];
            for(unsigned short jend = 0; jend < 2; ++jend) {
              jdir = clsChain[jpl][jcl].Dir[jend];
              if(idir != 0 && jdir != 0 && idir != jdir) continue;
              // make an X cut
              if(fabs(clsChain[ipl][icl].X[iend] - clsChain[jpl][jcl].X[jend]) > dxcut) continue;
              ioend = 1 - iend; joend = 1 - jend;
              // Find the expected third (k) plane parameters
              kSlp = geom->ThirdPlaneSlope(ipl, clsChain[ipl][icl].Slope[iend], jpl, clsChain[jpl][jcl].Slope[jend], tpc, cstat);
              kAng = atan(kSlp);
              // Ensure the match end is within the TPC
              geom->IntersectionPoint((unsigned int)(0.5+clsChain[ipl][icl].Wire[iend]),
                                      (unsigned int)(0.5+clsChain[jpl][jcl].Wire[jend]),
                                      ipl, jpl, cstat, tpc, yp, zp);
              if(yp > tpcSizeY || yp < -tpcSizeY) continue;
              if(zp < 0 || zp > tpcSizeZ) continue;
              kX = 0.5 * (clsChain[ipl][icl].X[iend] + clsChain[jpl][jcl].X[jend]);
              kWir = geom->WireCoordinate(yp, zp, kpl, tpc, cstat);
              // now look at the other end
              geom->IntersectionPoint((unsigned int)(0.5+clsChain[ipl][icl].Wire[ioend]),
                                      (unsigned int)(0.5+clsChain[jpl][jcl].Wire[joend]),
                                      ipl, jpl, cstat, tpc, yp, zp);
              if(yp > tpcSizeY || yp < -tpcSizeY) continue;
              if(zp < 0 || zp > tpcSizeZ) continue;
              okWir = geom->WireCoordinate(yp, zp, kpl, tpc, cstat);
              if(prt) mf::LogVerbatim("CCTM")<<"PlnMatch: chk i "<<ipl<<":"<<icl<<":"<<iend
                <<" idir "<<idir<<" X "<<clsChain[ipl][icl].X[iend]<<" j "<<jpl<<":"<<jcl<<":"<<jend
                <<" jdir "<<jdir<<" X "<<clsChain[jpl][jcl].X[jend];
              
              if(prt) mf::LogVerbatim("CCTM")<<"PlnMatch: chk j "<<ipl<<":"<<icl<<":"<<iend
                <<" "<<jpl<<":"<<jcl<<":"<<jend<<" iSlp "<<std::setprecision(2)<<clsChain[ipl][icl].Slope[iend]
                <<" jSlp "<<std::setprecision(2)<<clsChain[jpl][jcl].Slope[jend]<<" kWir "<<(int)kWir
                <<" okWir "<<(int)okWir<<" kSlp "<<std::setprecision(2)<<kSlp<<" kAng "
                <<std::setprecision(2)<<kAng<<" kX "<<std::setprecision(1)<<kX;
              
              // handle the case near pi/2, where the errors on large slopes
              // could result in a wrong-sign kAng
              ignoreSign = (fabs(kSlp) > 1.5);
              if(ignoreSign) kAng = fabs(kAng);
              dxkcut = dxcut * AngleFactor(kSlp);
              bool gotkcl = false;
              for(unsigned short kcl = 0; kcl < clsChain[kpl].size(); ++kcl) {
                if(clsChain[kpl][kcl].InTrack >= 0) continue;
                // make second charge asymmetry cut
                mchg[0] = clsChain[ipl][icl].TotChg;
                mchg[1] = clsChain[jpl][jcl].TotChg;
                mchg[2] = clsChain[kpl][kcl].TotChg;
                if(fChgAsymFactor[algIndex] > 0 && ChargeAsym(mchg) > 0.5) continue;
                for(unsigned short kend = 0; kend < 2; ++kend) {
                  kdir = clsChain[kpl][kcl].Dir[kend];
                  if(idir != 0 && kdir != 0 && idir != kdir) continue;
                  if(prt) mf::LogVerbatim("CCTM")<<" kcl "<<kcl<<" kend "<<kend
                    <<" dx "<<std::abs(clsChain[kpl][kcl].X[kend] - kX)<<" dxkcut "<<dxkcut;
                  if(std::abs(clsChain[kpl][kcl].X[kend] - kX) > dxkcut) continue;
                  // rough dWire cut
                  if(prt) mf::LogVerbatim("CCTM")<<" kcl "<<kcl<<" kend "<<kend
                    <<" dw "<<(clsChain[kpl][kcl].Wire[kend] - kWir)<<" ignoreSign "<<ignoreSign;
                  if(fabs(clsChain[kpl][kcl].Wire[kend] - kWir) > dwcut) continue;
                  if(prt) mf::LogVerbatim("CCTM")<<" chk k "<<kpl<<":"<<kcl<<":"<<kend;
                  MatchPars match;
                  match.Cls[ipl] = icl; match.End[ipl] = iend;
                  match.Cls[jpl] = jcl; match.End[jpl] = jend;
                  match.Cls[kpl] = kcl; match.End[kpl] = kend;
                  match.Err = 100;
                  if(DupMatch(match)) continue;
                  match.Chg[ipl] =   0; match.Chg[jpl] =   0; match.Chg[kpl] = 0;
                  match.Vtx = clsChain[ipl][icl].VtxIndex[iend];
                  match.oVtx = -1;
                  FillEndMatch(match);
                  if(prt) mf::LogVerbatim("CCTM")<<" PlnMatch: match k "<<kpl<<":"<<match.Cls[kpl]
                    <<":"<<match.End[kpl]<<" oChg "<<match.Chg[kpl]<<" mErr "<<match.Err<<" oErr "<<match.oErr;
                  if(match.Chg[kpl] == 0) continue;
                  if(match.Err > 10 || match.oErr > 10) continue;
                  if(prt) mf::LogVerbatim("CCTM")<<" dup? ";
                  if(DupMatch(match)) continue;
                  matcomb.push_back(match);
                  gotkcl = true;
                } // kend
              } // kcl
              if(prt) mf::LogVerbatim("CCTM")<<" PlnMatch: gotkcl "<<gotkcl;
              if(!gotkcl) {
                // make a 2-plane match and try again
                MatchPars match;
                match.Cls[ipl] = icl; match.End[ipl] = iend;
                match.Cls[jpl] = jcl; match.End[jpl] = jend;
                match.Cls[kpl] =  -1; match.End[kpl] = 0;
                match.Err = 100;
                if(DupMatch(match)) continue;
                match.Chg[ipl] = 0; match.Chg[jpl] = 0; match.Chg[kpl] = 0;
                match.Vtx = clsChain[ipl][icl].VtxIndex[iend];
                match.oVtx = -1;
                FillEndMatch(match);
                if(prt) mf::LogVerbatim("CCTM")<<" Tried 2-plane match"<<" k "<<kpl<<":"<<match.Cls[kpl]
                  <<":"<<match.End[kpl]<<" Chg "<<match.Chg[kpl]<<" Err "<<match.Err<<" match.oErr "<<match.oErr;
                if(match.Chg[kpl] <= 0) continue;
                if(match.Err > 10 || match.oErr > 10) continue;
                matcomb.push_back(match);
              } // !gotkcl
            } // jend
          } // iend
        } // jcl
      } // icl
    } // ipl
    
    if(matcomb.size() == 0) return;
    
  } // PlnMatch
  
  bool CCTrackMaker::DupMatch(MatchPars& match)
  {
    
    unsigned short nMatCl, nMiss;
    float toterr = match.Err + match.oErr;
    for(unsigned int imat = 0; imat < matcomb.size(); ++imat) {
      // check for exact matches
      if(match.Cls[0] == matcomb[imat].Cls[0] &&
         match.Cls[1] == matcomb[imat].Cls[1] &&
         match.Cls[2] == matcomb[imat].Cls[2]) {
        
