G4FastSimulationManager.cc

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//
// $Id: G4FastSimulationManager.cc 100945 2016-11-03 11:26:19Z gcosmo $
//
//---------------------------------------------------------------
//
//  G4FastSimulationManager.cc
//
//  Description:
//    Manages the Fast Simulation models attached to a envelope.
//
//  History:
//    Oct 97: Verderi && MoraDeFreitas - First Implementation.
//    ...
//    May 07: Move to parallel world scheme
//
//---------------------------------------------------------------

#include "G4FastSimulationManager.hh"
#include "G4GlobalFastSimulationManager.hh"
#include "G4PVPlacement.hh"
#include "G4TransportationManager.hh"

// --------------------------------------------------
// Constructor with envelope and IsUnique flag :
// --------------------------------------------------
//
G4FastSimulationManager::
G4FastSimulationManager(G4Envelope *anEnvelope,
                        G4bool IsUnique) :
  fFastTrack(anEnvelope,IsUnique),fTriggedFastSimulationModel(0),
  fLastCrossedParticle(0)
{
  // Communicates to the region that it becomes a
  // envelope and with this fast simulation manager.
  anEnvelope->SetFastSimulationManager(this);

  // Add itself to the GlobalFastSimulationManager 
  G4GlobalFastSimulationManager::GetGlobalFastSimulationManager()->
    AddFastSimulationManager(this);
}

// -----------
// Destructor:
// -----------
G4FastSimulationManager::~G4FastSimulationManager()
{
  //
  // Check out the Envelope about this pointer. If in use, 
  // resets the Logical Volume IsEnvelope flag to avoid clash.
  //
  if(fFastTrack.GetEnvelope()->GetFastSimulationManager()==this)
    fFastTrack.GetEnvelope()->ClearFastSimulationManager();
  // Remove itself from the GlobalFastSimulationManager 
  G4GlobalFastSimulationManager::GetGlobalFastSimulationManager()->
    RemoveFastSimulationManager(this);
}

// ---------------------------------------
// Methods to activate/inactivate models
//----------------------------------------

G4bool
G4FastSimulationManager::ActivateFastSimulationModel(const G4String& aName) 
{
  size_t iModel;

  // If the model is already active, do nothing.
  for (iModel=0; iModel<ModelList.size(); iModel++)
    if(ModelList[iModel]->GetName() == aName)
      return true;
  
  // Look for in the fInactivatedModels list, if found push_back it back to 
  // the ModelList
  for (iModel=0; iModel<fInactivatedModels.size(); iModel++)
    if(fInactivatedModels[iModel]->GetName() == aName) {
      ModelList.
        push_back (fInactivatedModels.removeAt(iModel));
      // forces the fApplicableModelList to be rebuild
      fLastCrossedParticle=0;
      return true;
    }
  return false;
}

G4bool
G4FastSimulationManager::InActivateFastSimulationModel(const G4String& aName)
{
  // Look for in the ModelList, if found remove from it and keep the pointer 
  // on the fInactivatedModels list.
  for (size_t iModel=0; iModel<ModelList.size(); iModel++)
    if(ModelList[iModel]->GetName() == aName) {
      fInactivatedModels.
        push_back (ModelList.removeAt(iModel));
      // forces the fApplicableModelList to be rebuild
      fLastCrossedParticle=0;
      return true;
    }
  return false;
}

G4VFastSimulationModel* 
G4FastSimulationManager::GetFastSimulationModel(const G4String& modelName,
                                                const G4VFastSimulationModel* previousFound,
                                                bool &foundPrevious) const
{
  G4VFastSimulationModel* model = 0;
  for (size_t iModel=0; iModel<ModelList.size(); iModel++)
    {
      if(ModelList[iModel]->GetName() == modelName)
        {
          if (previousFound == 0)
            {
              model = ModelList[iModel];
              break;
            }
          else
            {
              if (ModelList[iModel] == previousFound)
                {
                  foundPrevious = true;
                  continue;
                }
              if (foundPrevious)
                {
                  model = ModelList[iModel];
                  break;
                }
            }
        }
    }
  return model;
}


