G4ParticleChangeForDecay.cc

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//
// G4ParticleChangeForDecay class implementation
//
// Author: Hisaya Kurashige, 23 March 1998  
// --------------------------------------------------------------------
 
#include "G4ParticleChangeForDecay.hh"
#include "G4SystemOfUnits.hh"
#include "G4Track.hh"
#include "G4Step.hh"
#include "G4DynamicParticle.hh"
#include "G4ExceptionSeverity.hh"
 
// --------------------------------------------------------------------
G4ParticleChangeForDecay::G4ParticleChangeForDecay()
{}
 
// --------------------------------------------------------------------
void G4ParticleChangeForDecay::Initialize(const G4Track& track)
{
  // use base class's method at first
  G4VParticleChange::Initialize(track);
 
  // set TimeChange equal to local time of the parent track
  theLocalTime0 = theTimeChange = track.GetLocalTime();
 
  // set initial Local/Global time of the parent track
  theGlobalTime0 = track.GetGlobalTime();
 
  // set the Polarization equal to those of the parent track
  thePolarizationChange = track.GetDynamicParticle()->GetPolarization();
}
 
// --------------------------------------------------------------------
G4Step* G4ParticleChangeForDecay::UpdateStepForPostStep(G4Step* pStep)
{
  G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
 
  if(isParentWeightProposed)
  {
    pPostStepPoint->SetWeight(theParentWeight);
  }
  // update polarization
  pPostStepPoint->SetPolarization(thePolarizationChange);
 
  // update the G4Step specific attributes
  return UpdateStepInfo(pStep);
}
 
// --------------------------------------------------------------------
G4Step* G4ParticleChangeForDecay::UpdateStepForAtRest(G4Step* pStep)
{
  // A physics process always calculates the final state of the particle
 
  G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
 
  // update polarization
  pPostStepPoint->SetPolarization(thePolarizationChange);
 
  // update time
  pPostStepPoint->SetGlobalTime(GetGlobalTime());
  pPostStepPoint->SetLocalTime(theTimeChange);
  pPostStepPoint->AddProperTime(theTimeChange - theLocalTime0);
 
#ifdef G4VERBOSE
  if(debugFlag) { CheckIt(*theCurrentTrack); }
#endif
 
  if(isParentWeightProposed)
    pPostStepPoint->SetWeight(theParentWeight);
 
  //  Update the G4Step specific attributes
  return UpdateStepInfo(pStep);
}
 
// --------------------------------------------------------------------
void G4ParticleChangeForDecay::DumpInfo() const
{
  // Show header
  G4VParticleChange::DumpInfo();
 
  G4long oldprc = G4cout.precision(8);
  G4cout << "      -----------------------------------------------" << G4endl;
  G4cout << "    G4ParticleChangeForDecay proposes: " << G4endl;
  G4cout << "    Proposed local Time (ns): " << std::setw(20)
         << theTimeChange / ns << G4endl;
  G4cout << "    Initial local Time (ns) : " << std::setw(20)
         << theLocalTime0 / ns << G4endl;
  G4cout << "    Initial global Time (ns): " << std::setw(20)
         << theGlobalTime0 / ns << G4endl;
  G4cout << "    Current global Time (ns): " << std::setw(20)
         << theCurrentTrack->GetGlobalTime() / ns << G4endl;
  G4cout.precision(oldprc);
}
 
// --------------------------------------------------------------------
G4bool G4ParticleChangeForDecay::CheckIt(const G4Track& aTrack)
{
  // local time should not go back
  G4bool itsOK = true;
  if(theTimeChange < theLocalTime0)
  {
    itsOK         = false;
    ++nError;
#ifdef G4VERBOSE
    if(nError < maxError)
    {
      G4cout << "  G4ParticleChangeForDecay::CheckIt    : ";
      G4cout << "the local time goes back  !!"
         << "  Difference:  " << (theTimeChange - theLocalTime0) / ns 
             << "[ns] " << G4endl;
      G4cout << "initial local time " << theLocalTime0 / ns << "[ns] "
         << "initial global time " << theGlobalTime0 / ns << "[ns] "
         << G4endl;
    }
#endif
    theTimeChange = theLocalTime0;
  }
 
  if(!itsOK)
  {
    if(nError < maxError)
    {
#ifdef G4VERBOSE
      // dump out information of this particle change
      DumpInfo();
#endif
      G4Exception("G4ParticleChangeForDecay::CheckIt()", "TRACK005",
                  JustWarning, "time is illegal");
    }
  }
 
  return (itsOK) && G4VParticleChange::CheckIt(aTrack);
}