        // compare the error
        if(toterr < matcomb[imat].Err + matcomb[imat].oErr) {
          // keep the better one
          matcomb[imat].End[0] = match.End[0];
          matcomb[imat].End[1] = match.End[1];
          matcomb[imat].End[2] = match.End[2];
          matcomb[imat].Vtx = match.Vtx;
          matcomb[imat].dWir = match.dWir;
          matcomb[imat].dAng = match.dAng;
          matcomb[imat].dX = match.dX;
          matcomb[imat].Err = match.Err;
          matcomb[imat].oVtx = match.oVtx;
          matcomb[imat].odWir = match.odWir;
          matcomb[imat].odAng = match.odAng;
          matcomb[imat].odX = match.odX;
          matcomb[imat].oErr = match.oErr;
        }
        return true;
      } // test
      // check for a 3-plane match vs 2-plane match
      nMatCl = 0;
      nMiss = 0;
      for(unsigned short ipl = 0; ipl < nplanes; ++ipl) {
        if(match.Cls[ipl] >= 0) {
          if(match.Cls[ipl] == matcomb[imat].Cls[ipl] && (match.End[0] == matcomb[imat].End[0] || match.End[1] == matcomb[imat].End[1])) ++nMatCl;
        } else {
          ++nMiss;
        }
      } // ipl
      if(nMatCl == 2 && nMiss == 1) return true;
    } // imat
    return false;
  } // DupMatch
  
  void CCTrackMaker::SortMatches(art::FindManyP<recob::Hit> const& fmCluHits, unsigned short procCode)
  {
    // sort cluster matches by increasing total match error. Find the minimum total error of all
    // cluster match combinations and make tracks from them
    CluLen merr;
    std::vector<CluLen> materr;
    unsigned int ii, im;
    
    if(matcomb.size() == 0) return;
    
    // sort by decreasing error
    for(ii = 0; ii < matcomb.size(); ++ii) {
      merr.index = ii;
      merr.length = matcomb[ii].Err + matcomb[ii].oErr;
      materr.push_back(merr);
    } // ii
    std::sort(materr.begin(), materr.end(), lessThan);
    
    if(prt) {
      mf::LogVerbatim myprt("CCTM");
      myprt<<"SortMatches\n";
      myprt<<"   ii    im  Vx   Err     dW     dA     dX  oVx   oErr    odW   odA    odX   Asym   icl   jcl   kcl \n";
      for(ii = 0; ii < materr.size(); ++ii) {
        im = materr[ii].index;
        float asym = fabs(matcomb[im].Chg[0] - matcomb[im].Chg[1]) /
        (matcomb[im].Chg[0] + matcomb[im].Chg[1]);
        asym *= fabs(matcomb[im].Chg[1] - matcomb[im].Chg[2]) /
        (matcomb[im].Chg[1] + matcomb[im].Chg[2]);
        myprt<<std::fixed<<std::right
        <<std::setw(5)<<ii<<std::setw(5)<<im
        <<std::setw(4)<<matcomb[im].Vtx
        <<std::setw(7)<<std::setprecision(2)<<matcomb[im].Err
        <<std::setw(7)<<std::setprecision(1)<<matcomb[im].dWir
        <<std::setw(7)<<std::setprecision(2)<<matcomb[im].dAng
        <<std::setw(7)<<std::setprecision(2)<<matcomb[im].dX
        <<std::setw(4)<<matcomb[im].oVtx
        <<std::setw(7)<<std::setprecision(2)<<matcomb[im].oErr
        <<std::setw(7)<<std::setprecision(1)<<matcomb[im].odWir
        <<std::setw(7)<<std::setprecision(2)<<matcomb[im].odAng
        <<std::setw(7)<<std::setprecision(2)<<matcomb[im].odX
        <<std::setw(7)<<std::setprecision(3)<<asym
        <<" 0:"<<matcomb[im].Cls[0]<<":"<<matcomb[im].End[0]
        <<" 1:"<<matcomb[im].Cls[1]<<":"<<matcomb[im].End[1];
        if(nplanes > 2) myprt<<" 2:"<<matcomb[im].Cls[2]<<":"<<matcomb[im].End[2];
        myprt<<"\n";
      } // ii
    } // prt
    
    // define an array to ensure clusters are only used once
    std::array<std::vector<bool>, 3> pclUsed;
    unsigned short ipl;
    for(ipl = 0; ipl < nplanes; ++ipl) {
      pclUsed[ipl].resize(clsChain[ipl].size());
//      std::fill(pclUsed[ipl].begin(), pclUsed[ipl].end(), false);
    }
    
    // count the total number of clusters and length used in matcomb
    unsigned short matcombTotCl = 0;
    float matcombTotLen = 0;
    unsigned short icl;
    for(ii = 0; ii < matcomb.size(); ++ii) {
      for(ipl = 0; ipl < nplanes; ++ipl) {
        if(matcomb[ii].Cls[ipl] < 0) continue;
        icl = matcomb[ii].Cls[ipl];
        ++matcombTotCl;
        matcombTotLen += clsChain[ipl][icl].Length;
      }
    }
    
    if(prt) mf::LogVerbatim("CCTM")<<"Number of clusters to match "<<matcombTotCl <<" total length "<<matcombTotLen;
    
    if(matcombTotLen <= 0) {
      mf::LogError("CCTM")<<"SortMatches: bad matcomb total length "<<matcombTotLen;
      return;
    }
    
    // vector of matcomb indices of unique cluster matches
    std::vector<unsigned short> matIndex;
    // vector of matcomb indices of unique cluster matches that have the best total error
    std::vector<unsigned short> bestMatIndex;
    float totLen, totErr, bestTotErr = 9999;
    // start with the best match
    unsigned short jj, jm, nused, jcl;
    // fraction of the length of all clustters in matcomb that are used in a match
    float fracLen;
    
    for(ii = 0; ii < materr.size(); ++ii) {
      im = materr[ii].index;
      matIndex.clear();
      // skip really bad matches
      if(matcomb[im].Err > bestTotErr) continue;
      totLen = 0;
      // initialize pclUsed and flag the clusters in this match
      //      mf::LogVerbatim("CCTM")<<"chk ii "<<ii<<" clusters "<<matcomb[im].Cls[0]<<" "<<matcomb[im].Cls[1]<<" "<<matcomb[im].Cls[2];
      for(ipl = 0; ipl < nplanes; ++ipl) {
        // initialize to no clusters used
        std::fill(pclUsed[ipl].begin(), pclUsed[ipl].end(), false);
        // check for 2 plane match
        if(matcomb[im].Cls[ipl] < 0) continue;
        icl = matcomb[im].Cls[ipl];
        pclUsed[ipl][icl] = true;
        totLen += clsChain[ipl][icl].Length;
      } // ipl
      // Initialize the error sum
      totErr = matcomb[im].Err;
      // Save the index
      matIndex.push_back(im);
      // look for matches in the rest of the list that are not already matched.
      for(jj = 0; jj < materr.size(); ++jj) {
        if(jj == ii) continue;
        jm = materr[jj].index;
        // skip really bad matches
        if(matcomb[jm].Err > bestTotErr) continue;
        //        mf::LogVerbatim("CCTM")<<"chk match jj "<<jj<<" clusters "<<matcomb[jm].Cls[0]<<" "<<matcomb[jm].Cls[1]<<" "<<matcomb[jm].Cls[2];
        // check for non-unique cluster indices
        nused = 0;
        for(ipl = 0; ipl < nplanes; ++ipl) {
          if(matcomb[jm].Cls[ipl] < 0) continue;
          jcl = matcomb[jm].Cls[ipl];
          if(pclUsed[ipl][jcl]) ++nused;
          // This cluster chain was used in a previous match
          if(nused > 0) break;
          totLen += clsChain[ipl][jcl].Length;
        } // ipl
        // at least one of the clusters in this match have been used
        if(nused != 0) continue;
        // found a match with an unmatched set of clusters. Update the total error and flag them
        totErr += matcomb[jm].Err;
        matIndex.push_back(jm);
        // Flag the clusters used and see if all of them are used
        for(ipl = 0; ipl < nplanes; ++ipl) {
          if(matcomb[jm].Cls[ipl] < 0) continue;
          jcl = matcomb[jm].Cls[ipl];
          pclUsed[ipl][jcl] = true;
        } // ipl
      } // jm
      if(totLen == 0) continue;
      nused = 0;
      for(ipl = 0; ipl < nplanes; ++ipl) {
        for(unsigned short indx = 0; indx < pclUsed[ipl].size(); ++indx) if(pclUsed[ipl][indx]) ++nused;
      } // ipl
      if(totLen > matcombTotLen) std::cout<<"Oops "<<totLen<<" "<<matcombTotLen<<"\n";
      // weight the total error by the total length of all clusters
      fracLen = totLen / matcombTotLen;
//      totErr = totErr * nused / totLen;
//      totErr = totErr * matIndex.size() / fracLen;
      totErr /= fracLen;
      if(prt) {
        mf::LogVerbatim myprt("CCTM");
        myprt<<"match "<<im<<" totErr "<<totErr<<" nused "<<nused<<" fracLen "<<fracLen<<" totLen "<<totLen<<" mat: ";
        for(unsigned short indx = 0; indx < matIndex.size(); ++indx) myprt<<" "<<matIndex[indx];
      } // prt
      // check for more used clusters and a better total error
//      if(totErr < bestTotErr) {
      if(totErr < bestTotErr) {
        bestTotErr = totErr;
        bestMatIndex = matIndex;
        if(nused == matcombTotCl) break;
        if(prt) {
          mf::LogVerbatim myprt("CCTM");
          myprt<<"bestTotErr "<<bestTotErr<<" nused "<<nused<<" matcombTotCl "<<matcombTotCl<<" mat: ";
          for(unsigned short indx = 0; indx < bestMatIndex.size(); ++indx) myprt<<" "<<bestMatIndex[indx];
        } // prt
        // stop looking if we have found everything
        if(fracLen > 0.999) break;
      } // totErr < bestTotErr
    } // im
    
    if(bestTotErr > 9000) return;

    for(ii = 0; ii < bestMatIndex.size(); ++ii) {
      im = bestMatIndex[ii];
      //      if(prt) mf::LogVerbatim("CCTM")<<"SM: "<<ii<<" im "<<im<<" 0:"<<matcomb[im].Cls[0]<<":"<<matcomb[im].End[0]<<" 1:"<<matcomb[im].Cls[1]<<":"<<matcomb[im].End[1]<<" 2:"<<matcomb[im].Cls[2]<<":"<<matcomb[im].End[2];
      //      std::cout<<"FillTrkHits "<<ii<<"\n";
      FillTrkHits(fmCluHits, im);
      // look for missing clusters?
      // store this track with processor code 1
      StoreTrack(fmCluHits, im, procCode);
    } // ii
    
