/afs/cern.ch/work/a/aaltunda/public/www/CMSSW_5_3_14/src/SimG4Core/Application/src/StackingAction.cc

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#include "SimG4Core/Application/interface/StackingAction.h"
#include "SimG4Core/Notification/interface/CurrentG4Track.h"
#include "SimG4Core/Notification/interface/NewTrackAction.h"
#include "SimG4Core/Notification/interface/TrackInformation.h"
#include "SimG4Core/Notification/interface/TrackInformationExtractor.h"

#include "FWCore/MessageLogger/interface/MessageLogger.h"

#include "G4VProcess.hh"
#include "G4EmProcessSubType.hh"
#include "G4LogicalVolumeStore.hh"
#include "G4RegionStore.hh"

#include<algorithm>

//#define DebugLog

StackingAction::StackingAction(const edm::ParameterSet & p) {

  trackNeutrino  = p.getParameter<bool>("TrackNeutrino");
  killHeavy      = p.getParameter<bool>("KillHeavy");
  kmaxIon        = p.getParameter<double>("IonThreshold")*MeV;
  kmaxProton     = p.getParameter<double>("ProtonThreshold")*MeV;
  kmaxNeutron    = p.getParameter<double>("NeutronThreshold")*MeV;
  killDeltaRay   = p.getParameter<bool>("KillDeltaRay");
  maxTrackTime   = p.getParameter<double>("MaxTrackTime")*ns;
  maxTrackTimes  = p.getParameter<std::vector<double> >("MaxTrackTimes");
  maxTimeNames   = p.getParameter<std::vector<std::string> >("MaxTimeNames");
  savePDandCinTracker = p.getUntrackedParameter<bool>("SavePrimaryDecayProductsAndConversionsInTracker",false);
  savePDandCinCalo    = p.getUntrackedParameter<bool>("SavePrimaryDecayProductsAndConversionsInCalo",false);
  savePDandCinMuon    = p.getUntrackedParameter<bool>("SavePrimaryDecayProductsAndConversionsInMuon",false);
  saveFirstSecondary  = p.getUntrackedParameter<bool>("SaveFirstLevelSecondary",false);

  edm::LogInfo("SimG4CoreApplication") << "StackingAction initiated with"
                                       << " flag for saving decay products in "
                                       << " Tracker: " << savePDandCinTracker
                                       << " in Calo: " << savePDandCinCalo
                                       << " in Muon: " << savePDandCinMuon
                                       << "\n               saveFirstSecondary"
                                       << ": " << saveFirstSecondary
                                       << " Flag for tracking neutrino: "
                                       << trackNeutrino << " Killing Flag "
                                       << killHeavy << " protons below " 
                                       << kmaxProton <<" MeV, neutrons below "
                                       << kmaxNeutron << " MeV and ions"
                                       << " below " << kmaxIon << " MeV\n"
                                       << "               kill tracks with "
                                       << "time larger than " << maxTrackTime
                                       << " ns and kill Delta Ray flag set to "
                                       << killDeltaRay;
  for (unsigned int i=0; i<maxTrackTimes.size(); i++) {
    maxTrackTimes[i] *= ns;
    edm::LogInfo("SimG4CoreApplication") << "StackingAction::MaxTrackTime for "
                                         << maxTimeNames[i] << " is " 
                                         << maxTrackTimes[i];
  }
  initPointer();
}

StackingAction::~StackingAction() {}

G4ClassificationOfNewTrack StackingAction::ClassifyNewTrack(const G4Track * aTrack) {

  // G4 interface part
  G4ClassificationOfNewTrack classification = fUrgent;
  int flag = 0;

