FCALDistEnergyShowerLib.cxx

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/*
  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
*/
 
 
// this header file
#include "LArG4ShowerLib/FCALDistEnergyShowerLib.h"
 
#include "AtlasHepMC/GenParticle.h"
#include "AtlasHepMC/GenVertex.h"
 
#include <sstream>
#include <fstream>
 
#include <iostream>
#include <iomanip>
 
// G4 includes
#include "G4Track.hh"
 
#include "LArG4Code/EnergySpot.h"
#include "LArG4ShowerLib/ShowerEnergySpot.h"
 
#include "TTree.h"
#include "TFile.h"
#include "TParameter.h"
 
#define LIB_VERSION 4
 
namespace ShowerLib {
 
  inline int calcKey(float dist) {
      return (int)(dist*1000);
  }
 
  float FCALDistEnergyShowerLib::distance (double x, double y) const
  {
      double stepy = m_step * sqrt(3.)/2.;
      double dy =  fmod(y-m_yrodcent,stepy);
      int ny = int( (y-m_yrodcent)/stepy );
      //additional half shift:
      double dx0 = (ny % 2 )*m_step/2.;
      double dx = fmod(x-m_xrodcent-dx0,m_step);
      double d1 = sqrt(dx*dx+dy*dy);
      double d2 = sqrt((m_step-dx)*(m_step-dx)+dy*dy);
      double d3 = sqrt((m_step/2.-dx)*(m_step/2.-dx)+(stepy-dy)*(stepy-dy));
      float dd = d1;
      if (dd > d2) dd = d2;
      if (dd > d3) dd = d3;
      return dd;
  }
 
  IShowerLib* FCALDistEnergyShowerLib::readFromROOTFile(TFile* source)
  {
      TParameter<int>* ver;
      ver = (TParameter<int>*)source->Get("version");
 
      if ((ver == nullptr) || (ver->GetVal() != LIB_VERSION)) return nullptr;
 
      TTree* TTreeMeta = (TTree*)source->Get("meta");
      TTree* TTreeLib  = (TTree*)source->Get("library");
 
      if ((TTreeMeta == nullptr) || (TTreeLib == nullptr)) return nullptr;
 
      std::cout << "FCALDistEnergyShowerLib header found." << std::endl;
 
      FCALDistEnergyShowerLib* newlib = new FCALDistEnergyShowerLib();
 
      if (!(newlib->readMeta(TTreeMeta)) || !(newlib->read(TTreeLib))) {
          delete newlib;
          std::cout << "FCALDistEnergyShowerLib read unsuccessful." << std::endl;
          return nullptr;
      }
 
      return newlib;
 
  }
 
  IShowerLib* FCALDistEnergyShowerLib::createEmptyLib(const std::string& inputFile)
  {
      /*
       * Eta Energy Structure format:
       *
       * VER PART DET DIST1 DIST2 ...
       * XRODCENT YRODCENT STEP
       * COMMENT
       *
       * where
       *
       * VER == 4
       * DIST(N+1) > DIST(N)
       * DIST(N) >= 0
       * First DIST is the beginning of the lib. If not zero, zero will be added
       * Last DIST is the end of the lib. If less then 4.5, 4.5 will be added
       */
      std::ifstream filestr(inputFile.c_str(),std::ios::in);
 
 
      if (!filestr.is_open()) {
          std::cout << "FCALDistEnergyShowerLib    " << inputFile << ": bad file!" << std::endl;
          return nullptr;
      }
 
      std::string instr;
      std::getline(filestr,instr);
      std::stringstream ss(instr);
 
      int ver;
 
      ss >> ver;
 
      if (ver != LIB_VERSION) {
          return nullptr;
      }
 
 
      int part;
      std::string det;
 
      ss >> part >> det;
 
      std::vector<float> etalist;
 
      float eta;
      float etaold;
 
      ss >> eta;
 
