Gabriele Cosmo
106 lines
4.4 KiB
C++
106 lines
4.4 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// G4BOptnForceFreeFlight
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//
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// Class Description:
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//
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// A G4VBiasingOperation physics-based biasing operation.
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// If forces the physics process to not act on the track.
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// In this implementation (meant for the ForceCollision
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// operator) the free flight is done under zero weight for
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// the track, and the action is meant to accumulate the weight
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// change for making this uninteracting flight,
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// cumulatedWeightChange.
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// When the track reaches the current volume boundary, its
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// weight is restored with value: initialWeight * cumulatedWeightChange
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//
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// Author: Marc Verderi, November 2013.
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// --------------------------------------------------------------------
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#ifndef G4BOptnForceFreeFlight_hh
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#define G4BOptnForceFreeFlight_hh 1
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#include "G4VBiasingOperation.hh"
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#include "G4ForceCondition.hh"
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#include "G4ParticleChange.hh" // Should add a dedicated "weight change only"
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// particle change
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class G4ILawForceFreeFlight;
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class G4BOptnForceFreeFlight : public G4VBiasingOperation
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{
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public:
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// -- Constructor :
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G4BOptnForceFreeFlight(const G4String& name);
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// -- destructor:
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virtual ~G4BOptnForceFreeFlight();
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// -- Methods from G4VBiasingOperation interface:
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// -------------------------------------------
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// -- Used:
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virtual const G4VBiasingInteractionLaw*
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ProvideOccurenceBiasingInteractionLaw( const G4BiasingProcessInterface*,
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G4ForceCondition& );
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virtual void AlongMoveBy( const G4BiasingProcessInterface*,
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const G4Step*, G4double );
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virtual G4VParticleChange*
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ApplyFinalStateBiasing( const G4BiasingProcessInterface*,
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const G4Track*, const G4Step*, G4bool& );
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// -- Unused:
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virtual G4double DistanceToApplyOperation( const G4Track*,
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G4double, G4ForceCondition* ) { return DBL_MAX; }
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virtual G4VParticleChange* GenerateBiasingFinalState( const G4Track*,
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const G4Step* ) { return nullptr; }
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// -- Additional methods, specific to this class:
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// ----------------------------------------------
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// -- return concrete type of interaction law:
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G4ILawForceFreeFlight* GetForceFreeFlightLaw()
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{
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return fForceFreeFlightInteractionLaw;
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}
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// -- initialization for weight:
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void ResetInitialTrackWeight(G4double w)
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{
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fInitialTrackWeight = w;
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fCumulatedWeightChange = 1.0;
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}
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G4bool OperationComplete() const
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{
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return fOperationComplete;
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}
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private:
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G4ILawForceFreeFlight* fForceFreeFlightInteractionLaw = nullptr;
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G4double fCumulatedWeightChange = -1.0,
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fInitialTrackWeight = -1.0;
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G4ParticleChange fParticleChange;
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G4bool fOperationComplete = true;
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};
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#endif
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