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26 // 26 //
>> 27 // $Id: G4Transportation.cc,v 1.72.2.3 2008/11/21 18:35:15 japost Exp $
>> 28 // GEANT4 tag $Name: geant4-09-02 $
27 // 29 //
28 // ------------------------------------------- 30 // ------------------------------------------------------------
29 // GEANT 4 include file implementation 31 // GEANT 4 include file implementation
30 // 32 //
31 // ------------------------------------------- 33 // ------------------------------------------------------------
32 // 34 //
33 // This class is a process responsible for the 35 // This class is a process responsible for the transportation of
34 // a particle, ie the geometrical propagation 36 // a particle, ie the geometrical propagation that encounters the
35 // geometrical sub-volumes of the detectors. 37 // geometrical sub-volumes of the detectors.
36 // 38 //
37 // It is also tasked with the key role of prop 39 // It is also tasked with the key role of proposing the "isotropic safety",
38 // which will be used to update the post-ste 40 // which will be used to update the post-step point's safety.
39 // 41 //
40 // =========================================== 42 // =======================================================================
>> 43 // Modified:
>> 44 // 20 Nov 2008, J.Apostolakis: Push safety to helper - after ComputeSafety
>> 45 // 9 Nov 2007, J.Apostolakis: Flag for short steps, push safety to helper
>> 46 // 19 Jan 2006, P.MoraDeFreitas: Fix for suspended tracks (StartTracking)
>> 47 // 11 Aug 2004, M.Asai: Add G4VSensitiveDetector* for updating stepPoint.
>> 48 // 21 June 2003, J.Apostolakis: Calling field manager with
>> 49 // track, to enable it to configure its accuracy
>> 50 // 13 May 2003, J.Apostolakis: Zero field areas now taken into
>> 51 // account correclty in all cases (thanks to W Pokorski).
>> 52 // 29 June 2001, J.Apostolakis, D.Cote-Ahern, P.Gumplinger:
>> 53 // correction for spin tracking
>> 54 // 20 Febr 2001, J.Apostolakis: update for new FieldTrack
>> 55 // 22 Sept 2000, V.Grichine: update of Kinetic Energy
41 // Created: 19 March 1997, J. Apostolakis 56 // Created: 19 March 1997, J. Apostolakis
42 // =========================================== 57 // =======================================================================
43 58
44 #include "G4Transportation.hh" 59 #include "G4Transportation.hh"
45 #include "G4TransportationProcessType.hh" <<
46 #include "G4TransportationLogger.hh" <<
47 <<
48 #include "G4PhysicalConstants.hh" <<
49 #include "G4SystemOfUnits.hh" <<
50 #include "G4ProductionCutsTable.hh" 60 #include "G4ProductionCutsTable.hh"
51 #include "G4ParticleTable.hh" 61 #include "G4ParticleTable.hh"
52 << 62 #include "G4ChordFinder.hh"
53 #include "G4ChargeState.hh" << 63 #include "G4SafetyHelper.hh"
54 #include "G4EquationOfMotion.hh" <<
55 <<
56 #include "G4FieldManagerStore.hh" 64 #include "G4FieldManagerStore.hh"
57 <<
58 #include "G4Navigator.hh" <<
59 #include "G4PropagatorInField.hh" <<
60 #include "G4TransportationManager.hh" <<
61 <<
62 #include "G4TransportationParameters.hh" <<
63 <<
64 class G4VSensitiveDetector; 65 class G4VSensitiveDetector;
65 66
66 G4bool G4Transportation::fUseMagneticMoment=fa <<
67 G4bool G4Transportation::fUseGravity= false; <<
68 G4bool G4Transportation::fSilenceLooperWarning <<
69 <<
70 ////////////////////////////////////////////// 67 //////////////////////////////////////////////////////////////////////////
71 // 68 //
72 // Constructor 69 // Constructor
73 70
74 G4Transportation::G4Transportation( G4int verb << 71 G4Transportation::G4Transportation( G4int verboseLevel )
75 : G4VProcess( aName, fTransportation ), << 72 : G4VProcess( G4String("Transportation"), fTransportation ),
76 fFieldExertedForce( false ), << 73 fParticleIsLooping( false ),
77 fPreviousSftOrigin( 0.,0.,0. ), << 74 fPreviousSftOrigin (0.,0.,0.),
78 fPreviousSafety( 0.0 ), << 75 fPreviousSafety ( 0.0 ),
79 fEndPointDistance( -1.0 ), << 76 fThreshold_Warning_Energy( 100 * MeV ),
80 fShortStepOptimisation( false ) // Old def << 77 fThreshold_Important_Energy( 250 * MeV ),
>> 78 fThresholdTrials( 10 ),
>> 79 fUnimportant_Energy( 1 * MeV ),
>> 80 fNoLooperTrials(0),
>> 81 fSumEnergyKilled( 0.0 ), fMaxEnergyKilled( 0.0 ),
>> 82 fShortStepOptimisation(false), // Old default: true (=fast short steps)
>> 83 fVerboseLevel( verboseLevel )
81 { 84 {
82 SetProcessSubType(static_cast<G4int>(TRANSPO <<
83 pParticleChange= &fParticleChange; // Requ <<
84 SetVerboseLevel(verbosity); <<
85 <<
86 G4TransportationManager* transportMgr ; 85 G4TransportationManager* transportMgr ;
87 86
88 transportMgr = G4TransportationManager::GetT 87 transportMgr = G4TransportationManager::GetTransportationManager() ;
89 88
90 fLinearNavigator = transportMgr->GetNavigato 89 fLinearNavigator = transportMgr->GetNavigatorForTracking() ;
91 90
>> 91 // fGlobalFieldMgr = transportMgr->GetFieldManager() ;
>> 92
92 fFieldPropagator = transportMgr->GetPropagat 93 fFieldPropagator = transportMgr->GetPropagatorInField() ;
93 94
94 fpSafetyHelper = transportMgr->GetSafetyHe 95 fpSafetyHelper = transportMgr->GetSafetyHelper(); // New
95 96
96 fpLogger = new G4TransportationLogger("G4Tra << 97 // Cannot determine whether a field exists here,
>> 98 // because it would only work if the field manager has informed
>> 99 // about the detector's field before this transportation process
>> 100 // is constructed.