      if (ss.fail()) {
          std::cout << "file reading failed! (not enough data)" << std::endl;
          return nullptr;
      }
 
      if (eta != 0.) {
          if (eta < 0) {
              std::cout << "no negative dists allowed (" << eta << ")" << std::endl;
              return nullptr;
          }
          etalist.push_back(0.);
      }
 
      etalist.push_back(eta);
      etaold = eta;
 
      while (!ss.eof()) {
          ss >> eta;
          if ((ss.fail()) || (eta <= etaold)) {
              std::cout << "screwed dists! (" << eta << "<=" << etaold << ")" << std::endl;
              return nullptr;
          }
          if (eta < 4.5) {
              etalist.push_back(eta);
          } else if (eta > 4.5) {
              std::cout << "dist can't be bigger than 4.5 (" << eta << "). ignored" << std::endl;
          }
          etaold = eta;
      }
 
      //if (etalist.back() < 4.5) etalist.push_back(4.5);
 
      FCALDistEnergyShowerLib* newlib = new FCALDistEnergyShowerLib();
      if (!newlib->readStructure(etalist)) {
          std::cout << "this structure is not valid" << std::endl;
          delete newlib;
          return nullptr;
      }
 
      newlib->m_detector = det;
      newlib->m_particle = part;
 
      newlib->m_filled = false;
 
      std::getline(filestr,instr);
          std::stringstream ss1(instr);
      
      ss1 >> (newlib->m_xrodcent) >> (newlib->m_yrodcent) >> (newlib->m_step);
 
      std::getline(filestr,instr);
      newlib->m_comment = instr;
 
      return newlib;
  }
 
  std::vector<EnergySpot>* FCALDistEnergyShowerLib::getShower(const G4Track* track, ShowerLibStatistics* stats, int randomShift) const
  {
      if (!m_filled) {
          std::cout << "Library is not created for production use" << std::endl;
          return nullptr;
      }
 
      //std::cout << "Starting getShower()" << std::endl;
 
      double x = track->GetPosition().getX();
      double y = track->GetPosition().getY();
 
      float dist = this->distance(x,y);
 
      G4int particleCode = track->GetDefinition()->GetPDGEncoding();
      if ( particleCode < 0 ) particleCode = -particleCode; // hack for positrons.
 
      if ( particleCode != m_particle ) {
          std::cout << "wrong particle: " << particleCode << "!=" << m_particle << std::endl;
          return nullptr;
      }
 
      //std::cout << "Extracted particle parameters: " << eta << std::endl;
 
      library::const_iterator libit = m_libData.upper_bound(dist);
 
      if (libit == m_libData.begin()) {
          //this is really weird
          std::cout << "Something is wrong with dist: x=" << x << " y=" << y << " dist=" << dist << std::endl;
      } else {
          --libit;
      }
 
      //std::cout << "Found eta bin" << std::endl;
 
      if ((*libit).second.empty()) {
          std::cout << "The etabin corresponding to the eta is empty" << std::endl;
          return nullptr;
      }
      double trenergy = track->GetKineticEnergy();
      //std::cout << "Energy: " << trenergy << std::endl;
      distbin::const_iterator distit = (*libit).second.lower_bound(trenergy);
      if (distit == (*libit).second.end()) --distit; //if it points to the end, repoint it to the last shower in bin
      else if (distit != (*libit).second.begin()) { //find the closest energy. it's either found item or previous (if there is a previous)
          distbin::const_iterator distitch = distit;
          --distitch;
          if (((*distit).first - trenergy) > (trenergy - (*distitch).first)) { // the closest is the previous
              --distit;
          }
      }
      //std::cout << "Found closest energy:" << (*distit).first << std::endl;
      if (randomShift > 0) {
          double upperEnergy = (*distit).first * 1.01; //we allow 1% off
          for (int i = 0; i < randomShift; i++) {
              ++distit;
              if (distit == (*libit).second.end()) {
                  --distit;
                  break;
              }
              if ((*distit).first > upperEnergy) break; //energy diff too high
          }
      }
      if ((randomShift < 0)&&(distit != (*libit).second.begin())) {
          double lowerEnergy = (*distit).first * 0.99; //we allow 1% off
          for (int i = 0; i > randomShift; i--) {
              --distit;
              if (distit == (*libit).second.begin()) {
                  //distit++;
                  break;
              }
              if (lowerEnergy > (*distit).first) break; //energy diff too high
          }
      }
      //std::cout << "Found out energy" << std::endl;
      //std::cout << "Shower with num hits:" << (*etait).second.size() << std::endl;
      std::vector<EnergySpot>* outshower = new std::vector<EnergySpot>();//((*etait).second);
      Shower::const_iterator iter;
      //std::cout << "Created out shower" << std::endl;
 