  NewTrackAction newTA;
  if (aTrack->GetCreatorProcess()==0 || aTrack->GetParentID()==0) {
    newTA.primary(aTrack);
  } else if (aTrack->GetTouchable() == 0) {
    edm::LogError("SimG4CoreApplication")
      << "StackingAction: no touchable for track " << aTrack->GetTrackID()
      << " from " << aTrack->GetParentID()
      << " with PDG code " << aTrack->GetDefinition()->GetParticleName();
    classification = fKill;
  } else {
    const G4Track * mother = CurrentG4Track::track();
    if ((savePDandCinTracker && isThisVolume(aTrack->GetTouchable(),tracker))||
        (savePDandCinCalo && isThisVolume(aTrack->GetTouchable(),calo)) ||
        (savePDandCinMuon && isThisVolume(aTrack->GetTouchable(),muon)))
      flag = isItPrimaryDecayProductOrConversion(aTrack, *mother);
    if (saveFirstSecondary) flag = isItFromPrimary(*mother, flag);
    newTA.secondary(aTrack, *mother, flag);

    if (aTrack->GetTrackStatus() == fStopAndKill) classification = fKill;
    if (killHeavy) {
      int    pdg = aTrack->GetDefinition()->GetPDGEncoding();
      double ke  = aTrack->GetKineticEnergy()/MeV;
      if (((pdg/1000000000 == 1) && (((pdg/10000)%100) > 0) && 
           (((pdg/10)%100) > 0) && (ke<kmaxIon)) || 
          ((pdg == 2212) && (ke < kmaxProton)) ||
          ((pdg == 2112) && (ke < kmaxNeutron))) classification = fKill;
    }
    if (!trackNeutrino) {
      int    pdg = std::abs(aTrack->GetDefinition()->GetPDGEncoding());
      if (pdg == 12 || pdg == 14 || pdg == 16 || pdg == 18) 
        classification = fKill;
    }
    if (isItLongLived(aTrack)) classification = fKill;
    if (killDeltaRay) {
      if (aTrack->GetCreatorProcess()->GetProcessType() == fElectromagnetic &&
          aTrack->GetCreatorProcess()->GetProcessSubType() == fIonisation)
        classification = fKill;
    }
#ifdef DebugLog
    LogDebug("SimG4CoreApplication") << "StackingAction:Classify Track "
                                     << aTrack->GetTrackID() << " Parent " 
                                     << aTrack->GetParentID() << " Type "
                                     << aTrack->GetDefinition()->GetParticleName() 
                                     << " K.E. " << aTrack->GetKineticEnergy()/MeV
                                     << " MeV from process/subprocess " 
                                     << aTrack->GetCreatorProcess()->GetProcessType() << "|"
                                     << aTrack->GetCreatorProcess()->GetProcessSubType()
                                     << " as " << classification << " Flag " << flag;
#endif
  }
  return classification;
}

void StackingAction::NewStage() {}

void StackingAction::PrepareNewEvent() {}

void StackingAction::initPointer() {

  const G4LogicalVolumeStore * lvs = G4LogicalVolumeStore::GetInstance();
  if (lvs) {
    std::vector<G4LogicalVolume*>::const_iterator lvcite;
    for (lvcite = lvs->begin(); lvcite != lvs->end(); lvcite++) {
      if (savePDandCinTracker) {
        if (strcmp("Tracker",(*lvcite)->GetName().c_str()) == 0) tracker.push_back(*lvcite);
        if (strcmp("BEAM",(*lvcite)->GetName().substr(0,4).c_str()) == 0) tracker.push_back(*lvcite);
      }
      if (savePDandCinCalo) {
        if (strcmp("CALO",(*lvcite)->GetName().c_str()) == 0) calo.push_back(*lvcite);
        if (strcmp("VCAL",(*lvcite)->GetName().c_str()) == 0) calo.push_back(*lvcite);
      }
      if (savePDandCinMuon) {
        if (strcmp("MUON",(*lvcite)->GetName().c_str()) == 0) muon.push_back(*lvcite);
      }
    }
    edm::LogInfo("SimG4CoreApplication") << "# of LV for Tracker " 
                                         << tracker.size() << " for Calo "
                                         << calo.size() << " for Muon "
                                         << muon.size();
    for (unsigned int i=0; i<tracker.size(); ++i)
      edm::LogInfo("SimG4CoreApplication") << "Tracker vol " << i << " name "
                                           << tracker[i]->GetName();
    for (unsigned int i=0; i<calo.size(); ++i)
      edm::LogInfo("SimG4CoreApplication") << "Calorimeter vol " <<i <<" name "
                                           << calo[i]->GetName();
    for (unsigned int i=0; i<muon.size(); ++i)
      edm::LogInfo("SimG4CoreApplication") << "Muon vol " << i << " name "
                                           << muon[i]->GetName();
  }

