Gabriele Cosmo
212 lines
6.4 KiB
C++
212 lines
6.4 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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// $Id: G4EmBiasingManager.hh 95657 2016-02-17 13:03:36Z gcosmo $
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//
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// -------------------------------------------------------------------
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//
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// GEANT4 Class header file
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//
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//
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// File name: G4EmBiasingManager
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//
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// Author: Vladimir Ivanchenko
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//
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// Creation date: 28.07.2011
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//
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// Modifications:
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//
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// Class Description:
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//
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// It is a class providing step limit for forced process biasing
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// -------------------------------------------------------------------
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//
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#ifndef G4EmBiasingManager_h
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#define G4EmBiasingManager_h 1
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#include "globals.hh"
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#include "G4ParticleDefinition.hh"
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#include "G4DynamicParticle.hh"
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#include "Randomize.hh"
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#include <vector>
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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class G4Region;
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class G4Track;
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class G4VEnergyLossProcess;
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class G4VEmModel;
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class G4MaterialCutsCouple;
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class G4ParticleChangeForLoss;
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class G4ParticleChangeForGamma;
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class G4EmBiasingManager
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{
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public:
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G4EmBiasingManager();
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~G4EmBiasingManager();
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void Initialise(const G4ParticleDefinition& part,
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const G4String& procName, G4int verbose);
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// default parameters are possible
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void ActivateForcedInteraction(G4double length = 0.0,
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const G4String& r = "");
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// no default parameters
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void ActivateSecondaryBiasing(const G4String& region, G4double factor,
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G4double energyLimit);
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// return forced step limit
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G4double GetStepLimit(G4int coupleIdx, G4double previousStep);
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// return weight of splitting or Russian roulette
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// G4DynamicParticle may be deleted
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// two functions are required because of the different ParticleChange
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// ApplySecondaryBiasing() are wrappers
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// for G4VEmProcess
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G4double ApplySecondaryBiasing(std::vector<G4DynamicParticle*>&,
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const G4Track& track,
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G4VEmModel* currentModel,
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G4ParticleChangeForGamma* pParticleChange,
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G4double& eloss,
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G4int coupleIdx,
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G4double tcut,
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G4double safety = 0.0);
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// for G4VEnergyLossProcess
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G4double ApplySecondaryBiasing(std::vector<G4DynamicParticle*>&,
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const G4Track& track,
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G4VEmModel* currentModel,
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G4ParticleChangeForLoss* pParticleChange,
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G4double& eloss,
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G4int coupleIdx,
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G4double tcut,
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G4double safety = 0.0);
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// for G4VEnergyLossProcess
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G4double ApplySecondaryBiasing(std::vector<G4Track*>&,
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G4int coupleIdx);
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inline G4bool SecondaryBiasingRegion(G4int coupleIdx);
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inline G4bool ForcedInteractionRegion(G4int coupleIdx);
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inline void ResetForcedInteraction();
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private:
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void ApplyRangeCut(std::vector<G4DynamicParticle*>& vd,
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const G4Track& track,
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G4double& eloss,
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G4double safety);
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G4double ApplySplitting(std::vector<G4DynamicParticle*>& vd,
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const G4Track& track,
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G4VEmModel* currentModel,
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G4int index,
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G4double tcut);
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inline G4double ApplyRussianRoulette(std::vector<G4DynamicParticle*>& vd,
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G4int index);
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// hide copy constructor and assignment operator
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G4EmBiasingManager(G4EmBiasingManager &) = delete;
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G4EmBiasingManager & operator=(const G4EmBiasingManager &right) = delete;
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G4int nForcedRegions;
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G4int nSecBiasedRegions;
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std::vector<const G4Region*> forcedRegions;
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std::vector<G4double> lengthForRegion;
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std::vector<const G4Region*> secBiasedRegions;
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std::vector<G4double> secBiasedWeight;
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std::vector<G4double> secBiasedEnegryLimit;
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std::vector<G4int> nBremSplitting;
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std::vector<G4int> idxForcedCouple;
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std::vector<G4int> idxSecBiasedCouple;
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std::vector<G4DynamicParticle*> tmpSecondaries;
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G4VEnergyLossProcess* eIonisation;
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const G4ParticleDefinition* theElectron;
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G4double fSafetyMin;
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G4double currentStepLimit;
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G4bool startTracking;
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};
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inline G4bool
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G4EmBiasingManager::SecondaryBiasingRegion(G4int coupleIdx)
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{
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G4bool res = false;
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if(nSecBiasedRegions > 0) {
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if(idxSecBiasedCouple[coupleIdx] >= 0) { res = true; }
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}
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return res;
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}
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inline G4bool G4EmBiasingManager::ForcedInteractionRegion(G4int coupleIdx)
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{
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G4bool res = false;
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if(nForcedRegions > 0) {
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if(idxForcedCouple[coupleIdx] >= 0) { res = true; }
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}
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return res;
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}
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inline void G4EmBiasingManager::ResetForcedInteraction()
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{
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startTracking = true;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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inline G4double
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G4EmBiasingManager::ApplyRussianRoulette(std::vector<G4DynamicParticle*>& vd,
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G4int index)
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{
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size_t n = vd.size();
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G4double weight = secBiasedWeight[index];
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for(size_t k=0; k<n; ++k) {
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if(G4UniformRand()*weight > 1.0) {
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const G4DynamicParticle* dp = vd[k];
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delete dp;
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vd[k] = nullptr;
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}
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}
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return weight;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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#endif
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