      float energyScale = track->GetKineticEnergy() / (*distit).first;
      //std::cout << "Scale: " << energyScale << std::endl;
 
      for (iter = (*distit).second.begin() /*outshower->begin()*/; iter != (*distit).second.end() /*outshower->end()*/; ++iter) {
          EnergySpot tmp( (*iter)->GetPosition(), (*iter)->GetEnergy(), (*iter)->GetTime() );
          tmp.SetEnergy(tmp.GetEnergy() * energyScale);
          outshower->push_back(tmp);
          //(*iter).SetEnergy((*iter).GetEnergy() * energyScale);
      }
      //std::cout << "Scaled" << std::endl;
      if (stats != nullptr) {
          stats->recordShowerLibUse(calcKey((*libit).first));
      }
      //std::cout << "Done" << std::endl;
      return outshower;
  }
 
  double FCALDistEnergyShowerLib::getContainmentZ(const G4Track* track) const
  {
      if (!m_filled) {
          std::cout << "Library is not created for production use" << std::endl;
          return 0;
      }
 
      //std::cout << "Starting getShower()" << std::endl;
 
      double x = track->GetPosition().getX();
      double y = track->GetPosition().getY();
 
      float dist = this->distance(x,y);
 
      G4int particleCode = track->GetDefinition()->GetPDGEncoding();
      if ( particleCode < 0 ) particleCode = -particleCode; // hack for positrons.
 
      if ( particleCode != m_particle ) {
          std::cout << "wrong particle: " << particleCode << "!=" << m_particle << std::endl;
          return 0;
      }
 
      library::const_iterator libit = m_libData.upper_bound(dist);
 
      if (libit == m_libData.begin()) {
          //this is really weird
          std::cout << "Something is wrong with dist: x=" << x << " y=" << y << " dist=" << dist << std::endl;
      } else {
          --libit;
      }
 
      //std::cout << "Found eta bin" << std::endl;
 
      if ((*libit).second.empty()) {
          std::cout << "The etabin corresponding to the eta is empty" << std::endl;
          return 0;
      }
      double trenergy = track->GetKineticEnergy();
      //std::cout << "Energy: " << trenergy << std::endl;
      distbin::const_iterator distit = (*libit).second.lower_bound(trenergy);
      if (distit == (*libit).second.end()) --distit; //if it points to the end, repoint it to the last shower in bin
      else if (distit != (*libit).second.begin()) { //find the closest energy. it's either found item or previous (if there is a previous)
          distbin::const_iterator distitch = distit;
          --distitch;
          if (((*distit).first - trenergy) > (trenergy - (*distitch).first)) { // the closest is the previous
              --distit;
          }
      }
      //std::cout << "Found closest energy:" << (*etait).first << std::endl;
      double rezZ = (*distit).second.getZSize();
      distbin::const_iterator distiter = distit;
      int actualNumFS = 1;
      int spread = 2; //will calculate average Z for 5 showers max ( -2 .. 0 .. +2 )
      double upperEnergy = (*distit).first * 1.01; //we allow 1% off
      for (int i = 0; i < spread; i++) {
          ++distiter;
          if (distiter == (*libit).second.end()) {
              break;
          }
          if (upperEnergy < (*distiter).first) break; //energy diff too high
          //the shower is OK, including it to the average
          rezZ += (*distiter).second.getZSize();
          actualNumFS++;
      }
      distiter = distit;
      if (distiter != (*libit).second.begin()) {
          double lowerEnergy = (*distit).first * 0.99; //we allow 1% off
          for (int i = 0; i < spread; i++) {
              --distiter;
              if (lowerEnergy > (*distiter).first) break; //energy diff too high
              //the shower is OK, including it to the average
              rezZ += (*distiter).second.getZSize();
              actualNumFS++;
              if (distiter == (*libit).second.begin()) {
                  break;
              }
          }
      }
      return rezZ/actualNumFS; //average Z size
  }
 
