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26 // 26 //
>> 27 // $Id: G4Transportation.cc 2011/06/10 16:19:46 japost Exp japost $
>> 28 // GEANT4 tag $Name: not supported by cvs2svn $
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 // 28 Oct 2011, P.Gumpl./J.Ap: Detect gravity field, use magnetic moment
>> 45 // 20 Nov 2008, J.Apostolakis: Push safety to helper - after ComputeSafety
>> 46 // 9 Nov 2007, J.Apostolakis: Flag for short steps, push safety to helper
>> 47 // 19 Jan 2006, P.MoraDeFreitas: Fix for suspended tracks (StartTracking)
>> 48 // 11 Aug 2004, M.Asai: Add G4VSensitiveDetector* for updating stepPoint.
>> 49 // 21 June 2003, J.Apostolakis: Calling field manager with
>> 50 // track, to enable it to configure its accuracy
>> 51 // 13 May 2003, J.Apostolakis: Zero field areas now taken into
>> 52 // account correclty in all cases (thanks to W Pokorski).
>> 53 // 29 June 2001, J.Apostolakis, D.Cote-Ahern, P.Gumplinger:
>> 54 // correction for spin tracking
>> 55 // 20 Febr 2001, J.Apostolakis: update for new FieldTrack
>> 56 // 22 Sept 2000, V.Grichine: update of Kinetic Energy
41 // Created: 19 March 1997, J. Apostolakis 57 // Created: 19 March 1997, J. Apostolakis
42 // =========================================== 58 // =======================================================================
43 59
44 #include "G4Transportation.hh" 60 #include "G4Transportation.hh"
45 #include "G4TransportationProcessType.hh" 61 #include "G4TransportationProcessType.hh"
46 #include "G4TransportationLogger.hh" <<
47 62
48 #include "G4PhysicalConstants.hh" 63 #include "G4PhysicalConstants.hh"
49 #include "G4SystemOfUnits.hh" 64 #include "G4SystemOfUnits.hh"
50 #include "G4ProductionCutsTable.hh" 65 #include "G4ProductionCutsTable.hh"
51 #include "G4ParticleTable.hh" 66 #include "G4ParticleTable.hh"
52 << 67 #include "G4ChordFinder.hh"
53 #include "G4ChargeState.hh" << 68 #include "G4SafetyHelper.hh"
54 #include "G4EquationOfMotion.hh" <<
55 <<
56 #include "G4FieldManagerStore.hh" 69 #include "G4FieldManagerStore.hh"
57 70
58 #include "G4Navigator.hh" <<
59 #include "G4PropagatorInField.hh" <<
60 #include "G4TransportationManager.hh" <<
61 <<
62 #include "G4TransportationParameters.hh" <<
63 <<
64 class G4VSensitiveDetector; 71 class G4VSensitiveDetector;
65 72
66 G4bool G4Transportation::fUseMagneticMoment=fa <<
67 G4bool G4Transportation::fUseGravity= false; <<
68 G4bool G4Transportation::fSilenceLooperWarning <<
69 <<
70 ////////////////////////////////////////////// 73 //////////////////////////////////////////////////////////////////////////
71 // 74 //
72 // Constructor 75 // Constructor
73 76
74 G4Transportation::G4Transportation( G4int verb << 77 G4Transportation::G4Transportation( G4int verbosity )
75 : G4VProcess( aName, fTransportation ), << 78 : G4VProcess( G4String("Transportation"), fTransportation ),
76 fFieldExertedForce( false ), << 79 fTransportEndPosition( 0.0, 0.0, 0.0 ),
>> 80 fTransportEndMomentumDir( 0.0, 0.0, 0.0 ),
>> 81 fTransportEndKineticEnergy( 0.0 ),
>> 82 fTransportEndSpin( 0.0, 0.0, 0.0 ),
>> 83 fMomentumChanged(true),
>> 84 fEnergyChanged(false),
>> 85 fEndGlobalTimeComputed(false),
>> 86 fCandidateEndGlobalTime(0.0),
>> 87 fParticleIsLooping( false ),
>> 88 fGeometryLimitedStep(true),
77 fPreviousSftOrigin( 0.,0.,0. ), 89 fPreviousSftOrigin( 0.,0.,0. ),
78 fPreviousSafety( 0.0 ), 90 fPreviousSafety( 0.0 ),
>> 91 // fParticleChange(),
79 fEndPointDistance( -1.0 ), 92 fEndPointDistance( -1.0 ),
80 fShortStepOptimisation( false ) // Old def << 93 fThreshold_Warning_Energy( 100 * MeV ),
>> 94 fThreshold_Important_Energy( 250 * MeV ),
>> 95 fThresholdTrials( 10 ),
>> 96 fUnimportant_Energy( 1 * MeV ), // Not used
>> 97 fNoLooperTrials( 0 ),
>> 98 fSumEnergyKilled( 0.0 ), fMaxEnergyKilled( 0.0 ),
>> 99 fShortStepOptimisation( false ), // Old default: true (=fast short steps)
>> 100 fUseMagneticMoment( false ),
>> 101 fVerboseLevel( verbosity )
81 { 102 {
82 SetProcessSubType(static_cast<G4int>(TRANSPO << 103 // set Process Sub Type
83 pParticleChange= &fParticleChange; // Requ << 104 SetProcessSubType(static_cast<int>(TRANSPORTATION));
84 SetVerboseLevel(verbosity); <<
85 105
86 G4TransportationManager* transportMgr ; 106 G4TransportationManager* transportMgr ;
87 107
88 transportMgr = G4TransportationManager::GetT 108 transportMgr = G4TransportationManager::GetTransportationManager() ;
89 109
90 fLinearNavigator = transportMgr->GetNavigato 110 fLinearNavigator = transportMgr->GetNavigatorForTracking() ;
91 111
92 fFieldPropagator = transportMgr->GetPropagat 112 fFieldPropagator = transportMgr->GetPropagatorInField() ;
93 113
94 fpSafetyHelper = transportMgr->GetSafetyHe 114 fpSafetyHelper = transportMgr->GetSafetyHelper(); // New
95 115
96 fpLogger = new G4TransportationLogger("G4Tra << 116 // Cannot determine whether a field exists here, as it would
>> 117 // depend on the relative order of creating the detector's
>> 118 // field and this process. That order is not guaranted.
