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/G4Decay.hh>
#include <Geant4/G4ParticleDefinition.hh>
#include <Geant4/G4ParticleTable.hh>  // for G4ParticleTable::G4PTblDi...
#include <Geant4/G4ProcessManager.hh>
#include <Geant4/G4ProcessVector.hh>  // for G4ProcessVector
#include <Geant4/G4Types.hh>          // for G4int
#include <Geant4/G4VPhysicsConstructor.hh>
#include <Geant4/G4VProcess.hh>  // for G4VProcess
#include <Geant4/G4Version.hh>

#include <ostream>  // for operator<<, basic_ostream
#include <string>   // for operator<<

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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)
    {
      std::cout << "Setting ext decayer for: "
             << aParticleIterator->value()->GetParticleName()
             << std::endl;
    }

    G4ProcessVector* processVector = pmanager->GetProcessList();
#if G4VERSION_NUMBER >= 1060
    for (size_t i = 0; i < processVector->length(); i++)
#else
    for (G4int i = 0; i < processVector->length(); i++)
#endif
    {
      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)
  {
    std::cout << "External decayer physics constructed." << std::endl;
  }
}

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