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25 // 25 //
>> 26 // $Id: G4SafetyHelper.cc,v 1.15 2007/11/14 10:04:21 gcosmo Exp $
>> 27 // GEANT4 tag $ Name: $
>> 28 //
26 // class G4SafetyHelper Implementation 29 // class G4SafetyHelper Implementation
27 // 30 //
28 // Original author: John Apostolakis, 2006 31 // Original author: John Apostolakis, 2006
>> 32 //
29 // ------------------------------------------- 33 // --------------------------------------------------------------------
30 34
31 #include "G4SafetyHelper.hh" 35 #include "G4SafetyHelper.hh"
32 #include "G4PathFinder.hh" 36 #include "G4PathFinder.hh"
33 #include "G4TransportationManager.hh" 37 #include "G4TransportationManager.hh"
34 #include "G4Navigator.hh" 38 #include "G4Navigator.hh"
35 39
36 #include "globals.hh" 40 #include "globals.hh"
37 41
38 // ------------------------------------------- <<
39 G4SafetyHelper::G4SafetyHelper() 42 G4SafetyHelper::G4SafetyHelper()
40 : fLastSafetyPosition(0.0,0.0,0.0) << 43 : fUseParallelGeometries(false), // By default, one geometry only
>> 44 fFirstCall(true),
>> 45 fLastSafetyPosition(0.0,0.0,0.0),
>> 46 fLastSafety(0.0),
>> 47 fRecomputeFactor(0.0)
41 { 48 {
>> 49 fpPathFinder= 0; // Cannot initialise this yet - a loop results
>> 50
>> 51 // Initialization of the Navigator pointer is postponed, and must
>> 52 // be undertaken by another class calling InitialiseHelper()
>> 53 //
>> 54 fpMassNavigator= 0;
>> 55 fMassNavigatorId= -1;
42 } 56 }
43 57
44 // ------------------------------------------- <<
45 void G4SafetyHelper::InitialiseNavigator() 58 void G4SafetyHelper::InitialiseNavigator()
46 { 59 {
47 fpPathFinder = G4PathFinder::GetInstance(); << 60 fpPathFinder= G4PathFinder::GetInstance();
48 61
49 G4TransportationManager* pTransportMgr= 62 G4TransportationManager* pTransportMgr=
50 G4TransportationManager::GetTransportation 63 G4TransportationManager::GetTransportationManager();
51 64
52 fpMassNavigator = pTransportMgr->GetNavigato 65 fpMassNavigator = pTransportMgr->GetNavigatorForTracking();
53 66
54 // Check 67 // Check
55 // 68 //
56 G4VPhysicalVolume* worldPV = fpMassNavigator 69 G4VPhysicalVolume* worldPV = fpMassNavigator->GetWorldVolume();
57 if( worldPV == nullptr ) << 70 if( worldPV == 0 )
58 { 71 {
59 G4Exception("G4SafetyHelper::InitialiseNav 72 G4Exception("G4SafetyHelper::InitialiseNavigator",
60 "GeomNav0003", FatalException, << 73 "InvalidNavigatorWorld", FatalException,
61 "Found that existing tracking 74 "Found that existing tracking Navigator has NULL world");
62 } 75 }
>> 76
>> 77 fMassNavigatorId = pTransportMgr->ActivateNavigator( fpMassNavigator );
63 } 78 }
64 79
65 // ------------------------------------------- <<
66 void G4SafetyHelper::InitialiseHelper() 80 void G4SafetyHelper::InitialiseHelper()
67 { 81 {
68 fLastSafetyPosition = G4ThreeVector(0.0,0.0, 82 fLastSafetyPosition = G4ThreeVector(0.0,0.0,0.0);
69 fLastSafety = 0.0; 83 fLastSafety = 0.0;
70 if (fFirstCall) { InitialiseNavigator(); } 84 if (fFirstCall) { InitialiseNavigator(); }
71 fFirstCall = false; 85 fFirstCall = false;
72 } 86 }
73 87
74 G4SafetyHelper::~G4SafetyHelper() = default; << 88 G4SafetyHelper::~G4SafetyHelper()
>> 89 {
>> 90 }
75 91
76 G4double 92 G4double
77 G4SafetyHelper::CheckNextStep(const G4ThreeVec << 93 G4SafetyHelper::CheckNextStep(const G4ThreeVector &position,
78 const G4ThreeVec << 94 const G4ThreeVector &direction,
79 const G4double c 95 const G4double currentMaxStep,
80 G4double& 96 G4double& newSafety )
81 { 97 {
82 // Distance in the Mass geometry 98 // Distance in the Mass geometry
83 // 99 //
84 G4double linstep = fpMassNavigator->CheckNex 100 G4double linstep = fpMassNavigator->CheckNextStep( position,
85 101 direction,
86 102 currentMaxStep,
87 103 newSafety);
88 fLastSafetyPosition = position; 104 fLastSafetyPosition = position;
89 fLastSafety = newSafety; 105 fLastSafety = newSafety;
90 106
91 // TO-DO: Can replace this with a call to Pa 107 // TO-DO: Can replace this with a call to PathFinder
92 // giving id of Mass Geometry --> thi 108 // giving id of Mass Geometry --> this avoid doing the work twice
93 109