>> 119 // Instead later the method DoesGlobalFieldExist() is called
97 120
98 if( G4TransportationParameters::Exists() ) << 121 static G4TouchableHandle nullTouchableHandle; // Points to (G4VTouchable*) 0
99 { << 122 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 } <<
111 123
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 <<
122 124
123 <<
124 #ifdef G4VERBOSE 125 #ifdef G4VERBOSE
125 if( verboseLevel > 0) << 126 if( fVerboseLevel > 0)
126 { 127 {
127 G4cout << " G4Transportation constructor> 128 G4cout << " G4Transportation constructor> set fShortStepOptimisation to ";
128 if ( fShortStepOptimisation ) { G4cout < << 129 if ( fShortStepOptimisation ) G4cout << "true" << G4endl;
129 else { G4cout < << 130 else G4cout << "false" << G4endl;
130 } 131 }
131 #endif 132 #endif
132 } 133 }
133 134
134 ////////////////////////////////////////////// 135 //////////////////////////////////////////////////////////////////////////
135 136
136 G4Transportation::~G4Transportation() 137 G4Transportation::~G4Transportation()
137 { 138 {
138 if( fSumEnergyKilled > 0.0 ) << 139 if( (fVerboseLevel > 0) && (fSumEnergyKilled > 0.0 ) ){
139 { << 140 G4cout << " G4Transportation: Statistics for looping particles " << G4endl;
140 PrintStatistics( G4cout ); << 141 G4cout << " Sum of energy of loopers killed: " << fSumEnergyKilled << G4endl;
141 } << 142 G4cout << " Max energy of loopers killed: " << fMaxEnergyKilled << G4endl;
142 delete fpLogger; << 143 }
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 } 144 }
182 145
183 ////////////////////////////////////////////// 146 //////////////////////////////////////////////////////////////////////////
184 // 147 //
185 // Responsibilities: 148 // Responsibilities:
186 // Find whether the geometry limits the Ste 149 // Find whether the geometry limits the Step, and to what length
187 // Calculate the new value of the safety an 150 // Calculate the new value of the safety and return it.
188 // Store the final time, position and momen 151 // Store the final time, position and momentum.
189 152
190 G4double G4Transportation::AlongStepGetPhysica << 153 G4double G4Transportation::
191 const G4Track& track, << 154 AlongStepGetPhysicalInteractionLength( const G4Track& track,
192 G4double, // previousStepSize << 155 G4double, // previousStepSize
193 G4double currentMinimumStep, G4double& curre << 156 G4double currentMinimumStep,
194 G4GPILSelection* selection) << 157 G4double& currentSafety,
>> 158 G4GPILSelection* selection )
195 { 159 {
196 // Initial actions moved to StartTrack() << 160 G4double geometryStepLength= -1.0, newSafety= -1.0;
>> 161 fParticleIsLooping = false ;
>> 162
>> 163 // Initial actions moved to StartTrack()
197 // -------------------------------------- 164 // --------------------------------------
198 // Note: in case another process changes tou 165 // Note: in case another process changes touchable handle
199 // it will be necessary to add here (for << 166 // it will be necessary to add here (for all steps)
200 // fCurrentTouchableHandle = aTrack->GetTouc 167 // fCurrentTouchableHandle = aTrack->GetTouchableHandle();
201 168
202 // GPILSelection is set to defaule value of 169 // GPILSelection is set to defaule value of CandidateForSelection
203 // It is a return value 170 // It is a return value
204 // 171 //
205 *selection = CandidateForSelection; << 172 *selection = CandidateForSelection ;
206 173
207 // Get initial Energy/Momentum of the track 174 // Get initial Energy/Momentum of the track
208 // 175 //
209 const G4ThreeVector startPosition = track << 176 const G4DynamicParticle* pParticle = track.GetDynamicParticle() ;
210 const G4ThreeVector startMomentumDir = track << 177 const G4ParticleDefinition* pParticleDef = pParticle->GetDefinition() ;
>> 178 G4ThreeVector startMomentumDir = pParticle->GetMomentumDirection() ;
>> 179 G4ThreeVector startPosition = track.GetPosition() ;
>> 180
>> 181 // G4double theTime = track.GetGlobalTime() ;
211 182
212 // The Step Point safety can be limited by o << 183 // The Step Point safety can be limited by other geometries and/or the
213 // assumptions of any process - it's not alw 184 // assumptions of any process - it's not always the geometrical safety.
214 // We calculate the starting point's isotrop 185 // We calculate the starting point's isotropic safety here.
>> 186 //
>> 187 G4ThreeVector OriginShift = startPosition - fPreviousSftOrigin ;
>> 188 G4double MagSqShift = OriginShift.mag2() ;
>> 189 if( MagSqShift >= sqr(fPreviousSafety) )
215 { 190 {
216 const G4double MagSqShift = (startPosition << 191 currentSafety = 0.0 ;
217 << 192 }
218 if(MagSqShift >= sqr(fPreviousSafety)) << 193 else
219 currentSafety = 0.0; << 194 {
220 else << 195 currentSafety = fPreviousSafety - std::sqrt(MagSqShift) ;
221 currentSafety = fPreviousSafety - std::s <<
222 } 196 }
223 197
224 // Is the particle charged or has it a magne 198 // Is the particle charged or has it a magnetic moment?