  } // SortMatches
  
  void CCTrackMaker::FillEndMatch2(MatchPars& match)
  {
    // 2D version of FillEndMatch
    
    match.Err = 100;
    match.oErr = 100;
    match.Chg[2] = 0;
    match.dWir = 0; match.dAng = 0;
    match.odWir = 0; match.odAng = 0;

    unsigned short ipl = 0;
    unsigned short jpl = 1;
//    mf::LogVerbatim("CCTM")<<"chk "<<ipl<<":"<<match.Cls[ipl]<<":"<<match.End[ipl]<<" and "<<jpl<<":"<<match.Cls[jpl]<<":"<<match.End[jpl];

    if(match.Cls[0] < 0 || match.Cls[1] < 0) return;
    
    unsigned short icl = match.Cls[ipl];
    unsigned short iend = match.End[ipl];
    match.Chg[ipl] = clsChain[ipl][icl].TotChg;
    // cluster i match end
    float miX = clsChain[ipl][icl].X[iend];
    // cluster i other end
    unsigned short oiend = 1 - iend;
    float oiX = clsChain[ipl][icl].X[oiend];

    unsigned short jcl = match.Cls[jpl];
    unsigned short jend = match.End[jpl];
    match.Chg[jpl] = clsChain[jpl][jcl].TotChg;
    // cluster j match end
    float mjX = clsChain[jpl][jcl].X[jend];
    // cluster j other end
    unsigned short ojend = 1 - jend;
    float ojX = clsChain[jpl][jcl].X[ojend];
    
    // look for a match end vertex match
    match.Vtx = -1;
    if(clsChain[ipl][icl].VtxIndex[iend] >= 0 &&
       clsChain[ipl][icl].VtxIndex[iend] == clsChain[jpl][jcl].VtxIndex[jend]) {
      match.Vtx = clsChain[ipl][icl].VtxIndex[iend];
      miX = vtx[match.Vtx].X;
      mjX = vtx[match.Vtx].X;
    }
    
    // look for an other end vertex match
    match.oVtx = -1;
    if(clsChain[ipl][icl].VtxIndex[oiend] >= 0 &&
       clsChain[ipl][icl].VtxIndex[oiend] == clsChain[jpl][jcl].VtxIndex[ojend]) {
      match.oVtx = clsChain[ipl][icl].VtxIndex[oiend];
      oiX = vtx[match.oVtx].X;
      ojX = vtx[match.oVtx].X;
    }
    
    // find the charge asymmetry
    float chgAsym = 1;
    if(fChgAsymFactor[algIndex] > 0) {
      chgAsym = fabs(match.Chg[ipl] - match.Chg[jpl]) / (match.Chg[ipl] + match.Chg[jpl]);
      if(chgAsym > 0.5) return;
      chgAsym = 1 + fChgAsymFactor[algIndex] * chgAsym;
    }
    
    // find the error at the match end
    float maxSlp = fabs(clsChain[ipl][icl].Slope[iend]);
    if(fabs(clsChain[jpl][jcl].Slope[jend]) > maxSlp) maxSlp = fabs(clsChain[jpl][jcl].Slope[jend]);
    float sigmaX = fXMatchErr[algIndex] + std::max(maxSlp, (float)20);
    match.dX = fabs(miX - mjX);
    match.Err = chgAsym * match.dX / sigmaX;
    
    
    // find the error at the other end
    maxSlp = fabs(clsChain[ipl][icl].Slope[oiend]);
    if(fabs(clsChain[jpl][jcl].Slope[ojend]) > maxSlp) maxSlp = fabs(clsChain[jpl][jcl].Slope[ojend]);
    sigmaX = fXMatchErr[algIndex] + std::max(maxSlp, (float)20);
    match.odX = fabs(oiX - ojX);
    match.oErr = chgAsym * match.odX / sigmaX;
    
    if(prt) mf::LogVerbatim("CCTM")<<"FEM2: m "<<ipl<<":"<<icl<<":"<<iend<<" miX "<<miX
      <<" - "<<jpl<<":"<<jcl<<":"<<jend<<" mjX "<<mjX<<" match.dX "<<match.dX
      <<" match.Err "<<match.Err<<" chgAsym "<<chgAsym<<" o "<<" oiX "<<oiX
      <<" ojX "<<ojX<<" match.odX "<<match.odX<<" match.oErr "<<match.oErr<<"\n";
    

} // FillEndMatch2
  
  void CCTrackMaker::FillEndMatch(MatchPars& match)
  {
    // fill the matching parameters for this cluster match. The calling routine
    // should set the match end vertex ID (if applicable) as well as the
    // cluster IDs and matching ends in each plane. Note that the matching variables
    // Note that dWir, dAng and dTim are not filled if there is a vertex (match.Vtx >= 0).
    // Likewise, odWir, odAng and odX are not filled if there is a vertex match
    // at the other end
    
    if(nplanes == 2) {
      FillEndMatch2(match);
      return;
    }
    
    std::array<short, 3> mVtx;
    std::array<short, 3> oVtx;
    std::array<float, 3> oWir;
    std::array<float, 3> oSlp;
    std::array<float, 3> oAng;
    std::array<float, 3> oX;
    
    std::array<float, 3> mChg;
    
    unsigned short ii, ipl, iend, jpl, jend, kpl, kend, oend;
    short icl, jcl, kcl;
    
    for(ipl = 0; ipl < 3; ++ipl) {
      mVtx[ipl] = -1; oVtx[ipl] = -1;
      oWir[ipl] = -66; oSlp[ipl] = -66; oAng[ipl] = -66; oX[ipl] = -66;
      mChg[ipl] = -1;
    } // ipl
    
    // initialize parameters that shouldn't have been set by the calling routine
    match.dWir = 0;  match.dAng = 0;  match.dX = 0;  match.Err = 100;
    match.odWir = 0; match.odAng = 0; match.odX = 0; match.oErr = 100;
    match.oVtx = -1;
    
    if(prt) {
      mf::LogVerbatim myprt("CCTM");
      myprt<<"FEM ";
      for(ipl = 0; ipl < nplanes; ++ipl) {
        myprt<<" "<<ipl<<":"<<match.Cls[ipl]<<":"<<match.End[ipl];
      }
    }
    
    short missingPlane = -1;
    unsigned short nClInPln = 0;
    // number of vertex matches at each end
    short aVtx = -1;
    unsigned short novxmat = 0;
    short aoVtx = -1;
    unsigned short nvxmat = 0;
    unsigned short nShortCl = 0;
    // fill the other end parameters in each plane
    for(ipl = 0; ipl < nplanes; ++ipl) {
      if(match.Cls[ipl] < 0) {
        missingPlane = ipl;
        continue;
      }
      ++nClInPln;
      icl = match.Cls[ipl];
      match.Chg[ipl] = clsChain[ipl][icl].TotChg;
      mChg[ipl] = clsChain[ipl][icl].TotChg;
      iend = match.End[ipl];
      mVtx[ipl] = clsChain[ipl][icl].VtxIndex[iend];
      if(clsChain[ipl][icl].Length < 6) ++nShortCl;
      if(mVtx[ipl] >= 0) {
        if(aVtx < 0) aVtx = mVtx[ipl];
        if(mVtx[ipl] == aVtx) ++nvxmat;
      }
      if(prt ) mf::LogVerbatim("CCTM")<<"FEM: m "<<ipl<<":"<<icl<<":"<<iend<<" Vtx "<<mVtx[ipl]<<"  Wir "<<clsChain[ipl][icl].Wire[iend]<<std::fixed<<std::setprecision(3)<<" Slp "<<clsChain[ipl][icl].Slope[iend]<<std::fixed<<std::setprecision(1)<<" X "<<clsChain[ipl][icl].X[iend];
      
      oend = 1 - iend;
      oWir[ipl] = clsChain[ipl][icl].Wire[oend];
      oAng[ipl] = clsChain[ipl][icl].Angle[oend];
      oSlp[ipl] = clsChain[ipl][icl].Slope[oend];
      oX[ipl] = clsChain[ipl][icl].X[oend];
      oVtx[ipl] = clsChain[ipl][icl].VtxIndex[oend];
      if(oVtx[ipl] >= 0) {
        if(aoVtx < 0) aoVtx = oVtx[ipl];
        if(oVtx[ipl] == aoVtx) ++novxmat;
      }
      
      if(prt) mf::LogVerbatim("CCTM")<<"     o "<<ipl<<":"<<icl<<":"<<oend<<" oVtx "<<oVtx[ipl]<<" oWir "<<oWir[ipl]<<std::fixed<<std::setprecision(3)<<" oSlp "<<oSlp[ipl]<<std::fixed<<std::setprecision(1)<<" oX "<<oX[ipl]<<" Chg "<<(int)mChg[ipl];
      