>> 101 // Instead later the method DoesGlobalFieldExist() is called
97 102
98 if( G4TransportationParameters::Exists() ) << 103 static G4TouchableHandle nullTouchableHandle; // Points to (G4VTouchable*) 0
99 { << 104 fCurrentTouchableHandle = nullTouchableHandle;
100 auto trParams= G4TransportationParameters: <<
101 <<
102 SetThresholdWarningEnergy( trParams->GetW <<
103 SetThresholdImportantEnergy( trParams->Get <<
104 SetThresholdTrials( trParams->GetNumberOfT <<
105 G4Transportation::fSilenceLooperWarnings= <<
106 } <<
107 else { <<
108 SetHighLooperThresholds(); <<
109 // Use the old defaults: Warning = 100 Me <<
110 } <<
111 <<
112 PushThresholdsToLogger(); <<
113 // Should be done by Set methods in SetHighL <<
114 <<
115 static G4ThreadLocal G4TouchableHandle* pNul <<
116 if ( !pNullTouchableHandle) <<
117 { <<
118 pNullTouchableHandle = new G4TouchableHand <<
119 } <<
120 fCurrentTouchableHandle = *pNullTouchableHan <<
121 // Points to (G4VTouchable*) 0 <<
122 105
123 << 106 fEndGlobalTimeComputed = false;
124 #ifdef G4VERBOSE << 107 fCandidateEndGlobalTime = 0;
125 if( verboseLevel > 0) <<
126 { <<
127 G4cout << " G4Transportation constructor> <<
128 if ( fShortStepOptimisation ) { G4cout < <<
129 else { G4cout < <<
130 } <<
131 #endif <<
132 } 108 }
133 109
134 ////////////////////////////////////////////// 110 //////////////////////////////////////////////////////////////////////////
135 111
136 G4Transportation::~G4Transportation() 112 G4Transportation::~G4Transportation()
137 { 113 {
138 if( fSumEnergyKilled > 0.0 ) << 114 if( (fVerboseLevel > 0) && (fSumEnergyKilled > 0.0 ) ){
139 { << 115 G4cout << " G4Transportation: Statistics for looping particles " << G4endl;
140 PrintStatistics( G4cout ); << 116 G4cout << " Sum of energy of loopers killed: " << fSumEnergyKilled << G4endl;
141 } << 117 G4cout << " Max energy of loopers killed: " << fMaxEnergyKilled << G4endl;
142 delete fpLogger; << 118 }
143 } <<
144 <<
145 ////////////////////////////////////////////// <<
146 <<
147 void <<
148 G4Transportation::PrintStatistics( std::ostrea <<
149 { <<
150 outStr << " G4Transportation: Statistics fo <<
151 if( fSumEnergyKilled > 0.0 || fNumLoopersKi <<
152 { <<
153 outStr << " Sum of energy of looping t <<
154 << fSumEnergyKilled / CLHEP::MeV <<
155 << " from " << fNumLoopersKilled <<
156 << " Sum of energy of non-elect <<
157 << fSumEnergyKilled_NonElectron / <<
158 << " from " << fNumLoopersKilled <<
159 << G4endl; <<
160 outStr << " Max energy of *any type* <<
161 << " its PDG was " << fMaxEner <<
162 if( fMaxEnergyKilled_NonElectron > 0.0 ) <<
163 { <<
164 outStr << " Max energy of non-elect <<
165 << fMaxEnergyKilled_NonElectro <<
166 << " its PDG was " << fMaxE <<
167 } <<
168 if( fMaxEnergySaved > 0.0 ) <<
169 { <<
170 outStr << " Max energy of loopers ' <<
171 outStr << " Sum of energy of looper <<
172 << fSumEnergySaved << G4endl; <<
173 outStr << " Sum of energy of unstab <<
174 << fSumEnergyUnstableSaved << <<
175 } <<
176 } <<
177 else <<
178 { <<
179 outStr << " No looping tracks found or k <<
180 } <<
181 } 119 }
182 120
183 ////////////////////////////////////////////// 121 //////////////////////////////////////////////////////////////////////////
184 // 122 //
185 // Responsibilities: 123 // Responsibilities:
186 // Find whether the geometry limits the Ste 124 // Find whether the geometry limits the Step, and to what length
187 // Calculate the new value of the safety an 125 // Calculate the new value of the safety and return it.
188 // Store the final time, position and momen 126 // Store the final time, position and momentum.
189 127
190 G4double G4Transportation::AlongStepGetPhysica << 128 G4double G4Transportation::
191 const G4Track& track, << 129 AlongStepGetPhysicalInteractionLength( const G4Track& track,
192 G4double, // previousStepSize << 130 G4double, // previousStepSize
193 G4double currentMinimumStep, G4double& curre << 131 G4double currentMinimumStep,
194 G4GPILSelection* selection) << 132 G4double& currentSafety,
>> 133 G4GPILSelection* selection )
195 { 134 {
196 // Initial actions moved to StartTrack() << 135 G4double geometryStepLength, newSafety ;
>> 136 fParticleIsLooping = false ;
>> 137
>> 138 // Initial actions moved to StartTrack()
197 // -------------------------------------- 139 // --------------------------------------
198 // Note: in case another process changes tou 140 // Note: in case another process changes touchable handle
199 // it will be necessary to add here (for << 141 // it will be necessary to add here (for all steps)
200 // fCurrentTouchableHandle = aTrack->GetTouc 142 // fCurrentTouchableHandle = aTrack->GetTouchableHandle();
201 143
202 // GPILSelection is set to defaule value of 144 // GPILSelection is set to defaule value of CandidateForSelection
203 // It is a return value 145 // It is a return value
204 // 146 //
205 *selection = CandidateForSelection; << 147 *selection = CandidateForSelection ;
206 148
207 // Get initial Energy/Momentum of the track 149 // Get initial Energy/Momentum of the track
208 // 150 //
209 const G4ThreeVector startPosition = track << 151 const G4DynamicParticle* pParticle = track.GetDynamicParticle() ;
210 const G4ThreeVector startMomentumDir = track << 152 const G4ParticleDefinition* pParticleDef = pParticle->GetDefinition() ;
>> 153 G4ThreeVector startMomentumDir = pParticle->GetMomentumDirection() ;
>> 154 G4ThreeVector startPosition = track.GetPosition() ;
>> 155
>> 156 // G4double theTime = track.GetGlobalTime() ;
211 157
212 // The Step Point safety can be limited by o << 158 // The Step Point safety can be limited by other geometries and/or the
213 // assumptions of any process - it's not alw 159 // assumptions of any process - it's not always the geometrical safety.
214 // We calculate the starting point's isotrop 160 // We calculate the starting point's isotropic safety here.
>> 161 //
>> 162 G4ThreeVector OriginShift = startPosition - fPreviousSftOrigin ;
>> 163 G4double MagSqShift = OriginShift.mag2() ;
>> 164 if( MagSqShift >= sqr(fPreviousSafety) )
215 { 165 {
216 const G4double MagSqShift = (startPosition << 166 currentSafety = 0.0 ;
217 << 167 }
218 if(MagSqShift >= sqr(fPreviousSafety)) << 168 else
219 currentSafety = 0.0; << 169 {
220 else << 170 currentSafety = fPreviousSafety - std::sqrt(MagSqShift) ;
221 currentSafety = fPreviousSafety - std::s <<
222 } 171 }
223 172
224 // Is the particle charged or has it a magne << 173 // Is the particle charged ?
225 // 174 //
226 const G4DynamicParticle* pParticle = track.G << 175 G4double particleCharge = pParticle->GetCharge() ;
227 <<
228 const G4double particleMass = pParticle->G <<
229 const G4double particleCharge = pParticle->G <<
230 const G4double kineticEnergy = pParticle->Ge <<
231 176
232 const G4double magneticMoment = pParticle << 177 fGeometryLimitedStep = false ;
233 const G4ThreeVector particleSpin = pParticle << 178 // fEndGlobalTimeComputed = false ;
234 179
235 // There is no need to locate the current vo 180 // There is no need to locate the current volume. It is Done elsewhere:
236 // On track construction << 181 // On track construction
237 // By the tracking, after all AlongStepDoI 182 // By the tracking, after all AlongStepDoIts, in "Relocation"
238 183
239 // Check if the particle has a force, EM or << 184 // Check whether the particle have an (EM) field force exerting upon it
240 // 185 //
>> 186 G4FieldManager* fieldMgr=0;
>> 187 G4bool fieldExertsForce = false ;
>> 188 if( (particleCharge != 0.0) )
>> 189 {
>> 190 fieldMgr= fFieldPropagator->FindAndSetFieldManager( track.GetVolume() );
>> 191 if (fieldMgr != 0) {
>> 192 // Message the field Manager, to configure it for this track
>> 193 fieldMgr->ConfigureForTrack( &track );
>> 194 // Moved here, in order to allow a transition
>> 195 // from a zero-field status (with fieldMgr->(field)0
>> 196 // to a finite field status
>> 197
>> 198 // If the field manager has no field, there is no field !
