[968] | 1 | // |
---|
| 2 | // ******************************************************************** |
---|
| 3 | // * License and Disclaimer * |
---|
| 4 | // * * |
---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
| 7 | // * conditions of the Geant4 Software License, included in the file * |
---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
| 9 | // * include a list of copyright holders. * |
---|
| 10 | // * * |
---|
| 11 | // * Neither the authors of this software system, nor their employing * |
---|
| 12 | // * institutes,nor the agencies providing financial support for this * |
---|
| 13 | // * work make any representation or warranty, express or implied, * |
---|
| 14 | // * regarding this software system or assume any liability for its * |
---|
| 15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
| 16 | // * for the full disclaimer and the limitation of liability. * |
---|
| 17 | // * * |
---|
| 18 | // * This code implementation is the result of the scientific and * |
---|
| 19 | // * technical work of the GEANT4 collaboration. * |
---|
| 20 | // * By using, copying, modifying or distributing the software (or * |
---|
| 21 | // * any work based on the software) you agree to acknowledge its * |
---|
| 22 | // * use in resulting scientific publications, and indicate your * |
---|
| 23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
| 24 | // ******************************************************************** |
---|
| 25 | // |
---|
[1340] | 26 | // $Id: G4VMscModel.cc,v 1.18 2010/09/07 16:05:33 vnivanch Exp $ |
---|
| 27 | // GEANT4 tag $Name: emutils-V09-03-23 $ |
---|
[968] | 28 | // |
---|
| 29 | // ------------------------------------------------------------------- |
---|
| 30 | // |
---|
| 31 | // GEANT4 Class file |
---|
| 32 | // |
---|
| 33 | // |
---|
| 34 | // File name: G4VMscModel |
---|
| 35 | // |
---|
| 36 | // Author: Vladimir Ivanchenko |
---|
| 37 | // |
---|
| 38 | // Creation date: 07.03.2008 |
---|
| 39 | // |
---|
| 40 | // Modifications: |
---|
| 41 | // |
---|
| 42 | // |
---|
| 43 | // Class Description: |
---|
| 44 | // |
---|
| 45 | // General interface to msc models |
---|
| 46 | |
---|
| 47 | // ------------------------------------------------------------------- |
---|
| 48 | // |
---|
| 49 | |
---|
| 50 | #include "G4VMscModel.hh" |
---|
[1055] | 51 | #include "G4ParticleChangeForMSC.hh" |
---|
| 52 | #include "G4TransportationManager.hh" |
---|
[968] | 53 | |
---|
| 54 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 55 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 56 | |
---|
| 57 | G4VMscModel::G4VMscModel(const G4String& nam): |
---|
| 58 | G4VEmModel(nam), |
---|
[1055] | 59 | safetyHelper(0), |
---|
| 60 | facrange(0.04), |
---|
[968] | 61 | facgeom(2.5), |
---|
[1196] | 62 | facsafety(0.3), |
---|
[1315] | 63 | skin(1.0), |
---|
[968] | 64 | dtrl(0.05), |
---|
| 65 | lambdalimit(mm), |
---|
[1340] | 66 | geomMin(1.e-6*CLHEP::mm), |
---|
| 67 | geomMax(1.e50*CLHEP::mm), |
---|
[968] | 68 | steppingAlgorithm(fUseSafety), |
---|
| 69 | samplez(false), |
---|
| 70 | latDisplasment(true) |
---|
| 71 | {} |
---|
| 72 | |
---|
| 73 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 74 | |
---|
| 75 | G4VMscModel::~G4VMscModel() |
---|
| 76 | {} |
---|
| 77 | |
---|
| 78 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
[1055] | 79 | |
---|
| 80 | G4ParticleChangeForMSC* G4VMscModel::GetParticleChangeForMSC() |
---|
| 81 | { |
---|
| 82 | G4ParticleChangeForMSC* p = 0; |
---|
| 83 | if (pParticleChange) { |
---|
