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25 //
26 // G4ParticleChangeForLoss class implementation
27 //
28 // Author: Hisaya Kurashige, 23 March 1998
29 // Revision: Vladimir Ivantchenko, 16 January 2004
30 // --------------------------------------------------------------------
31
32 #include "G4ParticleChangeForLoss.hh"
33 #include "G4SystemOfUnits.hh"
34 #include "G4ExceptionSeverity.hh"
35
36 // --------------------------------------------------------------------
37 G4ParticleChangeForLoss::G4ParticleChangeForLoss()
38 {
39 // Disable flag that is enabled in G4VParticleChange if G4VERBOSE.
40 debugFlag = false;
41 SetNumberOfSecondaries(1);
42 }
43
44 // --------------------------------------------------------------------
45 void G4ParticleChangeForLoss::DumpInfo() const
46 {
47 // use base-class DumpInfo
48 G4VParticleChange::DumpInfo();
49
50 G4long oldprc = G4cout.precision(8);
51 G4cout << " -----------------------------------------------" << G4endl;
52 G4cout << " G4ParticleChangeForLoss proposes: " << G4endl;
53 G4cout << " Charge (eplus) : " << std::setw(20)
54 << currentCharge / eplus << G4endl;
55 G4cout << " Kinetic Energy (MeV): " << std::setw(20)
56 << proposedKinEnergy / MeV << G4endl;
57 G4cout << " Momentum Direct - x : " << std::setw(20)
58 << proposedMomentumDirection.x() << G4endl;
59 G4cout << " Momentum Direct - y : " << std::setw(20)
60 << proposedMomentumDirection.y() << G4endl;
61 G4cout << " Momentum Direct - z : " << std::setw(20)
62 << proposedMomentumDirection.z() << G4endl;
63 G4cout.precision(oldprc);
64 }
65
66 // --------------------------------------------------------------------
67 G4Step* G4ParticleChangeForLoss::UpdateStepForAlongStep(G4Step* pStep)
68 {
69 const G4StepPoint* pPreStepPoint = pStep->GetPreStepPoint();
70 G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
71
72 // accumulate change of the kinetic energy
73 G4double preKinEnergy = pPreStepPoint->GetKineticEnergy();
74 G4double kinEnergy =
75 pPostStepPoint->GetKineticEnergy() + (proposedKinEnergy - preKinEnergy);
76
77 pPostStepPoint->SetCharge(currentCharge);
78
79 // calculate velocity
80 if(kinEnergy > 0.0)
81 {
82 pPostStepPoint->SetKineticEnergy(kinEnergy);
83
84 // assuming that mass>0, zero mass particles do not have energy loss
85 pPostStepPoint->SetVelocity(CLHEP::c_light*ComputeBeta(kinEnergy));
86 }
87 else
88 {
89 pPostStepPoint->SetKineticEnergy(0.0);
90 pPostStepPoint->SetVelocity(0.0);
91 }
92
93 if(isParentWeightProposed)
94 {
95 pPostStepPoint->SetWeight(theParentWeight);
96 }
97
98 pStep->AddTotalEnergyDeposit(theLocalEnergyDeposit);
99 pStep->AddNonIonizingEnergyDeposit(theNonIonizingEnergyDeposit);
100 return pStep;
101 }
102
103 // --------------------------------------------------------------------
104 G4Step* G4ParticleChangeForLoss::UpdateStepForPostStep(G4Step* pStep)
105 {
106 G4StepPoint* pPostStepPoint = pStep->GetPostStepPoint();
107
108 pPostStepPoint->SetCharge(currentCharge);
109 pPostStepPoint->SetMomentumDirection(proposedMomentumDirection);
110 if(proposedKinEnergy > 0.0)
111 {
112 pPostStepPoint->SetKineticEnergy(proposedKinEnergy);
113
114 // assuming that mass>0, zero mass particles do not have energy loss
115 pPostStepPoint->SetVelocity(CLHEP::c_light*ComputeBeta(proposedKinEnergy));
116 }
117 else
118 {
119 pPostStepPoint->SetKineticEnergy(0.0);
120 pPostStepPoint->SetVelocity(0.0);
121 }
122 pPostStepPoint->SetPolarization(proposedPolarization);
123
124 if(isParentWeightProposed)
125 {
126 pPostStepPoint->SetWeight(theParentWeight);
127 }
128
129 pStep->AddTotalEnergyDeposit(theLocalEnergyDeposit);
130 pStep->AddNonIonizingEnergyDeposit(theNonIonizingEnergyDeposit);
131 return pStep;
132 }
133