//------------------------------------------------------------------
// Interface trigger method for the G4ParameterisationManagerProcess
//------------------------------------------------------------------
//   G4bool GetFastSimulationManagerTrigger(const G4Track &);
//
//    This method is used to interface the G4FastSimulationManagerProcess
//    with the user Fast Simulation Models. It's called when the particle 
//    is inside the envelope.
//
//    It :
//
//      1) initialises the private members (fFastTrack and so
//         on);
//      2) loops on the IsApplicable() methods to find out the
//         ones should be applied.
//      2) for these, loops on the ModelTrigger() methods to find out 
//         perhaps one that must be applied just now.
//
//    If the a Fast Simulation Model is triggered then it returns 
//    true, false otherwise.
//
//-----------------------------------------------------------
G4bool 
G4FastSimulationManager::
PostStepGetFastSimulationManagerTrigger(const G4Track& track,
                                        const G4Navigator* theNavigator)
{
  size_t iModel;
  
  // If particle type changed re-build the fApplicableModelList.
  if(fLastCrossedParticle!=track.GetDefinition()) {
    fLastCrossedParticle=track.GetDefinition();
    fApplicableModelList.clear();
    // If Model List is empty, do nothing !
    if(ModelList.size()==0) return false;
    for (iModel=0; iModel<ModelList.size(); iModel++)
      if(ModelList[iModel]->IsApplicable(*(track.GetDefinition())))
        fApplicableModelList.push_back (ModelList[iModel]);
  }

  // If Applicable Model List is empty, do nothing !
  if(fApplicableModelList.size()==0) return false;

  // -- Register current track
  fFastTrack.SetCurrentTrack(track,theNavigator);

  // tests if particle are on the boundary and leaving,
  // in this case do nothing !
  if(fFastTrack.OnTheBoundaryButExiting()) return false;
  
  // Loops on the ModelTrigger() methods
  for (iModel=0; iModel<fApplicableModelList.size(); iModel++)
    
    //---------------------------------------------------
    // Asks the ModelTrigger method if it must be trigged now.
    //---------------------------------------------------
    
    if(fApplicableModelList[iModel]->ModelTrigger(fFastTrack)) {
      //--------------------------------------------------
      // The model will be applied. Initializes the G4FastStep 
      // with the current state of the G4Track and 
      // same usefull parameters.
      // In particular it does SetLocalEnergyDeposit(0.0).
      //--------------------------------------------------      
      fFastStep.Initialize(fFastTrack);
      
      // Keeps the FastSimulationModel pointer to call the
      // DoIt() method.
      fTriggedFastSimulationModel=fApplicableModelList[iModel];
      return true;
    }

  //--------------------------------------------
  // Nobody asks to gain control, returns false
  //--------------------------------------------
  return false;
}

G4VParticleChange* G4FastSimulationManager::InvokePostStepDoIt() 
{
  //  const G4FastTrack& parFastTrack=fFastTrack;
  fTriggedFastSimulationModel->DoIt(fFastTrack,fFastStep);
  return &fFastStep;
}

// -------------------------------------------------------------
// -- Mostly the same as above, in the case of AtRest particles:
// -------------------------------------------------------------
G4bool 
G4FastSimulationManager::AtRestGetFastSimulationManagerTrigger(const G4Track& track,
                                                               const G4Navigator* theNavigator)
{
  size_t iModel;
  
  // If particle type changed re-build the fApplicableModelList.
  if(fLastCrossedParticle!=track.GetDefinition()) {
    fLastCrossedParticle=track.GetDefinition();
    fApplicableModelList.clear();
    // If Model List is empty, do nothing !
    if(ModelList.size()==0) return false;
    for (iModel=0; iModel<ModelList.size(); iModel++)
      if(ModelList[iModel]->IsApplicable(*(track.GetDefinition())))
        fApplicableModelList.push_back (ModelList[iModel]);
  }
  
  // If Applicable Model List is empty, do nothing !
  if(fApplicableModelList.size()==0) return false;

  // -- Register current track
  fFastTrack.SetCurrentTrack(track,theNavigator);
  
  // -- (note: compared to the PostStepGetFastSimulationManagerTrigger,
  // --  the test to see if the particle is on the boundary but leaving
  // --  is irrelevant here)
  
  // Loops on the models to see if one of them wants to trigger:
  for (iModel=0; iModel < fApplicableModelList.size(); iModel++)
    if(fApplicableModelList[iModel]->AtRestModelTrigger(fFastTrack))
      {
        fFastStep.Initialize(fFastTrack);
        fTriggedFastSimulationModel=fApplicableModelList[iModel];
        return true;
      }
  
  //--------------------------------------------
  // Nobody asks to gain control, returns false
  //--------------------------------------------
  return false;
}

