G4ParticleChangeForGamma.cc

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// G4ParticleChangeForGamma class implementation
//
// Author: Hisaya Kurashige, 23 March 1998  
// Revision: Vladimir Ivantchenko, 15 April 2005
// --------------------------------------------------------------------
 
#include "G4ParticleChangeForGamma.hh"
#include "G4SystemOfUnits.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4DynamicParticle.hh"
#include "G4ExceptionSeverity.hh"
 
// --------------------------------------------------------------------
G4ParticleChangeForGamma::G4ParticleChangeForGamma()
  : G4VParticleChange()
{
  theSteppingControlFlag = NormalCondition;
  // Disable flag that is enabled in G4VParticleChange if G4VERBOSE.
  debugFlag              = false;
}
 
// --------------------------------------------------------------------
G4ParticleChangeForGamma::~G4ParticleChangeForGamma()
{
}
 
// --------------------------------------------------------------------
G4ParticleChangeForGamma::
G4ParticleChangeForGamma(const G4ParticleChangeForGamma& right)
  : G4VParticleChange(right)
{
  currentTrack              = right.currentTrack;
  proposedKinEnergy         = right.proposedKinEnergy;
  proposedMomentumDirection = right.proposedMomentumDirection;
  proposedPolarization      = right.proposedPolarization;
}
 
// --------------------------------------------------------------------
G4ParticleChangeForGamma&
G4ParticleChangeForGamma::operator=(const G4ParticleChangeForGamma& right)
{
  if(this != &right)
  {
    if(theNumberOfSecondaries > 0)
    {
      for(G4int index = 0; index < theNumberOfSecondaries; ++index)
      {
        if((*theListOfSecondaries)[index])
          delete(*theListOfSecondaries)[index];
      }
    }
    delete theListOfSecondaries;
    theListOfSecondaries   = new G4TrackFastVector();
    theNumberOfSecondaries = right.theNumberOfSecondaries;
    for(G4int index = 0; index < theNumberOfSecondaries; ++index)
    {
      G4Track* newTrack = new G4Track(*((*right.theListOfSecondaries)[index]));
      theListOfSecondaries->SetElement(index, newTrack);
    }
 
    theStatusChange        = right.theStatusChange;
    theLocalEnergyDeposit  = right.theLocalEnergyDeposit;
    theSteppingControlFlag = right.theSteppingControlFlag;
    theParentWeight        = right.theParentWeight;
 
    currentTrack              = right.currentTrack;
    proposedKinEnergy         = right.proposedKinEnergy;
    proposedMomentumDirection = right.proposedMomentumDirection;
    proposedPolarization      = right.proposedPolarization;
  }
  return *this;
}
 
// --------------------------------------------------------------------
void G4ParticleChangeForGamma::AddSecondary(G4DynamicParticle* aParticle)
{
  // create track
  G4Track* aTrack = new G4Track(aParticle, currentTrack->GetGlobalTime(),
                                currentTrack->GetPosition());
 
  // touchable handle is copied to keep the pointer
  aTrack->SetTouchableHandle(currentTrack->GetTouchableHandle());
 
  // add a secondary
  G4VParticleChange::AddSecondary(aTrack);
}
 
// --------------------------------------------------------------------
G4Step* G4ParticleChangeForGamma::UpdateStepForAtRest(G4Step* pStep)
{
  pStep->AddTotalEnergyDeposit(theLocalEnergyDeposit);
  pStep->SetStepLength(0.0);
 
  if(isParentWeightProposed)
  {
    pStep->GetPostStepPoint()->SetWeight(theParentWeight);
  }
 
  return pStep;
}
 
// --------------------------------------------------------------------
G4Step* G4ParticleChangeForGamma::UpdateStepForPostStep(G4Step* pStep)
{
  G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
  G4Track* pTrack             = pStep->GetTrack();
 
  pPostStepPoint->SetKineticEnergy(proposedKinEnergy);
  pPostStepPoint->SetMomentumDirection(proposedMomentumDirection);
  pPostStepPoint->SetPolarization(proposedPolarization);
 
  // update velocity for scattering process and particles with mass
  if(proposedKinEnergy > 0.0)
  {
    if(pTrack->GetParticleDefinition()->GetPDGMass() > 0.0)
    {
      pPostStepPoint->SetVelocity(pTrack->CalculateVelocity());
    }
  }
 
  if(isParentWeightProposed)
  {
    pPostStepPoint->SetWeight(theParentWeight);
  }
 
  pStep->AddTotalEnergyDeposit(theLocalEnergyDeposit);
  pStep->AddNonIonizingEnergyDeposit(theNonIonizingEnergyDeposit);
  return pStep;
}
 
// --------------------------------------------------------------------
void G4ParticleChangeForGamma::DumpInfo() const
{
  // use base-class DumpInfo
  G4VParticleChange::DumpInfo();
 
  G4int oldprc = G4cout.precision(3);
  G4cout << "        Kinetic Energy (MeV): " << std::setw(20)
         << proposedKinEnergy / MeV << G4endl;
  G4cout << "        Momentum Direction: " << std::setw(20)
         << proposedMomentumDirection << G4endl;
  G4cout << "        Polarization: " << std::setw(20) << proposedPolarization
         << G4endl;
  G4cout.precision(oldprc);
}
 
// --------------------------------------------------------------------
G4bool G4ParticleChangeForGamma::CheckIt(const G4Track& aTrack)
{
  G4bool itsOK         = true;
  G4bool exitWithError = false;
 
  G4double accuracy;
 
  // Energy should not be lager than initial value
  accuracy = (proposedKinEnergy - aTrack.GetKineticEnergy()) / MeV;
  if(accuracy > accuracyForWarning)
  {
    itsOK         = false;
    exitWithError = (accuracy > accuracyForException);
#ifdef G4VERBOSE
    G4cout << "G4ParticleChangeForGamma::CheckIt: ";
    G4cout << "KinEnergy become larger than the initial value!"
           << "  Difference:  " << accuracy << "[MeV] " << G4endl;
    G4cout << aTrack.GetDefinition()->GetParticleName()
           << " E=" << aTrack.GetKineticEnergy() / MeV
           << " pos=" << aTrack.GetPosition().x() / m << ", "
           << aTrack.GetPosition().y() / m << ", "
           << aTrack.GetPosition().z() / m << G4endl;
#endif
  }
 
  // dump out information of this particle change
#ifdef G4VERBOSE
  if(!itsOK) { DumpInfo(); }
#endif
 
  // Exit with error
  if(exitWithError)
  {
    G4Exception("G4ParticleChangeForGamma::CheckIt()", "TRACK004",
                EventMustBeAborted, "energy was  illegal");
  }
 
  // correction
  if(!itsOK)
  {
    proposedKinEnergy = aTrack.GetKineticEnergy();
  }
 
  itsOK = (itsOK) && G4VParticleChange::CheckIt(aTrack);
  return itsOK;
}