    } // ipl
    
    bool isShort = (nShortCl > 1);
    
    if(nClInPln < 2) {
      mf::LogWarning("CCTM")<<"Not enough matched planes supplied";
      return;
    }
    
    if(prt) mf::LogVerbatim("CCTM")<<"FEM: Vtx m "<<aVtx<<" count "<<nvxmat
      <<" o "<<aoVtx<<" count "<<novxmat
      <<" missingPlane "<<missingPlane
      <<" nClInPln "<<nClInPln;
    
    // perfect match
    if(nvxmat == 3 && novxmat == 3) {
      match.Vtx  =  aVtx; match.Err  = 0;
      match.oVtx = aoVtx; match.oErr = 0;
      return;
    }
    
    // 2-plane vertex match?
    // factors applied to error = 1 (no vtx), 0.5 (2 pln vtx), 0.33 (3 pln vtx)
    float vxFactor = 1;
    float ovxFactor = 1;
    if(nClInPln == 3) {
      // a cluster in all 3 planes
      if(nvxmat == 3) {
        // and all vertex assignments agree at the match end
        match.Vtx  =  aVtx; vxFactor = 0.33;
      }
      if(novxmat == 3) {
        // and all vertex assignments agree at the other end
        match.oVtx  =  aoVtx; ovxFactor = 0.33;
      }
    } else {
      // a cluster in 2 planes
      if(nvxmat == 2) {
        match.Vtx  =  aVtx; vxFactor = 0.5;
      }
      if(novxmat == 2) {
        match.oVtx  =  aoVtx; ovxFactor = 0.5;
      }
    } // nClInPln
    
    // find wire, X and Time at both ends
    
    // Find the "other end" matching parameters with
    // two cases: a 3-plane match or a 2-plane match
    // and with/without an other end vertex
    
    double ypos, zpos;
    float kWir, okWir;
    float kSlp, okSlp, kAng, okAng, okX, kX, kTim, okTim;
    
    if(nClInPln == 3) {
      ipl = 0; jpl = 1; kpl = 2;
    } else {
      // 2-plane match
      kpl = missingPlane;
      if(kpl == 0) {
        ipl = 1; jpl = 2;
      } else if(kpl == 1) {
        ipl = 2; jpl = 0;
      } else {
        ipl = 0; jpl = 1;
      } // kpl test
    } // missing plane
    iend = match.End[ipl]; jend = match.End[jpl];
    icl  = match.Cls[ipl];  jcl = match.Cls[jpl];
    if(nplanes > 2) {
      kcl = match.Cls[kpl];
      kend = match.End[kpl];
    }

    okSlp = geom->ThirdPlaneSlope(ipl, oSlp[ipl], jpl, oSlp[jpl], tpc, cstat);
    okAng = atan(okSlp);
    // handle the case near pi/2, where the errors on large slopes could result in
    // a wrong-sign kAng
    bool ignoreSign = (fabs(okSlp) > 10);
    if(ignoreSign) okAng = fabs(okAng);
    if(match.oVtx >= 0) {
      // a vertex exists at the other end
      okWir = geom->WireCoordinate(vtx[match.oVtx].Y, vtx[match.oVtx].Z, kpl, tpc, cstat);
      okX = vtx[match.oVtx].X;
    } else {
      // no vertex at the other end
      geom->IntersectionPoint(oWir[ipl], oWir[jpl],ipl, jpl, cstat, tpc, ypos, zpos);
      okWir = (0.5 + geom->WireCoordinate(ypos, zpos, kpl, tpc, cstat));
      okX = 0.5 * (oX[ipl] + oX[jpl]);
    }
    okTim = detprop->ConvertXToTicks(okX, kpl, tpc, cstat);
    if(prt) mf::LogVerbatim("CCTM")<<"FEM: oEnd"<<" kpl "<<kpl<<" okSlp "<<okSlp<<" okAng "
      <<okAng<<" okWir "<<(int)okWir<<" okX "<<okX;

    

    kSlp = geom->ThirdPlaneSlope(ipl, clsChain[ipl][icl].Slope[iend], jpl, clsChain[jpl][jcl].Slope[jend], tpc, cstat);
    kAng = atan(kSlp);
    if(ignoreSign) kAng = fabs(kAng);
    if(match.Vtx >= 0) {
      if(vtx.size() == 0 || (unsigned int)match.Vtx > vtx.size() - 1) {
        mf::LogError("CCTM")<<"FEM: Bad match.Vtx "<<match.Vtx<<" vtx size "<<vtx.size();
        return;
      }
      // a vertex exists at the match end
      kWir = geom->WireCoordinate(vtx[match.Vtx].Y, vtx[match.Vtx].Z, kpl, tpc, cstat);
      kX = vtx[match.Vtx].X;
    } else {
      // no vertex at the match end
      geom->IntersectionPoint(clsChain[ipl][icl].Wire[iend], clsChain[jpl][jcl].Wire[jend], ipl, jpl, cstat, tpc, ypos, zpos);
      kWir = (0.5 + geom->WireCoordinate(ypos, zpos, kpl, tpc, cstat));
      kX = 0.5 * (clsChain[ipl][icl].X[iend] + clsChain[jpl][jcl].X[jend]);
    }
    kTim = detprop->ConvertXToTicks(kX, kpl, tpc, cstat);
    if(prt) mf::LogVerbatim("CCTM")<<"FEM: mEnd"<<" kpl "<<kpl<<" kSlp "<<kSlp<<" kAng "<<kAng<<" kX "<<kX;
    
    // try to find a 3-plane match using this information
    if(nClInPln < 3 && FindMissingCluster(kpl, kcl, kend, kWir, kX, okWir, okX)) {
      nClInPln = 3;
      // update local variables
      match.Cls[kpl] = kcl;
      match.End[kpl] = kend;
      match.Chg[kpl] = clsChain[kpl][kcl].TotChg;
      mChg[kpl] = clsChain[kpl][kcl].TotChg;
      oend = 1 - kend;
      oWir[kpl] = clsChain[kpl][kcl].Wire[oend];
      oX[kpl] = clsChain[kpl][kcl].X[oend];
      oAng[kpl] = clsChain[kpl][kcl].Angle[oend];
      oSlp[kpl] = clsChain[kpl][kcl].Slope[oend];
    } // FindMissingCluster
    
    // decide whether to continue with a 2-plane match. The distance between match and other end should
    // be large enough to create a cluster
    if(nClInPln == 2 && fabs(okWir - kWir) > 3) return;
    
    // Calculate the cluster charge asymmetry. This factor will be applied
    // to the error of the end matches
    float chgAsym = 1;
    // Get the charge in the plane without a matching cluster
    if(nClInPln < 3 && mChg[missingPlane] <= 0) {
      if(missingPlane != kpl) mf::LogError("CCTM")<<"FEM bad missingPlane "<<missingPlane<<" "<<kpl<<"\n";
      mChg[kpl] = ChargeNear(kpl, (unsigned short)kWir, kTim, (unsigned short)okWir, okTim);
      match.Chg[kpl] = mChg[kpl];
      if(prt) mf::LogVerbatim("CCTM")<<"FEM: Missing cluster in "<<kpl<<" ChargeNear "<<(int)kWir<<":"<<(int)kTim
        <<" "<<(int)okWir<<":"<<(int)okTim<<" chg "<<mChg[kpl];
      if(mChg[kpl] <= 0) return;
    }
    
    if(fChgAsymFactor[algIndex] > 0) {
      chgAsym = ChargeAsym(mChg);
      if(chgAsym > 0.5) return;
      chgAsym = 1 + fChgAsymFactor[algIndex] * chgAsym;
    }
    
    if(prt) mf::LogVerbatim("CCTM")<<"FEM: charge asymmetry factor "<<chgAsym;
    float sigmaX, sigmaA;
    float da, dx, dw;
    
