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25 // 25 //
>> 26 // $Id: G4SafetyHelper.cc,v 1.12 2007/05/09 12:57:31 japost 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 // ------------------------------------------- << 42 G4SafetyHelper::G4SafetyHelper() :
39 G4SafetyHelper::G4SafetyHelper() << 43 fUseParallelGeometries(false), // By default, one geometry only
40 : fLastSafetyPosition(0.0,0.0,0.0) << 44 fFirstCall(true),
41 { << 45 fLastSafetyPosition(0.0,0.0,0.0),
>> 46 fLastSafety(0.0),
>> 47 fRecomputeFactor(0.2)
>> 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 fpMassNavigator= 0;
>> 54 fMassNavigatorId= -1;
42 } 55 }
43 56
44 // ------------------------------------------- <<
45 void G4SafetyHelper::InitialiseNavigator() 57 void G4SafetyHelper::InitialiseNavigator()
46 { 58 {
47 fpPathFinder = G4PathFinder::GetInstance(); << 59 fpPathFinder= G4PathFinder::GetInstance();
48 60
49 G4TransportationManager* pTransportMgr= 61 G4TransportationManager* pTransportMgr=
50 G4TransportationManager::GetTransportation 62 G4TransportationManager::GetTransportationManager();
51 63
52 fpMassNavigator = pTransportMgr->GetNavigato 64 fpMassNavigator = pTransportMgr->GetNavigatorForTracking();
53 65
54 // Check 66 // Check
55 // <<
56 G4VPhysicalVolume* worldPV = fpMassNavigator 67 G4VPhysicalVolume* worldPV = fpMassNavigator->GetWorldVolume();
57 if( worldPV == nullptr ) << 68 if( worldPV == 0 )
58 { 69 {
59 G4Exception("G4SafetyHelper::InitialiseNav 70 G4Exception("G4SafetyHelper::InitialiseNavigator",
60 "GeomNav0003", FatalException, << 71 "InvalidNavigatorWorld", FatalException,
61 "Found that existing tracking 72 "Found that existing tracking Navigator has NULL world");
62 } 73 }
>> 74
>> 75 fMassNavigatorId = pTransportMgr->ActivateNavigator( fpMassNavigator );
63 } 76 }
64 77
65 // ------------------------------------------- <<
66 void G4SafetyHelper::InitialiseHelper() 78 void G4SafetyHelper::InitialiseHelper()
67 { 79 {
68 fLastSafetyPosition = G4ThreeVector(0.0,0.0, 80 fLastSafetyPosition = G4ThreeVector(0.0,0.0,0.0);
69 fLastSafety = 0.0; 81 fLastSafety = 0.0;
70 if (fFirstCall) { InitialiseNavigator(); } 82 if (fFirstCall) { InitialiseNavigator(); }
71 fFirstCall = false; 83 fFirstCall = false;
72 } 84 }
73 85
74 G4SafetyHelper::~G4SafetyHelper() = default; << 86 G4SafetyHelper::~G4SafetyHelper()
>> 87 {}
75 88
76 G4double 89 G4double
77 G4SafetyHelper::CheckNextStep(const G4ThreeVec << 90 G4SafetyHelper::CheckNextStep(const G4ThreeVector &position,
78 const G4ThreeVec << 91 const G4ThreeVector &direction,
79 const G4double c 92 const G4double currentMaxStep,
80 G4double& 93 G4double& newSafety )
81 { 94 {
82 // Distance in the Mass geometry 95 // Distance in the Mass geometry
83 // 96 //
84 G4double linstep = fpMassNavigator->CheckNex 97 G4double linstep = fpMassNavigator->CheckNextStep( position,
85 98 direction,
86 99 currentMaxStep,
87 100 newSafety);
88 fLastSafetyPosition = position; 101 fLastSafetyPosition = position;
89 fLastSafety = newSafety; 102 fLastSafety = newSafety;
90 103
91 // TO-DO: Can replace this with a call to Pa 104 // TO-DO: Can replace this with a call to PathFinder
92 // giving id of Mass Geometry --> thi 105 // giving id of Mass Geometry --> this avoid doing the work twice
93 <<
94 return linstep; 106 return linstep;
95 } 107 }
96 108
97 // ------------------------------------------- << 109 G4double G4SafetyHelper::ComputeSafety( const G4ThreeVector& position )
98 G4double G4SafetyHelper::ComputeSafety( const <<
99 <<
100 { 110 {
101 G4double newSafety; 111 G4double newSafety;
102 << 112
103 // Only recompute (calling Navigator/PathFin << 113 // return last value if position is not significantly changed
104 // is *not* the safety location and has mov <<
105 // 114 //
106 G4double moveLengthSq = (position-fLastSafet << 115 G4double moveLen = (position-fLastSafetyPosition).mag();
107 if( (moveLengthSq > 0.0 ) ) << 116 if(moveLen >= fRecomputeFactor*fLastSafety)
108 { 117 {
>> 118 fLastSafetyPosition = position;
>> 119
109 if( !fUseParallelGeometries ) 120 if( !fUseParallelGeometries )
110 { 121 {
111 // Safety for mass geometry 122 // Safety for mass geometry
112 newSafety = fpMassNavigator->ComputeSafe << 123 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 } 124 }
121 else 125 else
122 { 126 {
123 // Safety for all geometries 127 // Safety for all geometries
124 newSafety = fpPathFinder->ComputeSafety( << 128 fLastSafety = fpPathFinder->ComputeSafety( position );
125 <<
126 fLastSafety= newSafety; <<
127 fLastSafetyPosition = position; <<
128 } 129 }
129 << 130 newSafety = fLastSafety;
130 } 131 }
131 else 132 else
132 { 133 {
133 // return last value if position is not (s << 134 newSafety = fLastSafety-moveLen;
134 // << 135 }
135 // G4double moveLength = 0; <<
136 // if( moveLengthSq > 0.0 ) { moveLength= <<
137 newSafety = fLastSafety; // -moveLength; <<
138 } <<
139 <<
140 return newSafety; 136 return newSafety;
141 } 137 }
142 138
143 // ------------------------------------------- << 139 void G4SafetyHelper::ReLocateWithinVolume( const G4ThreeVector &newPosition )
144 void G4SafetyHelper::ReLocateWithinVolume( con <<
145 { 140 {
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 ) 141 if( !fUseParallelGeometries )
169 { 142 {
170 fpMassNavigator->LocateGlobalPointWithinVo 143 fpMassNavigator->LocateGlobalPointWithinVolume( newPosition );
171 } 144 }
172 else 145 else
173 { 146 {
174 fpPathFinder->ReLocate( newPosition ); 147 fpPathFinder->ReLocate( newPosition );
175 } 148 }
176 } 149 }
177 150
178 // ------------------------------------------- <<
179 void G4SafetyHelper::Locate( const G4ThreeVec 151 void G4SafetyHelper::Locate( const G4ThreeVector& newPosition,
180 const G4ThreeVec 152 const G4ThreeVector& newDirection)
181 { 153 {
182 if( !fUseParallelGeometries ) << 154 if( !fUseParallelGeometries)
183 { 155 {
184 fpMassNavigator->LocateGlobalPointAndSetup 156 fpMassNavigator->LocateGlobalPointAndSetup(newPosition, &newDirection,
185 157 true, false);
186 } 158 }
187 else 159 else
188 { 160 {
189 fpPathFinder->Locate( newPosition, newDire 161 fpPathFinder->Locate( newPosition, newDirection );
190 } 162 }
191 } 163 }
192 164