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25 // 22 //
26 // class G4PropagatorInField Implementation << 23 //
>> 24 // $Id: G4PropagatorInField.cc,v 1.20 2004/12/02 09:31:23 gcosmo Exp $
>> 25 // GEANT4 tag $Name: geant4-08-00 $
>> 26 //
27 // 27 //
28 // This class implements an algorithm to trac 28 // This class implements an algorithm to track a particle in a
29 // non-uniform magnetic field. It utilises an 29 // non-uniform magnetic field. It utilises an ODE solver (with
30 // the Runge - Kutta method) to evolve the pa 30 // the Runge - Kutta method) to evolve the particle, and drives it
31 // until the particle has traveled a set dist 31 // until the particle has traveled a set distance or it enters a new
32 // volume. 32 // volume.
33 // 33 //
34 // 14.10.96 John Apostolakis, design and imple << 34 // 14.10.96 John Apostolakis, design and implementation
35 // 17.03.97 John Apostolakis, renaming new set << 35 // 17.03.97 John Apostolakis, renaming new set functions being added
>> 36 //
36 // ------------------------------------------- 37 // ---------------------------------------------------------------------------
37 38
38 #include <iomanip> <<
39 <<
40 #include "G4PropagatorInField.hh" 39 #include "G4PropagatorInField.hh"
41 #include "G4ios.hh" 40 #include "G4ios.hh"
42 #include "G4SystemOfUnits.hh" << 41 #include <iomanip>
>> 42
43 #include "G4ThreeVector.hh" 43 #include "G4ThreeVector.hh"
44 #include "G4Material.hh" <<
45 #include "G4VPhysicalVolume.hh" 44 #include "G4VPhysicalVolume.hh"
46 #include "G4Navigator.hh" 45 #include "G4Navigator.hh"
47 #include "G4GeometryTolerance.hh" <<
48 #include "G4VCurvedTrajectoryFilter.hh" 46 #include "G4VCurvedTrajectoryFilter.hh"
49 #include "G4ChordFinder.hh" 47 #include "G4ChordFinder.hh"
50 #include "G4MultiLevelLocator.hh" <<
51 <<
52 48
53 // ------------------------------------------- << 49 ///////////////////////////////////////////////////////////////////////////
54 // Constructors and destructor <<
55 // 50 //
56 G4PropagatorInField::G4PropagatorInField( G4Na << 51 // Constructors and destructor
57 G4Fi << 52
58 G4VI << 53 G4PropagatorInField::G4PropagatorInField( G4Navigator *theNavigator,
>> 54 G4FieldManager *detectorFieldMgr )
59 : fDetectorFieldMgr(detectorFieldMgr), 55 : fDetectorFieldMgr(detectorFieldMgr),
>> 56 fCurrentFieldMgr(detectorFieldMgr),
60 fNavigator(theNavigator), 57 fNavigator(theNavigator),
61 fCurrentFieldMgr(detectorFieldMgr), <<
62 End_PointAndTangent(G4ThreeVector(0.,0.,0. 58 End_PointAndTangent(G4ThreeVector(0.,0.,0.),
63 G4ThreeVector(0.,0.,0. << 59 G4ThreeVector(0.,0.,0.),0.0,0.0,0.0,0.0,0.0),
>> 60 fParticleIsLooping(false),
>> 61 fVerboseLevel(0),
>> 62 fMax_loop_count(1000),
>> 63 fNoZeroStep(0),
>> 64 fCharge(0.0), fInitialMomentumModulus(0.0), fMass(0.0),
>> 65 fUseSafetyForOptimisation(true), // (false) is less sensitive to incorrect safety
>> 66 fSetFieldMgr(false),
>> 67 fpTrajectoryFilter( 0 )
64 { 68 {
65 fEpsilonStep = (fDetectorFieldMgr != nullptr << 69 if(fDetectorFieldMgr) { fEpsilonStep = fDetectorFieldMgr->GetMaximumEpsilonStep();}
66 ? fDetectorFieldMgr->GetMaximum << 70 else { fEpsilonStep= 1.0e-5; }
67 << 71 fActionThreshold_NoZeroSteps = 2;
68 << 72 fSevereActionThreshold_NoZeroSteps = 10;
69 fPreviousSftOrigin = G4ThreeVector(0.,0.,0.) << 73 fAbandonThreshold_NoZeroSteps = 50;
70 kCarTolerance = G4GeometryTolerance::GetInst << 74 fFull_CurveLen_of_LastAttempt = -1;
71 fZeroStepThreshold = std::max( 1.0e5 * kCarT << 75 fLast_ProposedStepLength = -1;
72 << 76 fLargestAcceptableStep = 1000.0 * meter;
73 fLargestAcceptableStep = 100.0 * meter; // <<
74 fMaxStepSizeMultiplier= 0.1 ; // 0.1 in <<
75 fMinBigDistance= 100. * CLHEP::mm; <<
76 #ifdef G4DEBUG_FIELD <<
77 G4cout << " PiF: Zero Step Threshold set to <<
78 << fZeroStepThreshold / millimeter <<
79 << " mm." << G4endl; <<
80 G4cout << " PiF: Value of kCarTolerance = <<
81 << kCarTolerance / millimeter <<
82 << " mm. " << G4endl; <<
83 fVerboseLevel = 2; <<
84 fVerbTracePiF = true; <<
85 #endif <<
86 77
87 // Defining Intersection Locator and his par << 78 fPreviousSftOrigin= G4ThreeVector(0.,0.,0.);
88 if ( vLocator == nullptr ) << 79 fPreviousSafety= 0.0;
89 { <<
90 fIntersectionLocator = new G4MultiLevelLoc <<
91 fAllocatedLocator = true; <<
92 } <<
93 else <<
94 { <<
95 fIntersectionLocator = vLocator; <<
96 fAllocatedLocator = false; <<
97 } <<
98 RefreshIntersectionLocator(); // Copy all <<
99 } 80 }
100 81
101 // ------------------------------------------- <<
102 // <<
103 G4PropagatorInField::~G4PropagatorInField() 82 G4PropagatorInField::~G4PropagatorInField()
104 { 83 {
105 if(fAllocatedLocator) { delete fIntersecti <<
106 } 84 }
107 85
108 // ------------------------------------------- << 86 ///////////////////////////////////////////////////////////////////////////
109 // Update the IntersectionLocator with current <<
110 // 87 //
111 void G4PropagatorInField::RefreshIntersectionL <<
112 { <<
113 fIntersectionLocator->SetEpsilonStepFor(fEps <<
114 fIntersectionLocator->SetDeltaIntersectionFo <<
115 fIntersectionLocator->SetChordFinderFor(GetC <<
116 fIntersectionLocator->SetSafetyParametersFor <<
117 } <<
118 <<
119 // ------------------------------------------- <<
120 // Compute the next geometric Step 88 // Compute the next geometric Step
121 // << 89
122 G4double G4PropagatorInField::ComputeStep( << 90 G4double
>> 91 G4PropagatorInField::ComputeStep(
123 G4FieldTrack& pFieldTrack 92 G4FieldTrack& pFieldTrack,
124 G4double CurrentProp 93 G4double CurrentProposedStepLength,
125 G4double& currentSafe 94 G4double& currentSafety, // IN/OUT
126 G4VPhysicalVolume* pPhysVol, << 95 G4VPhysicalVolume* pPhysVol)
127 G4bool canRelaxDel << 96 {
128 { <<
129 GetChordFinder()->OnComputeStep(&pFieldTrack <<
130 const G4double deltaChord = GetChordFinder() <<
131 <<
132 // If CurrentProposedStepLength is too small 97 // If CurrentProposedStepLength is too small for finding Chords
133 // then return with no action (for now - TOD << 98 // just forget.
134 // << 99 if(CurrentProposedStepLength<kCarTolerance) return DBL_MAX;
135 const char* methodName = "G4PropagatorInFiel <<
136 if (CurrentProposedStepLength<kCarTolerance) <<
137 { <<
138 return kInfinity; <<
139 } <<
140 100
141 // Introducing smooth trajectory display (ja 101 // Introducing smooth trajectory display (jacek 01/11/2002)
142 // << 102 if (fpTrajectoryFilter) {
143 if (fpTrajectoryFilter != nullptr) <<
144 { <<
145 fpTrajectoryFilter->CreateNewTrajectorySeg 103 fpTrajectoryFilter->CreateNewTrajectorySegment();
146 } 104 }
147 105
148 fFirstStepInVolume = fNewTrack ? true : fLas <<
149 fLastStepInVolume = false; <<
150 fNewTrack = false; <<
151 <<
152 if( fVerboseLevel > 2 ) <<
153 { <<
154 G4cout << methodName << " called" << G4end <<
155 G4cout << " Starting FT: " << pFieldTrac <<
156 G4cout << " Requested length = " << Curr <<
157 G4cout << " PhysVol = "; <<
158 if( pPhysVol != nullptr ) <<
159 { <<
160 G4cout << pPhysVol->GetName() << G4endl <<
161 } <<
162 else <<
163 { <<
164 G4cout << " N/A "; <<
165 } <<
166 G4cout << G4endl; <<
167 } <<
168 <<
169 // Parameters for adaptive Runge-Kutta integ 106 // Parameters for adaptive Runge-Kutta integration
170 107
171 G4double h_TrialStepSize; // 1st Step << 108 G4double h_TrialStepSize; // 1st Step Size
172 G4double TruePathLength = CurrentProposedSte << 109 G4double TruePathLength = CurrentProposedStepLength;
173 G4double StepTaken = 0.0; << 110 G4double StepTaken = 0.0;
174 G4double s_length_taken, epsilon; << 111 G4double s_length_taken, epsilon ;
175 G4bool intersects; << 112 G4bool intersects;
176 G4bool first_substep = true; << 113 G4bool first_substep = true;
177 114
178 G4double NewSafety; << 115 G4double NewSafety;
179 fParticleIsLooping = false; 116 fParticleIsLooping = false;
180 117
181 // If not yet done, 118 // If not yet done,
182 // Set the field manager to the local one 119 // Set the field manager to the local one if the volume has one,
183 // or to the global one 120 // or to the global one if not
184 // 121 //
185 if( !fSetFieldMgr ) << 122 if( !fSetFieldMgr ) fCurrentFieldMgr= FindAndSetFieldManager( pPhysVol );
186 { << 123 // For the next call, the field manager must again be set
187 fCurrentFieldMgr = FindAndSetFieldManager( << 124 fSetFieldMgr= false;
188 } <<
189 fSetFieldMgr = false; // For next call, the <<
190 125
191 G4FieldTrack CurrentState(pFieldTrack); << 126 GetChordFinder()->SetChargeMomentumMass(fCharge, fInitialMomentumModulus, fMass);
192 G4FieldTrack OriginalState = CurrentState; << 127
>> 128 G4FieldTrack CurrentState(pFieldTrack);
>> 129 G4FieldTrack OriginalState = CurrentState;
193 130
194 // If the Step length is "infinite", then an 131 // If the Step length is "infinite", then an approximate-maximum Step
195 // length (used to calculate the relative ac << 132 // length (used to calculate the relative accuracy) must be guessed.