    // check for vertex consistency at the match end
    aVtx = -1;
    bool allPlnVtxMatch = false;
    if(nClInPln == 3) {
      unsigned short nmvtx = 0;
      for(ii = 0; ii < nplanes; ++ii) {
        if(mVtx[ii] >= 0) {
          if(aVtx < 0) aVtx = mVtx[ii];
          ++nmvtx;
        }
      } // ii
      // same vertex in all planes
      if(nmvtx ) allPlnVtxMatch = true;
    } // nClInPln
    
    // inflate the X match error to allow for missing one wire on the end of a cluster
    sigmaX = fXMatchErr[algIndex] + std::max(kSlp, (float)20);
    sigmaA = fAngleMatchErr[algIndex] * AngleFactor(kSlp);
    if(prt) mf::LogVerbatim("CCTM")<<"bb "<<algIndex<<"  "<<fXMatchErr[algIndex]<<" "<<fAngleMatchErr[algIndex]<<" kslp "<<kSlp;
    
    if(nClInPln == 3) {
      kcl = match.Cls[kpl];
      kend = match.End[kpl];
      dw = kWir - clsChain[kpl][kcl].Wire[kend];
      match.dWir = dw;
      if(fabs(match.dWir) > 100) return;
      if(match.Vtx >= 0) {
        match.dX = kX - clsChain[kpl][kcl].X[kend];
      } else {
        match.dX = std::abs(clsChain[ipl][icl].X[iend] - clsChain[jpl][jcl].X[jend]) +
                   std::abs(clsChain[ipl][icl].X[iend] - clsChain[kpl][kcl].X[kend]);
      }
      if(prt) mf::LogVerbatim("CCTM")<<" dw "<<dw<<" dx "<<match.dX;
      // TODO: Angle matching has problems with short clusters
      if(!isShort) {
        if(ignoreSign) {
          match.dAng = kAng - fabs(clsChain[kpl][kcl].Angle[kend]);
        } else {
          match.dAng = kAng - clsChain[kpl][kcl].Angle[kend];
        }
      } // !isShort
      da = fabs(match.dAng) / sigmaA;
      dx = fabs(match.dX) / sigmaX;
      if(allPlnVtxMatch) {
        // matched vertex. Use angle for match error
        match.Err = vxFactor * chgAsym * da / 3;
        if(prt) mf::LogVerbatim("CCTM")<<" 3-pln w Vtx  match.Err "<<match.Err;
      } else {
        dw /= 2;
        // divide by 9
        match.Err = vxFactor * chgAsym * sqrt(dx*dx + da*da + dw*dw) / 9;
        if(prt) mf::LogVerbatim("CCTM")<<" 3-pln match.Err "<<match.Err;
      }
    } else {
      // 2-plane match
      match.dWir = -1;
      match.dAng = -1;
      match.dX = clsChain[ipl][icl].X[iend] - clsChain[jpl][jcl].X[jend];
      // degrade error by 3 for 2-plane matches
      match.Err = 3 + vxFactor * chgAsym * fabs(match.dX) / sigmaX;
      if(prt) mf::LogVerbatim("CCTM")<<" 2-pln Err "<<match.Err;
    } // !(nClInPln == 3)
    
    if(nClInPln == 3) {
      // A cluster in all 3 planes
      dw = okWir - oWir[kpl];
      match.odWir = dw;
      if(match.oVtx >= 0) {
        match.odX = okX - oX[kpl];
      } else {
        match.odX = std::abs(oX[ipl] - oX[jpl]) + std::abs(oX[ipl] - oX[kpl]);
      }
      if(prt) mf::LogVerbatim("CCTM")<<" odw "<<match.odWir<<" odx "<<match.odX<<" sigmaX "<<sigmaX;
      // TODO: CHECK FOR SHOWER-LIKE CLUSTER OTHER END MATCH
      if(!isShort) {
        if(ignoreSign) {
          match.odAng = okAng - fabs(oAng[kpl]);
        } else {
          match.odAng = okAng - oAng[kpl];
        }
      } // !isShort
      da = match.odAng / sigmaA;
      dx = fabs(match.odX) / sigmaX;
      // error for wire number match
      dw /= 2;
      // divide by number of planes with clusters * 3 for dx, da and dw
      match.oErr = ovxFactor * chgAsym * sqrt(dx*dx + da*da + dw*dw) / 9;
      if(prt) mf::LogVerbatim("CCTM")<<" 3-pln match.oErr "<<match.oErr;
    } else {
      // Only 2 clusters in 3 planes
      match.odX = (oX[ipl] - oX[jpl]) / sigmaX;
      match.oErr = 3 + ovxFactor * chgAsym * fabs(match.odX);
      if(prt) mf::LogVerbatim("CCTM")<<" 2-pln match.oErr "<<match.oErr;
    }
    //    std::cout<<"FEM done\n";
    
    /*
     if(nClInPln == 3 && fabs(match.dAng) < 20) {
     if(fabs(match.dX) > 0.5) mf::LogVerbatim("CCTM")<<"Bad dX "<<match.dX<<" "<<dx<<" clusters "<<ipl<<":"<<icl<<" "<<jpl<<":"<<jcl<<" "<<kpl<<":"<<kcl<<"\n";
     // temp code to grep for ntuple elements in the output
     mf::LogVerbatim("CCTM")<<"ntup "<<kSlp<<" "<<match.dX<<" "<<chgAsym<<" "<<match.dAng<<" "<<match.dX<<" "<<match.dWir<<" "<<match.Err<<" "<<match.odAng<<" "<<match.odX<<" "<<match.odWir<<" "<<match.oErr;
     if(chgAsym > 1.5) mf::LogVerbatim("CCTM")<<"BadAsym "<<"0:"<<match.Cls[0]<<":"<<match.End[0]<<" 1:"<<match.Cls[1]<<":"<<match.End[1]<<" 2:"<<match.Cls[2]<<":"<<match.End[2];
     }
     */
  } // FillEndMatch
  
  
  void CCTrackMaker::FindMidPointMatch(art::FindManyP<recob::Hit> const& fmCluHits, MatchPars& match, unsigned short kkpl, unsigned short kkcl, unsigned short kkend, float& kkWir, float& kkX)
  {
    // Cluster chain kkcl is broken due to a failure in MakeClusterChains. Find the intersection of
    // the other two clusters in match at the appropriate end of cluster kkcl
    
    kkWir = -1;
    // find the match point at the other end of the original match point
    kkend = 1 - kkend;
    //    mf::LogVerbatim("CCTM")<<"FMPM "<<kkpl<<":"<<kkcl<<":"<<kkend;
    kkX = clsChain[kkpl][kkcl].X[kkend];
    float matchTime = detprop->ConvertXToTicks(kkX, kkpl, tpc, cstat);
    
    // vector of wire numbers that have the most similar time
    std::vector<unsigned int> wirs;
    std::vector<unsigned int> plns;
    std::vector<art::Ptr<recob::Hit>> clusterhits;
    for(unsigned short ipl = 0; ipl < nplanes; ++ipl) {
      if(ipl == kkpl) continue;
      // this shouldn't happen but check anyway
      if(match.Cls[ipl] < 0) continue;
      float dTime, best = 99999;
      unsigned short wire = 0;
      unsigned short icl, ccl = match.Cls[ipl];
      // loop over all clusters in the chain
      for(unsigned short ii = 0; ii < clsChain[kkpl][ccl].ClsIndex.size(); ++ii) {
        icl = clsChain[kkpl][ccl].ClsIndex[ii];
        if(cls[ipl][icl].EvtIndex > fmCluHits.size() -1) {
          std::cout<<"Bad ClsIndex in FMPM\n";
          exit(1);
        }
        clusterhits = fmCluHits.at(cls[ipl][icl].EvtIndex);
        // loop over all the hits in each cluster
        for(unsigned short iht = 0; iht < clusterhits.size(); ++iht) {
          dTime = fabs(clusterhits[iht]->PeakTime() - matchTime);
          if(dTime < best) {
            best = dTime;
            wire = clusterhits[iht]->WireID().Wire;
          }
        } // iht
      } // ii
      wirs.push_back(wire);
      plns.push_back(ipl);
      //      mf::LogVerbatim("CCTM")<<" ipl "<<ipl<<" wire "<<wire;
    } // ipl
    if(wirs.size() != 2) return;
    double Y, Z;
    geom->IntersectionPoint(wirs[0], wirs[1], plns[0], plns[1], cstat, tpc, Y, Z);
    kkWir = geom->WireCoordinate(Y, Z, kkpl, tpc, cstat);

