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25 // 25 //
26 // class G4BrentLocator implementation 26 // class G4BrentLocator implementation
27 // 27 //
28 // 27.10.08 - Tatiana Nikitina. 28 // 27.10.08 - Tatiana Nikitina.
29 // 04.10.11 - John Apostolakis, revised conver 29 // 04.10.11 - John Apostolakis, revised convergence to use Surface Normal
30 // ------------------------------------------- 30 // ---------------------------------------------------------------------------
31 31
32 #include <iomanip> 32 #include <iomanip>
33 33
34 #include "G4BrentLocator.hh" 34 #include "G4BrentLocator.hh"
35 #include "G4ios.hh" 35 #include "G4ios.hh"
36 36
37 G4BrentLocator::G4BrentLocator(G4Navigator *th 37 G4BrentLocator::G4BrentLocator(G4Navigator *theNavigator)
38 : G4VIntersectionLocator(theNavigator) 38 : G4VIntersectionLocator(theNavigator)
39 { 39 {
40 // In case of too slow progress in finding I 40 // In case of too slow progress in finding Intersection Point
41 // intermediates Points on the Track must be 41 // intermediates Points on the Track must be stored.
42 // Initialise the array of Pointers [max_dep 42 // Initialise the array of Pointers [max_depth+1] to do this
43 43
44 G4ThreeVector zeroV(0.0,0.0,0.0); 44 G4ThreeVector zeroV(0.0,0.0,0.0);
45 for (auto & idepth : ptrInterMedFT) << 45 for (auto idepth=0; idepth<max_depth+1; ++idepth )
46 { 46 {
47 idepth = new G4FieldTrack( zeroV, zeroV, 0 << 47 ptrInterMedFT[ idepth ] = new G4FieldTrack( zeroV, zeroV, 0., 0., 0., 0.);
48 } 48 }
49 } 49 }
50 50
51 G4BrentLocator::~G4BrentLocator() 51 G4BrentLocator::~G4BrentLocator()
52 { 52 {
53 for (auto & idepth : ptrInterMedFT) << 53 for ( auto idepth=0; idepth<max_depth+1; ++idepth )
54 { 54 {
55 delete idepth; << 55 delete ptrInterMedFT[idepth];
56 } 56 }
57 } 57 }
58 58
59 // ------------------------------------------- 59 // --------------------------------------------------------------------------
60 // G4bool G4PropagatorInField::LocateIntersect 60 // G4bool G4PropagatorInField::LocateIntersectionPoint(
61 // const G4FieldTrack& CurveStart 61 // const G4FieldTrack& CurveStartPointVelocity, // A
62 // const G4FieldTrack& CurveEndPo 62 // const G4FieldTrack& CurveEndPointVelocity, // B
63 // const G4ThreeVector& TrialPoint 63 // const G4ThreeVector& TrialPoint, // E
64 // G4FieldTrack& Intersecte 64 // G4FieldTrack& IntersectedOrRecalculated // Output
65 // G4bool& recalculat 65 // G4bool& recalculated) // Out
66 // ------------------------------------------- 66 // --------------------------------------------------------------------------
67 // 67 //
68 // Function that returns the intersection of t 68 // Function that returns the intersection of the true path with the surface
69 // of the current volume (either the external 69 // of the current volume (either the external one or the inner one with one
70 // of the daughters: 70 // of the daughters:
71 // 71 //
72 // A = Initial point 72 // A = Initial point
73 // B = another point 73 // B = another point
74 // 74 //
75 // Both A and B are assumed to be on the true 75 // Both A and B are assumed to be on the true path:
76 // 76 //
77 // E is the first point of intersection of 77 // E is the first point of intersection of the chord AB with
78 // a volume other than A (on the surface 78 // a volume other than A (on the surface of A or of a daughter)
79 // 79 //
80 // Convention of Use : 80 // Convention of Use :
81 // i) If it returns "true", then Intersect 81 // i) If it returns "true", then IntersectionPointVelocity is set
82 // to the approximate intersection poin 82 // to the approximate intersection point.
83 // ii) If it returns "false", no intersecti 83 // ii) If it returns "false", no intersection was found.
84 // The validity of IntersectedOrRecalcu 84 // The validity of IntersectedOrRecalculated depends on 'recalculated'
85 // a) if latter is false, then Intersec 85 // a) if latter is false, then IntersectedOrRecalculated is invalid.
86 // b) if latter is true, then Intersec 86 // b) if latter is true, then IntersectedOrRecalculated is
87 // the new endpoint, due to a re-int 87 // the new endpoint, due to a re-integration.