196 // 133 //
197 if( CurrentProposedStepLength >= fLargestAcc 134 if( CurrentProposedStepLength >= fLargestAcceptableStep )
198 { 135 {
199 G4ThreeVector StartPointA, VelocityUnit; 136 G4ThreeVector StartPointA, VelocityUnit;
200 StartPointA = pFieldTrack.GetPosition(); 137 StartPointA = pFieldTrack.GetPosition();
201 VelocityUnit = pFieldTrack.GetMomentumDir( 138 VelocityUnit = pFieldTrack.GetMomentumDir();
202 139
203 G4double trialProposedStep = fMaxStepSizeM << 140 G4double trialProposedStep = 1.e2 * ( 10.0 * cm +
204 fNavigator->GetWorldVolume()->GetLogical 141 fNavigator->GetWorldVolume()->GetLogicalVolume()->
205 GetSolid()->DistanceToOut(St 142 GetSolid()->DistanceToOut(StartPointA, VelocityUnit) );
206 CurrentProposedStepLength = std::min( tria << 143 CurrentProposedStepLength= std::min( trialProposedStep,
207 fLar << 144 fLargestAcceptableStep );
208 } 145 }
209 epsilon = fCurrentFieldMgr->GetDeltaOneStep( << 146 epsilon = GetDeltaOneStep() / CurrentProposedStepLength;
>> 147 // G4double raw_epsilon= epsilon;
210 G4double epsilonMin= fCurrentFieldMgr->GetMi 148 G4double epsilonMin= fCurrentFieldMgr->GetMinimumEpsilonStep();
211 G4double epsilonMax= fCurrentFieldMgr->GetMa << 149 G4double epsilonMax= fCurrentFieldMgr->GetMaximumEpsilonStep();;
212 if( epsilon < epsilonMin ) { epsilon = epsi << 150 if( epsilon < epsilonMin ) epsilon = epsilonMin;
213 if( epsilon > epsilonMax ) { epsilon = epsi << 151 if( epsilon > epsilonMax ) epsilon = epsilonMax;
214 SetEpsilonStep( epsilon ); 152 SetEpsilonStep( epsilon );
215 153
216 // Values for Intersection Locator has to be << 154 // G4cout << "G4PiF: Epsilon of current step - raw= " << raw_epsilon
217 // case that CurrentFieldManager has changed << 155 // << " final= " << epsilon << G4endl;
218 // <<
219 RefreshIntersectionLocator(); <<
220 156
221 // Shorten the proposed step in case of earl << 157 // Shorten the proposed step in case of earlier problems (zero steps)
222 // 158 //
223 if( fNoZeroStep > fActionThreshold_NoZeroSte 159 if( fNoZeroStep > fActionThreshold_NoZeroSteps )
224 { 160 {
225 G4double stepTrial; 161 G4double stepTrial;
226 162
227 stepTrial = fFull_CurveLen_of_LastAttempt; << 163 stepTrial= fFull_CurveLen_of_LastAttempt;
228 if( (stepTrial <= 0.0) && (fLast_ProposedS << 164 if( (stepTrial <= 0.0) && (fLast_ProposedStepLength > 0.0) )
229 { << 165 stepTrial= fLast_ProposedStepLength;
230 stepTrial = fLast_ProposedStepLength; <<
231 } <<
232 166
233 G4double decreaseFactor = 0.9; // Unused d 167 G4double decreaseFactor = 0.9; // Unused default
234 if( (fNoZeroStep < fSevereActionThreshol 168 if( (fNoZeroStep < fSevereActionThreshold_NoZeroSteps)
235 && (stepTrial > 100.0*fZeroStepThreshol << 169 && (stepTrial > 1000.0*kCarTolerance) )
236 { 170 {
237 // Attempt quick convergence << 171 // Ensure quicker convergence
238 // 172 //
239 decreaseFactor= 0.25; << 173 decreaseFactor= 0.1;
240 } 174 }
241 else 175 else
242 { 176 {
243 // We are in significant difficulties, p 177 // We are in significant difficulties, probably at a boundary that
244 // is either geometrically sharp or betw 178 // is either geometrically sharp or between very different materials.
245 // Careful decreases to cope with tolera << 179 // Careful decreases to cope with tolerance are required.
246 // 180 //
247 if( stepTrial > 100.0*fZeroStepThreshold << 181 if( stepTrial > 1000.0*kCarTolerance )
248 decreaseFactor = 0.35; // Try decr << 182 decreaseFactor = 0.25; // Try slow decreases
249 } else if( stepTrial > 30.0*fZeroStepThr << 183 else if( stepTrial > 100.0*kCarTolerance )
250 decreaseFactor= 0.5; // Try yet << 184 decreaseFactor= 0.5; // Try slower decreases
251 } else if( stepTrial > 10.0*fZeroStepThr << 185 else if( stepTrial > 10.0*kCarTolerance )
252 decreaseFactor= 0.75; // Try even 186 decreaseFactor= 0.75; // Try even slower decreases
253 } else { << 187 else
254 decreaseFactor= 0.9; // Try very 188 decreaseFactor= 0.9; // Try very slow decreases
255 } <<
256 } 189 }
257 stepTrial *= decreaseFactor; 190 stepTrial *= decreaseFactor;
258 191
259 #ifdef G4DEBUG_FIELD 192 #ifdef G4DEBUG_FIELD
260 if( fVerboseLevel > 2 << 193 PrintStepLengthDiagnostic(CurrentProposedStepLength, decreaseFactor,
261 || (fNoZeroStep >= fSevereActionThreshol << 194 stepTrial, pFieldTrack);
262 { <<
263 G4cerr << " " << methodName <<
264 << " Decreasing step after " < <<
265 << " - in volume " << pPhysVol; <<
266 if( pPhysVol ) <<
267 G4cerr << " with name " << pPhysVol <<
268 else <<
269 G4cerr << " i.e. *unknown* volume." <<
270 G4cerr << G4endl; <<
271 PrintStepLengthDiagnostic(CurrentPropo <<
272 stepTrial, p <<
273 } <<
274 #endif 195 #endif
275 if( stepTrial == 0.0 ) // Change to mak << 196 if( stepTrial == 0.0 )
276 { 197 {
277 std::ostringstream message; << 198 G4cout << " G4PropagatorInField::ComputeStep "
278 message << "Particle abandoned due to l << 199 << " Particle abandoned due to lack of progress in field."
279 << G4endl << 200 << G4endl
280 << " Properties : " << pFieldT << 201 << " Properties : " << pFieldTrack << " "
281 << " Attempting a zero step = << 202 << G4endl;
282 << " while attempting to progr << 203 G4cerr << " G4PropagatorInField::ComputeStep "
283 << " trial steps. Will abandon << 204 << " ERROR : attempting a zero step= " << stepTrial << G4endl
284 G4Exception(methodName, "GeomNav1002", << 205 << " while attempting to progress after " << fNoZeroStep
285 fParticleIsLooping = true; << 206 << " trial steps. Will abandon step." << G4endl;
286 return 0; // = stepTrial; << 207 fParticleIsLooping= true;
>> 208 return 0; // = stepTrial;
287 } 209 }
288 if( stepTrial < CurrentProposedStepLength 210 if( stepTrial < CurrentProposedStepLength )
289 { <<
290 CurrentProposedStepLength = stepTrial; 211 CurrentProposedStepLength = stepTrial;
291 } <<
292 } 212 }
293 fLast_ProposedStepLength = CurrentProposedSt 213 fLast_ProposedStepLength = CurrentProposedStepLength;
294 214
295 G4int do_loop_count = 0; 215 G4int do_loop_count = 0;
296 do // Loop checking, 07.10.2016, JA << 216 do
297 { 217 {
298 G4FieldTrack SubStepStartState = CurrentSt 218 G4FieldTrack SubStepStartState = CurrentState;
299 G4ThreeVector SubStartPoint = CurrentState 219 G4ThreeVector SubStartPoint = CurrentState.GetPosition();
300 << 220
301 if(!first_substep) << 221 if( !first_substep) {
302 { <<
303 if( fVerboseLevel > 4 ) <<
304 { <<
305 G4cout << " PiF: Calling Nav/Locate Gl <<
306 << G4endl; <<
307 } <<
308 fNavigator->LocateGlobalPointWithinVolum 222 fNavigator->LocateGlobalPointWithinVolume( SubStartPoint );
309 } 223 }
310 224
311 // How far to attempt to move the particle 225 // How far to attempt to move the particle !