G4VParticleChange* G4FastSimulationManager::InvokeAtRestDoIt() 
{
  fTriggedFastSimulationModel->AtRestDoIt(fFastTrack,fFastStep);
  return &fFastStep;
}

void 
G4FastSimulationManager::ListTitle() const
{
  G4cout << fFastTrack.GetEnvelope()->GetName();
  //  if(GhostPlacements.size()!=0) G4cout << " (ghost)";
  if (fFastTrack.GetEnvelope()->GetWorldPhysical() == G4TransportationManager::GetTransportationManager()->GetNavigatorForTracking()->GetWorldVolume()) G4cout << " (mass geom.)";
  else G4cout << " (// geom.)";
                                                                                                                                                          
}

void 
G4FastSimulationManager::ListModels() const
{
  size_t iModel;

  G4cout << "Current Models for the ";
  ListTitle();
  G4cout << " envelope:\n";

  for (iModel=0; iModel<ModelList.size(); iModel++) 
    G4cout << "   " << ModelList[iModel]->GetName() << "\n";

  for (iModel=0; iModel<fInactivatedModels.size(); iModel++)
    G4cout << "   " << fInactivatedModels[iModel]->GetName() 
           << "(inactivated)\n";
}

void G4FastSimulationManager::ListModels(const G4String& modelName) const
{
  size_t iModel;
  G4int titled = 0;
  G4ParticleTable* theParticleTable = G4ParticleTable::GetParticleTable();
  
  // Active Models
  for ( iModel=0; iModel<ModelList.size(); iModel++ )
    if( ModelList[iModel]->GetName() == modelName || modelName == "all" )
      {
        if( !(titled++) )
          {
            G4cout << "In the envelope ";
            ListTitle();
            G4cout << ",\n";
          }
        G4cout << "  the model " << ModelList[iModel]->GetName()
               << " is applicable for :\n     ";
        
        G4int list_started=0;
        for ( G4int iParticle = 0; iParticle<theParticleTable->entries(); iParticle++)
          if( ModelList[iModel] -> IsApplicable( *(theParticleTable->GetParticle(iParticle))) )
            {
              if(list_started++) G4cout << ", ";
              G4cout << theParticleTable->
                GetParticle(iParticle)->GetParticleName();
            }
        G4cout <<G4endl;
      }
  
  // Inactive Models
  for (iModel=0; iModel<fInactivatedModels.size(); iModel++)
    if(fInactivatedModels[iModel]->GetName() == modelName || modelName == "all" )
      {
        if( !(titled++) )
          {
            G4cout << "In the envelope ";
            ListTitle();
            G4cout << ",\n";
          }
        G4cout << "  the model " << fInactivatedModels[iModel]->GetName()
               << " (inactivated) is applicable for :\n     ";
        
        G4int list_started=0;
        for ( G4int iParticle=0; iParticle<theParticleTable->entries(); iParticle++ )
          if( fInactivatedModels[iModel] -> IsApplicable( *(theParticleTable->GetParticle(iParticle))) )
            {
              if(list_started++) G4cout << ", ";
              G4cout << theParticleTable->
                GetParticle(iParticle)->GetParticleName();
            }
        G4cout <<G4endl;
      }
}

void G4FastSimulationManager::ListModels(const G4ParticleDefinition* particleDefinition) const
{
  size_t iModel;
  G4bool unique = true;
  
  // Active Models
  for ( iModel=0; iModel<ModelList.size(); iModel++ )
    if ( ModelList[iModel]->IsApplicable(*particleDefinition) )
      {
        G4cout << "Envelope ";
        ListTitle();
        G4cout << ", Model " 
               << ModelList[iModel]->GetName() 
               << "." << G4endl;
        // -- Verify unicity of model attached to particleDefinition:
        for ( auto jModel = iModel + 1; jModel < ModelList.size(); jModel++ )
          if ( ModelList[jModel]->IsApplicable(*particleDefinition) ) unique = false;
      }
  
  // Inactive Models
  for ( iModel=0; iModel<fInactivatedModels.size(); iModel++ )
    if( fInactivatedModels[iModel]->IsApplicable(*particleDefinition) )
      {
        G4cout << "Envelope ";
        ListTitle();
        G4cout << ", Model " 
               << fInactivatedModels[iModel]->GetName() 
               << " (inactivated)." << G4endl;
      }
  
  if( !unique )
    {
      G4ExceptionDescription ed;
      ed << "Two or more active Models are available for the same particle type, in the same envelope/region." << G4endl;
      G4Exception("G4FastSimulationManager::ListModels(const G4ParticleDefinition* particleDefinition) const",
                  "FastSim001",
                  JustWarning, ed,
                  "Models risk to exclude each other.");
    }
  unique=false;
}