  } // FindMidPointMatch
  
  bool CCTrackMaker::FindMissingCluster(unsigned short kpl, short& kcl, unsigned short& kend, float kWir, float kX, float okWir, float okX)
  {
    // try to attach a missing cluster to the cluster chain kcl. kend is the "match end"
    
    unsigned short okend;
    float dxcut;
    
    if(kcl >= 0) return false;
    
    // Look for a missing cluster with loose cuts
    float kslp = fabs((okX - kX) / (okWir - kWir));
    if(kslp > 20) kslp = 20;
    // expand dX cut assuming there is a missing hit on the end of a cluster => 1 wire
    dxcut = 3 * fXMatchErr[algIndex] + kslp;
    unsigned short nfound = 0;
    unsigned short foundCl = 0, foundEnd = 0;
    for(unsigned short ccl = 0; ccl < clsChain[kpl].size(); ++ccl) {
      if(clsChain[kpl][ccl].InTrack >= 0) continue;
      // require a match at both ends
      for(unsigned short end = 0; end < 2; ++end) {
        okend = 1 - end;
        if(fabs(clsChain[kpl][ccl].Wire[end] - kWir) > 4) continue;
        if(fabs(clsChain[kpl][ccl].Wire[okend] - okWir) > 4) continue;
        //          mf::LogVerbatim("CCTM")<<"FMC chk "<<kpl<<":"<<ccl<<":"<<end<<" dW "<<clsChain[kpl][ccl].Wire[end] - kWir<<" odW "<<clsChain[kpl][ccl].Wire[okend] - okWir<<" ccl X "<<clsChain[kpl][ccl].X[end]<<" kX "<<kX<<" ccl oX "<<clsChain[kpl][ccl].X[okend]<<" okX "<<okX<<" dxcut "<<dxcut;
        // require at least one end to match
        if(fabs(clsChain[kpl][ccl].X[end] - kX) > dxcut && fabs(clsChain[kpl][ccl].X[okend] - okX) > dxcut) continue;
        ++nfound;
        foundCl = ccl;
        foundEnd = end;
      } // end
    } // ccl
    if(nfound == 0) return false;
    if(nfound > 1) {
      mf::LogVerbatim("CCTM")<<"FindMissingCluster: Found too many matches. Write some code "<<nfound;
      return false;
    }
    kcl = foundCl;
    kend = foundEnd;
    return true;
    
  } // FindMissingCluster
  
  float CCTrackMaker::ChargeAsym(std::array<float, 3>& mChg)
  {
    // find charge asymmetry between the cluster with the highest (lowest)
    // charge
    float big = 0, small = 1.E9;
    for(unsigned short ii = 0; ii < 3; ++ii) {
      if(mChg[ii] < small) small = mChg[ii];
      if(mChg[ii] > big) big = mChg[ii];
    }
    // chgAsym varies between 0 (perfect charge match) and 1 (dreadfull)
    return (big - small) / (big + small);
  } // CalculateChargeAsym
  
  
  void CCTrackMaker::FillTrkHits(art::FindManyP<recob::Hit> const& fmCluHits, unsigned short imat)
  {
    // Fills the trkHits vector using cluster hits associated with the match combo imat
    
    unsigned short ipl;
    
    for(ipl = 0; ipl < 3; ++ipl) trkHits[ipl].clear();
    
    if(imat > matcomb.size()) return;
    
    unsigned short indx;
    std::vector<art::Ptr<recob::Hit>> clusterhits;
    unsigned short icc, ccl, icl, ecl, iht, ii;
    short endOrder, fillOrder;
    
    if(prt) mf::LogVerbatim("CCTM")<<"In FillTrkHits: matcomb "<<imat<<" cluster chains "<<matcomb[imat].Cls[0]<<" "<<matcomb[imat].Cls[1]<<" "<<matcomb[imat].Cls[2];

    for(ipl = 0; ipl < nplanes; ++ipl) {
      if(matcomb[imat].Cls[ipl] < 0) continue;
      // ccl is the cluster chain index
      ccl = matcomb[imat].Cls[ipl];
      // endOrder = 1 for normal order (hits added from US to DS), and -1 for reverse order
      endOrder = 1 - 2 * matcomb[imat].End[ipl];
      // re-order the sequence of cluster indices for reverse order
      if(endOrder < 0) {
        std::reverse(clsChain[ipl][ccl].ClsIndex.begin(), clsChain[ipl][ccl].ClsIndex.end());
        std::reverse(clsChain[ipl][ccl].Order.begin(), clsChain[ipl][ccl].Order.end());
        for(ii = 0; ii < clsChain[ipl][ccl].Order.size(); ++ii) clsChain[ipl][ccl].Order[ii] = 1 - clsChain[ipl][ccl].Order[ii];
      }
      if(ccl > clsChain[ipl].size() - 1) {
        mf::LogError("CCTM")<<"Bad cluster chain index "<<ccl<<" in plane "<<ipl;
        continue;
      }
      // loop over all the clusters in the chain
      for(icc = 0; icc < clsChain[ipl][ccl].ClsIndex.size(); ++icc) {
        icl = clsChain[ipl][ccl].ClsIndex[icc];
        if(icl > fmCluHits.size() - 1) {
          std::cout<<"oops in FTH "<<icl<<" clsChain size "<<clsChain[ipl].size()<<"\n";
          exit(1);
        }
        ecl = cls[ipl][icl].EvtIndex;
        if(ecl > fmCluHits.size() - 1) {
          std::cout<<"FTH bad EvtIndex "<<ecl<<" fmCluHits size "<<fmCluHits.size()<<"\n";
          continue;
        }
        clusterhits = fmCluHits.at(ecl);
        if(clusterhits.size() == 0) {
          std::cout<<"FTH no cluster hits for EvtIndex "<<cls[ipl][icl].EvtIndex<<"\n";
          continue;
        }
        indx = trkHits[ipl].size();
        trkHits[ipl].resize(indx + clusterhits.size());
        // ensure the hit fill ordering is consistent
        fillOrder = 1 - 2 * clsChain[ipl][ccl].Order[icc];
//        mf::LogVerbatim("CCTM")<<"FillOrder ipl "<<ipl<<" ccl "<<ccl<<" icl "<<icl<<" endOrder "<<endOrder<<" fillOrder "<<fillOrder;
        if(fillOrder == 1) {
//          mf::LogVerbatim("CCTM")<<" first hit "<<clusterhits[0]->WireID().Wire<<":"<<(int)clusterhits[0]->PeakTime();
          for(iht = 0; iht < clusterhits.size(); ++iht) {
            if(indx + iht > trkHits[ipl].size() - 1) std::cout<<"FTH oops3\n";
            trkHits[ipl][indx + iht] = clusterhits[iht];
          }
        } else {
//          iht = clusterhits.size() - 1;
//          mf::LogVerbatim("CCTM")<<" first hit "<<clusterhits[iht]->WireID().Wire<<":"<<(int)clusterhits[iht]->PeakTime();
          for(ii = 0; ii < clusterhits.size(); ++ii) {
            iht = clusterhits.size() - 1 - ii;
            if(indx + ii > trkHits[ipl].size() - 1) std::cout<<"FTH oops4\n";
            trkHits[ipl][indx + ii] = clusterhits[iht];
          } // ii
        }
      } // icc
      ii = trkHits[ipl].size() - 1;
      if(prt) mf::LogVerbatim("CCTM")<<"plane "<<ipl<<" first p "<<trkHits[ipl][0]->WireID().Plane<<" w "<<trkHits[ipl][0]->WireID().Wire<<":"<<(int)trkHits[ipl][0]->PeakTime()<<" last p "<<trkHits[ipl][ii]->WireID().Plane<<" w "<<trkHits[ipl][ii]->WireID().Wire<<":"<<(int)trkHits[ipl][ii]->PeakTime();
//      for(ii = 0; ii < trkHits[ipl].size(); ++ii) mf::LogVerbatim("CCTM")<<ii<<" p "<<trkHits[ipl][ii]->WireID().Plane<<" w "<<trkHits[ipl][ii]->WireID().Wire<<" t "<<(int)trkHits[ipl][ii]->PeakTime();
    } // ipl
    
    // TODO Check the ends of trkHits to see if there are missing hits that should have been included
    // in a cluster
    