312 // 226 //
313 h_TrialStepSize = CurrentProposedStepLengt 227 h_TrialStepSize = CurrentProposedStepLength - StepTaken;
314 228
315 if (canRelaxDeltaChord && <<
316 fIncreaseChordDistanceThreshold > 0 & <<
317 do_loop_count > fIncreaseChordDistance <<
318 do_loop_count % fIncreaseChordDistance <<
319 { <<
320 GetChordFinder()->SetDeltaChord( <<
321 GetChordFinder()->GetDeltaChord() * <<
322 ); <<
323 } <<
324 <<
325 // Integrate as far as "chord miss" rule a 229 // Integrate as far as "chord miss" rule allows.
326 // 230 //
327 s_length_taken = GetChordFinder()->Advance 231 s_length_taken = GetChordFinder()->AdvanceChordLimited(
328 CurrentState, 232 CurrentState, // Position & velocity
329 h_TrialStepSize, 233 h_TrialStepSize,
330 fEpsilonStep, 234 fEpsilonStep,
331 fPreviousSftOrigi 235 fPreviousSftOrigin,
332 fPreviousSafety ) << 236 fPreviousSafety
333 // CurrentState is now updated with the << 237 );
>> 238 // CurrentState is now updated with the final position and velocity.
334 239
335 fFull_CurveLen_of_LastAttempt = s_length_t 240 fFull_CurveLen_of_LastAttempt = s_length_taken;
336 241
337 G4ThreeVector EndPointB = CurrentState.Get << 242 G4ThreeVector EndPointB = CurrentState.GetPosition();
338 G4ThreeVector InterSectionPointE; << 243 G4ThreeVector InterSectionPointE;
339 G4double LinearStepLength; << 244 G4double LinearStepLength;
340 245
341 // Intersect chord AB with geometry 246 // Intersect chord AB with geometry
342 // <<
343 intersects= IntersectChord( SubStartPoint, 247 intersects= IntersectChord( SubStartPoint, EndPointB,
344 NewSafety, Lin << 248 NewSafety, LinearStepLength,
345 InterSectionPo << 249 InterSectionPointE );
346 // E <- Intersection Point of chord AB a << 250 // E <- Intersection Point of chord AB and either volume A's surface
347 // or a << 251 // or a daughter volume's surface ..
348 252
349 if( first_substep ) << 253 if( first_substep ) {
350 { <<
351 currentSafety = NewSafety; 254 currentSafety = NewSafety;
352 } // Updating safety in other steps is pot 255 } // Updating safety in other steps is potential future extention
353 256
354 if( intersects ) 257 if( intersects )
355 { 258 {
356 G4FieldTrack IntersectPointVelct_G(Curr 259 G4FieldTrack IntersectPointVelct_G(CurrentState); // FT-Def-Construct
357 260
358 // Find the intersection point of AB tr 261 // Find the intersection point of AB true path with the surface
359 // of vol(A), if it exists. Start wit 262 // of vol(A), if it exists. Start with point E as first "estimate".
360 G4bool recalculatedEndPt = false; << 263 G4bool recalculatedEndPt= false;
361 << 264 G4bool found_intersection =
362 G4bool found_intersection = fIntersecti << 265 LocateIntersectionPoint( SubStepStartState, CurrentState,
363 EstimateIntersectionPoint( SubStepSta << 266 InterSectionPointE, IntersectPointVelct_G,
364 InterSecti << 267 recalculatedEndPt);
365 recalculat << 268 intersects = intersects && found_intersection;
366 fPreviousS << 269 if( found_intersection ) {
367 intersects = found_intersection; <<
368 if( found_intersection ) <<
369 { <<
370 End_PointAndTangent= IntersectPointV 270 End_PointAndTangent= IntersectPointVelct_G; // G is our EndPoint ...
371 StepTaken = TruePathLength = Interse 271 StepTaken = TruePathLength = IntersectPointVelct_G.GetCurveLength()
372 - Origina << 272 - OriginalState.GetCurveLength();
373 } << 273 } else {
374 else << 274 // intersects= false; // "Minor" chords do not intersect
375 { << 275 if( recalculatedEndPt ){
376 // Either "minor" chords do not inte << 276 CurrentState= IntersectPointVelct_G;
377 // or else stopped (due to too many << 277 }
378 // <<
379 if( recalculatedEndPt ) <<
380 { <<
381 G4double endAchieved = IntersectP <<
382 G4double endExpected = CurrentSta <<
383 <<
384 // Detect failure - due to too ma <<
385 G4bool shortEnd = endAchieved <<
386 < (endExpected*(1 <<
387 <<
388 G4double stepAchieved = endAchiev <<
389 - SubStepSt <<
390 <<
391 // Update remaining state - must <<
392 // abandonned intersection <<
393 // <<
394 CurrentState = IntersectPointVelc <<
395 s_length_taken = stepAchieved; <<
396 if( shortEnd ) <<
397 { <<
398 fParticleIsLooping = true; <<
399 } <<
400 } <<
401 } 278 }
402 } 279 }
403 if( !intersects ) 280 if( !intersects )
404 { 281 {
405 StepTaken += s_length_taken; << 282 StepTaken += s_length_taken;
406 << 283 // For smooth trajectory display (jacek 01/11/2002)
407 if (fpTrajectoryFilter != nullptr) // Fo << 284 if (fpTrajectoryFilter) {
408 { <<
409 fpTrajectoryFilter->TakeIntermediatePo 285 fpTrajectoryFilter->TakeIntermediatePoint(CurrentState.GetPosition());
410 } 286 }
411 } 287 }
412 first_substep = false; 288 first_substep = false;
413 289
414 #ifdef G4DEBUG_FIELD 290 #ifdef G4DEBUG_FIELD
415 if( fNoZeroStep > fActionThreshold_NoZeroS << 291 if( fNoZeroStep > fActionThreshold_NoZeroSteps ) {
416 { <<
417 if( fNoZeroStep > fSevereActionThreshold <<
418 G4cout << " Above 'Severe Action' thre <<
419 else <<
420 G4cout << " Above 'action' threshold - <<
421 G4cout << " Number of zero steps = " << <<
422 printStatus( SubStepStartState, // or O 292 printStatus( SubStepStartState, // or OriginalState,
423 CurrentState, CurrentPropos << 293 CurrentState, CurrentProposedStepLength,
424 NewSafety, do_loop_count, p << 294 NewSafety, do_loop_count, pPhysVol );
425 } 295 }
426 if( (fVerboseLevel > 1) && (do_loop_count << 296 #endif
427 { << 297 #ifdef G4VERBOSE
428 if( do_loop_count == fMax_loop_count-9 ) << 298 if( (fVerboseLevel > 1) && (do_loop_count > fMax_loop_count-10 )) {
429 { << 299 if( do_loop_count == fMax_loop_count-9 ){
430 G4cout << " G4PropagatorInField::Compu << 300 G4cout << "G4PropagatorInField::ComputeStep "
431 << " Difficult track - taking << 301 << " Difficult track - taking many sub steps." << G4endl;
432 printStatus( SubStepStartState, SubSte <<
433 NewSafety, 0, pPhysVol ); <<
434 } 302 }
435 printStatus( SubStepStartState, CurrentS 303 printStatus( SubStepStartState, CurrentState, CurrentProposedStepLength,
436 NewSafety, do_loop_count, p << 304 NewSafety, do_loop_count, pPhysVol );
437 } 305 }
438 #endif 306 #endif
439 307
440 ++do_loop_count; << 308 do_loop_count++;
441 309
442 } while( (!intersects ) 310 } while( (!intersects )
443 && (!fParticleIsLooping) <<
444 && (StepTaken + kCarTolerance < Curren 311 && (StepTaken + kCarTolerance < CurrentProposedStepLength)
445 && ( do_loop_count < fMax_loop_count ) 312 && ( do_loop_count < fMax_loop_count ) );
446 313
447 if( do_loop_count >= fMax_loop_count << 314 if( do_loop_count >= fMax_loop_count )
448 && (StepTaken + kCarTolerance < CurrentPro <<
449 { 315 {
450 fParticleIsLooping = true; 316 fParticleIsLooping = true;
>> 317
>> 318 if ( fVerboseLevel > 0 ){
>> 319 G4cout << "G4PropagateInField: Killing looping particle "
>> 320 // << " of " << energy << " energy "
>> 321 << " after " << do_loop_count << " field substeps "
>> 322 << " totaling " << StepTaken / mm << " mm " ;
>> 323 if( pPhysVol )
>> 324 G4cout << " in the volume " << pPhysVol->GetName() ;
>> 325 else
>> 326 G4cout << " in unknown or null volume. " ;
>> 327 G4cout << G4endl;
>> 328 }
451 } 329 }
452 if ( ( fParticleIsLooping ) && (fVerboseLeve << 330
453 { <<
454 ReportLoopingParticle( do_loop_count, Step <<
455 CurrentProposedStep <<
456 CurrentState.GetMom <<
457 } <<
458 <<
459 if( !intersects ) 331 if( !intersects )
460 { 332 {
461 // Chord AB or "minor chords" do not inter 333 // Chord AB or "minor chords" do not intersect
462 // B is the endpoint Step of the current S 334 // B is the endpoint Step of the current Step.
