P6DExtDecayerPhysics.cc

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//
// $Id: P6DExtDecayerPhysics.cc,v 1.3 2015/01/05 23:49:39 mccumber Exp $
//

#include "P6DExtDecayerPhysics.hh"
#include "G4Pythia6Decayer.hh"

#include <Geant4/G4VPhysicsConstructor.hh>
#include <Geant4/G4ParticleDefinition.hh>
#include <Geant4/G4ProcessManager.hh>
#include <Geant4/G4Decay.hh>

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// hack for Geant 10.03.p03
// Geant 10.02.p02 has this defined
#ifndef aParticleIterator
#define aParticleIterator ((subInstanceManager.offset[g4vpcInstanceID])._aParticleIterator)
#endif


P6DExtDecayerPhysics::P6DExtDecayerPhysics(const G4String& name)
  : G4VPhysicsConstructor(name),
    _active_force_decay(false),
    _force_decay_type(kAll)
{
}

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P6DExtDecayerPhysics::~P6DExtDecayerPhysics() 
{
}

//
// protected methods
//

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void P6DExtDecayerPhysics::ConstructParticle()
{
}

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void P6DExtDecayerPhysics::ConstructProcess()
{

  // Create Geant4 external decayer
  G4Pythia6Decayer* extDecayer = new G4Pythia6Decayer();
  extDecayer->SetVerboseLevel(0); 
 
  aParticleIterator->reset();
  int decayer_used = 0;
  while ((*aParticleIterator)())
  {    
    G4ParticleDefinition* particle = aParticleIterator->value();
    G4ProcessManager* pmanager = particle->GetProcessManager();
    
    if ( verboseLevel > 1 ) {
      G4cout << "Setting ext decayer for: " 
             <<  aParticleIterator->value()->GetParticleName() 
             << G4endl;
    } 
    
    G4ProcessVector* processVector = pmanager->GetProcessList();
    for (G4int i=0; i<processVector->length(); i++) {
    
      G4Decay* decay = dynamic_cast<G4Decay*>((*processVector)[i]);
      if ( decay )
        {
          // The extDecayer will be deleted in G4Decay destructor
          // increment counter in case we want to print out stats
          // for whatever reason (non null means it is used and
          // must not be deleted)
          decay->SetExtDecayer(extDecayer);
          decayer_used++;
        }
    }              
  }

  if (_active_force_decay) {
    extDecayer->ForceDecayType(_force_decay_type);
  }

  // If the extDecayer isn't used for this particle we need to delete it here
  // as far as I see this never happens but this makes coverity happy
  if (! decayer_used)
    {
      delete  extDecayer;
    }
  if ( verboseLevel > 0 ) {
    G4cout << "External decayer physics constructed." << G4endl;
  }  
}

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