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G4VMscModel.cc
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25 //
26 // $Id: G4VMscModel.cc 66590 2012-12-23 09:31:50Z vnivanch $
27 //
28 // -------------------------------------------------------------------
29 //
30 // GEANT4 Class file
31 //
32 //
33 // File name: G4VMscModel
34 //
35 // Author: Vladimir Ivanchenko
36 //
37 // Creation date: 07.03.2008
38 //
39 // Modifications:
40 //
41 //
42 // Class Description:
43 //
44 // General interface to msc models
45 
46 // -------------------------------------------------------------------
47 //
48 
49 #include "G4VMscModel.hh"
50 #include "G4SystemOfUnits.hh"
51 #include "G4ParticleChangeForMSC.hh"
52 #include "G4TransportationManager.hh"
53 #include "G4LossTableBuilder.hh"
54 
55 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
56 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
57 
58 G4VMscModel::G4VMscModel(const G4String& nam):
59  G4VEmModel(nam),
60  safetyHelper(0),
61  ionisation(0),
62  facrange(0.04),
63  facgeom(2.5),
64  facsafety(0.3),
65  skin(1.0),
66  dtrl(0.05),
67  lambdalimit(mm),
68  geomMin(1.e-6*CLHEP::mm),
69  geomMax(1.e50*CLHEP::mm),
70  steppingAlgorithm(fUseSafety),
71  samplez(false),
72  latDisplasment(true)
73 {
74  dedx = 2.0*CLHEP::MeV*CLHEP::cm2/CLHEP::g;
75  localrange = DBL_MAX;
76  localtkin = 0.0;
77  man = G4LossTableManager::Instance();
78  currentPart = 0;
79 }
80 
81 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
82 
83 G4VMscModel::~G4VMscModel()
84 {}
85 
86 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
87 
88 G4ParticleChangeForMSC*
89 G4VMscModel::GetParticleChangeForMSC(const G4ParticleDefinition* p)
90 {
91  if(!safetyHelper) {
92  safetyHelper = G4TransportationManager::GetTransportationManager()
93  ->GetSafetyHelper();
94  safetyHelper->InitialiseHelper();
95  }
96  G4ParticleChangeForMSC* change = 0;
97  if (pParticleChange) {
98  change = static_cast<G4ParticleChangeForMSC*>(pParticleChange);
99  } else {
100  change = new G4ParticleChangeForMSC();
101  }
102  if(p) {
103 
104  // table is never built for GenericIon
105  if(p->GetParticleName() == "GenericIon") {
106  if(xSectionTable) {
107  xSectionTable->clearAndDestroy();
108  delete xSectionTable;
109  xSectionTable = 0;
110  }
111 
112  // table is always built for low mass particles
113  } else if(p->GetPDGMass() < 4.5*GeV || ForceBuildTableFlag()) {
114  G4double emin = std::max(LowEnergyLimit(), LowEnergyActivationLimit());
115  G4double emax = std::min(HighEnergyLimit(), HighEnergyActivationLimit());
116  emin = std::max(emin, man->MinKinEnergy());
117  emax = std::min(emax, man->MaxKinEnergy());
118  G4LossTableBuilder* builder = man->GetTableBuilder();
119  xSectionTable = builder->BuildTableForModel(xSectionTable, this, p,
120  emin, emax, true);
121  theDensityFactor = builder->GetDensityFactors();
122  theDensityIdx = builder->GetCoupleIndexes();
123  }
124  }
125  return change;
126 }
127 
128 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
129 
130 G4ThreeVector&
131 G4VMscModel::SampleScattering(const G4ThreeVector&, G4double)
132 {
133  return fDisplacement;
134 }
135 
136 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
137 
138 G4double G4VMscModel::ComputeTruePathLengthLimit(const G4Track&, G4double&)
139 {
140  return DBL_MAX;
141 }
142 
143 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
144 
145 G4double G4VMscModel::ComputeGeomPathLength(G4double truePathLength)
146 {
147  return truePathLength;
148 }
149 
150 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
151 
152 G4double G4VMscModel::ComputeTrueStepLength(G4double geomPathLength)
153 {
154  return geomPathLength;
155 }
156 
157 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
158 
159 void G4VMscModel::SampleSecondaries(std::vector<G4DynamicParticle*>*,
160  const G4MaterialCutsCouple*,
161  const G4DynamicParticle*,
162  G4double, G4double)
163 {}
164 
165 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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