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25 //
26 // G4ParticleChangeForDecay class implementation
27 //
28 // Author: Hisaya Kurashige, 23 March 1998
29 // --------------------------------------------------------------------
30
31 #include "G4ParticleChangeForDecay.hh"
32 #include "G4SystemOfUnits.hh"
33 #include "G4Track.hh"
34 #include "G4Step.hh"
35 #include "G4DynamicParticle.hh"
36 #include "G4ExceptionSeverity.hh"
37
38 // --------------------------------------------------------------------
39 G4ParticleChangeForDecay::G4ParticleChangeForDecay()
40 {}
41
42 // --------------------------------------------------------------------
43 void G4ParticleChangeForDecay::Initialize(const G4Track& track)
44 {
45 // use base class's method at first
46 G4VParticleChange::Initialize(track);
47
48 // set TimeChange equal to local time of the parent track
49 theLocalTime0 = theTimeChange = track.GetLocalTime();
50
51 // set initial Local/Global time of the parent track
52 theGlobalTime0 = track.GetGlobalTime();
53
54 // set the Polarization equal to those of the parent track
55 thePolarizationChange = track.GetDynamicParticle()->GetPolarization();
56 }
57
58 // --------------------------------------------------------------------
59 G4Step* G4ParticleChangeForDecay::UpdateStepForPostStep(G4Step* pStep)
60 {
61 G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
62
63 if(isParentWeightProposed)
64 {
65 pPostStepPoint->SetWeight(theParentWeight);
66 }
67 // update polarization
68 pPostStepPoint->SetPolarization(thePolarizationChange);
69
70 // update the G4Step specific attributes
71 return UpdateStepInfo(pStep);
72 }
73
74 // --------------------------------------------------------------------
75 G4Step* G4ParticleChangeForDecay::UpdateStepForAtRest(G4Step* pStep)
76 {
77 // A physics process always calculates the final state of the particle
78
79 G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
80
81 // update polarization
82 pPostStepPoint->SetPolarization(thePolarizationChange);
83
84 // update time
85 pPostStepPoint->SetGlobalTime(GetGlobalTime());
86 pPostStepPoint->SetLocalTime(theTimeChange);
87 pPostStepPoint->AddProperTime(theTimeChange - theLocalTime0);
88
89 #ifdef G4VERBOSE
90 if(debugFlag) { CheckIt(*theCurrentTrack); }
91 #endif
92
93 if(isParentWeightProposed)
94 pPostStepPoint->SetWeight(theParentWeight);
95
96 // Update the G4Step specific attributes
97 return UpdateStepInfo(pStep);
98 }
99
100 // --------------------------------------------------------------------
101 void G4ParticleChangeForDecay::DumpInfo() const
102 {
103 // Show header
104 G4VParticleChange::DumpInfo();
105
106 G4long oldprc = G4cout.precision(8);
107 G4cout << " -----------------------------------------------" << G4endl;
108 G4cout << " G4ParticleChangeForDecay proposes: " << G4endl;
109 G4cout << " Proposed local Time (ns): " << std::setw(20)
110 << theTimeChange / ns << G4endl;
111 G4cout << " Initial local Time (ns) : " << std::setw(20)
112 << theLocalTime0 / ns << G4endl;
113 G4cout << " Initial global Time (ns): " << std::setw(20)
114 << theGlobalTime0 / ns << G4endl;
115 G4cout << " Current global Time (ns): " << std::setw(20)
116 << theCurrentTrack->GetGlobalTime() / ns << G4endl;
117 G4cout.precision(oldprc);
118 }
119
120 // --------------------------------------------------------------------
121 G4bool G4ParticleChangeForDecay::CheckIt(const G4Track& aTrack)
122 {
123 // local time should not go back
124 G4bool itsOK = true;
125 if(theTimeChange < theLocalTime0)
126 {
127 itsOK = false;
128 ++nError;
129 #ifdef G4VERBOSE
130 if(nError < maxError)
131 {
132 G4cout << " G4ParticleChangeForDecay::CheckIt : ";
133 G4cout << "the local time goes back !!"
134 << " Difference: " << (theTimeChange - theLocalTime0) / ns
135 << "[ns] " << G4endl;
136 G4cout << "initial local time " << theLocalTime0 / ns << "[ns] "
137 << "initial global time " << theGlobalTime0 / ns << "[ns] "
138 << G4endl;
139 }
140 #endif
141 theTimeChange = theLocalTime0;
142 }
143
144 if(!itsOK)
145 {
146 if(nError < maxError)
147 {
148 #ifdef G4VERBOSE
149 // dump out information of this particle change
150 DumpInfo();
151 #endif
152 G4Exception("G4ParticleChangeForDecay::CheckIt()", "TRACK005",
153 JustWarning, "time is illegal");
154 }
155 }
156
157 return (itsOK) && G4VParticleChange::CheckIt(aTrack);
158 }
159