| 84 | p = static_cast<G4ParticleChangeForMSC*>(pParticleChange); |
---|
| 85 | } else { |
---|
| 86 | p = new G4ParticleChangeForMSC(); |
---|
| 87 | } |
---|
| 88 | return p; |
---|
| 89 | } |
---|
| 90 | |
---|
| 91 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 92 | |
---|
| 93 | void G4VMscModel::InitialiseSafetyHelper() |
---|
| 94 | { |
---|
| 95 | if(!safetyHelper) { |
---|
| 96 | safetyHelper = G4TransportationManager::GetTransportationManager() |
---|
| 97 | ->GetSafetyHelper(); |
---|
| 98 | safetyHelper->InitialiseHelper(); |
---|
| 99 | } |
---|
| 100 | } |
---|
| 101 | |
---|
| 102 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 103 | |
---|
| 104 | void G4VMscModel::ComputeDisplacement(G4ParticleChangeForMSC* fParticleChange, |
---|
| 105 | const G4ThreeVector& dir, |
---|
| 106 | G4double displacement, |
---|
| 107 | G4double postsafety) |
---|
| 108 | { |
---|
[1340] | 109 | if(displacement <= geomMin) { return; } |
---|
[1055] | 110 | const G4ThreeVector* pos = fParticleChange->GetProposedPosition(); |
---|
| 111 | |
---|
[1340] | 112 | // displaced point is definitely within the volume |
---|
| 113 | if(displacement < postsafety) { |
---|
| 114 | |
---|
[1055] | 115 | // compute new endpoint of the Step |
---|
[1340] | 116 | G4ThreeVector newPosition = *pos + displacement*dir; |
---|
| 117 | safetyHelper->ReLocateWithinVolume(newPosition); |
---|
| 118 | fParticleChange->ProposePosition(newPosition); |
---|
| 119 | return; |
---|
| 120 | } |
---|
[1055] | 121 | |
---|
[1340] | 122 | // displaced point may be outside the volume |
---|
| 123 | G4double newsafety = safetyHelper->ComputeSafety(*pos); |
---|
[1055] | 124 | |
---|
[1340] | 125 | // add a factor which ensure numerical stability |
---|
| 126 | G4double r = std::min(displacement, newsafety*0.99); |
---|
[1055] | 127 | |
---|
[1340] | 128 | if(r > geomMin) { |
---|
[1055] | 129 | |
---|
[1340] | 130 | // compute new endpoint of the Step |
---|
| 131 | G4ThreeVector newPosition = *pos + r*dir; |
---|
| 132 | safetyHelper->ReLocateWithinVolume(newPosition); |
---|
[1055] | 133 | fParticleChange->ProposePosition(newPosition); |
---|
| 134 | } |
---|
| 135 | } |
---|
| 136 | |
---|
| 137 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 138 | |
---|
| 139 | void G4VMscModel::SampleScattering(const G4DynamicParticle*, G4double) |
---|
| 140 | {} |
---|
| 141 | |
---|
| 142 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 143 | |
---|
| 144 | G4double G4VMscModel::ComputeTruePathLengthLimit(const G4Track&, |
---|
| 145 | G4PhysicsTable*, |
---|
| 146 | G4double) |
---|
| 147 | { |
---|
| 148 | return DBL_MAX; |
---|
| 149 | } |
---|
| 150 | |
---|
| 151 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 152 | |
---|
| 153 | G4double G4VMscModel::ComputeGeomPathLength(G4double truePathLength) |
---|
| 154 | { |
---|
| 155 | return truePathLength; |
---|
| 156 | } |
---|
| 157 | |
---|
| 158 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 159 | |
---|
| 160 | G4double G4VMscModel::ComputeTrueStepLength(G4double geomPathLength) |
---|
| 161 | { |
---|
| 162 | return geomPathLength; |
---|
| 163 | } |
---|
| 164 | |
---|
| 165 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|
| 166 | |
---|
| 167 | void G4VMscModel::SampleSecondaries(std::vector<G4DynamicParticle*>*, |
---|
| 168 | const G4MaterialCutsCouple*, |
---|
| 169 | const G4DynamicParticle*, |
---|
| 170 | G4double, G4double) |
---|
| 171 | {} |
---|
| 172 | |
---|
| 173 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... |
---|