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25 //
26 // class G4ErrorPropagationNavigator implementation
27 //
28 // Author: Pedro Arce, CIEMAT
29 // --------------------------------------------------------------------
30
31 #include "G4ErrorPropagationNavigator.hh"
32
33 #include "globals.hh"
34 #include "G4ThreeVector.hh"
35 #include "G4ErrorPropagatorData.hh"
36 #include "G4ErrorSurfaceTarget.hh"
37
38 #include "G4ErrorPlaneSurfaceTarget.hh"
39 #include "G4ErrorCylSurfaceTarget.hh"
40
41 G4double G4ErrorPropagationNavigator::
42 ComputeStep ( const G4ThreeVector &pGlobalPoint,
43 const G4ThreeVector &pDirection,
44 const G4double pCurrentProposedStepLength,
45 G4double &pNewSafety )
46 {
47 G4double safetyGeom = DBL_MAX;
48
49 G4double Step = G4Navigator::ComputeStep(pGlobalPoint, pDirection,
50 pCurrentProposedStepLength,
51 safetyGeom);
52
53 G4ErrorPropagatorData* g4edata
54 = G4ErrorPropagatorData::GetErrorPropagatorData();
55
56 if ( g4edata != nullptr )
57 {
58 const G4ErrorTarget* target = g4edata->GetTarget();
59 if( target != nullptr )
60 {
61 G4double StepPlane=target->GetDistanceFromPoint(pGlobalPoint,pDirection);
62
63 if( StepPlane < 0. ) // Negative means target is crossed,
64 { // will not be found
65 StepPlane = DBL_MAX;
66 }
67 #ifdef G4VERBOSE
68 if( G4ErrorPropagatorData::verbose() >= 4 )
69 {
70 G4cout << "G4ErrorPropagationNavigator::ComputeStep()" << G4endl
71 << " Target step: " << StepPlane
72 << ", Transportation step: " << Step << G4endl;
73 target->Dump( "G4ErrorPropagationNavigator::ComputeStep Target " );
74 }
75 #endif
76
77 if( StepPlane < Step )
78 {
79 #ifdef G4VERBOSE
80 if( G4ErrorPropagatorData::verbose() >= 2 )
81 {
82 G4cout << "G4ErrorPropagationNavigator::ComputeStep()" << G4endl
83 << " TargetCloserThanBoundary: " << StepPlane << " < "
84 << Step << G4endl;
85 }
86 #endif
87 Step = StepPlane;
88 g4edata->SetState(G4ErrorState_TargetCloserThanBoundary);
89 }
90 else
91 {
92 g4edata->SetState(G4ErrorState_Propagating);
93 }
94 }
95 }
96 G4double safetyTarget = TargetSafetyFromPoint(pGlobalPoint);
97
98 // Avoid call to G4Navigator::ComputeSafety - which could have side effects
99 //
100 pNewSafety = std::min(safetyGeom, safetyTarget);
101
102 #ifdef G4VERBOSE
103 if( G4ErrorPropagatorData::verbose() >= 3 )
104 {
105 G4cout << "G4ErrorPropagationNavigator::ComputeStep()" << G4endl
106 << " Step: " << Step << ", ComputeSafety: " << pNewSafety
107 << G4endl;
108 }
109 #endif
110
111 return Step;
112 }
113
114 //-------------------------------------------------------------------
115
116 G4double G4ErrorPropagationNavigator::
117 TargetSafetyFromPoint( const G4ThreeVector& pGlobalpoint )
118 {
119 G4double safety = DBL_MAX;
120
121 G4ErrorPropagatorData* g4edata
122 = G4ErrorPropagatorData::GetErrorPropagatorData();
123
124 if ( g4edata != nullptr )
125 {
126 const G4ErrorTarget* target = g4edata->GetTarget();
127 if( target != nullptr )
128 {
129 safety = target->GetDistanceFromPoint(pGlobalpoint);
130 }
131 }
132 return safety;
133 }
134
135 //-------------------------------------------------------------------
136
137 G4double G4ErrorPropagationNavigator::
138 ComputeSafety( const G4ThreeVector &pGlobalPoint,
139 const G4double pMaxLength,
140 const G4bool keepState )
141 {
142 G4double safetyGeom = G4Navigator::ComputeSafety(pGlobalPoint,
143 pMaxLength, keepState);
144
145 G4double safetyTarget = TargetSafetyFromPoint( pGlobalPoint );
146
147 return std::min(safetyGeom, safetyTarget);
148 }
149
150 //-------------------------------------------------------------------
151
152 G4ThreeVector G4ErrorPropagationNavigator::
153 GetGlobalExitNormal( const G4ThreeVector& point, G4bool* valid )
154 {
155 G4ErrorPropagatorData* g4edata
156 = G4ErrorPropagatorData::GetErrorPropagatorData();
157 const G4ErrorTarget* target = nullptr;
158
159 G4ThreeVector normal(0.0, 0.0, 0.0);
160 G4double distance= 0;
161
162 // Determine which 'geometry' limited the step
163 if ( g4edata != nullptr )
164 {
165 target = g4edata->GetTarget();
166 if( target != nullptr )
167 {
168 distance = target->GetDistanceFromPoint(point);
169 }
170 }
171
172 if( distance > kCarTolerance || (target == nullptr) )
173 // Not reached the target or if a target does not exist,
174 // this seems the best we can do
175 {
176 normal = G4Navigator::GetGlobalExitNormal(point, valid);
177 }
178 else
179 {
180 switch( target->GetType() )
181 {
182 case G4ErrorTarget_GeomVolume:
183 // The volume is in the 'real' mass geometry
184 normal = G4Navigator::GetGlobalExitNormal(point, valid);
185 break;
186 case G4ErrorTarget_TrkL:
187 normal = G4ThreeVector( 0.0, 0.0, 0.0);
188 *valid = false;
189 G4Exception("G4ErrorPropagationNavigator::GetGlobalExitNormal",
190 "Geometry1003",
191 JustWarning, "Unexpected value of Target type");
192 break;
193 case G4ErrorTarget_PlaneSurface:
194 case G4ErrorTarget_CylindricalSurface:
195 const auto surfTarget= static_cast<const G4ErrorSurfaceTarget*>(target);
196 normal = surfTarget->GetTangentPlane(point).normal().unit();
197 *valid = true;
198 break;
199
200 // default:
201 // normal= G4ThreeVector( 0.0, 0.0, 0.0 );
202 // *valid = false;
203 // G4Exception("G4ErrorPropagationNavigator::GetGlobalExitNormal",
204 // "Geometry:003",
205 // FatalException, "Impossible value of Target type");
206 // break;
207 }
208 }
209 return normal;
210 }
211
212