94 return linstep; 110 return linstep;
95 } 111 }
96 112
97 // ------------------------------------------- << 113 G4double G4SafetyHelper::ComputeSafety( const G4ThreeVector& position )
98 G4double G4SafetyHelper::ComputeSafety( const <<
99 <<
100 { 114 {
101 G4double newSafety; 115 G4double newSafety;
102 << 116
103 // Only recompute (calling Navigator/PathFin 117 // Only recompute (calling Navigator/PathFinder) if 'position'
104 // is *not* the safety location and has mov 118 // is *not* the safety location and has moved 'significantly'
105 // 119 //
106 G4double moveLengthSq = (position-fLastSafet 120 G4double moveLengthSq = (position-fLastSafetyPosition).mag2();
107 if( (moveLengthSq > 0.0 ) ) << 121 G4double safeDistance = fRecomputeFactor*fLastSafety;
>> 122 if( (moveLengthSq > 0.0 )
>> 123 && (moveLengthSq >= safeDistance*safeDistance))
108 { 124 {
>> 125 fLastSafetyPosition = position;
>> 126
109 if( !fUseParallelGeometries ) 127 if( !fUseParallelGeometries )
110 { 128 {
111 // Safety for mass geometry 129 // Safety for mass geometry
112 newSafety = fpMassNavigator->ComputeSafe << 130 fLastSafety = fpMassNavigator->ComputeSafety(position);
113 <<
114 // Only store a 'true' safety - one that <<
115 if( newSafety < maxLength ) <<
116 { <<
117 fLastSafety= newSafety; <<
118 fLastSafetyPosition = position; <<
119 } <<
120 } 131 }
121 else 132 else
122 { 133 {
123 // Safety for all geometries 134 // Safety for all geometries
124 newSafety = fpPathFinder->ComputeSafety( << 135 fLastSafety = fpPathFinder->ComputeSafety( position );
125 <<
126 fLastSafety= newSafety; <<
127 fLastSafetyPosition = position; <<
128 } 136 }
129 << 137 newSafety = fLastSafety;
130 } 138 }
131 else 139 else
132 { 140 {
133 // return last value if position is not (s << 141 // return last value if position is not significantly changed
134 // 142 //
135 // G4double moveLength = 0; << 143 G4double moveLength = 0;
136 // if( moveLengthSq > 0.0 ) { moveLength= << 144 if( moveLengthSq > 0.0 )
137 newSafety = fLastSafety; // -moveLength; << 145 {
138 } << 146 moveLength= std::sqrt(moveLengthSq);
139 << 147 }
>> 148 newSafety = fLastSafety-moveLength;
>> 149 }
140 return newSafety; 150 return newSafety;
141 } 151 }
142 152
143 // ------------------------------------------- << 153 void G4SafetyHelper::ReLocateWithinVolume( const G4ThreeVector &newPosition )
144 void G4SafetyHelper::ReLocateWithinVolume( con <<
145 { 154 {
146 #ifdef G4VERBOSE <<
147 if( fVerbose > 0 ) <<
148 { <<
149 // There is an opportunity - and need - to <<
150 // the proposed move is safe <<
151 G4ThreeVector moveVec = newPosition - fLas <<
152 if( moveVec.mag2() > sqr(fLastSafety) ) <<
153 { <<
154 // A problem exists - we are proposing t <<
155 G4ExceptionDescription ed; <<
156 ed << "Unsafe Move> Asked to relocate be <<
157 << G4endl; <<
158 ed << " Safety Sphere: Radius = " << fL <<
159 ed << " Center = " << fLastSafetyPosit <<
160 ed << " New Location : Move = " << mo <<
161 ed << " Position = " << newPosition << G <<
162 G4Exception("G4SafetyHelper::ReLocateWit <<
163 "GeomNav1001", JustWarning, <<
164 } <<
165 } <<
166 #endif <<
167 <<
168 if( !fUseParallelGeometries ) 155 if( !fUseParallelGeometries )
169 { 156 {
170 fpMassNavigator->LocateGlobalPointWithinVo 157 fpMassNavigator->LocateGlobalPointWithinVolume( newPosition );
171 } 158 }
172 else 159 else
173 { 160 {
174 fpPathFinder->ReLocate( newPosition ); 161 fpPathFinder->ReLocate( newPosition );
175 } 162 }
176 } 163 }
177 164
178 // ------------------------------------------- <<
179 void G4SafetyHelper::Locate( const G4ThreeVec 165 void G4SafetyHelper::Locate( const G4ThreeVector& newPosition,
180 const G4ThreeVec 166 const G4ThreeVector& newDirection)
181 { 167 {
182 if( !fUseParallelGeometries ) << 168 if( !fUseParallelGeometries)
183 { 169 {
184 fpMassNavigator->LocateGlobalPointAndSetup 170 fpMassNavigator->LocateGlobalPointAndSetup(newPosition, &newDirection,
185 171 true, false);
186 } 172 }
187 else 173 else
188 { 174 {
189 fpPathFinder->Locate( newPosition, newDire 175 fpPathFinder->Locate( newPosition, newDirection );
190 } 176 }
191 } 177 }
192 178