microbeam/src/StepMax.cc

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0025 //
0026 //
0027 //
0028 // This example is provided by the Geant4-DNA collaboration
0029 // Any report or published results obtained using the Geant4-DNA software
0030 // shall cite the following Geant4-DNA collaboration publication:
0031 // Med. Phys. 37 (2010) 4692-4708
0032 // The Geant4-DNA web site is available at http://geant4-dna.org
0033 //
0034 // If you use this example, please cite the following publication:
0035 // Rad. Prot. Dos. 133 (2009) 2-11
0036 //
0037 #include "StepMax.hh"
0038 #include "PhysicsListMessenger.hh"
0039 #include "G4VPhysicalVolume.hh"
0040 #include "G4TransportationProcessType.hh"
0041
0042 StepMax::StepMax(PhysicsListMessenger* mess)
0043   : G4VEmProcess("UserMaxStep", fGeneral),fMessenger(mess),
0044     fMaxChargedStep(DBL_MAX),isInitialised(false)
0045 {
0046   SetProcessSubType(static_cast<G4int>(STEP_LIMITER));
0047 }
0048
0049 StepMax::~StepMax()
0050 {}
0051
0052 G4bool StepMax::IsApplicable(const G4ParticleDefinition& part)
0053 {
0054   return (part.GetPDGCharge() != 0. && !part.IsShortLived());
0055 }
0056
0057 void StepMax::PreparePhysicsTable(const G4ParticleDefinition&)
0058 {
0059   if(isInitialised) {
0060     isInitialised = false;
0061   }
0062 }
0063
0064 void StepMax::BuildPhysicsTable(const G4ParticleDefinition&)
0065 {
0066   if(!isInitialised) {
0067     fMaxChargedStep = fMessenger->GetMaxChargedStep();
0068     isInitialised = true;
0069     if(fMaxChargedStep < DBL_MAX) {
0070       G4cout << GetProcessName() << ":  SubType= " << GetProcessSubType()
0071              << "  Step limit(mm)= " << fMaxChargedStep << G4endl;
0072     }
0073   }
0074 }
0075
0076 void StepMax::InitialiseProcess(const G4ParticleDefinition*)
0077 {}
0078
0079 G4double
0080 StepMax::PostStepGetPhysicalInteractionLength(const G4Track&,
0081                                               G4double,
0082                                               G4ForceCondition* condition)
0083 {
0084   // condition is set to "Not Forced"
0085   *condition = NotForced;
0086   return fMaxChargedStep;
0087 }
0088
0089 G4VParticleChange* StepMax::PostStepDoIt(const G4Track& aTrack, const G4Step&)
0090 {
0091   // do nothing
0092   aParticleChange.Initialize(aTrack);
0093   return &aParticleChange;
0094 }
0095
0096