>> 199 fieldExertsForce = (fieldMgr->GetDetectorField() != 0);
>> 200 }
>> 201 }
>> 202
>> 203 // G4cout << " G4Transport: field exerts force= " << fieldExertsForce
>> 204 // << " fieldMgr= " << fieldMgr << G4endl;
>> 205
>> 206 // Choose the calculation of the transportation: Field or not
>> 207 //
>> 208 if( !fieldExertsForce )
>> 209 {
>> 210 G4double linearStepLength ;
>> 211 if( fShortStepOptimisation && (currentMinimumStep <= currentSafety) )
>> 212 {
>> 213 // The Step is guaranteed to be taken
>> 214 //
>> 215 geometryStepLength = currentMinimumStep ;
>> 216 fGeometryLimitedStep = false ;
>> 217 }
>> 218 else
>> 219 {
>> 220 // Find whether the straight path intersects a volume
>> 221 //
>> 222 linearStepLength = fLinearNavigator->ComputeStep( startPosition,
>> 223 startMomentumDir,
>> 224 currentMinimumStep,
>> 225 newSafety) ;
>> 226 // Remember last safety origin & value.
>> 227 //
>> 228 fPreviousSftOrigin = startPosition ;
>> 229 fPreviousSafety = newSafety ;
>> 230 // fpSafetyHelper->SetCurrentSafety( newSafety, startPosition);
>> 231
>> 232 // The safety at the initial point has been re-calculated:
>> 233 //
>> 234 currentSafety = newSafety ;
>> 235
>> 236 fGeometryLimitedStep= (linearStepLength <= currentMinimumStep);
>> 237 if( fGeometryLimitedStep )
>> 238 {
>> 239 // The geometry limits the Step size (an intersection was found.)
>> 240 geometryStepLength = linearStepLength ;
>> 241 }
>> 242 else
>> 243 {
>> 244 // The full Step is taken.
>> 245 geometryStepLength = currentMinimumStep ;
>> 246 }
>> 247 }
>> 248 endpointDistance = geometryStepLength ;
241 249
242 G4bool eligibleEM = << 250 // Calculate final position
243 (particleCharge != 0.0) || ((magneticMomen << 251 //
244 G4bool eligibleGrav = (particleMass != 0.0) << 252 fTransportEndPosition = startPosition+geometryStepLength*startMomentumDir ;
245 <<
246 fFieldExertedForce = false; <<
247 <<
248 if(eligibleEM || eligibleGrav) <<
249 { <<
250 if(G4FieldManager* fieldMgr = <<
251 fFieldPropagator->FindAndSetFieldMana <<
252 { <<
253 // User can configure the field Manager <<
254 fieldMgr->ConfigureForTrack(&track); <<
255 // Called here to allow a transition fro <<
256 // to finite field (non-zero pointer). <<
257 <<
258 // If the field manager has no field ptr <<
259 // by definition ( = there is no field <<
260 if(const G4Field* ptrField = fieldMgr->G <<
261 fFieldExertedForce = <<
262 eligibleEM || (eligibleGrav && ptrFi <<
263 } <<
264 } <<
265 <<
266 G4double geometryStepLength = currentMinimum <<
267 <<
268 if(currentMinimumStep == 0.0) <<
269 { <<
270 fEndPointDistance = 0.0; <<
271 fGeometryLimitedStep = false; // Old cod <<
272 // Changed to avoid problems when setting <<
273 fMomentumChanged = false; <<
274 fParticleIsLooping = false; <<
275 fEndGlobalTimeComputed = false; <<
276 fTransportEndPosition = startPosition <<
277 fTransportEndMomentumDir = startMomentum <<
278 fTransportEndKineticEnergy = kineticEnergy <<
279 fTransportEndSpin = particleSpin; <<
280 } <<
281 else if(!fFieldExertedForce) <<
282 { <<
283 fGeometryLimitedStep = false; <<
284 if(geometryStepLength > currentSafety || ! <<
285 { <<
286 const G4double linearStepLength = fLinea <<
287 startPosition, startMomentumDir, curre <<
288 <<
289 if(linearStepLength <= currentMinimumSte <<
290 { <<
291 geometryStepLength = linearStepLength; <<
292 fGeometryLimitedStep = true; <<
293 } <<
294 // Remember last safety origin & value. <<
295 // <<
296 fPreviousSftOrigin = startPosition; <<
297 fPreviousSafety = currentSafety; <<
298 fpSafetyHelper->SetCurrentSafety(current <<
299 } <<
300 <<
301 fEndPointDistance = geometryStepLength; <<
302 <<
303 fMomentumChanged = false; <<
304 fParticleIsLooping = false; <<
305 fEndGlobalTimeComputed = false; <<
306 fTransportEndPosition = <<
307 startPosition + geometryStepLength * sta <<
308 fTransportEndMomentumDir = startMomentum <<
309 fTransportEndKineticEnergy = kineticEnergy <<
310 fTransportEndSpin = particleSpin; <<
311 } <<
312 else // A field exerts force <<
313 { <<
314 const auto pParticleDef = pParticle->Ge <<
315 const auto particlePDGSpin = pParticleDef- <<
316 const auto particlePDGMagM = pParticleDef- <<
317 <<
318 auto equationOfMotion = fFieldPropagator-> <<
319 <<
320 // The charge can change (dynamic), theref <<
321 // <<
322 equationOfMotion->SetChargeMomentumMass( <<
323 G4ChargeState(particleCharge, magneticMo <<
324 pParticle->GetTotalMomentum(), particleM <<
325 <<
326 G4FieldTrack aFieldTrack(startPosition, <<
327 track.GetGlobalTi <<
328 startMomentumDir, <<
329 particleCharge, p <<
330 0.0, // Length a <<
331 particlePDGSpin); <<
332 <<
333 // Do the Transport in the field (non rect <<
334 // <<
335 const G4double lengthAlongCurve = fFieldPr <<
336 aFieldTrack, currentMinimumStep, current <<
337 kineticEnergy < fThreshold_Important_Ene <<
338 <<
339 if(lengthAlongCurve < geometryStepLength) <<
340 geometryStepLength = lengthAlongCurve; <<
341 <<
342 // Remember last safety origin & value. <<
343 // <<
344 fPreviousSftOrigin = startPosition; <<
345 fPreviousSafety = currentSafety; <<
346 fpSafetyHelper->SetCurrentSafety(currentSa <<
347 <<
348 fGeometryLimitedStep = fFieldPropagator->I <<
349 // <<
350 // It is possible that step was reduced in <<
351 // previous zero steps. To cope with case <<
352 // in full, we must rely on PiF to obtain <<
353 253
354 G4bool changesEnergy = << 254 // Momentum direction, energy and polarisation are unchanged by transport
355 fFieldPropagator->GetCurrentFieldManager << 255 //
>> 256 fTransportEndMomentumDir = startMomentumDir ;
>> 257 fTransportEndKineticEnergy = track.GetKineticEnergy() ;
>> 258 fTransportEndSpin = track.GetPolarization();
>> 259 fParticleIsLooping = false ;
>> 260 fMomentumChanged = false ;
>> 261 fEndGlobalTimeComputed = false ;
>> 262 }
>> 263 else // A field exerts force
>> 264 {
>> 265 G4double momentumMagnitude = pParticle->GetTotalMomentum() ;
>> 266 G4ThreeVector EndUnitMomentum ;
>> 267 G4double lengthAlongCurve ;
>> 268 G4double restMass = pParticleDef->GetPDGMass() ;
>> 269
>> 270 fFieldPropagator->SetChargeMomentumMass( particleCharge, // in e+ units
>> 271 momentumMagnitude, // in Mev/c
>> 272 restMass ) ;
356 273
357 fMomentumChanged = true; << 274 G4ThreeVector spin = track.GetPolarization() ;
358 fParticleIsLooping = fFieldPropagator->IsP << 275 G4FieldTrack aFieldTrack = G4FieldTrack( startPosition,
>> 276 track.GetMomentumDirection(),
>> 277 0.0,
>> 278 track.GetKineticEnergy(),
>> 279 restMass,
>> 280 track.GetVelocity(),
>> 281 track.GetGlobalTime(), // Lab.
>> 282 track.GetProperTime(), // Part.