  double FCALDistEnergyShowerLib::getContainmentR(const G4Track* track) const
  {
      if (!m_filled) {
          std::cout << "Library is not created for production use" << std::endl;
          return 0;
      }
 
      //std::cout << "Starting getShower()" << std::endl;
 
      double x = track->GetPosition().getX();
      double y = track->GetPosition().getY();
 
      float dist = this->distance(x,y);
 
      G4int particleCode = track->GetDefinition()->GetPDGEncoding();
      if ( particleCode < 0 ) particleCode = -particleCode; // hack for positrons.
 
      if ( particleCode != m_particle ) {
          std::cout << "wrong particle: " << particleCode << "!=" << m_particle << std::endl;
          return 0;
      }
 
      library::const_iterator libit = m_libData.upper_bound(dist);
 
      if (libit == m_libData.begin()) {
          //this is really weird
          std::cout << "Something is wrong with dist: x=" << x << " y=" << y << " dist=" << dist << std::endl;
      } else {
          --libit;
      }
 
      //std::cout << "Found eta bin" << std::endl;
 
      if ((*libit).second.empty()) {
          std::cout << "The etabin corresponding to the eta is empty" << std::endl;
          return 0;
      }
      double trenergy = track->GetKineticEnergy();
      //std::cout << "Energy: " << trenergy << std::endl;
      distbin::const_iterator distit = (*libit).second.lower_bound(trenergy);
      if (distit == (*libit).second.end()) --distit; //if it points to the end, repoint it to the last shower in bin
      else if (distit != (*libit).second.begin()) { //find the closest energy. it's either found item or previous (if there is a previous)
          distbin::const_iterator distitch = distit;
          --distitch;
          if (((*distit).first - trenergy) > (trenergy - (*distitch).first)) { // the closest is the previous
              --distit;
          }
      }
      //std::cout << "Found closest energy:" << (*etait).first << std::endl;
      double rezR = (*distit).second.getRSize();
      distbin::const_iterator distiter = distit;
      int actualNumFS = 1;
      int spread = 2; //will calculate average Z for 5 showers max ( -2 .. 0 .. +2 )
      double upperEnergy = (*distit).first * 1.01; //we allow 1% off
      for (int i = 0; i < spread; i++) {
          ++distiter;
          if (distiter == (*libit).second.end()) {
              break;
          }
          if (upperEnergy < (*distiter).first) break; //energy diff too high
          //the shower is OK, including it to the average
          rezR += (*distiter).second.getRSize();
          actualNumFS++;
      }
      distiter = distit;
      if (distiter != (*libit).second.begin()) {
          double lowerEnergy = (*distit).first * 0.99; //we allow 1% off
          for (int i = 0; i < spread; i++) {
              --distiter;
              if (lowerEnergy > (*distiter).first) break; //energy diff too high
              //the shower is OK, including it to the average
              rezR += (*distiter).second.getRSize();
              actualNumFS++;
              if (distiter == (*libit).second.begin()) {
                  break;
              }
          }
      }
      return rezR/actualNumFS; //average Z size
  }
 