463 // 335 //
464 End_PointAndTangent = CurrentState; 336 End_PointAndTangent = CurrentState;
465 TruePathLength = StepTaken; // Original << 337 TruePathLength = StepTaken;
466 <<
467 // Tried the following to avoid potential <<
468 // - but has issues... Suppressing this ch <<
469 // TruePathLength = CurrentProposedStepLen <<
470 } 338 }
471 fLastStepInVolume = intersects; <<
472 339
473 // Set pFieldTrack to the return value 340 // Set pFieldTrack to the return value
474 // 341 //
475 pFieldTrack = End_PointAndTangent; 342 pFieldTrack = End_PointAndTangent;
476 343
477 #ifdef G4VERBOSE 344 #ifdef G4VERBOSE
478 // Check that "s" is correct 345 // Check that "s" is correct
479 // 346 //
480 if( std::fabs(OriginalState.GetCurveLength() 347 if( std::fabs(OriginalState.GetCurveLength() + TruePathLength
481 - End_PointAndTangent.GetCurveLength()) 348 - End_PointAndTangent.GetCurveLength()) > 3.e-4 * TruePathLength )
482 { 349 {
483 std::ostringstream message; << 350 G4cerr << " ERROR - G4PropagatorInField::ComputeStep():" << G4endl
484 message << "Curve length mis-match between << 351 << " Curve length mis-match, is advancement wrong ? " << G4endl;
485 << "and proposed endpoint of propa << 352 G4cerr << " The curve length of the endpoint should be: "
486 << " The curve length of the endp << 353 << OriginalState.GetCurveLength() + TruePathLength << G4endl
487 << OriginalState.GetCurveLength() << 354 << " and it is instead: "
488 << " and it is instead: " << 355 << End_PointAndTangent.GetCurveLength() << "." << G4endl
489 << End_PointAndTangent.GetCurveLen << 356 << " A difference of: "
490 << " A difference of: " << 357 << OriginalState.GetCurveLength() + TruePathLength
491 << OriginalState.GetCurveLength() << 358 - End_PointAndTangent.GetCurveLength() << G4endl;
492 - End_PointAndTangent.GetCurveL << 359 G4cerr << " Original state= " << OriginalState << G4endl
493 << " Original state = " << Origin << 360 << " Proposed state= " << End_PointAndTangent << G4endl;
494 << " Proposed state = " << End_Po << 361 G4Exception("G4PropagatorInField::ComputeStep()", "IncorrectProposedEndPoint",
495 G4Exception(methodName, "GeomNav0003", Fat << 362 FatalException,
>> 363 "Curve length mis-match between original state and proposed endpoint of propagation.");
496 } 364 }
497 #endif 365 #endif
498 366
499 if( TruePathLength+kCarTolerance >= CurrentP << 367 #ifdef G4DEBUG_FIELD
500 { << 368 // static G4std::vector<G4int> ZeroStepNumberHist(fAbandonThreshold+1);
501 fNoZeroStep = 0; << 369 if( fNoZeroStep ){
502 } << 370 // ZeroStepNumberHist[fNoZeroStep]++;
503 else << 371 if( fNoZeroStep > fActionThreshold_NoZeroSteps ){
504 { << 372 G4cout << " PiF: Step returning=" << StepTaken << G4endl;
505 // In particular anomalous cases, we can << 373 G4cout << " ------------------------------------------------------- "
506 // We identify these cases and take corre << 374 << G4endl;
507 // <<
508 if( TruePathLength < std::max( fZeroStepT <<
509 { <<
510 ++fNoZeroStep; <<
511 } <<
512 else <<
513 { <<
514 fNoZeroStep = 0; <<
515 } 375 }
516 } 376 }
517 if( fNoZeroStep > fAbandonThreshold_NoZeroSt << 377 #endif
518 { << 378
>> 379 // In particular anomalous cases, we can get repeated zero steps
>> 380 // In order to correct this efficiently, we identify these cases
>> 381 // and only take corrective action when they occur.
>> 382 //
>> 383 if( TruePathLength < 0.5*kCarTolerance )
>> 384 fNoZeroStep++;
>> 385 else
>> 386 fNoZeroStep = 0;
>> 387
>> 388 if( fNoZeroStep > fAbandonThreshold_NoZeroSteps ) {
519 fParticleIsLooping = true; 389 fParticleIsLooping = true;
520 ReportStuckParticle( fNoZeroStep, Current << 390 G4cout << " WARNING - G4PropagatorInField::ComputeStep():" << G4endl
521 fFull_CurveLen_of_La << 391 << " Zero progress for " << fNoZeroStep << " attempted steps."
>> 392 << G4endl;
>> 393 #ifdef G4VERBOSE
>> 394 if ( fVerboseLevel > 2 )
>> 395 G4cout << " Particle that is stuck will be killed." << G4endl;
>> 396 #endif
522 fNoZeroStep = 0; 397 fNoZeroStep = 0;
523 } 398 }
524 << 399
525 GetChordFinder()->SetDeltaChord(deltaChord); << 400 #ifdef G4VERBOSE
>> 401 if ( fVerboseLevel > 3 ){
>> 402 G4cout << "G4PropagatorInField returns " << TruePathLength << G4endl;
>> 403 }
>> 404 #endif
>> 405
526 return TruePathLength; 406 return TruePathLength;
527 } 407 }
528 408
529 // ------------------------------------------- << 409 // --------------------------------------------------------------------------
530 // Dumps status of propagator << 410 // G4bool
>> 411 // G4PropagatorInField::LocateIntersectionPoint(
>> 412 // const G4FieldTrack& CurveStartPointVelocity, // A
>> 413 // const G4FieldTrack& CurveEndPointVelocity, // B
>> 414 // const G4ThreeVector& TrialPoint, // E
>> 415 // G4FieldTrack& IntersectedOrRecalculated // Output
>> 416 // G4bool& recalculated) // Out
>> 417 // --------------------------------------------------------------------------
>> 418 //
>> 419 // Function that returns the intersection of the true path with the surface
>> 420 // of the current volume (either the external one or the inner one with one
>> 421 // of the daughters
>> 422 //
>> 423 // A = Initial point
>> 424 // B = another point
>> 425 //
>> 426 // Both A and B are assumed to be on the true path.
>> 427 //
>> 428 // E is the first point of intersection of the chord AB with
>> 429 // a volume other than A (on the surface of A or of a daughter)
>> 430 //
>> 431 // Convention of Use :
>> 432 // i) If it returns "true", then IntersectionPointVelocity is set
>> 433 // to the approximate intersection point.
>> 434 // ii) If it returns "false", no intersection was found.
>> 435 // The validity of IntersectedOrRecalculated depends on 'recalculated'
>> 436 // a) if latter is false, then IntersectedOrRecalculated is invalid.
>> 437 // b) if latter is true, then IntersectedOrRecalculated is
>> 438 // the new endpoint, due to a re-integration.
>> 439 // --------------------------------------------------------------------------
>> 440
>> 441 G4bool
>> 442 G4PropagatorInField::LocateIntersectionPoint(
>> 443 const G4FieldTrack& CurveStartPointVelocity, // A
>> 444 const G4FieldTrack& CurveEndPointVelocity, // B
>> 445 const G4ThreeVector& TrialPoint, // E
>> 446 G4FieldTrack& IntersectedOrRecalculatedFT, // Out: point found
>> 447 G4bool& recalculatedEndPoint) // Out:
>> 448 {
>> 449 // Find Intersection Point ( A, B, E ) of true path AB - start at E.
>> 450
>> 451 G4bool found_approximate_intersection = false;
>> 452 G4bool there_is_no_intersection = false;
>> 453
>> 454 G4FieldTrack CurrentA_PointVelocity = CurveStartPointVelocity;
>> 455 G4FieldTrack CurrentB_PointVelocity = CurveEndPointVelocity;
>> 456 G4ThreeVector CurrentE_Point = TrialPoint;
>> 457
>> 458 G4FieldTrack ApproxIntersecPointV(CurveEndPointVelocity); // FT-Def-Construct
>> 459 G4double NewSafety= -0.0;
>> 460 G4bool final_section= true; // Shows whether current section is last (ie B=full end)
>> 461
>> 462 recalculatedEndPoint= false;
>> 463
>> 464 G4bool restoredFullEndpoint= false;
>> 465
>> 466 G4int substep_no = 0;
>> 467 const G4int max_substeps= 100;
>> 468
>> 469 do{ // REPEAT
>> 470
>> 471 G4ThreeVector Point_A = CurrentA_PointVelocity.GetPosition();
>> 472 G4ThreeVector Point_B = CurrentB_PointVelocity.GetPosition();
>> 473
>> 474 // F = a point on true AB path close to point E (the closest if possible)
>> 475 //
>> 476 ApproxIntersecPointV =
>> 477 GetChordFinder()->ApproxCurvePointV( CurrentA_PointVelocity,
>> 478 CurrentB_PointVelocity,
>> 479 CurrentE_Point,
>> 480 fEpsilonStep );
>> 481 // The above method is the key & most intuitive part ...
>> 482
>> 483 #ifdef G4DEBUG_FIELD
>> 484 if( ApproxIntersecPointV.GetCurveLength() >
>> 485 CurrentB_PointVelocity.GetCurveLength() * (1.0 + kAngTolerance) ) {
>> 486 G4cerr << "Error - Intermediate F point is more advanced than endpoint B."