>> 283 &spin ) ;
>> 284 if( currentMinimumStep > 0 )
>> 285 {
>> 286 // Do the Transport in the field (non recti-linear)
>> 287 //
>> 288 lengthAlongCurve = fFieldPropagator->ComputeStep( aFieldTrack,
>> 289 currentMinimumStep,
>> 290 currentSafety,
>> 291 track.GetVolume() ) ;
>> 292 fGeometryLimitedStep= lengthAlongCurve < currentMinimumStep;
>> 293 if( fGeometryLimitedStep ) {
>> 294 geometryStepLength = lengthAlongCurve ;
>> 295 } else {
>> 296 geometryStepLength = currentMinimumStep ;
>> 297 }
>> 298 }
>> 299 else
>> 300 {
>> 301 geometryStepLength = lengthAlongCurve= 0.0 ;
>> 302 fGeometryLimitedStep = false ;
>> 303 }
359 304
360 fEndGlobalTimeComputed = changesEnergy; << 305 // Remember last safety origin & value.
361 fTransportEndPosition = aFieldTrack.Get << 306 //
362 fTransportEndMomentumDir = aFieldTrack.Get << 307 fPreviousSftOrigin = startPosition ;
>> 308 fPreviousSafety = currentSafety ;
>> 309 // fpSafetyHelper->SetCurrentSafety( newSafety, startPosition);
>> 310
>> 311 // Get the End-Position and End-Momentum (Dir-ection)
>> 312 //
>> 313 fTransportEndPosition = aFieldTrack.GetPosition() ;
363 314
364 // G4cout << " G4Transport: End of step pM << 315 // Momentum: Magnitude and direction can be changed too now ...
>> 316 //
>> 317 fMomentumChanged = true ;
>> 318 fTransportEndMomentumDir = aFieldTrack.GetMomentumDir() ;
365 319
366 fEndPointDistance = (fTransportEndPositio << 320 fTransportEndKineticEnergy = aFieldTrack.GetKineticEnergy() ;
367 321
368 // Ignore change in energy for fields that << 322 if( fFieldPropagator->GetCurrentFieldManager()->DoesFieldChangeEnergy() )
369 // This hides the integration error, but g << 323 {
370 fTransportEndKineticEnergy = << 324 // If the field can change energy, then the time must be integrated
371 changesEnergy ? aFieldTrack.GetKineticEn << 325 // - so this should have been updated
372 fTransportEndSpin = aFieldTrack.GetSpin(); << 326 //
>> 327 fCandidateEndGlobalTime = aFieldTrack.GetLabTimeOfFlight();
>> 328 fEndGlobalTimeComputed = true;
373 329
374 if(fEndGlobalTimeComputed) << 330 // was ( fCandidateEndGlobalTime != track.GetGlobalTime() );
375 { << 331 // a cleaner way is to have FieldTrack knowing whether time is updated.
376 // If the field can change energy, then << 332 }
377 // - so this should have been updated << 333 else
378 // << 334 {
379 fCandidateEndGlobalTime = aFieldTrack.Ge << 335 // The energy should be unchanged by field transport,
>> 336 // - so the time changed will be calculated elsewhere
>> 337 //
>> 338 fEndGlobalTimeComputed = false;
380 339
381 // was ( fCandidateEndGlobalTime != trac << 340 // Check that the integration preserved the energy
382 // a cleaner way is to have FieldTrack k << 341 // - and if not correct this!
383 } << 342 G4double startEnergy= track.GetKineticEnergy();
384 #if defined(G4VERBOSE) || defined(G4DEBUG_TRAN << 343 G4double endEnergy= fTransportEndKineticEnergy;
385 else << 344
386 { << 345 static G4int no_inexact_steps=0, no_large_ediff;
387 // The energy should be unchanged by fie << 346 G4double absEdiff = std::fabs(startEnergy- endEnergy);
388 // - so the time changed will be calc << 347 if( absEdiff > perMillion * endEnergy )
389 // << 348 {
390 // Check that the integration preserved << 349 no_inexact_steps++;
391 // - and if not correct this! << 350 // Possible statistics keeping here ...
392 G4double startEnergy = kineticEnergy; << 351 }
393 G4double endEnergy = fTransportEndKine << 352 if( fVerboseLevel > 1 )
394 <<
395 static G4ThreadLocal G4int no_large_edif <<
396 if(verboseLevel > 1) <<
397 { <<
398 if(std::fabs(startEnergy - endEnergy) <<
399 { 353 {
400 static G4ThreadLocal G4int no_warnin << 354 if( std::fabs(startEnergy- endEnergy) > perThousand * endEnergy )
401 moduloFac <<
402 no_large_ediff++; <<
403 if((no_large_ediff % warnModulo) == <<
404 { 355 {
405 no_warnings++; << 356 static G4int no_warnings= 0, warnModulo=1, moduloFactor= 10;
406 std::ostringstream message; << 357 no_large_ediff ++;
407 message << "Energy change in Step << 358 if( (no_large_ediff% warnModulo) == 0 )
408 << G4endl << " Relativ <<
409 << std::setw(15) << (endEn <<
410 << G4endl << " Startin <<
411 << startEnergy / MeV << " <<
412 << " Ending E= " << <<
413 << " MeV " << G4endl <<
414 << "Energy has been correc <<
415 << " field propagation par <<
416 if((verboseLevel > 2) || (no_warni <<
417 (no_large_ediff == warnModulo * <<
418 { <<
419 message << "These include Epsilo <<
420 << G4endl <<
421 << "which determine frac <<
422 "integrated quantitie <<
423 << G4endl <<
424 << "Note also the influe <<
425 "integration steps." <<
426 << G4endl; <<
427 } <<
428 message << "Bad 'endpoint'. Energy <<
429 << G4endl << "Has occurred <<
430 << " times."; <<
431 G4Exception("G4Transportation::Alo <<
432 JustWarning, message); <<
433 if(no_large_ediff == warnModulo * <<
434 { 359 {
435 warnModulo *= moduloFactor; << 360 no_warnings++;
>> 361 G4cout << "WARNING - G4Transportation::AlongStepGetPIL() "
>> 362 << " Energy change in Step is above 1^-3 relative value. " << G4endl
>> 363 << " Relative change in 'tracking' step = "
>> 364 << std::setw(15) << (endEnergy-startEnergy)/startEnergy << G4endl
>> 365 << " Starting E= " << std::setw(12) << startEnergy / MeV << " MeV " << G4endl
>> 366 << " Ending E= " << std::setw(12) << endEnergy / MeV << " MeV " << G4endl;
>> 367 G4cout << " Energy has been corrected -- however, review"
>> 368 << " field propagation parameters for accuracy." << G4endl;
>> 369 if( (fVerboseLevel > 2 ) || (no_warnings<4) || (no_large_ediff == warnModulo * moduloFactor) ){
>> 370 G4cout << " These include EpsilonStepMax(/Min) in G4FieldManager "
>> 371 << " which determine fractional error per step for integrated quantities. " << G4endl
>> 372 << " Note also the influence of the permitted number of integration steps."
>> 373 << G4endl;
>> 374 }
>> 375 G4cerr << "ERROR - G4Transportation::AlongStepGetPIL()" << G4endl
>> 376 << " Bad 'endpoint'. Energy change detected"
>> 377 << " and corrected. "
>> 378 << " Has occurred already "
>> 379 << no_large_ediff << " times." << G4endl;
>> 380 if( no_large_ediff == warnModulo * moduloFactor )
>> 381 {
>> 382 warnModulo *= moduloFactor;
>> 383 }
436 } 384 }
437 } 385 }
438 } << 386 } // end of if (fVerboseLevel)
439 } // end of if (verboseLevel) << 387
440 } << 388 // Correct the energy for fields that conserve it
441 #endif << 389 // This - hides the integration error
>> 390 // - but gives a better physical answer
>> 391 fTransportEndKineticEnergy= track.GetKineticEnergy();
>> 392 }
>> 393
>> 394 fTransportEndSpin = aFieldTrack.GetSpin();
>> 395 fParticleIsLooping = fFieldPropagator->IsParticleLooping() ;
>> 396 endpointDistance = (fTransportEndPosition - startPosition).mag() ;
>> 397 }
>> 398
>> 399 // If we are asked to go a step length of 0, and we are on a boundary
>> 400 // then a boundary will also limit the step -> we must flag this.
