Geant4  10.03.p02
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G4BOptnForceFreeFlight.cc
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27 #include "G4ILawForceFreeFlight.hh"
29 #include "G4Step.hh"
30 
31 
32 
34  : G4VBiasingOperation ( name ),
35  fCumulatedWeightChange ( -1.0 ),
36  fInitialTrackWeight ( -1.0 ),
37  fOperationComplete ( true )
38 {
39  fForceFreeFlightInteractionLaw = new G4ILawForceFreeFlight("LawForOperation"+name);
40 }
41 
43 {
44  if ( fForceFreeFlightInteractionLaw ) delete fForceFreeFlightInteractionLaw;
45 }
46 
48 {
49  fOperationComplete = false;
50  proposeForceCondition = Forced;
51  return fForceFreeFlightInteractionLaw;
52 }
53 
54 
56  const G4Track* track,
57  const G4Step* step,
58  G4bool& forceFinalState)
59 {
60  // -- If the track is reaching the volume boundary, its free flight ends. In this case, its zero
61  // -- weight is brought back to non-zero value: its initial weight is restored by the first
62  // -- ApplyFinalStateBiasing operation called, and the weight for force free flight is applied
63  // -- is applied by each operation.
64  // -- If the track is not reaching the volume boundary, it zero weight flight continues.
65 
66  fParticleChange.Initialize( *track );
67  forceFinalState = true;
68  if ( step->GetPostStepPoint()->GetStepStatus() == fGeomBoundary )
69  {
70  // -- Sanity checks:
71  if ( fInitialTrackWeight <= DBL_MIN )
72  {
74  ed << " Initial track weight is null ! " << G4endl;
75  G4Exception(" G4BOptnForceFreeFlight::ApplyFinalStateBiasing(...)",
76  "BIAS.GEN.05",
78  ed);
79  }
80  if ( fCumulatedWeightChange <= DBL_MIN )
81  {
83  ed << " Cumulated weight is null ! " << G4endl;
84  G4Exception(" G4BOptnForceFreeFlight::ApplyFinalStateBiasing(...)",
85  "BIAS.GEN.06",
87  ed);
88  }
89 
90  G4double proposedWeight = track->GetWeight();
91  if ( callingProcess->GetIsFirstPostStepDoItInterface() ) proposedWeight = fCumulatedWeightChange * fInitialTrackWeight;
92  else proposedWeight *= fCumulatedWeightChange;
93  fParticleChange.ProposeWeight(proposedWeight);
94  fOperationComplete = true;
95  }
96 
97  return &fParticleChange;
98 }
99 
100 
102 {
103  fCumulatedWeightChange *= weightChange;
104 }
const XML_Char * name
Definition: expat.h:151
virtual const G4VBiasingInteractionLaw * ProvideOccurenceBiasingInteractionLaw(const G4BiasingProcessInterface *, G4ForceCondition &)
virtual G4VParticleChange * ApplyFinalStateBiasing(const G4BiasingProcessInterface *, const G4Track *, const G4Step *, G4bool &)
std::ostringstream G4ExceptionDescription
Definition: globals.hh:76
G4StepStatus GetStepStatus() const
void ProposeWeight(G4double finalWeight)
bool G4bool
Definition: G4Types.hh:79
G4bool GetIsFirstPostStepDoItInterface(G4bool physOnly=true) const
Definition: G4Step.hh:76
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *comments)
Definition: G4Exception.cc:41
virtual void Initialize(const G4Track &)
G4StepPoint * GetPostStepPoint() const
#define DBL_MIN
Definition: templates.hh:75
G4double GetWeight() const
#define G4endl
Definition: G4ios.hh:61
virtual void AlongMoveBy(const G4BiasingProcessInterface *, const G4Step *, G4double)
double G4double
Definition: G4Types.hh:76
G4ForceCondition