225 // 199 //
226 const G4DynamicParticle* pParticle = track.G << 200 G4double particleCharge = pParticle->GetCharge() ;
227 << 201 G4double magneticMoment = pParticle->GetMagneticMoment() ;
228 const G4double particleMass = pParticle->G << 202 G4double restMass = pParticleDef->GetPDGMass() ;
229 const G4double particleCharge = pParticle->G <<
230 const G4double kineticEnergy = pParticle->Ge <<
231 203
232 const G4double magneticMoment = pParticle << 204 fGeometryLimitedStep = false ;
233 const G4ThreeVector particleSpin = pParticle << 205 // fEndGlobalTimeComputed = false ;
234 206
235 // There is no need to locate the current vo 207 // There is no need to locate the current volume. It is Done elsewhere:
236 // On track construction << 208 // On track construction
237 // By the tracking, after all AlongStepDoI 209 // By the tracking, after all AlongStepDoIts, in "Relocation"
238 210
239 // Check if the particle has a force, EM or 211 // Check if the particle has a force, EM or gravitational, exerted on it
240 // 212 //
>> 213 G4FieldManager* fieldMgr=0;
>> 214 G4bool fieldExertsForce = false ;
241 215
242 G4bool eligibleEM = << 216 G4bool gravityOn = false;
243 (particleCharge != 0.0) || ((magneticMomen << 217 G4bool fieldExists= false; // Field is not 0 (null pointer)
244 G4bool eligibleGrav = (particleMass != 0.0) <<
245 218
246 fFieldExertedForce = false; << 219 fieldMgr = fFieldPropagator->FindAndSetFieldManager( track.GetVolume() );
247 << 220 if( fieldMgr != 0 )
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 { 221 {
270 fEndPointDistance = 0.0; << 222 // Message the field Manager, to configure it for this track
271 fGeometryLimitedStep = false; // Old cod << 223 fieldMgr->ConfigureForTrack( &track );
272 // Changed to avoid problems when setting << 224 // Is here to allow a transition from no-field pointer
273 fMomentumChanged = false; << 225 // to finite field (non-zero pointer).
274 fParticleIsLooping = false; << 226
275 fEndGlobalTimeComputed = false; << 227 // If the field manager has no field ptr, the field is zero
276 fTransportEndPosition = startPosition << 228 // by definition ( = there is no field ! )
277 fTransportEndMomentumDir = startMomentum << 229 const G4Field* ptrField= fieldMgr->GetDetectorField();
278 fTransportEndKineticEnergy = kineticEnergy << 230 fieldExists = (ptrField!=0) ;
279 fTransportEndSpin = particleSpin; << 231 if( fieldExists )
>> 232 {
>> 233 gravityOn= ptrField->IsGravityActive();
>> 234
>> 235 if( (particleCharge != 0.0)
>> 236 || (fUseMagneticMoment && (magneticMoment != 0.0) )
>> 237 || (gravityOn && (restMass != 0.0) )
>> 238 )
>> 239 {
>> 240 fieldExertsForce = fieldExists;
>> 241 }
>> 242 }
280 } 243 }
281 else if(!fFieldExertedForce) << 244 // G4cout << " G4Transport: field exerts force= " << fieldExertsForce
>> 245 // << " fieldMgr= " << fieldMgr << G4endl;
>> 246
>> 247 if( !fieldExertsForce )
282 { 248 {
283 fGeometryLimitedStep = false; << 249 G4double linearStepLength ;
284 if(geometryStepLength > currentSafety || ! << 250 if( fShortStepOptimisation && (currentMinimumStep <= currentSafety) )
285 { << 251 {
286 const G4double linearStepLength = fLinea << 252 // The Step is guaranteed to be taken
287 startPosition, startMomentumDir, curre << 253 //
288 << 254 geometryStepLength = currentMinimumStep ;
289 if(linearStepLength <= currentMinimumSte << 255 fGeometryLimitedStep = false ;
290 { << 256 }
291 geometryStepLength = linearStepLength; << 257 else
292 fGeometryLimitedStep = true; << 258 {
293 } << 259 // Find whether the straight path intersects a volume
294 // Remember last safety origin & value. << 260 //
295 // << 261 linearStepLength = fLinearNavigator->ComputeStep( startPosition,
296 fPreviousSftOrigin = startPosition; << 262 startMomentumDir,
297 fPreviousSafety = currentSafety; << 263 currentMinimumStep,
298 fpSafetyHelper->SetCurrentSafety(current << 264 newSafety) ;
299 } << 265 // Remember last safety origin & value.
300 << 266 //
301 fEndPointDistance = geometryStepLength; << 267 fPreviousSftOrigin = startPosition ;
>> 268 fPreviousSafety = newSafety ;
>> 269 fpSafetyHelper->SetCurrentSafety( newSafety, startPosition);
>> 270
>> 271 currentSafety = newSafety ;
>> 272
>> 273 fGeometryLimitedStep= (linearStepLength <= currentMinimumStep);
>> 274 if( fGeometryLimitedStep )
>> 275 {
>> 276 // The geometry limits the Step size (an intersection was found.)
>> 277 geometryStepLength = linearStepLength ;
>> 278 }
>> 279 else
>> 280 {
>> 281 // The full Step is taken.
>> 282 geometryStepLength = currentMinimumStep ;
>> 283 }
>> 284 }
>> 285 fEndPointDistance = geometryStepLength ;
302 286
303 fMomentumChanged = false; << 287 // Calculate final position
304 fParticleIsLooping = false; << 288 //
305 fEndGlobalTimeComputed = false; << 289 fTransportEndPosition = startPosition+geometryStepLength*startMomentumDir ;
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 <<
354 G4bool changesEnergy = <<
355 fFieldPropagator->GetCurrentFieldManager <<
356 290
357 fMomentumChanged = true; << 291 // Momentum direction, energy and polarisation are unchanged by transport
358 fParticleIsLooping = fFieldPropagator->IsP << 292 //
>> 293 fTransportEndMomentumDir = startMomentumDir ;
>> 294 fTransportEndKineticEnergy = track.GetKineticEnergy() ;
>> 295 fTransportEndSpin = track.GetPolarization();
>> 296 fParticleIsLooping = false ;
>> 297 fMomentumChanged = false ;
>> 298 fEndGlobalTimeComputed = false ;
>> 299 }
>> 300 else // A field exerts force
>> 301 {
>> 302 G4double momentumMagnitude = pParticle->GetTotalMomentum() ;
>> 303 G4ThreeVector EndUnitMomentum ;
>> 304 G4double lengthAlongCurve ;
>> 305
>> 306 fFieldPropagator->SetChargeMomentumMass( particleCharge, // in e+ units
>> 307 momentumMagnitude, // in Mev/c
>> 308 restMass ) ;
359 309
360 fEndGlobalTimeComputed = changesEnergy; << 310 G4ThreeVector spin = track.GetPolarization() ;
361 fTransportEndPosition = aFieldTrack.Get << 311 G4FieldTrack aFieldTrack = G4FieldTrack( startPosition,
362 fTransportEndMomentumDir = aFieldTrack.Get << 312 track.GetMomentumDirection(),
>> 313 0.0,
>> 314 track.GetKineticEnergy(),
>> 315 restMass,
>> 316 track.GetVelocity(),
>> 317 track.GetGlobalTime(), // Lab.
