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// $Id: G4NeutronTrackingCut.cc,v 1.6 2010/06/04 15:28:35 gunter Exp $
// GEANT4 tag $Name: geant4-09-04-beta-01 $
//
//---------------------------------------------------------------------------
//
// ClassName:   G4NeutronTrackingCut
//
// Author: Nov 2006 G.Folger
//
//
//----------------------------------------------------------------------------
//

#include "G4NeutronTrackingCut.hh"

#include "G4ParticleDefinition.hh"
#include "G4ProcessManager.hh"

#include "G4Neutron.hh"
#include "G4NeutronKiller.hh"

G4NeutronTrackingCut::G4NeutronTrackingCut(G4int ver)
  :  G4VPhysicsConstructor("neutronTrackingCut")
   , verbose(ver), wasActivated(false)
{
  timeLimit          = 10.*microsecond;
  kineticEnergyLimit = 0.0;
}

G4NeutronTrackingCut::G4NeutronTrackingCut(const G4String& name, G4int ver)
  :  G4VPhysicsConstructor(name), verbose(ver), wasActivated(false)
{
  timeLimit          = 10.*microsecond;
  kineticEnergyLimit = 0.0;
}

G4NeutronTrackingCut::~G4NeutronTrackingCut()
{
  if(wasActivated) 
  {
    delete pNeutronKiller;
  }    
}

void G4NeutronTrackingCut::ConstructParticle()
{
  G4Neutron::NeutronDefinition();
}

void G4NeutronTrackingCut::ConstructProcess()
{
  if(wasActivated) return;
  wasActivated = true;

  // Add Process

  pNeutronKiller = new G4NeutronKiller();
  G4ParticleDefinition * particle = G4Neutron::Neutron();
  G4ProcessManager * pmanager = particle->GetProcessManager();

  if(verbose > 0) {
    G4cout << "### Adding tracking cuts for " << particle->GetParticleName() 
	   << "  TimeCut(ns)= " << timeLimit/ns 
	   << "  KinEnergyCut(MeV)= " <<  kineticEnergyLimit/MeV
	   <<  G4endl;
  }
  pmanager -> AddDiscreteProcess(pNeutronKiller);
  pNeutronKiller->SetKinEnergyLimit(kineticEnergyLimit);
  pNeutronKiller->SetTimeLimit(timeLimit);
}