| 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: G4VMscModel.cc,v 1.10 2009/02/24 09:56:03 vnivanch Exp $
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| 27 | // GEANT4 tag $Name: geant4-09-02-ref-02 $
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| 28 | //
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| 29 | // -------------------------------------------------------------------
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| 30 | //
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| 31 | // GEANT4 Class file
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| 32 | //
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| 33 | //
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| 34 | // File name: G4VMscModel
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| 35 | //
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| 36 | // Author: Vladimir Ivanchenko
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| 37 | //
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| 38 | // Creation date: 07.03.2008
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| 39 | //
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| 40 | // Modifications:
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| 41 | //
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| 42 | //
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| 43 | // Class Description:
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| 44 | //
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| 45 | // General interface to msc models
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| 46 |
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| 47 | // -------------------------------------------------------------------
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| 48 | //
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| 49 |
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| 50 | #include "G4VMscModel.hh"
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| 51 | #include "G4ParticleChangeForMSC.hh"
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| 52 | #include "G4TransportationManager.hh"
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| 53 |
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| 54 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 55 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 56 |
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| 57 | G4VMscModel::G4VMscModel(const G4String& nam):
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| 58 | G4VEmModel(nam),
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| 59 | safetyHelper(0),
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| 60 | facrange(0.02),
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| 61 | facgeom(2.5),
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| 62 | facsafety(0.25),
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| 63 | skin(3.0),
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| 64 | dtrl(0.05),
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| 65 | lambdalimit(mm),
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| 66 | geommax(1.e50*mm),
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| 67 | steppingAlgorithm(fUseSafety),
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| 68 | samplez(false),
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| 69 | latDisplasment(true)
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| 70 | {}
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| 71 |
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| 72 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 73 |
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| 74 | G4VMscModel::~G4VMscModel()
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| 75 | {}
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| 76 |
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| 77 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 78 |
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| 79 | void G4VMscModel::InitialiseSafetyHelper()
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| 80 | {
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| 81 | if(!safetyHelper) {
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| 82 | safetyHelper = G4TransportationManager::GetTransportationManager()
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| 83 | ->GetSafetyHelper();
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| 84 | safetyHelper->InitialiseHelper();
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| 85 | }
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| 86 | }
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| 87 |
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| 88 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 89 |
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| 90 | void G4VMscModel::ComputeDisplacement(G4ParticleChangeForMSC* fParticleChange,
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| 91 | const G4ThreeVector& dir,
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| 92 | G4double displacement,
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| 93 | G4double postsafety)
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| 94 | {
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| 95 | const G4ThreeVector* pos = fParticleChange->GetProposedPosition();
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| 96 | G4double r = displacement;
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| 97 | if(r > postsafety) {
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| 98 | G4double newsafety = safetyHelper->ComputeSafety(*pos);
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| 99 | if(r > newsafety) r = newsafety;
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| 100 | }
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| 101 | if(r > 0.) {
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| 102 |
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| 103 | // compute new endpoint of the Step
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| 104 | G4ThreeVector newPosition = *pos + r*dir;
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| 105 |
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| 106 | // definitely not on boundary
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| 107 | if(displacement == r) {
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| 108 | safetyHelper->ReLocateWithinVolume(newPosition);
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| 109 |
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| 110 | } else {
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| 111 | // check safety after displacement
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| 112 | G4double postsafety = safetyHelper->ComputeSafety(newPosition);
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| 113 |
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| 114 | // displacement to boundary
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| 115 | if(postsafety <= 0.0) {
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| 116 | safetyHelper->Locate(newPosition,
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| 117 | *fParticleChange->GetProposedMomentumDirection());
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| 118 |
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| 119 | // not on the boundary
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| 120 | } else {
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| 121 | safetyHelper->ReLocateWithinVolume(newPosition);
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| 122 | }
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| 123 | }
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| 124 | fParticleChange->ProposePosition(newPosition);
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 129 |
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| 130 | void G4VMscModel::SampleSecondaries(std::vector<G4DynamicParticle*>*,
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| 131 | const G4MaterialCutsCouple*,
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| 132 | const G4DynamicParticle*,
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| 133 | G4double, G4double)
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| 134 | {}
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| 135 |
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| 136 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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