  bool FCALDistEnergyShowerLib::storeShower(HepMC::ConstGenParticlePtr genParticle, const Shower* shower)
  {
      if (m_filled) {
          std::cout << "ERROR: filled" << std::endl;
          return false;
      }
 
      double x = genParticle->production_vertex()->position().x();
      double y = genParticle->production_vertex()->position().y();
 
      float dist = this->distance(x,y);
 
      if ( genParticle->pdg_id() != m_particle ) {
          std::cout << "ERROR: wrong pdgcode: " << m_particle << " != " << genParticle->pdg_id() << std::endl;
          return false;
      }
 
      library::iterator libit = m_libData.upper_bound(dist);
      if (libit == m_libData.begin()) {
          //this is really weird
          std::cout << "Something is wrong with dist: x=" << x << " y=" << y << " dist=" << dist << std::endl;
      } else {
          --libit;
      }
      (*libit).second.insert(distbin::value_type(genParticle->momentum().e(),(*shower)));
      return true;
  }
 
  bool FCALDistEnergyShowerLib::writeToROOT(TFile* dest)
  {
      if (m_libData.empty()) return false;
      TParameter<int> ver("version",LIB_VERSION);
 
      dest->WriteObject(&ver,"version");
 
      TTree TTreeMeta;
      TTree TTreeLib;
 
      write(&TTreeLib);
      writeMeta(&TTreeMeta);
 
      dest->WriteObject(&TTreeLib,"library");
      dest->WriteObject(&TTreeMeta,"meta");
 
      return true;
  }
 
 
  bool FCALDistEnergyShowerLib::read(TTree* source)
  {
      /*
       * Dist Energy library format:
       * |       x      |       y      |       z      |    e     |  time  |  - name of branch in TTree
       * ------------------------------------------------------------------
       * |  xrod cent   |  yrod cent   |step (roddist)|   not    |  not   |  - library header
       * | (parameter)  | (parameter)  | (parameter)  |   used   |  used  |
       * ------------------------------------------------------------------
       * |num of showers| min dist for |     not      |   not    |  not   |  - dist bin header
       * | in dist bin  | cur dist bin |     used     |   used   |  used  |
       * ------------------------------------------------------------------
       * | num of hits  |shower r-size |shower z-size |  truth   |  not   |  - shower header
       * |  in shower   |for cont.check|for cont.check|  energy  |  used  |
       * ------------------------------------------------------------------
       * |x-coord of hit|y-coord of hit|z-coord of hit|dep.energy|hit time|  - hit
       */
      int nentr = source->GetEntriesFast();
      if (nentr < 3) return false;
      Float_t x,y,z,e,time;
      source->SetBranchAddress("x",&x);
      source->SetBranchAddress("y",&y);
      source->SetBranchAddress("z",&z);
      source->SetBranchAddress("e",&e);
      source->SetBranchAddress("time",&time);
      int entr = 0;
 
          source->GetEntry(entr++);
      m_xrodcent = x;
      m_yrodcent = y;
      m_step = z;
 
      do {
          //read eta bin header
          source->GetEntry(entr++); //x - nshowers, y - min dist in the current dist bin
          int nsh = (int)(x+0.1); // +0.1 just in case - c++ has low round
          float curDist = y;
          distbin * curbin = &(m_libData[curDist]); //creating a new dist bin
          for(int i = 0; i < nsh; i++) {
              //read shower header
              source->GetEntry(entr++); //x - nhits, y - r size, z - z size, e - gen energy
              int nhits = (int)(x+0.1);
              float curEnergy = e;
              Shower * shower = &((*curbin)[curEnergy]);
              shower->setRSize(y);
              shower->setZSize(z);
              for(int j = 0; j < nhits; j++) {
                  source->GetEntry(entr++); //variables mean what the name suggests
                  shower->push_back(new ShowerEnergySpot(G4ThreeVector(x,y,z),e,time));
              }
          }
      } while (entr < nentr);
 