>> 401 //
>> 402 if( currentMinimumStep == 0.0 )
>> 403 {
>> 404 if( currentSafety == 0.0 ) fGeometryLimitedStep = true ;
442 } 405 }
443 406
444 // Update the safety starting from the end-p 407 // Update the safety starting from the end-point,
445 // if it will become negative at the end-poi 408 // if it will become negative at the end-point.
446 // 409 //
447 if(currentSafety < fEndPointDistance) << 410 if( currentSafety < endpointDistance )
448 { 411 {
449 if(particleCharge != 0.0) << 412 // if( particleCharge == 0.0 )
450 { << 413 // G4cout << " Avoiding call to ComputeSafety : charge = 0.0 " << G4endl;
451 G4double endSafety = << 414
452 fLinearNavigator->ComputeSafety(fTrans << 415 if( particleCharge != 0.0 ) {
453 currentSafety = endSafety; <<
454 fPreviousSftOrigin = fTransportEndPositi <<
455 fPreviousSafety = currentSafety; <<
456 fpSafetyHelper->SetCurrentSafety(current <<
457 <<
458 // Because the Stepping Manager assumes <<
459 // add the StepLength <<
460 // <<
461 currentSafety += fEndPointDistance; <<
462 <<
463 #ifdef G4DEBUG_TRANSPORT <<
464 G4cout.precision(12); <<
465 G4cout << "***G4Transportation::AlongSte <<
466 G4cout << " Called Navigator->ComputeSa <<
467 << " and it returned safety= <<
468 G4cout << " Adding endpoint distance <<
469 << " to obtain pseudo-safety= <<
470 } <<
471 else <<
472 { <<
473 G4cout << "***G4Transportation::AlongSte <<
474 G4cout << " Avoiding call to ComputeSaf <<
475 G4cout << " charge = " << particl <<
476 G4cout << " mag moment = " << magneti <<
477 #endif <<
478 } <<
479 } <<
480 416
481 fFirstStepInVolume = fNewTrack || fLastStepI << 417 G4double endSafety =
482 fLastStepInVolume = false; << 418 fLinearNavigator->ComputeSafety( fTransportEndPosition) ;
483 fNewTrack = false; << 419 currentSafety = endSafety ;
>> 420 fPreviousSftOrigin = fTransportEndPosition ;
>> 421 fPreviousSafety = currentSafety ;
>> 422 fpSafetyHelper->SetCurrentSafety( currentSafety, fTransportEndPosition);
>> 423
>> 424 // Because the Stepping Manager assumes it is from the start point,
>> 425 // add the StepLength
>> 426 //
>> 427 currentSafety += endpointDistance ;
>> 428
>> 429 #ifdef G4DEBUG_TRANSPORT
>> 430 G4cout.precision(12) ;
>> 431 G4cout << "***G4Transportation::AlongStepGPIL ** " << G4endl ;
>> 432 G4cout << " Called Navigator->ComputeSafety at " << fTransportEndPosition
>> 433 << " and it returned safety= " << endSafety << G4endl ;
>> 434 G4cout << " Adding endpoint distance " << endpointDistance
>> 435 << " to obtain pseudo-safety= " << currentSafety << G4endl ;
>> 436 #endif
>> 437 }
>> 438 }
484 439
485 fParticleChange.ProposeFirstStepInVolume(fFi << 440 fParticleChange.ProposeTrueStepLength(geometryStepLength) ;
486 fParticleChange.ProposeTrueStepLength(geomet <<
487 441
488 return geometryStepLength; << 442 return geometryStepLength ;
489 } 443 }
490 444
491 ////////////////////////////////////////////// 445 //////////////////////////////////////////////////////////////////////////
492 // 446 //
493 // Initialize ParticleChange (by setting al 447 // Initialize ParticleChange (by setting all its members equal
494 // to correspond 448 // to corresponding members in G4Track)
495 449
496 G4VParticleChange* G4Transportation::AlongStep 450 G4VParticleChange* G4Transportation::AlongStepDoIt( const G4Track& track,
497 451 const G4Step& stepData )
498 { 452 {
499 #if defined(G4VERBOSE) || defined(G4DEBUG_TRAN << 453 static G4int noCalls=0;
500 static G4ThreadLocal G4long noCallsASDI=0; << 454 static const G4ParticleDefinition* fOpticalPhoton =
501 noCallsASDI++; << 455 G4ParticleTable::GetParticleTable()->FindParticle("opticalphoton");
502 #else <<
503 #define noCallsASDI 0 <<
504 #endif <<
505 456
506 if(fGeometryLimitedStep) << 457 noCalls++;
507 { <<
508 stepData.GetPostStepPoint()->SetStepStatus <<
509 } <<
510 458
511 fParticleChange.Initialize(track) ; 459 fParticleChange.Initialize(track) ;
512 460
513 // Code for specific process 461 // Code for specific process
514 // 462 //
515 fParticleChange.ProposePosition(fTransportEn 463 fParticleChange.ProposePosition(fTransportEndPosition) ;
516 fParticleChange.ProposeMomentumDirection(fTr 464 fParticleChange.ProposeMomentumDirection(fTransportEndMomentumDir) ;
517 fParticleChange.ProposeEnergy(fTransportEndK 465 fParticleChange.ProposeEnergy(fTransportEndKineticEnergy) ;
518 fParticleChange.SetMomentumChanged(fMomentum 466 fParticleChange.SetMomentumChanged(fMomentumChanged) ;
519 467
520 fParticleChange.ProposePolarization(fTranspo 468 fParticleChange.ProposePolarization(fTransportEndSpin);
521 << 469
522 G4double deltaTime = 0.0 ; 470 G4double deltaTime = 0.0 ;
523 471
524 // Calculate Lab Time of Flight (ONLY if fi 472 // Calculate Lab Time of Flight (ONLY if field Equations used it!)
525 // G4double endTime = fCandidateEndGlobalT << 473 // G4double endTime = fCandidateEndGlobalTime;
526 // G4double delta_time = endTime - startTime << 474 // G4double delta_time = endTime - startTime;
527 475
528 G4double startTime = track.GetGlobalTime() ; 476 G4double startTime = track.GetGlobalTime() ;
529 477
530 if (!fEndGlobalTimeComputed) 478 if (!fEndGlobalTimeComputed)
531 { 479 {
532 // The time was not integrated .. make th 480 // The time was not integrated .. make the best estimate possible
533 // 481 //
534 G4double initialVelocity = stepData.GetPr << 482 G4double finalVelocity = track.GetVelocity() ;
535 G4double stepLength = track.GetStepL << 483 G4double initialVelocity = stepData.GetPreStepPoint()->GetVelocity() ;
>> 484 G4double stepLength = track.GetStepLength() ;
536 485
537 deltaTime= 0.0; // in case initialVeloci 486 deltaTime= 0.0; // in case initialVelocity = 0
538 if ( initialVelocity > 0.0 ) { deltaTime << 487 const G4DynamicParticle* fpDynamicParticle = track.GetDynamicParticle();
539 << 488 if (fpDynamicParticle->GetDefinition()== fOpticalPhoton)
>> 489 {
>> 490 // A photon is in the medium of the final point
>> 491 // during the step, so it has the final velocity.