  } // FillTrkHits
  
  void CCTrackMaker::PrintTracks() const
  {
    mf::LogVerbatim myprt("CCTM");
    myprt<<"********* PrintTracks \n";
    myprt<<"vtx  Index    X      Y      Z\n";
    for(unsigned short ivx = 0; ivx < vtx.size(); ++ivx) {
      myprt<<std::right<<std::setw(4)<<ivx<<std::setw(4)<<vtx[ivx].EvtIndex;
      myprt<<std::fixed;
      myprt<<std::right<<std::setw(10)<<std::setprecision(1)<<vtx[ivx].X;
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<vtx[ivx].Y;
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<vtx[ivx].Z;
      if(vtx[ivx].Neutrino) myprt<<" Neutrino vertex";
      myprt<<"\n";
    } // ivx
    
    myprt<<">>>>>>>>>> Tracks \n";
    myprt<<"trk  ID  Proc nht nTrj  sX     sY     sZ     eX     eY     eZ  sVx eVx sGd eGd ChgOrd  dirZ Mom PDG     ClsIndices\n";
    for(unsigned short itr = 0; itr < trk.size(); ++itr) {
      myprt<<std::right<<std::setw(3)<<itr<<std::setw(4)<<trk[itr].ID;
      myprt<<std::right<<std::setw(5)<<std::setw(4)<<trk[itr].Proc;
      unsigned short nht = 0;
      for(unsigned short ii = 0; ii < 3; ++ii) nht += trk[itr].TrkHits[ii].size();
      myprt<<std::right<<std::setw(5)<<nht;
      myprt<<std::setw(4)<<trk[itr].TrjPos.size();
      myprt<<std::fixed;
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<trk[itr].TrjPos[0](0);
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<trk[itr].TrjPos[0](1);
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<trk[itr].TrjPos[0](2);
      unsigned short itj = trk[itr].TrjPos.size() - 1;
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<trk[itr].TrjPos[itj](0);
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<trk[itr].TrjPos[itj](1);
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<trk[itr].TrjPos[itj](2);
      myprt<<std::setw(4)<<trk[itr].VtxIndex[0]<<std::setw(4)<<trk[itr].VtxIndex[1];
      myprt<<std::setw(4)<<trk[itr].GoodEnd[0];
      myprt<<std::setw(4)<<trk[itr].GoodEnd[1];
      myprt<<std::setw(4)<<trk[itr].ChgOrder;
      myprt<<std::right<<std::setw(10)<<std::setprecision(3)<<trk[itr].TrjDir[itj](2);
      myprt<<std::right<<std::setw(4)<<trk[itr].MomID;
      myprt<<std::right<<std::setw(5)<<trk[itr].PDGCode<<"   ";
      for(unsigned short ii = 0; ii < trk[itr].ClsEvtIndices.size(); ++ii) myprt<<" "<<trk[itr].ClsEvtIndices[ii];
      myprt<<"\n";
    } // itr
    
  } // PrintTracks
  
  
  void CCTrackMaker::PrintClusters() const
  {
    
    unsigned short iTime;
    mf::LogVerbatim myprt("CCTM");
    myprt<<"******* PrintClusters *********  Num_Clusters_in             Wire:Time\n";
    myprt<<"vtx  Index    X       Y       Z  Pln0 Pln1 Pln2          Pln0    Pln1    Pln2\n";
    for(unsigned short ivx = 0; ivx < vtx.size(); ++ivx) {
      myprt<<std::right<<std::setw(3)<<ivx<<std::setw(7)<<ivx;
      myprt<<std::fixed;
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<vtx[ivx].X;
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<vtx[ivx].Y;
      myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<vtx[ivx].Z;
      myprt<<std::right<<std::setw(5)<<vtx[ivx].nClusInPln[0];
      myprt<<std::right<<std::setw(5)<<vtx[ivx].nClusInPln[1];
      myprt<<std::right<<std::setw(5)<<vtx[ivx].nClusInPln[2];
      myprt<<"    ";
      for(unsigned short ipl = 0; ipl < nplanes; ++ipl) {
        int time = (0.5 + detprop->ConvertXToTicks(vtx[ivx].X, ipl, tpc, cstat));
        int wire = geom->WireCoordinate(vtx[ivx].Y, vtx[ivx].Z, ipl, tpc, cstat);
        myprt<<std::right<<std::setw(7)<<wire<<":"<<time;
      }

      myprt<<"\n";
    } // ivx
    
    for(unsigned short ipl = 0; ipl < nplanes; ++ipl) {
      myprt<<">>>>>>>>>> Cluster chains in Plane "<<ipl<<"\n";
      myprt<<"ipl   ccl  Len    Chg    W0:T0     Ang0 Dir0  Vx0  mBk0   W1:T1     Ang1 Dir1  Vx1  mBk1  InTk    cls:Order \n";
      for(unsigned short ccl = 0; ccl < clsChain[ipl].size(); ++ccl) {
        myprt<<std::right<<std::setw(3)<<ipl;
        myprt<<std::right<<std::setw(5)<<ccl;
        myprt<<std::right<<std::setw(6)<<clsChain[ipl][ccl].Length;
        myprt<<std::right<<std::setw(8)<<(int)clsChain[ipl][ccl].TotChg;
        for(unsigned short end = 0; end < 2; ++end) {
          iTime = clsChain[ipl][ccl].Time[end];
          myprt<<std::right<<std::setw(5)<<(int)clsChain[ipl][ccl].Wire[end]
          <<":"<<std::setprecision(1)<<iTime;
          if(iTime < 10) {
            myprt<<"   ";
          } else if(iTime < 100) {
            myprt<<"  ";
          } else if(iTime < 1000) myprt<<" ";
          myprt<<std::right<<std::setw(7)<<std::setprecision(2)<<clsChain[ipl][ccl].Angle[end];
          myprt<<std::right<<std::setw(5)<<clsChain[ipl][ccl].Dir[end];
          myprt<<std::right<<std::setw(5)<<clsChain[ipl][ccl].VtxIndex[end];
          myprt<<std::fixed<<std::right<<std::setw(6)<<std::setprecision(1)<<clsChain[ipl][ccl].mBrkIndex[end];
//          myprt<<std::fixed<<std::right<<std::setw(6)<<std::setprecision(1)<<clsChain[ipl][ccl].ChgNear[end];
        }
        myprt<<std::right<<std::setw(7)<<clsChain[ipl][ccl].InTrack;
        myprt<<"   ";
        for(unsigned short ii = 0; ii < clsChain[ipl][ccl].ClsIndex.size(); ++ii)
          myprt<<" "<<clsChain[ipl][ccl].ClsIndex[ii]<<":"<<clsChain[ipl][ccl].Order[ii];
        myprt<<"\n";
      } // ccl
      if(fPrintAllClusters) {
        myprt<<">>>>>>>>>> Clusters in Plane "<<ipl<<"\n";
        myprt<<"ipl  icl  Evt   Len     Chg   W0:T0     Ang0 Dir0  Vx0  CN0   W1:T1      Ang1  Dir1  Vx1  CN1 InTk Brk0 MrgEr0 Brk1 MrgEr1\n";
        for(unsigned short icl = 0; icl < cls[ipl].size(); ++icl) {
          myprt<<std::right<<std::setw(3)<<ipl;
          myprt<<std::right<<std::setw(5)<<icl;
          myprt<<std::right<<std::setw(5)<<cls[ipl][icl].EvtIndex;
          myprt<<std::right<<std::setw(6)<<cls[ipl][icl].Length;
          myprt<<std::right<<std::setw(8)<<(int)cls[ipl][icl].TotChg;
          for(unsigned short end = 0; end < 2; ++end) {
            iTime = cls[ipl][icl].Time[end];
            myprt<<std::right<<std::setw(5)<<(int)cls[ipl][icl].Wire[end]<<":"<<iTime;
            if(iTime < 10) {
              myprt<<"   ";
            } else if(iTime < 100) {
              myprt<<"  ";
            } else if(iTime < 1000) myprt<<" ";
            myprt<<std::right<<std::setw(7)<<std::setprecision(2)<<cls[ipl][icl].Angle[end];
            myprt<<std::right<<std::setw(5)<<cls[ipl][icl].Dir[end];
            myprt<<std::right<<std::setw(5)<<cls[ipl][icl].VtxIndex[end];
            myprt<<std::fixed<<std::right<<std::setw(5)<<std::setprecision(1)<<cls[ipl][icl].ChgNear[end];
          }
          myprt<<std::fixed;
          myprt<<std::right<<std::setw(5)<<cls[ipl][icl].InTrack;
          myprt<<std::right<<std::setw(5)<<(int)cls[ipl][icl].BrkIndex[0];
          myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<cls[ipl][icl].MergeError[0];
          myprt<<std::right<<std::setw(5)<<(int)cls[ipl][icl].BrkIndex[1];
          myprt<<std::right<<std::setw(7)<<std::setprecision(1)<<cls[ipl][icl].MergeError[1];
          myprt<<"\n";
        } // icl
      } // fPrintAllClusters
    } // ipl
  } // PrintClusters
  
  float CCTrackMaker::AngleFactor(float slope)
  {
    float slp = fabs(slope);
    if(slp > 10.) slp = 30.;
    // return a value between 1 and 46
    return 1 + 0.05 * slp * slp;
  } // AngleFactor
  
  float CCTrackMaker::ChargeNear(unsigned short ipl, unsigned short wire1, float time1, unsigned short wire2, float time2)
  {
    // returns the hit charge along a line between (wire1, time1) and
    // (wire2, time2)
    