>> 487 << G4endl;
>> 488 G4Exception("G4PropagatorInField::LocateIntersectionPoint()",
>> 489 "IntermediatePointConfusion",
>> 490 FatalException, "Intermediate F point is past end B point" );
>> 491 }
>> 492 #endif
>> 493
>> 494 G4ThreeVector CurrentF_Point= ApproxIntersecPointV.GetPosition();
>> 495
>> 496 // First check whether EF is small - then F is a good approx. point
>> 497 // Calculate the length and direction of the chord AF
>> 498 //
>> 499 G4ThreeVector ChordEF_Vector = CurrentF_Point - CurrentE_Point;
>> 500
>> 501 if ( ChordEF_Vector.mag2() <= sqr(GetDeltaIntersection()) )
>> 502 {
>> 503 found_approximate_intersection = true;
>> 504
>> 505 // Create the "point" return value
>> 506 //
>> 507 IntersectedOrRecalculatedFT = ApproxIntersecPointV;
>> 508 IntersectedOrRecalculatedFT.SetPosition( CurrentE_Point );
>> 509
>> 510 // Note: in order to return a point on the boundary,
>> 511 // we must return E. But it is F on the curve.
>> 512 // So we must "cheat": we are using the position at point E
>> 513 // and the velocity at point F !!!
>> 514 //
>> 515 // This must limit the length we can allow for displacement!
>> 516
>> 517 }
>> 518 else // E is NOT close enough to the curve (ie point F)
>> 519 {
>> 520 // Check whether any volumes are encountered by the chord AF
>> 521 // ---------------------------------------------------------
>> 522 // First relocate to restore any Voxel etc information in the Navigator
>> 523 // before calling ComputeStep
>> 524 fNavigator->LocateGlobalPointWithinVolume( Point_A );
>> 525
>> 526 G4ThreeVector PointG; // Candidate intersection point
>> 527 G4double stepLengthAF;
>> 528 G4bool Intersects_AF = IntersectChord( Point_A, CurrentF_Point,
>> 529 NewSafety, stepLengthAF,
>> 530 PointG
>> 531 );
>> 532 if( Intersects_AF )
>> 533 {
>> 534 // G is our new Candidate for the intersection point.
>> 535 // It replaces "E" and we will repeat the test to see if
>> 536 // it is a good enough approximate point for us.
>> 537 // B <- F
>> 538 // E <- G
>> 539 CurrentB_PointVelocity = ApproxIntersecPointV;
>> 540 CurrentE_Point = PointG;
>> 541
>> 542 // By moving point B, must take care if current AF has no intersection
>> 543 // to try current FB!!
>> 544 final_section= false;
>> 545
>> 546 #ifdef G4VERBOSE
>> 547 if( fVerboseLevel > 3 ){
>> 548 G4cout << "G4PiF::LI> Investigating intermediate point"
>> 549 << " at s=" << ApproxIntersecPointV.GetCurveLength()
>> 550 << " on way to full s=" << CurveEndPointVelocity.GetCurveLength()
>> 551 << G4endl;
>> 552 }
>> 553 #endif
>> 554 }
>> 555 else // not Intersects_AF
>> 556 {
>> 557 // In this case:
>> 558 // There is NO intersection of AF with a volume boundary.
>> 559 // We must continue the search in the segment FB!
>> 560 fNavigator->LocateGlobalPointWithinVolume( CurrentF_Point );
>> 561
>> 562 G4double stepLengthFB;
>> 563 G4ThreeVector PointH;
>> 564 // Check whether any volumes are encountered by the chord FB
>> 565 // ---------------------------------------------------------
>> 566 G4bool Intersects_FB =
>> 567 IntersectChord( CurrentF_Point, Point_B,
>> 568 NewSafety, stepLengthFB, PointH );
>> 569 if( Intersects_FB )
>> 570 {
>> 571 // There is an intersection of FB with a volume boundary
>> 572 // H <- First Intersection of Chord FB
>> 573
>> 574 // H is our new Candidate for the intersection point.
>> 575 // It replaces "E" and we will repeat the test to see if
>> 576 // it is a good enough approximate point for us.
>> 577
>> 578 // Note that F must be in volume volA (the same as A)
>> 579 // (otherwise AF would meet a volume boundary!)
>> 580 // A <- F
>> 581 // E <- H
>> 582 CurrentA_PointVelocity = ApproxIntersecPointV;
>> 583 CurrentE_Point = PointH;
>> 584 }
>> 585 else // not Intersects_FB
>> 586 {
>> 587 // There is NO intersection of FB with a volume boundary
>> 588 if( final_section ){
>> 589 // If B is the original endpoint, this means that whatever volume(s)
>> 590 // intersected the original chord, none touch the smaller chords
>> 591 // we have used.
>> 592 // The value of IntersectedOrRecalculatedFT returned is likely not valid
>> 593 //
>> 594 there_is_no_intersection = true;
>> 595 }else{
>> 596 // We must restore the original endpoint
>> 597 CurrentA_PointVelocity= CurrentB_PointVelocity; // We have got to B
>> 598 CurrentB_PointVelocity= CurveEndPointVelocity;
>> 599 restoredFullEndpoint = true;
>> 600 }
>> 601
>> 602 } // Endif (Intersects_FB)
>> 603 } // Endif (Intersects_AF)
>> 604
>> 605 // Ensure that the new endpoints are not further apart in space
>> 606 // than on the curve due to different errors in the integration
>> 607 //
>> 608 G4double linDistSq, curveDist;
>> 609 linDistSq = ( CurrentB_PointVelocity.GetPosition()
>> 610 - CurrentA_PointVelocity.GetPosition() ).mag2();
>> 611 curveDist = CurrentB_PointVelocity.GetCurveLength()
>> 612 - CurrentA_PointVelocity.GetCurveLength();
>> 613 if( curveDist*(curveDist+2*perMillion ) < linDistSq )
>> 614 {
>> 615 // Re-integrate to obtain a new B
>> 616 //
>> 617 G4FieldTrack newEndPointFT=
>> 618 ReEstimateEndpoint( CurrentA_PointVelocity,
>> 619 CurrentB_PointVelocity,
>> 620 linDistSq, // to avoid recalculation
>> 621 curveDist );
>> 622 G4FieldTrack oldPointVelB = CurrentB_PointVelocity;
>> 623 CurrentB_PointVelocity = newEndPointFT;
>> 624
>> 625 if( final_section ){
>> 626 recalculatedEndPoint= true;
>> 627 IntersectedOrRecalculatedFT= newEndPointFT; // So that we can return it,
>> 628 // if it is the endpoint!
>> 629 }
>> 630 }
>> 631 if( curveDist < 0.0 )
>> 632 {
>> 633 G4cerr << "G4PropagatorInField::LocateIntersectionPoint():" << G4endl
>> 634 << "Error in advancing propagation." << G4endl;
>> 635 fVerboseLevel= 5; // Print out a maximum of information
>> 636 printStatus( CurrentA_PointVelocity, CurrentB_PointVelocity,
>> 637 -1.0, NewSafety, substep_no, 0);
>> 638 G4cerr << " Point A (start) is " << CurrentA_PointVelocity << G4endl;
>> 639 G4cerr << " Point B (end) is " << CurrentB_PointVelocity << G4endl;
>> 640 G4cerr << " curveDist is " << curveDist << G4endl;
>> 641 G4cerr << G4endl
>> 642 << "The final curve point is not further along"
>> 643 << " than the original!" << G4endl;
>> 644 G4Exception("G4PropagatorInField::LocateIntersectionPoint()", "FatalError",
>> 645 FatalException, "Error in advancing propagation.");
>> 646 }
>> 647
>> 648 if(restoredFullEndpoint) {
>> 649 final_section= restoredFullEndpoint;
>> 650 restoredFullEndpoint=false;
>> 651 }
>> 652
>> 653 } // EndIf ( E is close enough to the curve, ie point F. )
>> 654 // tests ChordAF_Vector.mag() <= maximum_lateral_displacement
>> 655
>> 656 } while ( ( ! found_approximate_intersection )
>> 657 && ( ! there_is_no_intersection )
>> 658 && ( substep_no++ < max_substeps) ); // UNTIL found or failed
>> 659
>> 660 #ifdef G4VERBOSE
>> 661 if( substep_no >= max_substeps ) {
>> 662 G4cerr << "Problem in G4PropagatorInField::LocateIntersectionPoint:"
>> 663 << " Convergence is requiring too many substeps: " << substep_no;
>> 664 G4cerr << " Will abandon effort to intersect. " << G4endl;
>> 665 G4cerr << " Information on start & current step follows in cout: " << G4endl;
>> 666 printStatus( CurrentA_PointVelocity, CurrentA_PointVelocity,
>> 667 -1.0, NewSafety, 0, 0);
>> 668 printStatus( CurrentA_PointVelocity, CurrentB_PointVelocity,
>> 669 -1.0, NewSafety, substep_no, 0);
>> 670 }
>> 671 #endif
>> 672
>> 673 return !there_is_no_intersection; // Success or failure
>> 674 }
>> 675
>> 676 ///////////////////////////////////////////////////////////////////////////
531 // 677 //
>> 678 // Dumps status of propagator.