88 // ------------------------------------------- 88 // --------------------------------------------------------------------------
89 // NOTE: implementation taken from G4Propagato 89 // NOTE: implementation taken from G4PropagatorInField
90 // New second order locator is added 90 // New second order locator is added
91 // 91 //
92 G4bool G4BrentLocator::EstimateIntersectionPoi 92 G4bool G4BrentLocator::EstimateIntersectionPoint(
93 const G4FieldTrack& CurveStart 93 const G4FieldTrack& CurveStartPointVelocity, // A
94 const G4FieldTrack& CurveEndPo 94 const G4FieldTrack& CurveEndPointVelocity, // B
95 const G4ThreeVector& TrialPoint 95 const G4ThreeVector& TrialPoint, // E
96 G4FieldTrack& Intersecte 96 G4FieldTrack& IntersectedOrRecalculatedFT, // Output
97 G4bool& recalculat 97 G4bool& recalculatedEndPoint, // Out
98 G4double& fPreviousS 98 G4double& fPreviousSafety, // In/Out
99 G4ThreeVector& fPreviousS 99 G4ThreeVector& fPreviousSftOrigin) // In/Out
100 100
101 { 101 {
102 // Find Intersection Point ( A, B, E ) of t 102 // Find Intersection Point ( A, B, E ) of true path AB - start at E.
103 103
104 G4bool found_approximate_intersection = fals 104 G4bool found_approximate_intersection = false;
105 G4bool there_is_no_intersection = fals 105 G4bool there_is_no_intersection = false;
106 106
107 G4FieldTrack CurrentA_PointVelocity = Curve 107 G4FieldTrack CurrentA_PointVelocity = CurveStartPointVelocity;
108 G4FieldTrack CurrentB_PointVelocity = Curve 108 G4FieldTrack CurrentB_PointVelocity = CurveEndPointVelocity;
109 G4ThreeVector CurrentE_Point = TrialPoint; 109 G4ThreeVector CurrentE_Point = TrialPoint;
110 G4bool validNormalAtE = false; 110 G4bool validNormalAtE = false;
111 G4ThreeVector NormalAtEntry; 111 G4ThreeVector NormalAtEntry;
112 112
113 G4FieldTrack ApproxIntersecPointV(CurveEndP 113 G4FieldTrack ApproxIntersecPointV(CurveEndPointVelocity); // FT-Def-Construct
114 G4double NewSafety = 0.0; 114 G4double NewSafety = 0.0;
115 G4bool last_AF_intersection = false; 115 G4bool last_AF_intersection = false;
116 116
117 // G4bool final_section= true; // Shows whe 117 // G4bool final_section= true; // Shows whether current section is last
118 // (i.e. B=f 118 // (i.e. B=full end)
119 G4bool first_section = true; 119 G4bool first_section = true;
120 recalculatedEndPoint = false; 120 recalculatedEndPoint = false;
121 121
122 G4bool restoredFullEndpoint = false; 122 G4bool restoredFullEndpoint = false;
123 123
124 G4long oldprc; // cout, cerr precision << 124 G4int oldprc; // cout, cerr precision
125 G4int substep_no = 0; 125 G4int substep_no = 0;
126 126
127 // Limits for substep number 127 // Limits for substep number
128 // 128 //
129 const G4int max_substeps= 10000; // Test 129 const G4int max_substeps= 10000; // Test 120 (old value 100 )
130 const G4int warn_substeps= 1000; // 130 const G4int warn_substeps= 1000; // 100
131 131
132 // Statistics for substeps 132 // Statistics for substeps
133 // 133 //
134 static G4ThreadLocal G4int max_no_seen= -1; 134 static G4ThreadLocal G4int max_no_seen= -1;
135 135
136 // Counter for restarting Bintermed 136 // Counter for restarting Bintermed
137 // 137 //
138 G4int restartB = 0; 138 G4int restartB = 0;
139 139
140 //------------------------------------------ 140 //--------------------------------------------------------------------------
141 // Algorithm for the case if progress in fo 141 // Algorithm for the case if progress in founding intersection is too slow.
142 // Process is defined too slow if after N=p 142 // Process is defined too slow if after N=param_substeps advances on the
143 // path, it will be only 'fraction_done' of 143 // path, it will be only 'fraction_done' of the total length.
144 // In this case the remaining length is div 144 // In this case the remaining length is divided in two half and
145 // the loop is restarted for each half. 145 // the loop is restarted for each half.
146 // If progress is still too slow, the divis 146 // If progress is still too slow, the division in two halfs continue
147 // until 'max_depth'. 147 // until 'max_depth'.