>> 318 track.GetProperTime(), // Part.
>> 319 &spin ) ;
>> 320 if( currentMinimumStep > 0 )
>> 321 {
>> 322 // Do the Transport in the field (non recti-linear)
>> 323 //
>> 324 lengthAlongCurve = fFieldPropagator->ComputeStep( aFieldTrack,
>> 325 currentMinimumStep,
>> 326 currentSafety,
>> 327 track.GetVolume() ) ;
>> 328 fGeometryLimitedStep= lengthAlongCurve < currentMinimumStep;
>> 329 if( fGeometryLimitedStep ) {
>> 330 geometryStepLength = lengthAlongCurve ;
>> 331 } else {
>> 332 geometryStepLength = currentMinimumStep ;
>> 333 }
363 334
364 // G4cout << " G4Transport: End of step pM << 335 // Remember last safety origin & value.
>> 336 //
>> 337 fPreviousSftOrigin = startPosition ;
>> 338 fPreviousSafety = currentSafety ;
>> 339 fpSafetyHelper->SetCurrentSafety( currentSafety, startPosition);
>> 340 }
>> 341 else
>> 342 {
>> 343 geometryStepLength = lengthAlongCurve= 0.0 ;
>> 344 fGeometryLimitedStep = false ;
>> 345 }
>> 346
>> 347 // Get the End-Position and End-Momentum (Dir-ection)
>> 348 //
>> 349 fTransportEndPosition = aFieldTrack.GetPosition() ;
365 350
366 fEndPointDistance = (fTransportEndPositio << 351 // Momentum: Magnitude and direction can be changed too now ...
>> 352 //
>> 353 fMomentumChanged = true ;
>> 354 fTransportEndMomentumDir = aFieldTrack.GetMomentumDir() ;
367 355
368 // Ignore change in energy for fields that << 356 fTransportEndKineticEnergy = aFieldTrack.GetKineticEnergy() ;
369 // This hides the integration error, but g <<
370 fTransportEndKineticEnergy = <<
371 changesEnergy ? aFieldTrack.GetKineticEn <<
372 fTransportEndSpin = aFieldTrack.GetSpin(); <<
373 357
374 if(fEndGlobalTimeComputed) << 358 if( fFieldPropagator->GetCurrentFieldManager()->DoesFieldChangeEnergy() )
375 { << 359 {
376 // If the field can change energy, then << 360 // If the field can change energy, then the time must be integrated
377 // - so this should have been updated << 361 // - so this should have been updated
378 // << 362 //
379 fCandidateEndGlobalTime = aFieldTrack.Ge << 363 fCandidateEndGlobalTime = aFieldTrack.GetLabTimeOfFlight();
>> 364 fEndGlobalTimeComputed = true;
380 365
381 // was ( fCandidateEndGlobalTime != trac << 366 // was ( fCandidateEndGlobalTime != track.GetGlobalTime() );
382 // a cleaner way is to have FieldTrack k << 367 // a cleaner way is to have FieldTrack knowing whether time is updated.
383 } << 368 }
384 #if defined(G4VERBOSE) || defined(G4DEBUG_TRAN << 369 else
385 else << 370 {
386 { << 371 // The energy should be unchanged by field transport,
387 // The energy should be unchanged by fie << 372 // - so the time changed will be calculated elsewhere
388 // - so the time changed will be calc << 373 //
389 // << 374 fEndGlobalTimeComputed = false;
390 // Check that the integration preserved <<
391 // - and if not correct this! <<
392 G4double startEnergy = kineticEnergy; <<
393 G4double endEnergy = fTransportEndKine <<
394 375
395 static G4ThreadLocal G4int no_large_edif << 376 // Check that the integration preserved the energy
396 if(verboseLevel > 1) << 377 // - and if not correct this!
397 { << 378 G4double startEnergy= track.GetKineticEnergy();
398 if(std::fabs(startEnergy - endEnergy) << 379 G4double endEnergy= fTransportEndKineticEnergy;
>> 380
>> 381 static G4int no_inexact_steps=0, no_large_ediff;
>> 382 G4double absEdiff = std::fabs(startEnergy- endEnergy);
>> 383 if( absEdiff > perMillion * endEnergy )
>> 384 {
>> 385 no_inexact_steps++;
>> 386 // Possible statistics keeping here ...
>> 387 }
>> 388 if( fVerboseLevel > 1 )
399 { 389 {
400 static G4ThreadLocal G4int no_warnin << 390 if( std::fabs(startEnergy- endEnergy) > perThousand * endEnergy )
401 moduloFac <<
402 no_large_ediff++; <<
403 if((no_large_ediff % warnModulo) == <<
404 { 391 {
405 no_warnings++; << 392 static G4int no_warnings= 0, warnModulo=1, moduloFactor= 10;
406 std::ostringstream message; << 393 no_large_ediff ++;
407 message << "Energy change in Step << 394 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 { 395 {
435 warnModulo *= moduloFactor; << 396 no_warnings++;
>> 397 G4cout << "WARNING - G4Transportation::AlongStepGetPIL() "
>> 398 << " Energy change in Step is above 1^-3 relative value. " << G4endl
>> 399 << " Relative change in 'tracking' step = "
>> 400 << std::setw(15) << (endEnergy-startEnergy)/startEnergy << G4endl
>> 401 << " Starting E= " << std::setw(12) << startEnergy / MeV << " MeV " << G4endl
>> 402 << " Ending E= " << std::setw(12) << endEnergy / MeV << " MeV " << G4endl;
>> 403 G4cout << " Energy has been corrected -- however, review"
>> 404 << " field propagation parameters for accuracy." << G4endl;
>> 405 if( (fVerboseLevel > 2 ) || (no_warnings<4) || (no_large_ediff == warnModulo * moduloFactor) ){
>> 406 G4cout << " These include EpsilonStepMax(/Min) in G4FieldManager "
>> 407 << " which determine fractional error per step for integrated quantities. " << G4endl
>> 408 << " Note also the influence of the permitted number of integration steps."