>> 679
532 void 680 void
533 G4PropagatorInField::printStatus( const G4Fiel << 681 G4PropagatorInField::printStatus( const G4FieldTrack& StartFT,
534 const G4Fiel << 682 const G4FieldTrack& CurrentFT,
535 G4doub << 683 G4double requestStep,
536 G4doub << 684 G4double safety,
537 G4int << 685 G4int stepNo,
538 G4VPhy << 686 G4VPhysicalVolume* startVolume)
539 { 687 {
540 const G4int verboseLevel = fVerboseLevel; << 688 const G4int verboseLevel= fVerboseLevel;
541 const G4ThreeVector StartPosition = St 689 const G4ThreeVector StartPosition = StartFT.GetPosition();
542 const G4ThreeVector StartUnitVelocity = St 690 const G4ThreeVector StartUnitVelocity = StartFT.GetMomentumDir();
543 const G4ThreeVector CurrentPosition = Cu 691 const G4ThreeVector CurrentPosition = CurrentFT.GetPosition();
544 const G4ThreeVector CurrentUnitVelocity = Cu 692 const G4ThreeVector CurrentUnitVelocity = CurrentFT.GetMomentumDir();
545 693
546 G4double step_len = CurrentFT.GetCurveLength 694 G4double step_len = CurrentFT.GetCurveLength() - StartFT.GetCurveLength();
547 <<
548 G4long oldprec; // cout/cerr precision set <<
549 695
550 if( ((stepNo == 0) && (verboseLevel <3)) || << 696 if( ((stepNo == 0) && (verboseLevel <3))
>> 697 || (verboseLevel == 3) )
551 { 698 {
552 oldprec = G4cout.precision(4); << 699 static G4int noPrecision= 4;
553 G4cout << std::setw( 5) << "Step#" << 700 G4cout.precision(noPrecision);
554 << std::setw(10) << " s " << " " << 701 // G4cout.setf(ios_base::fixed,ios_base::floatfield);
>> 702 G4cout << std::setw( 6) << " "
>> 703 << std::setw( 25) << " Current Position and Direction" << " "
>> 704 << G4endl;
>> 705 G4cout << std::setw( 5) << "Step#" << " "
555 << std::setw(10) << "X(mm)" << " " 706 << std::setw(10) << "X(mm)" << " "
556 << std::setw(10) << "Y(mm)" << " " 707 << std::setw(10) << "Y(mm)" << " "
557 << std::setw(10) << "Z(mm)" << " " 708 << std::setw(10) << "Z(mm)" << " "
558 << std::setw( 7) << " N_x " << " " 709 << std::setw( 7) << " N_x " << " "
559 << std::setw( 7) << " N_y " << " " 710 << std::setw( 7) << " N_y " << " "
560 << std::setw( 7) << " N_z " << " " << 711 << std::setw( 7) << " N_z " << " "
561 G4cout << std::setw( 7) << " Delta|N|" << << 712 << std::setw( 7) << " Delta|N|" << " "
>> 713 // << std::setw( 7) << " Delta(N_z) " << " "
562 << std::setw( 9) << "StepLen" << " 714 << std::setw( 9) << "StepLen" << " "
563 << std::setw(12) << "StartSafety" < 715 << std::setw(12) << "StartSafety" << " "
564 << std::setw( 9) << "PhsStep" << " << 716 << std::setw( 9) << "PhsStep" << " "
565 if( startVolume != nullptr ) << 717 << std::setw(18) << "NextVolume" << " "
566 { G4cout << std::setw(18) << "NextVolume <<
567 G4cout.precision(oldprec); <<
568 G4cout << G4endl; <<
569 } <<
570 if((stepNo == 0) && (verboseLevel <=3)) <<
571 { <<
572 // Recurse to print the start values <<
573 // <<
574 printStatus( StartFT, StartFT, -1.0, safet <<
575 } <<
576 if( verboseLevel <= 3 ) <<
577 { <<
578 if( stepNo >= 0) <<
579 { G4cout << std::setw( 4) << stepNo << " <<
580 else <<
581 { G4cout << std::setw( 5) << "Start" ; } <<
582 oldprec = G4cout.precision(8); <<
583 G4cout << std::setw(10) << CurrentFT.GetCu <<
584 G4cout.precision(8); <<
585 G4cout << std::setw(10) << CurrentPosition <<
586 << std::setw(10) << CurrentPosition <<
587 << std::setw(10) << CurrentPosition <<
588 G4cout.precision(4); <<
589 G4cout << std::setw( 7) << CurrentUnitVelo <<
590 << std::setw( 7) << CurrentUnitVelo <<
591 << std::setw( 7) << CurrentUnitVelo <<
592 G4cout.precision(3); <<
593 G4cout << std::setw( 7) <<
594 << CurrentFT.GetMomentum().mag()-St <<
595 G4cout << std::setw( 9) << step_len << " " <<
596 G4cout << std::setw(12) << safety << " "; <<
597 if( requestStep != -1.0 ) <<
598 { G4cout << std::setw( 9) << requestStep <<
599 else <<
600 { G4cout << std::setw( 9) << "Init/NotKn <<
601 if( startVolume != nullptr) <<
602 { G4cout << std::setw(12) << startVolume <<
603 G4cout.precision(oldprec); <<
604 G4cout << G4endl; <<
605 } <<
606 else // if( verboseLevel > 3 ) <<
607 { <<
608 // Multi-line output <<
609 <<
610 G4cout << "Step taken was " << step_len <<
611 << " out of PhysicalStep = " << re <<
612 G4cout << "Final safety is: " << safety << <<
613 G4cout << "Chord length = " << (CurrentPos <<
614 << G4endl; 718 << G4endl;
615 G4cout << G4endl; <<
616 } 719 }
>> 720 if((stepNo == 0) && (verboseLevel <=3)){
>> 721 // Recurse to print the start values
>> 722 //
>> 723 printStatus( StartFT, StartFT, -1.0, safety, -1, startVolume);
>> 724 }
>> 725 if( verboseLevel <= 3 )
>> 726 {
>> 727 G4cout.precision(8);
>> 728 if( stepNo >= 0)
>> 729 G4cout << std::setw( 5) << stepNo << " ";
>> 730 else
>> 731 G4cout << std::setw( 5) << "Start" << " ";
>> 732 G4cout << std::setw(10) << CurrentPosition.x() << " "
>> 733 << std::setw(10) << CurrentPosition.y() << " "
>> 734 << std::setw(10) << CurrentPosition.z() << " "
>> 735 << std::setw( 7) << CurrentUnitVelocity.x() << " "
>> 736 << std::setw( 7) << CurrentUnitVelocity.y() << " "
>> 737 << std::setw( 7) << CurrentUnitVelocity.z() << " ";
>> 738 G4cout.precision(2);
>> 739 G4cout << std::setw( 7) << CurrentFT.GetMomentum().mag()- StartFT.GetMomentum().mag() << " ";
>> 740 // << std::setw( 7) << CurrentUnitVelocity.z() - InitialUnitVelocity.z() << " ";
>> 741 G4cout << std::setw( 9) << step_len << " ";
>> 742 G4cout << std::setw(12) << safety << " ";
>> 743 if( requestStep != -1.0 )
>> 744 G4cout << std::setw( 9) << requestStep << " ";
>> 745 else
>> 746 G4cout << std::setw( 9) << "Init/NotKnown" << " ";
>> 747
>> 748 if( startVolume != 0)
>> 749 {
>> 750 G4cout << std::setw(12) << startVolume->GetName() << " ";
>> 751 }
>> 752 else
>> 753 {
>> 754 if( step_len != -1 )
>> 755 G4cout << std::setw(12) << "OutOfWorld" << " ";
>> 756 else
>> 757 G4cout << std::setw(12) << "NotGiven" << " ";
>> 758 }
>> 759
>> 760 G4cout << G4endl;
>> 761 }
>> 762 else // if( verboseLevel > 3 )
>> 763 {
>> 764 // Multi-line output
>> 765
>> 766 G4cout << "Step taken was " << step_len
>> 767 << " out of PhysicalStep= " << requestStep << G4endl;
>> 768 G4cout << "Final safety is: " << safety << G4endl;
>> 769
>> 770 G4cout << "Chord length = " << (CurrentPosition-StartPosition).mag()
>> 771 << G4endl;
>> 772 G4cout << G4endl;
>> 773 }
617 } 774 }
618 775
619 // ------------------------------------------- << 776 ///////////////////////////////////////////////////////////////////////////
620 // Prints Step diagnostics <<
621 // 777 //
>> 778 // Prints Step diagnostics
>> 779
622 void 780 void
623 G4PropagatorInField::PrintStepLengthDiagnostic 781 G4PropagatorInField::PrintStepLengthDiagnostic(
624 G4double CurrentProp 782 G4double CurrentProposedStepLength,
625 G4double decreaseFac 783 G4double decreaseFactor,
626 G4double stepTrial, 784 G4double stepTrial,
627 const G4FieldTrack& ) 785 const G4FieldTrack& )
628 { 786 {
629 G4long iprec= G4cout.precision(8); << 787 G4cout << " PiF: NoZeroStep= " << fNoZeroStep
630 G4cout << " " << std::setw(12) << " PiF: NoZ << 788 << " CurrentProposedStepLength= " << CurrentProposedStepLength
631 << " " << std::setw(20) << " CurrentP << 789 << " Full_curvelen_last=" << fFull_CurveLen_of_LastAttempt
632 << " " << std::setw(18) << " Full_cur << 790 << " last proposed step-length= " << fLast_ProposedStepLength
633 << " " << std::setw(18) << " last pro << 791 << " decreate factor = " << decreaseFactor
634 << " " << std::setw(18) << " decrease << 792 << " step trial = " << stepTrial
635 << " " << std::setw(15) << " step tri <<
636 << G4endl; 793 << G4endl;
>> 794 }
637 795
638 G4cout << " " << std::setw(10) << fNoZeroSte << 796 G4bool
639 << " " << std::setw(20) << CurrentPro << 797 G4PropagatorInField::IntersectChord( G4ThreeVector StartPointA,
640 << " " << std::setw(18) << fFull_Curv << 798 G4ThreeVector EndPointB,
641 << " " << std::setw(18) << fLast_Prop << 799 G4double &NewSafety,
642 << " " << std::setw(18) << decreaseFa << 800 G4double &LinearStepLength,
643 << " " << std::setw(15) << stepTrial << 801 G4ThreeVector &IntersectionPoint
644 << G4endl; << 802 )
645 G4cout.precision( iprec ); << 803 {
>> 804 // Calculate the direction and length of the chord AB
>> 805 G4ThreeVector ChordAB_Vector = EndPointB - StartPointA;
>> 806 G4double ChordAB_Length = ChordAB_Vector.mag(); // Magnitude (norm)
>> 807 G4ThreeVector ChordAB_Dir = ChordAB_Vector.unit();
>> 808 G4bool intersects;
>> 809
>> 810 G4ThreeVector OriginShift = StartPointA - fPreviousSftOrigin ;
>> 811 G4double MagSqShift = OriginShift.mag2() ;
>> 812 G4double currentSafety;
>> 813 G4bool doCallNav= false;
>> 814
>> 815 if( MagSqShift >= sqr(fPreviousSafety) )
>> 816 {
>> 817 currentSafety = 0.0 ;
>> 818 }else{
>> 819 currentSafety = fPreviousSafety - std::sqrt(MagSqShift) ;
>> 820 }
>> 821
>> 822 if( fUseSafetyForOptimisation && (ChordAB_Length <= currentSafety) )
>> 823 {
>> 824 // The Step is guaranteed to be taken
>> 825
>> 826 LinearStepLength = ChordAB_Length;
>> 827 intersects = false;
>> 828
>> 829 NewSafety= currentSafety;
>> 830 }
>> 831 else
>> 832 {
>> 833 doCallNav= true;
>> 834 // Check whether any volumes are encountered by the chord AB
>> 835 LinearStepLength =
>> 836 fNavigator->ComputeStep( StartPointA, ChordAB_Dir,
>> 837 ChordAB_Length, NewSafety );
>> 838 intersects = (LinearStepLength <= ChordAB_Length);
>> 839 // G4Navigator contracts to return k_infinity if len==asked
>> 840 // and it did not find a surface boundary at that length
>> 841 LinearStepLength = std::min( LinearStepLength, ChordAB_Length);
>> 842
>> 843 // Save the last calculated safety!