  const G4RegionStore * rs = G4RegionStore::GetInstance();
  unsigned int num = maxTimeNames.size();
  if (num > 0) {
    std::vector<double> tofs;
    if (rs) {
      std::vector<G4Region*>::const_iterator rcite;
      for (rcite = rs->begin(); rcite != rs->end(); rcite++) {
        for (unsigned int i=0; i<num; i++) {
          if ((*rcite)->GetName() == (G4String)(maxTimeNames[i])) {
            maxTimeRegions.push_back(*rcite);
            tofs.push_back(maxTrackTimes[i]);
            break;
          }
        }
        if (tofs.size() == num) break;
      }
    }
    for (unsigned int i=0; i<tofs.size(); i++) {
      maxTrackTimes[i] = tofs[i];
      G4String name = "Unknown";
      if (maxTimeRegions[i]) name = maxTimeRegions[i]->GetName();
      edm::LogInfo("SimG4CoreApplication") << name << " with pointer " 
                                           << maxTimeRegions[i]<<" KE cut off "
                                           << maxTrackTimes[i];
    }
  }

}

bool StackingAction::isThisVolume(const G4VTouchable* touch, 
                                  std::vector<G4LogicalVolume*> & lvs) const {

  bool flag = false;
  if (lvs.size() > 0 && touch !=0) {
    int level = ((touch->GetHistoryDepth())+1);
    if (level >= 3) {
      unsigned int  ii = (unsigned int)(level - 3);
      flag    = (std::count(lvs.begin(),lvs.end(),(touch->GetVolume(ii)->GetLogicalVolume())) != 0);
    }
  }
  return flag;
}

int StackingAction::isItPrimaryDecayProductOrConversion(const G4Track * aTrack,
                                                        const G4Track & mother) const {

  int flag = 0;
  TrackInformationExtractor extractor;
  const TrackInformation & motherInfo(extractor(mother));
  // Check whether mother is a primary
  if (motherInfo.isPrimary()) {
    if (aTrack->GetCreatorProcess()->GetProcessType() == fDecay) flag = 1;
    else if (aTrack->GetCreatorProcess()->GetProcessType() == fElectromagnetic &&
             aTrack->GetCreatorProcess()->GetProcessSubType() == fGammaConversion) flag = 2;
  }
  return flag;
}

int StackingAction::isItFromPrimary(const G4Track & mother, int flagIn) const {

  int flag = flagIn;
  if (flag != 1) {
    TrackInformationExtractor extractor;
    const TrackInformation & motherInfo(extractor(mother));
    if (motherInfo.isPrimary()) flag = 3;
  }
  return flag;
}

bool StackingAction::isItLongLived(const G4Track * aTrack) const {

  bool   flag = false;
  double time = (aTrack->GetGlobalTime())/nanosecond;
  double tofM = maxTrackTime;
  if (maxTimeRegions.size() > 0) {
    G4Region* reg = aTrack->GetTouchable()->GetVolume(0)->GetLogicalVolume()->GetRegion();
    for (unsigned int i=0; i<maxTimeRegions.size(); i++) {
      if (reg == maxTimeRegions[i]) {
        tofM = maxTrackTimes[i];
        break;
      }
    }
  }
  if (time > tofM) flag = true;
  return flag;
}