BDSLinkStackingAction.cc

/* 
Beam Delivery Simulation (BDSIM) Copyright (C) BDSIM Collaboration, 2001 - 2026.
 
This file is part of BDSIM.
 
BDSIM is free software: you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published 
by the Free Software Foundation version 3 of the License.
 
BDSIM is distributed in the hope that it will be useful, but 
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with BDSIM.  If not, see <http://www.gnu.org/licenses/>.
*/
#include "BDSGlobalConstants.hh"
#include "BDSLinkStackingAction.hh"
#include "BDSPhysicsUtilities.hh"
#include "BDSRunManager.hh"
 
#include "G4Event.hh"
#include "G4Track.hh"
#include "G4TrackStatus.hh"
#include "G4Types.hh"
#include "G4ParticleDefinition.hh"
 
#include <set>
 
G4double BDSLinkStackingAction::kineticEnergyKilled = 0;
 
BDSLinkStackingAction::BDSLinkStackingAction(const BDSGlobalConstants* globals,
                                             const std::set<G4int>&    pdgIDsToAllowIn,
                                             G4bool                    protonsAndIonsOnlyIn,
                                             G4double                  minimumEKIn):
  pdgIDsToAllow(pdgIDsToAllowIn),
  emptyPDGIDs(pdgIDsToAllow.empty()),
  protonsAndIonsOnly(protonsAndIonsOnlyIn),
  minimumEK(minimumEKIn)
{
  killNeutrinos     = globals->KillNeutrinos();
  stopSecondaries   = globals->StopSecondaries();
  maxTracksPerEvent = globals->MaximumTracksPerEvent();
  if (maxTracksPerEvent == 0) // 0 is default -> no action - set maximum possible number
    {maxTracksPerEvent = LONG_MAX;}
}
 
BDSLinkStackingAction::~BDSLinkStackingAction()
{;}
 
G4ClassificationOfNewTrack BDSLinkStackingAction::ClassifyNewTrack(const G4Track * aTrack)
{
  G4ClassificationOfNewTrack result = fUrgent;
 
  if (aTrack->GetTrackID() > maxTracksPerEvent)
    {result = fKill;}
  else if (aTrack->GetKineticEnergy() <= minimumEK)
    {result = fKill;}
  else if (stopSecondaries && (aTrack->GetParentID() > 0))
    {result = fKill;}
  else
    {
      auto definition = aTrack->GetDefinition();
      G4int pdgID = definition->GetPDGEncoding();
 
      if (killNeutrinos)
        {
          if (pdgID == 12 || pdgID == 14 || pdgID == 16)
            {result = fKill;}
        }
 
      if (protonsAndIonsOnly)
        {
          if (!BDS::IsIon(definition) && pdgID != 2212)
            {result = fKill;}
          else if (pdgID == 2212)
            {result = fUrgent;}
        }
      else if (!emptyPDGIDs)
        {
          if (pdgIDsToAllow.find(pdgID) != pdgIDsToAllow.end())
            {result = fKill;}
        }
    }
 
  if (result == fKill)
    {kineticEnergyKilled += aTrack->GetKineticEnergy() * aTrack->GetWeight();}
  return result;
}