>> 844 fPreviousSftOrigin = StartPointA;
>> 845 fPreviousSafety= NewSafety;
>> 846
>> 847 if( intersects ){
>> 848 // Intersection Point of chord AB and either volume A's surface
>> 849 // or a daughter volume's surface ..
>> 850 IntersectionPoint = StartPointA + LinearStepLength * ChordAB_Dir;
>> 851 }
>> 852 }
>> 853
>> 854 #ifdef DEBUG_INTERSECTS_CHORD
>> 855 // printIntersection(
>> 856 // StartPointA, EndPointB, LinearStepLength, IntersectionPoint, NewSafety
>> 857
>> 858 G4cout << "Start=" << std::setw(12) << StartPointA << " "
>> 859 << "End= " << std::setw(8) << EndPointB << " "
>> 860 << "StepIn=" << std::setw(8) << LinearStepLength << " "
>> 861 << "NewSft=" << std::setw(8) << NewSafety
>> 862 << "NavCall" << doCallNav << " "
>> 863 << "In T/F " << intersects << " "
>> 864 << "IntrPt=" << std::setw(8) << IntersectionPoint << " "
>> 865 << G4endl;
>> 866 #endif
>> 867
>> 868 return intersects;
>> 869 }
>> 870
>> 871 // --------------------- oooo000000000000oooo ----------------------------
>> 872
>> 873 G4FieldTrack G4PropagatorInField::
>> 874 ReEstimateEndpoint( const G4FieldTrack &CurrentStateA,
>> 875 const G4FieldTrack &EstimatedEndStateB,
>> 876 G4double linearDistSq,
>> 877 G4double curveDist
>> 878 )
>> 879 {
>> 880 // G4double checkCurveDist= EstimatedEndStateB.GetCurveLength()
>> 881 // - CurrentStateA.GetCurveLength();
>> 882 // G4double checkLinDistSq= (EstimatedEndStateB.GetPosition()
>> 883 // - CurrentStateA.GetPosition() ).mag2();
>> 884
>> 885 G4FieldTrack newEndPoint( CurrentStateA );
>> 886 G4MagInt_Driver* integrDriver= GetChordFinder()->GetIntegrationDriver();
>> 887
>> 888 G4FieldTrack retEndPoint( CurrentStateA );
>> 889 G4bool goodAdvance;
>> 890 G4int itrial=0;
>> 891 const G4int no_trials= 20;
>> 892
>> 893 G4double endCurveLen= EstimatedEndStateB.GetCurveLength();
>> 894 do
>> 895 {
>> 896 G4double currentCurveLen= newEndPoint.GetCurveLength();
>> 897 G4double advanceLength= endCurveLen - currentCurveLen ;
>> 898
>> 899 goodAdvance=
>> 900 integrDriver->AccurateAdvance(newEndPoint, advanceLength, fEpsilonStep);
>> 901 // ***************
>> 902 }
>> 903 while( !goodAdvance && (++itrial < no_trials) );
>> 904
>> 905 if( goodAdvance ) {
>> 906 retEndPoint= newEndPoint;
>> 907 }else{
>> 908 retEndPoint= EstimatedEndStateB; // Could not improve without major work !!
>> 909 }
>> 910
>> 911 // All the work is done
>> 912 // below are some diagnostics only -- before the return!
>> 913 //
>> 914 static const G4String MethodName("G4PropagatorInField::ReEstimateEndpoint");
>> 915 #ifdef G4VERBOSE
>> 916 G4int latest_good_trials=0;
>> 917 if( itrial > 1) {
>> 918 if( fVerboseLevel > 0 ) {
>> 919 G4cout << MethodName << " called - goodAdv= " << goodAdvance
>> 920 << " trials = " << itrial << " previous good= " << latest_good_trials
>> 921 << G4endl;
>> 922 }
>> 923 latest_good_trials=0;
>> 924 }else{
>> 925 latest_good_trials++;
>> 926 }
>> 927 #endif
>> 928
>> 929 #ifdef G4DEBUG_FIELD
>> 930 G4double lengthDone= newEndPoint.GetCurveLength()
>> 931 - CurrentStateA.GetCurveLength();
>> 932 if( !goodAdvance ) {
>> 933 if( fVerboseLevel >= 3 ){
>> 934 G4cout << MethodName << "> AccurateAdvance failed " ;
>> 935 G4cout << " in " << itrial << " integration trials/steps. " << G4endl
>> 936 G4cout << " It went only " << lengthDone << " instead of " << curveDist
>> 937 << " -- a difference of " << curveDist - lengthDone << G4endl;
>> 938 G4cout << " ReEstimateEndpoint> Reset endPoint to original value!" << G4endl;
>> 939 }
>> 940 }
>> 941
>> 942 static G4int noInaccuracyWarnings = 0;
>> 943 G4int maxNoWarnings = 10;
>> 944 if ( (noInaccuracyWarnings < maxNoWarnings )
>> 945 || (fVerboseLevel > 1) )
>> 946 {
>> 947 G4cerr << "G4PropagatorInField::LocateIntersectionPoint():"
>> 948 << G4endl
>> 949 << " Warning: Integration inaccuracy requires"
>> 950 << " an adjustment in the step's endpoint." << G4endl
>> 951 << " Two mid-points are further apart than their"
>> 952 << " curve length difference" << G4endl
>> 953 << " Dist = " << std::sqrt(linearDistSq)
>> 954 << " curve length = " << curveDist << G4endl;
>> 955 G4cerr << " Correction applied is "
>> 956 << (newEndPoint.GetPosition()-EstimatedEndStateB.GetPosition()).mag()
>> 957 << G4endl;
>> 958 }
>> 959 #else
>> 960 // Statistics on the RMS value of the corrections
>> 961 static G4int noCorrections=0;
>> 962 static G4double sumCorrectionsSq = 0;
>> 963 noCorrections++;
>> 964 if( goodAdvance ){
>> 965 sumCorrectionsSq += (EstimatedEndStateB.GetPosition() -
>> 966 newEndPoint.GetPosition()).mag2();
>> 967 }
>> 968 linearDistSq -= curveDist; // To use linearDistSq ... !
>> 969 #endif
>> 970
>> 971 return retEndPoint;
646 } 972 }
647 973
648 // Access the points which have passed through 974 // Access the points which have passed through the filter. The
649 // points are stored as ThreeVectors for the i 975 // points are stored as ThreeVectors for the initial impelmentation
650 // only (jacek 30/10/2002) 976 // only (jacek 30/10/2002)
651 // Responsibility for deleting the points lies 977 // Responsibility for deleting the points lies with
652 // SmoothTrajectoryPoint, which is the points' 978 // SmoothTrajectoryPoint, which is the points' final
653 // destination. The points pointer is set to N 979 // destination. The points pointer is set to NULL, to ensure that
654 // the points are not re-used in subsequent st 980 // the points are not re-used in subsequent steps, therefore THIS
655 // METHOD MUST BE CALLED EXACTLY ONCE PER STEP 981 // METHOD MUST BE CALLED EXACTLY ONCE PER STEP. (jacek 08/11/2002)
656 982
>> 983
657 std::vector<G4ThreeVector>* 984 std::vector<G4ThreeVector>*
658 G4PropagatorInField::GimmeTrajectoryVectorAndF << 985 G4PropagatorInField::GimmeTrajectoryVectorAndForgetIt() const {
659 { <<
660 // NB, GimmeThePointsAndForgetThem really fo 986 // NB, GimmeThePointsAndForgetThem really forgets them, so it can
661 // only be called (exactly) once for each st 987 // only be called (exactly) once for each step.
