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/// \file GB05BOptnSplitAndKillByCrossSection.hh
/// \brief Definition of the GB05BOptnSplitAndKillByCrossSection class

#ifndef GB05BOptnSplitAndKillByCrossSection_hh
#define GB05BOptnSplitAndKillByCrossSection_hh 1

#include "G4ParticleChange.hh"
#include "G4VBiasingOperation.hh"

class GB05BOptnSplitAndKillByCrossSection : public G4VBiasingOperation
{
  public:
    // -- Constructor :
    GB05BOptnSplitAndKillByCrossSection(G4String name);
    // -- destructor:
    ~GB05BOptnSplitAndKillByCrossSection() override;

  public:
    // ----------------------------------------------
    // -- Methods from G4VBiasingOperation interface:
    // ----------------------------------------------
    // -- Unused:
    const G4VBiasingInteractionLaw*
    ProvideOccurenceBiasingInteractionLaw(const G4BiasingProcessInterface*, G4ForceCondition&) final
    {
      return nullptr;
    }
    G4VParticleChange* ApplyFinalStateBiasing(const G4BiasingProcessInterface*, const G4Track*,
                                              const G4Step*, G4bool&) final
    {
      return nullptr;
    }

    // -- Used methods ("non-physics biasing methods"):
    // ------------------------------------------------
    // -- Method to return the distance or the condition under which
    // -- requesting the biasing.
    // -- Here this distance will be sampled according the exponential
    // -- interaction law, using the interaction length passed to the
    // -- method SetInteractionLength(G4double)  below.
    G4double DistanceToApplyOperation(const G4Track*, G4double, G4ForceCondition* condition) final;
    // -- Method the generate the final state, which is made of the primary
    // -- with half of its original weight, and a clone of it.
    G4VParticleChange* GenerateBiasingFinalState(const G4Track*, const G4Step*) final;

    // -- Specific to this example:
    // ----------------------------
    void SetInteractionLength(G4double interactionLength)
    {
      fInteractionLength = interactionLength;
    }

  private:
    G4ParticleChange fParticleChange;
    G4double fInteractionLength;
};

#endif