>> 492 deltaTime = stepLength/finalVelocity ;
>> 493 }
>> 494 else if (finalVelocity > 0.0)
>> 495 {
>> 496 G4double meanInverseVelocity ;
>> 497 // deltaTime = stepLength/finalVelocity ;
>> 498 meanInverseVelocity = 0.5
>> 499 * ( 1.0 / initialVelocity + 1.0 / finalVelocity ) ;
>> 500 deltaTime = stepLength * meanInverseVelocity ;
>> 501 }
>> 502 else if( initialVelocity > 0.0 )
>> 503 {
>> 504 deltaTime = stepLength/initialVelocity ;
>> 505 }
540 fCandidateEndGlobalTime = startTime + d 506 fCandidateEndGlobalTime = startTime + deltaTime ;
541 fParticleChange.ProposeLocalTime( track. <<
542 } 507 }
543 else 508 else
544 { 509 {
545 deltaTime = fCandidateEndGlobalTime - sta 510 deltaTime = fCandidateEndGlobalTime - startTime ;
546 fParticleChange.ProposeGlobalTime( fCandi <<
547 } 511 }
548 512
>> 513 fParticleChange.ProposeGlobalTime( fCandidateEndGlobalTime ) ;
549 514
550 // Now Correct by Lorentz factor to get delt << 515 // Now Correct by Lorentz factor to get "proper" deltaTime
551 516
552 G4double restMass = track.GetDynamicP 517 G4double restMass = track.GetDynamicParticle()->GetMass() ;
553 G4double deltaProperTime = deltaTime*( restM 518 G4double deltaProperTime = deltaTime*( restMass/track.GetTotalEnergy() ) ;
554 519
555 fParticleChange.ProposeProperTime(track.GetP 520 fParticleChange.ProposeProperTime(track.GetProperTime() + deltaProperTime) ;
556 //fParticleChange.ProposeTrueStepLength( tra << 521 //fParticleChange. ProposeTrueStepLength( track.GetStepLength() ) ;
557 522
558 // If the particle is caught looping or is s 523 // If the particle is caught looping or is stuck (in very difficult
559 // boundaries) in a magnetic field (doing ma << 524 // boundaries) in a magnetic field (doing many steps)
>> 525 // THEN this kills it ...
560 // 526 //
561 if ( fParticleIsLooping ) 527 if ( fParticleIsLooping )
562 { 528 {
563 G4double endEnergy= fTransportEndKinetic 529 G4double endEnergy= fTransportEndKineticEnergy;
564 fNoLooperTrials ++; <<
565 auto particleType= track.GetDynamicParti <<
566 <<
567 G4bool stable = particleType->GetPDGStab <<
568 G4bool candidateForEnd = (endEnergy < fT <<
569 || (fNoLooperTrial <<
570 G4bool unstableAndKillable = !stable && <<
571 G4bool unstableForEnd = (endEnergy < fTh <<
572 && (fNoLooperTri <<
573 if( (candidateForEnd && stable) || (unst <<
574 { <<
575 // Kill the looping particle <<
576 // <<
577 fParticleChange.ProposeTrackStatus( fS <<
578 G4int particlePDG= particleType->GetPD <<
579 const G4int electronPDG= 11; // G4Elec <<
580 <<
581 // Simple statistics <<
582 fSumEnergyKilled += endEnergy; <<
583 fSumEnerSqKilled += endEnergy * endEne <<
584 fNumLoopersKilled++; <<
585 <<
586 if( endEnergy > fMaxEnergyKilled ) { <<
587 fMaxEnergyKilled = endEnergy; <<
588 fMaxEnergyKilledPDG = particlePDG; <<
589 } <<
590 if( particleType->GetPDGEncoding() != <<
591 { <<
592 fSumEnergyKilled_NonElectron += end <<
593 fSumEnerSqKilled_NonElectron += end <<
594 fNumLoopersKilled_NonElectron++; <<
595 <<
596 if( endEnergy > fMaxEnergyKilled_No <<
597 { <<
598 fMaxEnergyKilled_NonElectron = e <<
599 fMaxEnergyKilled_NonElecPDG = p <<
600 } <<
601 } <<
602 530
603 if( endEnergy > fThreshold_Warning_Ene << 531 if( (endEnergy < fThreshold_Important_Energy)
604 { << 532 || (fNoLooperTrials >= fThresholdTrials ) ){
605 fpLogger->ReportLoopingTrack( track, << 533 // Kill the looping particle
606 noCall << 534 //
607 } << 535 fParticleChange.ProposeTrackStatus( fStopAndKill ) ;
608 fNoLooperTrials=0; << 536
>> 537 // 'Bare' statistics
>> 538 fSumEnergyKilled += endEnergy;
>> 539 if( endEnergy > fMaxEnergyKilled) { fMaxEnergyKilled= endEnergy; }
>> 540
>> 541 #ifdef G4VERBOSE
>> 542 if( (fVerboseLevel > 1) ||
>> 543 ( endEnergy > fThreshold_Warning_Energy ) ) {
>> 544 G4cout << " G4Transportation is killing track that is looping or stuck "
>> 545 << G4endl
>> 546 << " This track has " << track.GetKineticEnergy() / MeV
>> 547 << " MeV energy." << G4endl;
>> 548 G4cout << " Number of trials = " << fNoLooperTrials
>> 549 << " No of calls to AlongStepDoIt = " << noCalls
>> 550 << G4endl;
>> 551 }
>> 552 #endif
>> 553 fNoLooperTrials=0;
609 } 554 }
610 else << 555 else{
611 { << 556 fNoLooperTrials ++;
612 fMaxEnergySaved = std::max( endEnergy, <<
613 if( fNoLooperTrials == 1 ) { <<
614 fSumEnergySaved += endEnergy; <<
615 if ( !stable ) <<
616 fSumEnergyUnstableSaved += endEne <<
617 } <<
618 #ifdef G4VERBOSE 557 #ifdef G4VERBOSE
619 if( verboseLevel > 2 && ! fSilenceLoop << 558 if( (fVerboseLevel > 2) ){
620 { << 559 G4cout << " G4Transportation::AlongStepDoIt(): Particle looping - "
621 G4cout << " " << __func__ << 560 << " Number of trials = " << fNoLooperTrials
622 << " Particle is looping but << 561 << " No of calls to = " << noCalls
623 << " Number of trials = " < << 562 << G4endl;
624 << " No of calls to = " << << 563 }
625 } <<
626 #endif 564 #endif
627 } 565 }
628 } << 566 }else{
629 else <<
630 { <<
631 fNoLooperTrials=0; 567 fNoLooperTrials=0;
632 } 568 }
633 569
634 // Another (sometimes better way) is to use 570 // Another (sometimes better way) is to use a user-limit maximum Step size
635 // to alleviate this problem .. 571 // to alleviate this problem ..
636 572
637 // Introduce smooth curved trajectories to p 573 // Introduce smooth curved trajectories to particle-change
638 // 574 //
639 fParticleChange.SetPointerToVectorOfAuxiliar 575 fParticleChange.SetPointerToVectorOfAuxiliaryPoints
640 (fFieldPropagator->GimmeTrajectoryVectorAn 576 (fFieldPropagator->GimmeTrajectoryVectorAndForgetIt() );
641 577
642 return &fParticleChange ; 578 return &fParticleChange ;
643 } 579 }
644 580
645 ////////////////////////////////////////////// 581 //////////////////////////////////////////////////////////////////////////
646 // 582 //
647 // This ensures that the PostStep action is a 583 // This ensures that the PostStep action is always called,
648 // so that it can do the relocation if it is 584 // so that it can do the relocation if it is needed.