>> 409 << G4endl;
>> 410 }
>> 411 G4cerr << "ERROR - G4Transportation::AlongStepGetPIL()" << G4endl
>> 412 << " Bad 'endpoint'. Energy change detected"
>> 413 << " and corrected. "
>> 414 << " Has occurred already "
>> 415 << no_large_ediff << " times." << G4endl;
>> 416 if( no_large_ediff == warnModulo * moduloFactor )
>> 417 {
>> 418 warnModulo *= moduloFactor;
>> 419 }
436 } 420 }
437 } 421 }
438 } << 422 } // end of if (fVerboseLevel)
439 } // end of if (verboseLevel) << 423
440 } << 424 // Correct the energy for fields that conserve it
441 #endif << 425 // This - hides the integration error
>> 426 // - but gives a better physical answer
>> 427 fTransportEndKineticEnergy= track.GetKineticEnergy();
>> 428 }
>> 429
>> 430 fTransportEndSpin = aFieldTrack.GetSpin();
>> 431 fParticleIsLooping = fFieldPropagator->IsParticleLooping() ;
>> 432 fEndPointDistance = (fTransportEndPosition - startPosition).mag() ;
>> 433 }
>> 434
>> 435 // If we are asked to go a step length of 0, and we are on a boundary
>> 436 // then a boundary will also limit the step -> we must flag this.
>> 437 //
>> 438 if( currentMinimumStep == 0.0 )
>> 439 {
>> 440 if( currentSafety == 0.0 ) fGeometryLimitedStep = true ;
442 } 441 }
443 442
444 // Update the safety starting from the end-p 443 // Update the safety starting from the end-point,
445 // if it will become negative at the end-poi 444 // if it will become negative at the end-point.
446 // 445 //
447 if(currentSafety < fEndPointDistance) << 446 if( currentSafety < fEndPointDistance )
448 { 447 {
449 if(particleCharge != 0.0) << 448 if( particleCharge != 0.0 )
450 { << 449 {
451 G4double endSafety = << 450 G4double endSafety =
452 fLinearNavigator->ComputeSafety(fTrans << 451 fLinearNavigator->ComputeSafety( fTransportEndPosition) ;
453 currentSafety = endSafety; << 452 currentSafety = endSafety ;
454 fPreviousSftOrigin = fTransportEndPositi << 453 fPreviousSftOrigin = fTransportEndPosition ;
455 fPreviousSafety = currentSafety; << 454 fPreviousSafety = currentSafety ;
456 fpSafetyHelper->SetCurrentSafety(current << 455 fpSafetyHelper->SetCurrentSafety( currentSafety, fTransportEndPosition);
457 << 456
458 // Because the Stepping Manager assumes << 457 // Because the Stepping Manager assumes it is from the start point,
459 // add the StepLength << 458 // add the StepLength
460 // << 459 //
461 currentSafety += fEndPointDistance; << 460 currentSafety += fEndPointDistance ;
462 << 461
463 #ifdef G4DEBUG_TRANSPORT << 462 #ifdef G4DEBUG_TRANSPORT
464 G4cout.precision(12); << 463 G4cout.precision(12) ;
465 G4cout << "***G4Transportation::AlongSte << 464 G4cout << "***G4Transportation::AlongStepGPIL ** " << G4endl ;
466 G4cout << " Called Navigator->ComputeSa << 465 G4cout << " Called Navigator->ComputeSafety at " << fTransportEndPosition
467 << " and it returned safety= << 466 << " and it returned safety= " << endSafety << G4endl ;
468 G4cout << " Adding endpoint distance << 467 G4cout << " Adding endpoint distance " << fEndPointDistance
469 << " to obtain pseudo-safety= << 468 << " to obtain pseudo-safety= " << currentSafety << G4endl ;
470 } << 469 }else{
471 else << 470 G4cout << "***G4Transportation::AlongStepGPIL ** " << G4endl ;
472 { << 471 G4cout << " Avoiding call to ComputeSafety : " << G4endl;
473 G4cout << "***G4Transportation::AlongSte << 472 G4cout << " charge = " << particleCharge << G4endl;
474 G4cout << " Avoiding call to ComputeSaf << 473 G4cout << " mag moment = " << magneticMoment << G4endl;
475 G4cout << " charge = " << particl <<
476 G4cout << " mag moment = " << magneti <<
477 #endif 474 #endif
478 } << 475 }
479 } << 476 }
480 <<
481 fFirstStepInVolume = fNewTrack || fLastStepI <<
482 fLastStepInVolume = false; <<
483 fNewTrack = false; <<
484 477
485 fParticleChange.ProposeFirstStepInVolume(fFi << 478 fParticleChange.ProposeTrueStepLength(geometryStepLength) ;
486 fParticleChange.ProposeTrueStepLength(geomet <<
487 479
488 return geometryStepLength; << 480 return geometryStepLength ;
489 } 481 }
490 482
491 ////////////////////////////////////////////// 483 //////////////////////////////////////////////////////////////////////////
492 // 484 //
493 // Initialize ParticleChange (by setting al 485 // Initialize ParticleChange (by setting all its members equal
494 // to correspond 486 // to corresponding members in G4Track)
495 487
496 G4VParticleChange* G4Transportation::AlongStep 488 G4VParticleChange* G4Transportation::AlongStepDoIt( const G4Track& track,
497 489 const G4Step& stepData )
498 { 490 {
499 #if defined(G4VERBOSE) || defined(G4DEBUG_TRAN << 491 static G4int noCalls=0;
500 static G4ThreadLocal G4long noCallsASDI=0; << 492 noCalls++;
501 noCallsASDI++; <<
502 #else <<
503 #define noCallsASDI 0 <<
504 #endif <<
505 <<
506 if(fGeometryLimitedStep) <<
507 { <<
508 stepData.GetPostStepPoint()->SetStepStatus <<
509 } <<
510 493
511 fParticleChange.Initialize(track) ; 494 fParticleChange.Initialize(track) ;
512 495
513 // Code for specific process 496 // Code for specific process
514 // 497 //
515 fParticleChange.ProposePosition(fTransportEn 498 fParticleChange.ProposePosition(fTransportEndPosition) ;
516 fParticleChange.ProposeMomentumDirection(fTr 499 fParticleChange.ProposeMomentumDirection(fTransportEndMomentumDir) ;
517 fParticleChange.ProposeEnergy(fTransportEndK 500 fParticleChange.ProposeEnergy(fTransportEndKineticEnergy) ;
518 fParticleChange.SetMomentumChanged(fMomentum 501 fParticleChange.SetMomentumChanged(fMomentumChanged) ;
519 502
520 fParticleChange.ProposePolarization(fTranspo 503 fParticleChange.ProposePolarization(fTransportEndSpin);
521 << 504
522 G4double deltaTime = 0.0 ; 505 G4double deltaTime = 0.0 ;
523 506
524 // Calculate Lab Time of Flight (ONLY if fi 507 // Calculate Lab Time of Flight (ONLY if field Equations used it!)