      if (entr != nentr) {
          return false;
      }
 
      m_filled = true;
      return true;
  }
 
  bool FCALDistEnergyShowerLib::write(TTree* dest) const
  {
      /*
       * Dist Energy library format:
       * |       x      |       y      |       z      |    e     |  time  |  - name of branch in TTree
       * ------------------------------------------------------------------
       * |  xrod cent   |  yrod cent   |step (roddist)|   not    |  not   |  - library header
       * | (parameter)  | (parameter)  | (parameter)  |   used   |  used  |
       * ------------------------------------------------------------------
       * |num of showers| min dist for |     not      |   not    |  not   |  - dist bin header
       * | in dist bin  | cur dist bin |     used     |   used   |  used  |
       * ------------------------------------------------------------------
       * | num of hits  |shower r-size |shower z-size |  truth   |  not   |  - shower header
       * |  in shower   |for cont.check|for cont.check|  energy  |  used  |
       * ------------------------------------------------------------------
       * |x-coord of hit|y-coord of hit|z-coord of hit|dep.energy|hit time|  - hit
       */
      Float_t x,y,z,e,time;
      dest->Branch("x",&x);
      dest->Branch("y",&y);
      dest->Branch("z",&z);
      dest->Branch("e",&e);
      dest->Branch("time",&time);
 
      x = m_xrodcent;
      y = m_yrodcent;
      z = m_step;
      e = 0;
      time = 0;
      dest->Fill();
      
      library::const_iterator libit;
      for (libit = m_libData.begin(); libit != m_libData.end(); ++libit) {
          x = (*libit).second.size();
          y = (*libit).first;
          z = 0;
          e = 0;
          time = 0;
          dest->Fill(); //eta bin header
          distbin::const_iterator distit;
          for (distit = (*libit).second.begin(); distit != (*libit).second.end(); ++distit) {
              x = (*distit).second.size();
              y = (*distit).second.getRSize();
              z = (*distit).second.getZSize();
              e = (*distit).first;
              time = 0;
              dest->Fill(); //shower header
              Shower::const_iterator iter;
              for (iter = (*distit).second.begin(); iter != (*distit).second.end(); ++iter) {
                  x = (*iter)->GetPosition().x();
                  y = (*iter)->GetPosition().y();
                  z = (*iter)->GetPosition().z();
                  e = (*iter)->GetEnergy();
                  time = (*iter)->GetTime();
                  dest->Fill();
              }
          }
      }
      //dest->Write();
      return true;
  }
 
  const std::string FCALDistEnergyShowerLib::printParameters() const
  {
      std::stringstream ss;
      ss << std::fixed << std::setprecision(3);
      ss << "Distance calculator parameters: xrod_cent=" << m_xrodcent << " yrod_cent=" << m_yrodcent << " step=" << m_step;
      return ss.str();
  }
 
  bool FCALDistEnergyShowerLib::readStructure(std::vector<float>& structure)
  {
      std::vector<float>::const_iterator iter;
 
      for (iter = structure.begin(); iter != structure.end(); ++iter) {
          m_libData[(*iter)];
      }
 
      return true;
  }
 
  ShowerLibStatistics* FCALDistEnergyShowerLib::createStatistics() const
  {
      std::map<int, std::string> names;
      std::map<int, int> sizes;
      for(library::const_iterator it = m_libData.begin(); it != m_libData.end(); ++it) {
        sizes[calcKey(it->first)]=it->second.size();
        float distlow = it->first;
        float disthigh;
        library::const_iterator it_copy = it;
        ++it_copy;
        if (it_copy == m_libData.end()) {
          disthigh = 4.5;
        } else {
          disthigh = it_copy->first;
        }
        std::stringstream ss;
        ss << std::showpos << std::fixed << std::setprecision(2);
        ss << "DIST: " << distlow << " .. " << disthigh;
        names[calcKey(it->first)] = ss.str();
      }
      return new ShowerLibStatistics(names, sizes);
  }
 
} // namespace ShowerLib