649 // 585 //
650 586
651 G4double G4Transportation:: 587 G4double G4Transportation::
652 PostStepGetPhysicalInteractionLength( const G4 588 PostStepGetPhysicalInteractionLength( const G4Track&,
653 G4 589 G4double, // previousStepSize
654 G4 590 G4ForceCondition* pForceCond )
655 { << 591 {
656 fFieldExertedForce = false; // Not known <<
657 *pForceCond = Forced ; 592 *pForceCond = Forced ;
658 return DBL_MAX ; // was kInfinity ; but con 593 return DBL_MAX ; // was kInfinity ; but convention now is DBL_MAX
659 } 594 }
660 595
661 ////////////////////////////////////////////// 596 /////////////////////////////////////////////////////////////////////////////
662 <<
663 void G4Transportation::SetTouchableInformation <<
664 { <<
665 const G4VPhysicalVolume* pNewVol = touchable <<
666 const G4Material* pNewMaterial = 0 ; <<
667 G4VSensitiveDetector* pNewSensitiveDetector <<
668 <<
669 if( pNewVol != 0 ) <<
670 { <<
671 pNewMaterial= pNewVol->GetLogicalVolume()- <<
672 pNewSensitiveDetector= pNewVol->GetLogical <<
673 } <<
674 <<
675 fParticleChange.SetMaterialInTouchable( (G4M <<
676 fParticleChange.SetSensitiveDetectorInToucha <<
677 // temporarily until Get/Set Material of Par <<
678 // and StepPoint can be made const. <<
679 <<
680 const G4MaterialCutsCouple* pNewMaterialCuts <<
681 if( pNewVol != 0 ) <<
682 { <<
683 pNewMaterialCutsCouple=pNewVol->GetLogical <<
684 } <<
685 <<
686 if ( pNewVol!=0 && pNewMaterialCutsCouple!=0 <<
687 && pNewMaterialCutsCouple->GetMaterial()!= <<
688 { <<
689 // for parametrized volume <<
690 // <<
691 pNewMaterialCutsCouple = <<
692 G4ProductionCutsTable::GetProductionCuts <<
693 ->GetMaterialCuts <<
694 pNewMaterialCut <<
695 } <<
696 fParticleChange.SetMaterialCutsCoupleInTouch <<
697 <<
698 // Set the touchable in ParticleChange <<
699 // this must always be done because the part <<
700 // uses this value to overwrite the current <<
701 // <<
702 fParticleChange.SetTouchableHandle(touchable <<
703 } <<
704 <<
705 ////////////////////////////////////////////// <<
706 // 597 //
707 598
708 G4VParticleChange* G4Transportation::PostStepD 599 G4VParticleChange* G4Transportation::PostStepDoIt( const G4Track& track,
709 600 const G4Step& )
710 { 601 {
711 G4TouchableHandle retCurrentTouchable ; / << 602 G4TouchableHandle retCurrentTouchable ; // The one to return
712 G4bool isLastStep= false; <<
713 603
714 // Initialize ParticleChange (by setting al 604 // Initialize ParticleChange (by setting all its members equal
715 // to correspond 605 // to corresponding members in G4Track)
716 // fParticleChange.Initialize(track) ; // T 606 // fParticleChange.Initialize(track) ; // To initialise TouchableChange
717 607
718 fParticleChange.ProposeTrackStatus(track.Get 608 fParticleChange.ProposeTrackStatus(track.GetTrackStatus()) ;
719 609
720 // If the Step was determined by the volume 610 // If the Step was determined by the volume boundary,
721 // logically relocate the particle 611 // logically relocate the particle
722 << 612
723 if(fGeometryLimitedStep) 613 if(fGeometryLimitedStep)
724 { 614 {
725 // fCurrentTouchable will now become the p 615 // fCurrentTouchable will now become the previous touchable,
726 // and what was the previous will be freed 616 // and what was the previous will be freed.
727 // (Needed because the preStepPoint can po 617 // (Needed because the preStepPoint can point to the previous touchable)
728 618
729 fLinearNavigator->SetGeometricallyLimitedS 619 fLinearNavigator->SetGeometricallyLimitedStep() ;
730 fLinearNavigator-> 620 fLinearNavigator->
731 LocateGlobalPointAndUpdateTouchableHandle( 621 LocateGlobalPointAndUpdateTouchableHandle( track.GetPosition(),
732 622 track.GetMomentumDirection(),
733 623 fCurrentTouchableHandle,
734 624 true ) ;
735 // Check whether the particle is out of th 625 // Check whether the particle is out of the world volume
736 // If so it has exited and must be killed. 626 // If so it has exited and must be killed.
737 // 627 //
738 if( fCurrentTouchableHandle->GetVolume() = 628 if( fCurrentTouchableHandle->GetVolume() == 0 )
739 { 629 {
740 fParticleChange.ProposeTrackStatus( fSt 630 fParticleChange.ProposeTrackStatus( fStopAndKill ) ;
741 } 631 }
742 retCurrentTouchable = fCurrentTouchableHan 632 retCurrentTouchable = fCurrentTouchableHandle ;
743 fParticleChange.SetTouchableHandle( fCurre 633 fParticleChange.SetTouchableHandle( fCurrentTouchableHandle ) ;
744 <<
745 // Update the Step flag which identifies t <<
746 if( !fFieldExertedForce ) <<
747 isLastStep = fLinearNavigator->ExitedM <<
748 || fLinearNavigator->Entered <<
749 else <<
750 isLastStep = fFieldPropagator->IsLastSt <<
751 } 634 }
752 else // fGeometryLimitedStep 635 else // fGeometryLimitedStep is false
753 { 636 {
754 // This serves only to move the Navigator' 637 // This serves only to move the Navigator's location
755 // 638 //
756 fLinearNavigator->LocateGlobalPointWithinV 639 fLinearNavigator->LocateGlobalPointWithinVolume( track.GetPosition() ) ;
757 640
758 // The value of the track's current Toucha 641 // The value of the track's current Touchable is retained.
759 // (and it must be correct because we must 642 // (and it must be correct because we must use it below to
760 // overwrite the (unset) one in particle c 643 // overwrite the (unset) one in particle change)
761 // It must be fCurrentTouchable too ?? 644 // It must be fCurrentTouchable too ??
762 // 645 //
763 fParticleChange.SetTouchableHandle( track. 646 fParticleChange.SetTouchableHandle( track.GetTouchableHandle() ) ;
764 retCurrentTouchable = track.GetTouchableHa 647 retCurrentTouchable = track.GetTouchableHandle() ;
765 <<
766 isLastStep= false; <<
767 } // endif ( fGeometryLimitedStep ) 648 } // endif ( fGeometryLimitedStep )
768 fLastStepInVolume= isLastStep; <<
769 <<
770 fParticleChange.ProposeFirstStepInVolume(fFi <<
771 fParticleChange.ProposeLastStepInVolume(isLa <<
772 649
773 SetTouchableInformation(retCurrentTouchable) << 650 const G4VPhysicalVolume* pNewVol = retCurrentTouchable->GetVolume() ;
>> 651 const G4Material* pNewMaterial = 0 ;
>> 652 const G4VSensitiveDetector* pNewSensitiveDetector = 0 ;
>> 653
>> 654 if( pNewVol != 0 )
>> 655 {
>> 656 pNewMaterial= pNewVol->GetLogicalVolume()->GetMaterial();
>> 657 pNewSensitiveDetector= pNewVol->GetLogicalVolume()->GetSensitiveDetector();
>> 658 }
>> 659
>> 660 // ( <const_cast> pNewMaterial ) ;
>> 661 // ( <const_cast> pNewSensitiveDetector) ;
>> 662
>> 663 fParticleChange.SetMaterialInTouchable( (G4Material *) pNewMaterial ) ;
>> 664 fParticleChange.SetSensitiveDetectorInTouchable( (G4VSensitiveDetector *) pNewSensitiveDetector ) ;
>> 665
>> 666 const G4MaterialCutsCouple* pNewMaterialCutsCouple = 0;
>> 667 if( pNewVol != 0 )
>> 668 {
>> 669 pNewMaterialCutsCouple=pNewVol->GetLogicalVolume()->GetMaterialCutsCouple();
>> 670 }
>> 671
>> 672 if( pNewVol!=0 && pNewMaterialCutsCouple!=0 && pNewMaterialCutsCouple->GetMaterial()!=pNewMaterial )
>> 673 {
>> 674 // for parametrized volume
>> 675 //
>> 676 pNewMaterialCutsCouple =
>> 677 G4ProductionCutsTable::GetProductionCutsTable()
>> 678 ->GetMaterialCutsCouple(pNewMaterial,
>> 679 pNewMaterialCutsCouple->GetProductionCuts());
>> 680 }
>> 681 fParticleChange.SetMaterialCutsCoupleInTouchable( pNewMaterialCutsCouple );
>> 682
>> 683 // temporarily until Get/Set Material of ParticleChange,
>> 684 // and StepPoint can be made const.