525 // G4double endTime = fCandidateEndGlobalT 508 // G4double endTime = fCandidateEndGlobalTime;
526 // G4double delta_time = endTime - startTime 509 // G4double delta_time = endTime - startTime;
527 510
528 G4double startTime = track.GetGlobalTime() ; 511 G4double startTime = track.GetGlobalTime() ;
529 512
530 if (!fEndGlobalTimeComputed) 513 if (!fEndGlobalTimeComputed)
531 { 514 {
532 // The time was not integrated .. make th 515 // The time was not integrated .. make the best estimate possible
533 // 516 //
534 G4double initialVelocity = stepData.GetPr 517 G4double initialVelocity = stepData.GetPreStepPoint()->GetVelocity();
535 G4double stepLength = track.GetStepL 518 G4double stepLength = track.GetStepLength();
536 519
537 deltaTime= 0.0; // in case initialVeloci 520 deltaTime= 0.0; // in case initialVelocity = 0
538 if ( initialVelocity > 0.0 ) { deltaTime << 521 if ( initialVelocity > 0.0 ) deltaTime = stepLength/initialVelocity ;
539 522
540 fCandidateEndGlobalTime = startTime + d 523 fCandidateEndGlobalTime = startTime + deltaTime ;
541 fParticleChange.ProposeLocalTime( track. 524 fParticleChange.ProposeLocalTime( track.GetLocalTime() + deltaTime) ;
542 } 525 }
543 else 526 else
544 { 527 {
545 deltaTime = fCandidateEndGlobalTime - sta 528 deltaTime = fCandidateEndGlobalTime - startTime ;
546 fParticleChange.ProposeGlobalTime( fCandi 529 fParticleChange.ProposeGlobalTime( fCandidateEndGlobalTime ) ;
547 } 530 }
548 531
549 532
550 // Now Correct by Lorentz factor to get delt 533 // Now Correct by Lorentz factor to get delta "proper" Time
551 534
552 G4double restMass = track.GetDynamicP 535 G4double restMass = track.GetDynamicParticle()->GetMass() ;
553 G4double deltaProperTime = deltaTime*( restM 536 G4double deltaProperTime = deltaTime*( restMass/track.GetTotalEnergy() ) ;
554 537
555 fParticleChange.ProposeProperTime(track.GetP 538 fParticleChange.ProposeProperTime(track.GetProperTime() + deltaProperTime) ;
556 //fParticleChange.ProposeTrueStepLength( tra << 539 //fParticleChange. ProposeTrueStepLength( track.GetStepLength() ) ;
557 540
558 // If the particle is caught looping or is s 541 // If the particle is caught looping or is stuck (in very difficult
559 // boundaries) in a magnetic field (doing ma << 542 // boundaries) in a magnetic field (doing many steps)
>> 543 // THEN this kills it ...
560 // 544 //
561 if ( fParticleIsLooping ) 545 if ( fParticleIsLooping )
562 { 546 {
563 G4double endEnergy= fTransportEndKinetic 547 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 } <<
602 548
603 if( endEnergy > fThreshold_Warning_Ene << 549 if( (endEnergy < fThreshold_Important_Energy)
604 { << 550 || (fNoLooperTrials >= fThresholdTrials ) ){
605 fpLogger->ReportLoopingTrack( track, << 551 // Kill the looping particle
606 noCall << 552 //
607 } << 553 fParticleChange.ProposeTrackStatus( fStopAndKill ) ;
608 fNoLooperTrials=0; << 554
>> 555 // 'Bare' statistics
>> 556 fSumEnergyKilled += endEnergy;
>> 557 if( endEnergy > fMaxEnergyKilled) { fMaxEnergyKilled= endEnergy; }
>> 558
>> 559 #ifdef G4VERBOSE
>> 560 if( (fVerboseLevel > 1) &&
>> 561 ( endEnergy > fThreshold_Warning_Energy ) ) {
>> 562 G4cout << " G4Transportation is killing track that is looping or stuck "
>> 563 << G4endl
>> 564 << " This track has " << track.GetKineticEnergy() / MeV
>> 565 << " MeV energy." << G4endl;
>> 566 G4cout << " Number of trials = " << fNoLooperTrials
>> 567 << " No of calls to AlongStepDoIt = " << noCalls
>> 568 << G4endl;
>> 569 }
>> 570 #endif
>> 571 fNoLooperTrials=0;
609 } 572 }
610 else << 573 else{
611 { << 574 fNoLooperTrials ++;
612 fMaxEnergySaved = std::max( endEnergy, <<
613 if( fNoLooperTrials == 1 ) { <<
614 fSumEnergySaved += endEnergy; <<
615 if ( !stable ) <<
616 fSumEnergyUnstableSaved += endEne <<
617 } <<
618 #ifdef G4VERBOSE 575 #ifdef G4VERBOSE
619 if( verboseLevel > 2 && ! fSilenceLoop << 576 if( (fVerboseLevel > 2) ){
620 { << 577 G4cout << " G4Transportation::AlongStepDoIt(): Particle looping - "
621 G4cout << " " << __func__ << 578 << " Number of trials = " << fNoLooperTrials
622 << " Particle is looping but << 579 << " No of calls to = " << noCalls
623 << " Number of trials = " < << 580 << G4endl;
624 << " No of calls to = " << << 581 }
625 } <<
626 #endif 582 #endif
627 } 583 }
628 } << 584 }else{
629 else <<
630 { <<
631 fNoLooperTrials=0; 585 fNoLooperTrials=0;
632 } 586 }
633 587
634 // Another (sometimes better way) is to use 588 // Another (sometimes better way) is to use a user-limit maximum Step size
635 // to alleviate this problem .. 589 // to alleviate this problem ..
