| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | // $Id: G4AdjointAlongStepWeightCorrection.cc,v 1.5 2009/11/23 09:02:35 gcosmo Exp $
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| 27 | // GEANT4 tag $Name: geant4-09-03 $
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| 28 | //
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| 29 | #include "G4AdjointAlongStepWeightCorrection.hh"
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| 30 | #include "G4Step.hh"
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| 31 | #include "G4ParticleDefinition.hh"
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| 32 | #include "G4VParticleChange.hh"
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| 33 | #include "G4AdjointCSManager.hh"
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| 34 |
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| 35 | ///////////////////////////////////////////////////////
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| 36 | //
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| 37 |
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| 38 | G4AdjointAlongStepWeightCorrection::G4AdjointAlongStepWeightCorrection(const G4String& name,
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| 39 | G4ProcessType type): G4VContinuousProcess(name, type)
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| 40 | {fParticleChange = new G4ParticleChange();
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| 41 | }
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| 42 |
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| 43 | ///////////////////////////////////////////////////////
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| 44 | //
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| 45 |
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| 46 | G4AdjointAlongStepWeightCorrection::~G4AdjointAlongStepWeightCorrection()
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| 47 | {;
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| 48 | }
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| 49 | ///////////////////////////////////////////////////////
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| 50 | //
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| 51 | void G4AdjointAlongStepWeightCorrection::PreparePhysicsTable(
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| 52 | const G4ParticleDefinition& )
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| 53 | {
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| 54 | ;
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| 55 | }
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| 56 | ///////////////////////////////////////////////////////
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| 57 | //
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| 58 |
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| 59 | void G4AdjointAlongStepWeightCorrection::BuildPhysicsTable(const G4ParticleDefinition& )
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| 60 | {;
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| 61 | }
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| 62 | ///////////////////////////////////////////////////////
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| 63 | //
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| 64 | G4VParticleChange* G4AdjointAlongStepWeightCorrection::AlongStepDoIt(const G4Track& track,
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| 65 | const G4Step& step)
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| 66 | {
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| 67 |
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| 68 | fParticleChange->Initialize(track);
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| 69 |
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| 70 | // Get the actual (true) Step length
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| 71 | //----------------------------------
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| 72 | G4double length = step.GetStepLength();
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| 73 |
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| 74 |
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| 75 | G4double Tkin = step.GetPostStepPoint()->GetKineticEnergy();
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| 76 | G4ParticleDefinition* thePartDef= const_cast<G4ParticleDefinition*> (track.GetDynamicParticle()->GetDefinition());
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| 77 | G4double weight_correction=G4AdjointCSManager::GetAdjointCSManager()->GetContinuousWeightCorrection(thePartDef,
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| 78 | preStepKinEnergy,Tkin, currentCouple,length);
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| 79 |
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| 80 |
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| 81 |
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| 82 | G4double new_weight=weight_correction*track.GetWeight();
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| 83 |
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| 84 | //if (weight_correction >2.) new_weight=1.e-300;
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| 85 |
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| 86 |
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| 87 | //The following test check for zero weight.
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| 88 | //This happens after weight correction of gamma for photo electric effect.
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| 89 | //When the new weight is 0 it will be later on consider as nan by G4.
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| 90 | //Therefore we do put a lower limit of 1.e-300. for new_weight
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| 91 | //Correction by L.Desorgher on 15 July 2009
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| 92 | #ifdef WIN32
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| 93 | if (!!_isnan(new_weight) || new_weight==0){
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| 94 | #else
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| 95 | if (std::isnan(new_weight) || new_weight==0){
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| 96 | #endif
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| 97 | //G4cout<<new_weight<<'\t'<<weight_correction<<'\t'<<track.GetWeight()<<G4endl;
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| 98 | new_weight=1.e-300;
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| 99 | }
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| 100 |
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| 101 | //G4cout<<new_weight<<'\t'<<weight_correction<<'\t'<<track.GetWeight()<<G4endl;
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| 102 | fParticleChange->SetParentWeightByProcess(false);
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| 103 | fParticleChange->SetSecondaryWeightByProcess(false);
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| 104 | fParticleChange->ProposeParentWeight(new_weight);
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| 105 |
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| 106 |
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| 107 | return fParticleChange;
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| 108 |
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| 109 | }
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| 110 | ///////////////////////////////////////////////////////
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| 111 | //
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| 112 | G4double G4AdjointAlongStepWeightCorrection::GetContinuousStepLimit(const G4Track& track,
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| 113 | G4double , G4double , G4double& )
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| 114 | {
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| 115 | G4double x = DBL_MAX;
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| 116 | DefineMaterial(track.GetMaterialCutsCouple());
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| 117 | preStepKinEnergy = track.GetKineticEnergy();
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| 118 | return x;
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| 119 | }
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