>> 685 // Set the touchable in ParticleChange
>> 686 // this must always be done because the particle change always
>> 687 // uses this value to overwrite the current touchable pointer.
>> 688 //
>> 689 fParticleChange.SetTouchableHandle(retCurrentTouchable) ;
774 690
775 return &fParticleChange ; 691 return &fParticleChange ;
776 } 692 }
777 693
778 ////////////////////////////////////////////// << 694 // New method takes over the responsibility to reset the state of G4Transportation
779 // New method takes over the responsibility to << 695 // object at the start of a new track or the resumption of a suspended track.
780 // G4Transportation object at the start of a n <<
781 // of a suspended track. <<
782 // <<
783 696
784 void 697 void
785 G4Transportation::StartTracking(G4Track* aTrac 698 G4Transportation::StartTracking(G4Track* aTrack)
786 { 699 {
787 G4VProcess::StartTracking(aTrack); 700 G4VProcess::StartTracking(aTrack);
788 fNewTrack= true; <<
789 fFirstStepInVolume= true; <<
790 fLastStepInVolume= false; <<
791 <<
792 // The actions here are those that were take <<
793 // when track.GetCurrentStepNumber()==1 <<
794 701
795 // Whether field exists should be determined << 702 // The actions here are those that were taken in AlongStepGPIL
796 G4FieldManagerStore* fieldMgrStore= G4FieldM << 703 // when track.GetCurrentStepNumber()==1
797 fAnyFieldExists = fieldMgrStore->size() > 0; << 704
798 <<
799 // reset safety value and center 705 // reset safety value and center
800 // 706 //
801 fPreviousSafety = 0.0 ; 707 fPreviousSafety = 0.0 ;
802 fPreviousSftOrigin = G4ThreeVector(0.,0.,0.) 708 fPreviousSftOrigin = G4ThreeVector(0.,0.,0.) ;
803 709
804 // reset looping counter -- for motion in fi 710 // reset looping counter -- for motion in field
805 fNoLooperTrials= 0; 711 fNoLooperTrials= 0;
806 // Must clear this state .. else it depends 712 // Must clear this state .. else it depends on last track's value
807 // --> a better solution would set this fro 713 // --> a better solution would set this from state of suspended track TODO ?
808 // Was if( aTrack->GetCurrentStepNumber()==1 714 // Was if( aTrack->GetCurrentStepNumber()==1 ) { .. }
809 715
810 // ChordFinder reset internal state 716 // ChordFinder reset internal state
811 // 717 //
812 if( fFieldPropagator && fAnyFieldExists ) << 718 if( DoesGlobalFieldExist() ) {
813 { <<
814 fFieldPropagator->ClearPropagatorState(); 719 fFieldPropagator->ClearPropagatorState();
815 // Resets all state of field propagator << 720 // Resets all state of field propagator class (ONLY)
816 // values (in case of overlaps and to w << 721 // including safety values (in case of overlaps and to wipe for first track).
>> 722
>> 723 // G4ChordFinder* chordF= fFieldPropagator->GetChordFinder();
>> 724 // if( chordF ) chordF->ResetStepEstimate();
817 } 725 }
818 726
819 // Make sure to clear the chord finders of a << 727 // Make sure to clear the chord finders of all fields (ie managers)
820 // << 728 static G4FieldManagerStore* fieldMgrStore= G4FieldManagerStore::GetInstance();
821 fieldMgrStore->ClearAllChordFindersState(); 729 fieldMgrStore->ClearAllChordFindersState();
822 730
823 // Update the current touchable handle (fro 731 // Update the current touchable handle (from the track's)
824 // 732 //
825 fCurrentTouchableHandle = aTrack->GetTouchab 733 fCurrentTouchableHandle = aTrack->GetTouchableHandle();
826 <<
827 // Inform field propagator of new track <<
828 // <<
829 fFieldPropagator->PrepareNewTrack(); <<
830 } <<
831 <<
832 ////////////////////////////////////////////// <<
833 // <<
834 <<
835 G4bool G4Transportation::EnableMagneticMoment( <<
836 { <<
837 G4bool lastValue= fUseMagneticMoment; <<
838 fUseMagneticMoment= useMoment; <<
839 return lastValue; <<
840 } <<
841 <<
842 ////////////////////////////////////////////// <<
843 // <<
844 <<
845 G4bool G4Transportation::EnableGravity(G4bool <<
846 { <<
847 G4bool lastValue= fUseGravity; <<
848 fUseGravity= useGravity; <<
849 return lastValue; <<
850 } <<
851 <<
852 ////////////////////////////////////////////// <<
853 // <<
854 // Supress (or not) warnings about 'looping' <<
855 <<
856 void G4Transportation::SetSilenceLooperWarning <<
857 { <<
858 fSilenceLooperWarnings= val; // Flag to *Su <<
859 } <<
860 <<
861 ////////////////////////////////////////////// <<
862 // <<
863 G4bool G4Transportation::GetSilenceLooperWarni <<
864 { <<
865 return fSilenceLooperWarnings; <<
866 } <<
867 <<
868 <<
869 ////////////////////////////////////////////// <<
870 // <<
871 void G4Transportation::SetHighLooperThresholds <<
872 { <<
873 // Restores the old high values -- potential <<
874 // HEP experiments. <<
875 // Caution: All tracks with E < 100 MeV tha <<
876 SetThresholdWarningEnergy( 100.0 * CLHEP: <<
877 SetThresholdImportantEnergy( 250.0 * CLHEP: <<
878 <<
879 G4int maxTrials = 10; <<
880 SetThresholdTrials( maxTrials ); <<
881 <<
882 PushThresholdsToLogger(); // Again, to be s <<
883 if( verboseLevel ) ReportLooperThresholds() <<
884 } <<
885 <<
886 ////////////////////////////////////////////// <<
887 void G4Transportation::SetLowLooperThresholds( <<
888 { <<
889 // These values were the default in Geant4 1 <<
890 SetThresholdWarningEnergy( 1.0 * CLHEP:: <<
891 SetThresholdImportantEnergy( 1.0 * CLHEP:: <<
892 <<
893 G4int maxTrials = 30; // A new value - was <<
894 SetThresholdTrials( maxTrials ); <<
895 <<
896 PushThresholdsToLogger(); // Again, to be s <<
897 if( verboseLevel ) ReportLooperThresholds() <<
898 } 734 }
899 735
900 ////////////////////////////////////////////// <<
901 // <<
902 void <<
903 G4Transportation::ReportMissingLogger( const c <<
904 { <<
905 const char* message= "Logger object missing <<
906 G4String classAndMethod= G4String("G4Transp <<
907 G4Exception(classAndMethod, "Missing Logger <<
908 } <<
909 <<
910 <<
911 ////////////////////////////////////////////// <<
912 // <<
913 void <<
914 G4Transportation::ReportLooperThresholds() <<
915 { <<
916 PushThresholdsToLogger(); // To be absolut <<
917 fpLogger->ReportLooperThresholds("G4Transpo <<
918 } <<
919 <<
920 ////////////////////////////////////////////// <<
921 // <<
922 void G4Transportation::ProcessDescription(std: <<
923 <<
924 // StreamInfo(std::ostream& out, const G4Parti <<
925 <<
926 { <<
927 G4String indent = " "; // : ""); <<
928 G4long oldPrec= outStr.precision(6); <<
929 // outStr << std::setprecision(6); <<
930 outStr << G4endl << indent << GetProcessName <<
931 <<
932 outStr << " Parameters for looping particl <<
933 << " warning-E = " << fThreshold_ <<
934 << " important E = " << fThreshol <<
935 << " thresholdTrials " << fThresh <<
936 outStr.precision(oldPrec); <<
937 } <<
938 736