    // put in increasing wire order (wire2 > wire1)
    unsigned short w1 = wire1;
    unsigned short w2 = wire2;
    double t1 = time1;
    double t2 = time2;
    double slp, prtime;
    if(w1 == w2) {
      slp = 0;
    } else {
      if(w1 > w2) {
        w1 = wire2;
        w2 = wire1;
        t1 = time2;
        t2 = time1;
      }
      slp = (t2 - t1) / (w2 - w1);
    }
    
    unsigned short wire;
    
    float chg = 0;
    for(unsigned short hit = 0; hit < allhits.size(); ++hit) {
      if(allhits[hit]->WireID().Cryostat != cstat) continue;
      if(allhits[hit]->WireID().TPC != tpc) continue;
      if(allhits[hit]->WireID().Plane != ipl) continue;
      wire = allhits[hit]->WireID().Wire;
      if(wire < w1) continue;
      if(wire > w2) continue;
      prtime = t1 + (wire - w1) * slp;
      //      std::cout<<"prtime "<<wire<<":"<<(int)prtime<<" hit "<<allhits[hit]->PeakTimeMinusRMS(3)<<" "<<allhits[hit]->PeakTimePlusRMS(3)<<"\n";
      if(prtime > allhits[hit]->PeakTimePlusRMS(3)) continue;
      if(prtime < allhits[hit]->PeakTimeMinusRMS(3)) continue;
      chg += ChgNorm[ipl] * allhits[hit]->Integral();
    } // hit
    return chg;
  } // ChargeNear
  
  void CCTrackMaker::FillWireHitRange()
  {
    // fills the WireHitRange vector. Slightly modified version of the one in ClusterCrawlerAlg
    
    unsigned short ipl;
    
    // initialize everything
    for(ipl = 0; ipl < 3; ++ipl) {
      firstWire[ipl] = INT_MAX;
      lastWire[ipl] = 0;
      firstHit[ipl] = INT_MAX;
      lastHit[ipl] = 0;
      WireHitRange[ipl].clear();
      ChgNorm[ipl] = 0;
    }
    
    // find the first and last wire with a hit
    unsigned short oldipl = 0;
    for(unsigned int hit = 0; hit < allhits.size(); ++hit) {
      if(allhits[hit]->WireID().Cryostat != cstat) continue;
      if(allhits[hit]->WireID().TPC != tpc) continue;
      ipl = allhits[hit]->WireID().Plane;
      if(allhits[hit]->WireID().Wire > geom->Nwires(ipl, tpc, cstat)) {
        if(lastWire[ipl] < firstWire[ipl]) {
          mf::LogError("CCTM")<<"Invalid WireID().Wire "<<allhits[hit]->WireID().Wire;
          return;
        }
      }
//      ChgNorm[ipl] += allhits[hit]->Integral();
      if(ipl < oldipl) {
        mf::LogError("CCTM")<<"Hits are not in increasing-plane order\n";
        return;
      }
      oldipl = ipl;
      if(firstHit[ipl] == INT_MAX) {
        firstHit[ipl] = hit;
        firstWire[ipl] = allhits[hit]->WireID().Wire;
      }
      lastHit[ipl] = hit;
      lastWire[ipl] = allhits[hit]->WireID().Wire;
    } // hit
    
    // xxx
    for(ipl = 0; ipl < nplanes; ++ipl) {
      if(lastWire[ipl] < firstWire[ipl]) {
        mf::LogError("CCTM")<<"Invalid first/last wire in plane "<<ipl;
        return;
      }
    } // ipl
    
    // normalize charge in induction planes to the collection plane
//    for(ipl = 0; ipl < nplanes; ++ipl) ChgNorm[ipl] = ChgNorm[nplanes - 1] / ChgNorm[ipl];
    for(ipl = 0; ipl < nplanes; ++ipl) ChgNorm[ipl] = 1;
    
    // get the service to learn about channel status
    //lariov::ChannelStatusProvider const& channelStatus
    //  = art::ServiceHandle<lariov::ChannelStatusService>()->GetProvider();
    
    // now we can define the WireHitRange vector.
    int sflag, nwires, wire;
    unsigned int indx, thisWire, thisHit, lastFirstHit;
    //uint32_t chan;
    for(ipl = 0; ipl < nplanes; ++ipl) {
      nwires = lastWire[ipl] - firstWire[ipl] + 1;
      WireHitRange[ipl].resize(nwires);
      // start by defining the "no hits on wire" condition
      sflag = -2;
      for(wire = 0; wire < nwires; ++wire) WireHitRange[ipl][wire] = std::make_pair(sflag, sflag);
      // overwrite with the "dead wires" condition
      sflag = -1;
      for(wire = 0; wire < nwires; ++wire) {
        //chan = geom->PlaneWireToChannel(ipl, wire, tpc, cstat);
        //if(channelStatus.IsBad(chan)) {
        //  indx = wire - firstWire[ipl];
        //  WireHitRange[ipl][indx] = std::make_pair(sflag, sflag);
        //}
      } // wire
      // next overwrite with the index of the first/last hit on each wire
      lastWire[ipl] = firstWire[ipl];
      thisHit = firstHit[ipl];
      lastFirstHit = firstHit[ipl];
      for(unsigned int hit = firstHit[ipl]; hit <= lastHit[ipl]; ++hit) {
        thisWire = allhits[hit]->WireID().Wire;
        if(thisWire > lastWire[ipl]) {
          indx = lastWire[ipl] - firstWire[ipl];
          int tmp1 = lastFirstHit;
          int tmp2 = thisHit;
          WireHitRange[ipl][indx] = std::make_pair(tmp1, tmp2);
          lastWire[ipl] = thisWire;
          lastFirstHit = thisHit;
        } else if(thisWire < lastWire[ipl]) {
          mf::LogError("CCTM")<<"Hit not in proper order in plane "<<ipl;
          exit(1);
        }
        ++thisHit;
      } // hit
      // define the last wire
      indx = lastWire[ipl] - firstWire[ipl];
      int tmp1 = lastFirstHit;
      ++lastHit[ipl];
      int tmp2 = lastHit[ipl];
      WireHitRange[ipl][indx] = std::make_pair(tmp1, tmp2);
      // add one to lastWire and lastHit for more standard indexing
      ++lastWire[ipl];
    } // ipl
    
    // error checking
    for(ipl = 0; ipl < nplanes; ++ipl) {
      if(firstWire[ipl] < INT_MAX) continue;
      if(lastWire[ipl] > 0) continue;
      if(firstHit[ipl] < INT_MAX) continue;
      if(lastHit[ipl] > 0) continue;
      std::cout<<"FWHR problem\n";
      exit(1);
    } // ipl
    
    unsigned int nht = 0;
    std::vector<bool> hchk(allhits.size());
    for(unsigned int ii = 0; ii < hchk.size(); ++ii) hchk[ii] = false;
    for(ipl = 0; ipl < nplanes; ++ipl) {
      for(unsigned int w = firstWire[ipl]; w < lastWire[ipl]; ++w) {
        indx = w - firstWire[ipl];
        if(indx > lastWire[ipl]) {
          std::cout<<"FWHR bad index "<<indx<<"\n";
          exit(1);
        }
        // no hit on this wire
        if(WireHitRange[ipl][indx].first < 0) continue;
        unsigned int firhit = WireHitRange[ipl][indx].first;
        unsigned int lashit = WireHitRange[ipl][indx].second;
        for(unsigned int hit = firhit; hit < lashit; ++hit) {
          ++nht;
          if(hit > allhits.size() -1) {
            std::cout<<"FWHR: Bad hchk "<<hit<<" size "<<allhits.size()<<"\n";
            continue;
          }
          hchk[hit] = true;
          if(allhits[hit]->WireID().Plane != ipl || allhits[hit]->WireID().Wire != w) {
            std::cout<<"FWHR bad plane "<<allhits[hit]->WireID().Plane<<" "<<ipl<<" or wire "<<allhits[hit]->WireID().Wire<<" "<<w<<"\n";
            exit(1);
          }
        } // hit
      } // w
    } // ipl
    
    if(nht != allhits.size()) {
      std::cout<<"FWHR hit count problem "<<nht<<" "<<allhits.size()<<"\n";
      for(unsigned int ii = 0; ii < hchk.size(); ++ii) if(!hchk[ii]) std::cout<<" "<<ii<<" "<<allhits[ii]->WireID().Plane<<" "<<allhits[ii]->WireID().Wire<<" "<<(int)allhits[ii]->PeakTime()<<"\n";
      exit(1);
    }
    
  } // FillWireHitRange
  DEFINE_ART_MODULE(CCTrackMaker)
  
} // namespace