Gabriele Cosmo
122 lines
5.2 KiB
C++
122 lines
5.2 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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// G4BOptnForceCommonTruncatedExp
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//
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// Class Description:
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//
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// A G4VBiasingOperation physics-based biasing operation. It
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// handles several processes together, biasing on the total
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// cross-section of these processes (instead of biasing them
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// individually).
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// The biasing interaction law is a truncated exponential
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// one, driven by the total cross-section and which extends
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// in the range [0,L].
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// Process are registered with the AddCrossSection() method.
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// As cross-sections are all known at the end of the
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// PostStepGPIL loop, the step limitation is made at the
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// AlongStepGPIL level.
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//
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// Author: Marc Verderi, November 2013.
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// --------------------------------------------------------------------
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#ifndef G4BOptnForceCommonTruncatedExp_hh
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#define G4BOptnForceCommonTruncatedExp_hh 1
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#include "G4VBiasingOperation.hh"
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#include "G4ThreeVector.hh"
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#include "G4ParticleChangeForNothing.hh"
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#include <map>
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class G4ILawCommonTruncatedExp;
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class G4ILawForceFreeFlight;
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class G4BOptnForceCommonTruncatedExp : public G4VBiasingOperation
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{
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public:
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// -- Constructor :
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G4BOptnForceCommonTruncatedExp(const G4String& name);
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// -- destructor:
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virtual ~G4BOptnForceCommonTruncatedExp();
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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*, G4ForceCondition& );
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virtual G4double
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ProposeAlongStepLimit( const G4BiasingProcessInterface* ) { return DBL_MAX; }
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virtual G4GPILSelection
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ProposeGPILSelection( const G4GPILSelection processSelection );
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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
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DistanceToApplyOperation( const G4Track*,
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G4double, G4ForceCondition* ) { return DBL_MAX; }
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virtual G4VParticleChange*
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GenerateBiasingFinalState(const G4Track*, 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 laws:
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G4ILawCommonTruncatedExp* GetCommonTruncatedExpLaw()
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{
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return fCommonTruncatedExpLaw;
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}
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G4ILawForceFreeFlight* GetForceFreeFlightLaw()
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{
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return fForceFreeFlightLaw;
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}
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void Initialize( const G4Track* );
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void UpdateForStep( const G4Step* );
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void Sample();
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const G4ThreeVector& GetInitialMomentum() const { return fInitialMomentum; }
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G4double GetMaximumDistance() const { return fMaximumDistance; }
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void ChooseProcessToApply();
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const G4VProcess* GetProcessToApply() const { return fProcessToApply; }
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void AddCrossSection( const G4VProcess*, G4double );
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std::size_t GetNumberOfSharing() const { return fNumberOfSharing; }
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void SetInteractionOccured( G4bool b ) { fInteractionOccured = b; }
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G4bool GetInteractionOccured() const { return fInteractionOccured; }
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private:
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G4ILawCommonTruncatedExp* fCommonTruncatedExpLaw = nullptr;
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G4ILawForceFreeFlight* fForceFreeFlightLaw = nullptr;
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G4double fTotalCrossSection = 0.0;
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std::map < const G4VProcess*, G4double > fCrossSections;
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std::size_t fNumberOfSharing = 0;
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const G4VProcess* fProcessToApply = nullptr;
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G4bool fInteractionOccured = false;
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G4ThreeVector fInitialMomentum;
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G4double fMaximumDistance = -1.0;
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G4ParticleChangeForNothing fDummyParticleChange;
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};
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#endif
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