636 590
637 // Introduce smooth curved trajectories to p 591 // Introduce smooth curved trajectories to particle-change
638 // 592 //
639 fParticleChange.SetPointerToVectorOfAuxiliar 593 fParticleChange.SetPointerToVectorOfAuxiliaryPoints
640 (fFieldPropagator->GimmeTrajectoryVectorAn 594 (fFieldPropagator->GimmeTrajectoryVectorAndForgetIt() );
641 595
642 return &fParticleChange ; 596 return &fParticleChange ;
643 } 597 }
644 598
645 ////////////////////////////////////////////// 599 //////////////////////////////////////////////////////////////////////////
646 // 600 //
647 // This ensures that the PostStep action is a 601 // This ensures that the PostStep action is always called,
648 // so that it can do the relocation if it is 602 // so that it can do the relocation if it is needed.
649 // 603 //
650 604
651 G4double G4Transportation:: 605 G4double G4Transportation::
652 PostStepGetPhysicalInteractionLength( const G4 606 PostStepGetPhysicalInteractionLength( const G4Track&,
653 G4 607 G4double, // previousStepSize
654 G4 608 G4ForceCondition* pForceCond )
655 { << 609 {
656 fFieldExertedForce = false; // Not known <<
657 *pForceCond = Forced ; 610 *pForceCond = Forced ;
658 return DBL_MAX ; // was kInfinity ; but con 611 return DBL_MAX ; // was kInfinity ; but convention now is DBL_MAX
659 } 612 }
660 613
661 ////////////////////////////////////////////// 614 /////////////////////////////////////////////////////////////////////////////
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 // 615 //
707 616
708 G4VParticleChange* G4Transportation::PostStepD 617 G4VParticleChange* G4Transportation::PostStepDoIt( const G4Track& track,
709 618 const G4Step& )
710 { 619 {
711 G4TouchableHandle retCurrentTouchable ; / 620 G4TouchableHandle retCurrentTouchable ; // The one to return
712 G4bool isLastStep= false; 621 G4bool isLastStep= false;
713 622
714 // Initialize ParticleChange (by setting al 623 // Initialize ParticleChange (by setting all its members equal
715 // to correspond 624 // to corresponding members in G4Track)
716 // fParticleChange.Initialize(track) ; // T 625 // fParticleChange.Initialize(track) ; // To initialise TouchableChange
717 626
718 fParticleChange.ProposeTrackStatus(track.Get 627 fParticleChange.ProposeTrackStatus(track.GetTrackStatus()) ;
719 628
720 // If the Step was determined by the volume 629 // If the Step was determined by the volume boundary,
721 // logically relocate the particle 630 // logically relocate the particle
722 631
723 if(fGeometryLimitedStep) 632 if(fGeometryLimitedStep)
724 { 633 {
725 // fCurrentTouchable will now become the p 634 // fCurrentTouchable will now become the previous touchable,
726 // and what was the previous will be freed 635 // and what was the previous will be freed.
727 // (Needed because the preStepPoint can po 636 // (Needed because the preStepPoint can point to the previous touchable)
728 637
729 fLinearNavigator->SetGeometricallyLimitedS 638 fLinearNavigator->SetGeometricallyLimitedStep() ;
730 fLinearNavigator-> 639 fLinearNavigator->
731 LocateGlobalPointAndUpdateTouchableHandle( 640 LocateGlobalPointAndUpdateTouchableHandle( track.GetPosition(),
732 641 track.GetMomentumDirection(),
733 642 fCurrentTouchableHandle,
734 643 true ) ;
735 // Check whether the particle is out of th 644 // Check whether the particle is out of the world volume
736 // If so it has exited and must be killed. 645 // If so it has exited and must be killed.
737 // 646 //
738 if( fCurrentTouchableHandle->GetVolume() = 647 if( fCurrentTouchableHandle->GetVolume() == 0 )
739 { 648 {
740 fParticleChange.ProposeTrackStatus( fSt 649 fParticleChange.ProposeTrackStatus( fStopAndKill ) ;
741 } 650 }
742 retCurrentTouchable = fCurrentTouchableHan 651 retCurrentTouchable = fCurrentTouchableHandle ;
743 fParticleChange.SetTouchableHandle( fCurre 652 fParticleChange.SetTouchableHandle( fCurrentTouchableHandle ) ;
744 653
745 // Update the Step flag which identifies t 654 // Update the Step flag which identifies the Last Step in a volume
746 if( !fFieldExertedForce ) << 655 isLastStep = fLinearNavigator->ExitedMotherVolume()
747 isLastStep = fLinearNavigator->ExitedM << 656 | fLinearNavigator->EnteredDaughterVolume() ;
748 || fLinearNavigator->Entered << 657
749 else << 658 #ifdef G4DEBUG_TRANSPORT
750 isLastStep = fFieldPropagator->IsLastSt << 659 // Checking first implementation of flagging Last Step in Volume
>> 660 G4bool exiting = fLinearNavigator->ExitedMotherVolume();
>> 661 G4bool entering = fLinearNavigator->EnteredDaughterVolume();
>> 662 if( ! (exiting || entering) ) {
>> 663 G4cout << " Transport> : Proposed isLastStep= " << isLastStep
>> 664 << " Exiting " << fLinearNavigator->ExitedMotherVolume()
>> 665 << " Entering " << fLinearNavigator->EnteredDaughterVolume()
>> 666 << G4endl;
>> 667 }
>> 668 #endif
751 } 669 }
752 else // fGeometryLimitedStep 670 else // fGeometryLimitedStep is false
753 { 671 {
754 // This serves only to move the Navigator' 672 // This serves only to move the Navigator's location
755 // 673 //
756 fLinearNavigator->LocateGlobalPointWithinV 674 fLinearNavigator->LocateGlobalPointWithinVolume( track.GetPosition() ) ;
757 675
758 // The value of the track's current Toucha 676 // The value of the track's current Touchable is retained.
759 // (and it must be correct because we must 677 // (and it must be correct because we must use it below to
760 // overwrite the (unset) one in particle c 678 // overwrite the (unset) one in particle change)
761 // It must be fCurrentTouchable too ?? 679 // It must be fCurrentTouchable too ??