662 << 988 if (fpTrajectoryFilter) {
663 if (fpTrajectoryFilter != nullptr) <<
664 { <<
665 return fpTrajectoryFilter->GimmeThePointsA 989 return fpTrajectoryFilter->GimmeThePointsAndForgetThem();
>> 990 } else {
>> 991 return NULL;
666 } 992 }
667 return nullptr; <<
668 } 993 }
669 994
670 // ------------------------------------------- <<
671 // <<
672 void 995 void
673 G4PropagatorInField::SetTrajectoryFilter(G4VCu << 996 G4PropagatorInField::SetTrajectoryFilter(G4VCurvedTrajectoryFilter* filter) {
674 { <<
675 fpTrajectoryFilter = filter; 997 fpTrajectoryFilter = filter;
676 } 998 }
677 999
678 // ------------------------------------------- << 1000
679 // <<
680 void G4PropagatorInField::ClearPropagatorState 1001 void G4PropagatorInField::ClearPropagatorState()
681 { 1002 {
682 // Goal: Clear all memory of previous steps, << 1003 G4Exception("G4PropagatorInField::ClearPropagatorState()", "NotImplemented",
683 << 1004 FatalException, "Functionality not yet implemented.");
684 fParticleIsLooping = false; <<
685 fNoZeroStep = 0; <<
686 <<
687 fSetFieldMgr = false; // Has field-manager <<
688 fEpsilonStep= 1.0e-5; // Relative accuracy <<
689 <<
690 End_PointAndTangent= G4FieldTrack( G4ThreeVe <<
691 G4ThreeVe <<
692 0.0,0.0,0 <<
693 fFull_CurveLen_of_LastAttempt = -1; <<
694 fLast_ProposedStepLength = -1; <<
695 <<
696 fPreviousSftOrigin= G4ThreeVector(0.,0.,0.); <<
697 fPreviousSafety= 0.0; <<
698 <<
699 fNewTrack = true; <<
700 } 1005 }
701 1006
702 // ------------------------------------------- << 1007 G4FieldManager*
703 // << 1008 G4PropagatorInField::FindAndSetFieldManager( G4VPhysicalVolume* pCurrentPhysicalVolume)
704 G4FieldManager* G4PropagatorInField:: <<
705 FindAndSetFieldManager( G4VPhysicalVolume* pCu <<
706 { 1009 {
707 G4FieldManager* currentFieldMgr; 1010 G4FieldManager* currentFieldMgr;
708 1011
709 currentFieldMgr = fDetectorFieldMgr; 1012 currentFieldMgr = fDetectorFieldMgr;
710 if( pCurrentPhysicalVolume != nullptr ) << 1013 if( pCurrentPhysicalVolume)
711 { 1014 {
712 G4FieldManager *pRegionFieldMgr = nullptr << 1015 G4FieldManager *newFieldMgr = 0;
713 G4LogicalVolume* pLogicalVol = pCurrentPh << 1016 newFieldMgr= pCurrentPhysicalVolume->GetLogicalVolume()->GetFieldManager();
714 << 1017 if ( newFieldMgr )
715 if( pLogicalVol != nullptr ) << 1018 currentFieldMgr = newFieldMgr;
716 { <<
717 // Value for Region, if any, overrides <<
718 // <<
719 G4Region* pRegion = pLogicalVol->GetR <<
720 if( pRegion != nullptr ) <<
721 { <<
722 pRegionFieldMgr = pRegion->GetField <<
723 if( pRegionFieldMgr != nullptr ) <<
724 { <<
725 currentFieldMgr= pRegionFieldMgr <<
726 } <<
727 } <<
728 <<
729 // 'Local' Value from logical volume, <<
730 // <<
731 localFieldMgr = pLogicalVol->GetFieldM <<
732 if ( localFieldMgr != nullptr ) <<
733 { <<
734 currentFieldMgr = localFieldMgr; <<
735 } <<
736 } <<
737 } 1019 }
738 fCurrentFieldMgr = currentFieldMgr; << 1020 fCurrentFieldMgr= currentFieldMgr;
739 1021
740 // Flag that field manager has been set << 1022 // Flag that field manager has been set.
741 // << 1023 fSetFieldMgr= true;
742 fSetFieldMgr = true; <<
743 1024
744 return currentFieldMgr; 1025 return currentFieldMgr;
745 } 1026 }
746 1027
747 // ------------------------------------------- << 1028 G4int G4PropagatorInField::SetVerboseLevel( G4int Verbose )
748 // <<
749 G4int G4PropagatorInField::SetVerboseLevel( G4 <<
750 { 1029 {
751 G4int oldval = fVerboseLevel; << 1030 G4int oldval= fVerboseLevel;
752 fVerboseLevel = level; << 1031 fVerboseLevel= Verbose;
753 1032
754 // Forward the verbose level 'reduced' to Ch << 1033 // Forward the verbose level 'reduced' to ChordFinder, MagIntegratorDriver ... ?
755 // MagIntegratorDriver ... ? << 1034 G4MagInt_Driver* integrDriver= GetChordFinder()->GetIntegrationDriver();
756 // << 1035 integrDriver->SetVerboseLevel( Verbose - 2 );
757 auto integrDriver = GetChordFinder()->GetInt << 1036 G4cout << "Set Driver verbosity to " << Verbose - 2 << G4endl;
758 integrDriver->SetVerboseLevel( fVerboseLevel <<
759 G4cout << "Set Driver verbosity to " << fVer <<
760 1037
761 return oldval; 1038 return oldval;
762 } <<
763 <<
764 // ------------------------------------------- <<
765 // <<
766 void G4PropagatorInField::ReportLoopingParticl <<
767 <<
768 <<
769 <<
770 <<
771 <<
772 { <<
773 std::ostringstream message; <<
774 G4double fraction = StepTaken / StepRequest <<
775 message << " Unfinished integration of trac <<
776 << " of momentum " << momentumVec < <<
777 << momentumVec.mag() << " ) " << G4 <<
778 << " after " << count << " field su <<
779 << " totaling " << std::setprecisio <<
780 << " out of requested step " << std <<
781 << StepRequested / mm << " mm "; <<
782 message << " a fraction of "; <<
783 G4int prec = 4; <<
784 if( fraction > 0.99 ) <<
785 { <<
786 prec = 7; <<
787 } <<
788 else <<
789 { <<
790 if (fraction > 0.97 ) { prec = 5; } <<
791 } <<
792 message << std::setprecision(prec) <<
793 << 100. * StepTaken / StepRequested <<
794 if( pPhysVol != nullptr ) <<
795 { <<
796 message << " in volume " << pPhysVol->Get <<
797 auto material = pPhysVol->GetLogicalVolum <<
798 if( material != nullptr ) <<
799 { <<
800 message << " with material " << materia <<
801 << " ( density = " <<
802 << material->GetDensity() / ( g <<
803 } <<
804 } <<
805 else <<
806 { <<
807 message << " in unknown (null) volume. " <<
808 } <<
809 G4Exception(methodName, "GeomNav1002", Just <<
810 } <<
811 <<
812 // ------------------------------------------- <<
813 // <<
814 void G4PropagatorInField::ReportStuckParticle( <<
815 <<
816 <<
817 <<
818 { <<
819 std::ostringstream message; <<
820 message << "Particle is stuck; it will be k <<
821 << " Zero progress for " << noZero <<
822 << G4endl <<
823 << " Proposed Step is " << propose <<
824 << " but Step Taken is "<< lastTrie <<
825 if( physVol != nullptr ) <<
826 { <<
827 message << " in volume " << physVol->Get <<
828 } <<
829 else <<
830 { <<
831 message << " in unknown or null volume. <<
832 } <<
833 G4Exception("G4PropagatorInField::ComputeSt <<
834 "GeomNav1002", JustWarning, mes <<
835 } <<
836 <<
837 // ------------------------------------------- <<
838 <<
839 // ------------------------------------------- <<
840 // Methods to alter Parameters <<
841 // ------------------------------------------- <<
842 <<
843 // Was a data member (of an object) -- now mov <<
844 G4double G4PropagatorInField::GetLargestAccep <<
845 { <<
846 return fLargestAcceptableStep; <<
847 } <<
848 <<
849 // ------------------------------------------- <<
850 // <<
851 void G4PropagatorInField::SetLargestAcceptable <<
852 { <<
853 if( fLargestAcceptableStep>0.0 ) <<
854 { <<
855 fLargestAcceptableStep = newBigDist; <<
856 } <<
857 } <<
858 <<
859 // ------------------------------------------- <<
860 <<
861 G4double G4PropagatorInField::GetMaxStepSizeMu <<
862 { <<
863 return fMaxStepSizeMultiplier; <<
864 } <<
865 <<
866 // ------------------------------------------- <<
867 <<
868 void G4PropagatorInField::SetMaxStepSizeMu <<
869 { <<
870 fMaxStepSizeMultiplier=vm; <<
871 } <<
872 <<
873 // ------------------------------------------- <<
874 <<
875 G4double G4PropagatorInField::GetMinBigDistanc <<
876 { <<
877 return fMinBigDistance; <<
878 } <<
879 <<
880 // ------------------------------------------- <<
881 <<
882 void G4PropagatorInField::SetMinBigDistanc <<
883 { <<
884 fMinBigDistance= val; <<
885 } 1039 }
886 1040