762 // 680 //
763 fParticleChange.SetTouchableHandle( track. 681 fParticleChange.SetTouchableHandle( track.GetTouchableHandle() ) ;
764 retCurrentTouchable = track.GetTouchableHa 682 retCurrentTouchable = track.GetTouchableHandle() ;
765 683
766 isLastStep= false; 684 isLastStep= false;
>> 685 #ifdef G4DEBUG_TRANSPORT
>> 686 // Checking first implementation of flagging Last Step in Volume
>> 687 G4cout << " Transport> Proposed isLastStep= " << isLastStep
>> 688 << " Geometry did not limit step. " << G4endl;
>> 689 #endif
767 } // endif ( fGeometryLimitedStep ) 690 } // endif ( fGeometryLimitedStep )
768 fLastStepInVolume= isLastStep; << 691
769 <<
770 fParticleChange.ProposeFirstStepInVolume(fFi <<
771 fParticleChange.ProposeLastStepInVolume(isLa 692 fParticleChange.ProposeLastStepInVolume(isLastStep);
772 693
773 SetTouchableInformation(retCurrentTouchable) << 694 const G4VPhysicalVolume* pNewVol = retCurrentTouchable->GetVolume() ;
>> 695 const G4Material* pNewMaterial = 0 ;
>> 696 const G4VSensitiveDetector* pNewSensitiveDetector = 0 ;
>> 697
>> 698 if( pNewVol != 0 )
>> 699 {
>> 700 pNewMaterial= pNewVol->GetLogicalVolume()->GetMaterial();
>> 701 pNewSensitiveDetector= pNewVol->GetLogicalVolume()->GetSensitiveDetector();
>> 702 }
>> 703
>> 704 // ( <const_cast> pNewMaterial ) ;
>> 705 // ( <const_cast> pNewSensitiveDetector) ;
>> 706
>> 707 fParticleChange.SetMaterialInTouchable( (G4Material *) pNewMaterial ) ;
>> 708 fParticleChange.SetSensitiveDetectorInTouchable( (G4VSensitiveDetector *) pNewSensitiveDetector ) ;
>> 709
>> 710 const G4MaterialCutsCouple* pNewMaterialCutsCouple = 0;
>> 711 if( pNewVol != 0 )
>> 712 {
>> 713 pNewMaterialCutsCouple=pNewVol->GetLogicalVolume()->GetMaterialCutsCouple();
>> 714 }
>> 715
>> 716 if( pNewVol!=0 && pNewMaterialCutsCouple!=0 && pNewMaterialCutsCouple->GetMaterial()!=pNewMaterial )
>> 717 {
>> 718 // for parametrized volume
>> 719 //
>> 720 pNewMaterialCutsCouple =
>> 721 G4ProductionCutsTable::GetProductionCutsTable()
>> 722 ->GetMaterialCutsCouple(pNewMaterial,
>> 723 pNewMaterialCutsCouple->GetProductionCuts());
>> 724 }
>> 725 fParticleChange.SetMaterialCutsCoupleInTouchable( pNewMaterialCutsCouple );
>> 726
>> 727 // temporarily until Get/Set Material of ParticleChange,
>> 728 // and StepPoint can be made const.
>> 729 // Set the touchable in ParticleChange
>> 730 // this must always be done because the particle change always
>> 731 // uses this value to overwrite the current touchable pointer.
>> 732 //
>> 733 fParticleChange.SetTouchableHandle(retCurrentTouchable) ;
774 734
775 return &fParticleChange ; 735 return &fParticleChange ;
776 } 736 }
777 737
778 ////////////////////////////////////////////// << 738 // New method takes over the responsibility to reset the state of G4Transportation
779 // New method takes over the responsibility to << 739 // 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 // <<
783 740
784 void 741 void
785 G4Transportation::StartTracking(G4Track* aTrac 742 G4Transportation::StartTracking(G4Track* aTrack)
786 { 743 {
787 G4VProcess::StartTracking(aTrack); 744 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 <<
794 745
795 // Whether field exists should be determined << 746 // The actions here are those that were taken in AlongStepGPIL
796 G4FieldManagerStore* fieldMgrStore= G4FieldM << 747 // when track.GetCurrentStepNumber()==1
797 fAnyFieldExists = fieldMgrStore->size() > 0; << 748
798 <<
799 // reset safety value and center 749 // reset safety value and center
800 // 750 //
801 fPreviousSafety = 0.0 ; 751 fPreviousSafety = 0.0 ;
802 fPreviousSftOrigin = G4ThreeVector(0.,0.,0.) 752 fPreviousSftOrigin = G4ThreeVector(0.,0.,0.) ;
803 753
804 // reset looping counter -- for motion in fi 754 // reset looping counter -- for motion in field
805 fNoLooperTrials= 0; 755 fNoLooperTrials= 0;
806 // Must clear this state .. else it depends 756 // Must clear this state .. else it depends on last track's value
807 // --> a better solution would set this fro 757 // --> a better solution would set this from state of suspended track TODO ?
808 // Was if( aTrack->GetCurrentStepNumber()==1 758 // Was if( aTrack->GetCurrentStepNumber()==1 ) { .. }
809 759
810 // ChordFinder reset internal state 760 // ChordFinder reset internal state
811 // 761 //
812 if( fFieldPropagator && fAnyFieldExists ) << 762 if( DoesGlobalFieldExist() ) {
813 { <<
814 fFieldPropagator->ClearPropagatorState(); 763 fFieldPropagator->ClearPropagatorState();
815 // Resets all state of field propagator << 764 // Resets all state of field propagator class (ONLY)
816 // values (in case of overlaps and to w << 765 // including safety values (in case of overlaps and to wipe for first track).
>> 766
>> 767 // G4ChordFinder* chordF= fFieldPropagator->GetChordFinder();
>> 768 // if( chordF ) chordF->ResetStepEstimate();
817 } 769 }
818 770
819 // Make sure to clear the chord finders of a << 771 // Make sure to clear the chord finders of all fields (ie managers)
820 // << 772 static G4FieldManagerStore* fieldMgrStore= G4FieldManagerStore::GetInstance();
821 fieldMgrStore->ClearAllChordFindersState(); 773 fieldMgrStore->ClearAllChordFindersState();
822 774
823 // Update the current touchable handle (fro 775 // Update the current touchable handle (from the track's)
824 // 776 //
825 fCurrentTouchableHandle = aTrack->GetTouchab 777 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 } 778 }
899 779
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 } <<
938 780