148 //------------------------------------------ 148 //--------------------------------------------------------------------------
149 149
150 const G4int param_substeps = 50; // Test val 150 const G4int param_substeps = 50; // Test value for the maximum number
151 // of subst 151 // of substeps
152 const G4double fraction_done = 0.3; 152 const G4double fraction_done = 0.3;
153 153
154 G4bool Second_half = false; // First hal 154 G4bool Second_half = false; // First half or second half of divided step
155 155
156 NormalAtEntry = GetSurfaceNormal(CurrentE_Po 156 NormalAtEntry = GetSurfaceNormal(CurrentE_Point, validNormalAtE);
157 157
158 // We need to know this for the 'final_secti 158 // We need to know this for the 'final_section':
159 // real 'final_section' or first half 'final 159 // real 'final_section' or first half 'final_section'
160 // In algorithm it is considered that the 'S 160 // In algorithm it is considered that the 'Second_half' is true
161 // and it becomes false only if we are in th 161 // and it becomes false only if we are in the first-half of level
162 // depthness or if we are in the first secti 162 // depthness or if we are in the first section
163 163
164 G4int depth = 0; // Depth counts how many su 164 G4int depth = 0; // Depth counts how many subdivisions of initial step made
165 165
166 #ifdef G4DEBUG_FIELD 166 #ifdef G4DEBUG_FIELD
167 const G4double tolerance = 1.0e-8; 167 const G4double tolerance = 1.0e-8;
168 G4ThreeVector StartPosition = CurveStartPoi 168 G4ThreeVector StartPosition = CurveStartPointVelocity.GetPosition();
169 if( (TrialPoint - StartPosition).mag() < tol 169 if( (TrialPoint - StartPosition).mag() < tolerance * CLHEP::mm )
170 { 170 {
171 G4Exception("G4BrentLocator::EstimateInte 171 G4Exception("G4BrentLocator::EstimateIntersectionPoint()",
172 "GeomNav1002", JustWarning, 172 "GeomNav1002", JustWarning,
173 "Intersection point F is exac 173 "Intersection point F is exactly at start point A." );
174 } 174 }
175 #endif 175 #endif
176 176
177 // Intermediates Points on the Track = Subdi 177 // Intermediates Points on the Track = Subdivided Points must be stored.
178 // Give the initial values to 'InterMedFt' 178 // Give the initial values to 'InterMedFt'
179 // Important is 'ptrInterMedFT[0]', it saves 179 // Important is 'ptrInterMedFT[0]', it saves the 'EndCurvePoint'
180 // 180 //
181 *ptrInterMedFT[0] = CurveEndPointVelocity; 181 *ptrInterMedFT[0] = CurveEndPointVelocity;
182 for (auto idepth=1; idepth<max_depth+1; ++id 182 for (auto idepth=1; idepth<max_depth+1; ++idepth )
183 { 183 {
184 *ptrInterMedFT[idepth] = CurveStartPointVe 184 *ptrInterMedFT[idepth] = CurveStartPointVelocity;
185 } 185 }
186 186
187 //Final_section boolean store 187 //Final_section boolean store
188 G4bool fin_section_depth[max_depth]; 188 G4bool fin_section_depth[max_depth];
189 for (bool & idepth : fin_section_depth) << 189 for (auto idepth=0; idepth<max_depth; ++idepth )
190 { 190 {
191 idepth = true; << 191 fin_section_depth[idepth] = true;
192 } 192 }
193 193
194 // 'SubStartPoint' is needed to calculate th 194 // 'SubStartPoint' is needed to calculate the length of the divided step
195 // 195 //
196 G4FieldTrack SubStart_PointVelocity = CurveS 196 G4FieldTrack SubStart_PointVelocity = CurveStartPointVelocity;
197 197
198 do // Loop checking, 07.10.2016, J.Apostol 198 do // Loop checking, 07.10.2016, J.Apostolakis
199 { 199 {
200 G4int substep_no_p = 0; 200 G4int substep_no_p = 0;
201 G4bool sub_final_section = false; // the s 201 G4bool sub_final_section = false; // the same as final_section,
202 // but f 202 // but for 'sub_section'
203 SubStart_PointVelocity = CurrentA_PointVel 203 SubStart_PointVelocity = CurrentA_PointVelocity;
204 204
205 do // Loop checking, 07.10.2016, J.Apost 205 do // Loop checking, 07.10.2016, J.Apostolakis
206 { // REPEAT param 206 { // REPEAT param
207 G4ThreeVector Point_A = CurrentA_PointVe 207 G4ThreeVector Point_A = CurrentA_PointVelocity.GetPosition();
208 G4ThreeVector Point_B = CurrentB_PointVe 208 G4ThreeVector Point_B = CurrentB_PointVelocity.GetPosition();
209 209
210 // F = a point on true AB path close to 210 // F = a point on true AB path close to point E
211 // (the closest if possible) 211 // (the closest if possible)
212 // 212 //
213 if(substep_no_p==0) 213 if(substep_no_p==0)
214 { 214 {
215 ApproxIntersecPointV = GetChordFinderF 215 ApproxIntersecPointV = GetChordFinderFor()
216 ->ApproxCurvePo 216 ->ApproxCurvePointV( CurrentA_PointVelocity,
217 217 CurrentB_PointVelocity,
218 218 CurrentE_Point,
219 219 GetEpsilonStepFor());
220 // The above method is the key & mo 220 // The above method is the key & most intuitive part ...
221 } 221 }
222 #ifdef G4DEBUG_FIELD 222 #ifdef G4DEBUG_FIELD
223 if( ApproxIntersecPointV.GetCurveLength( 223 if( ApproxIntersecPointV.GetCurveLength() >
224 CurrentB_PointVelocity.GetCurveLengt 224 CurrentB_PointVelocity.GetCurveLength() * (1.0 + tolerance) )
225 { 225 {
226 G4Exception("G4BrentLocator::EstimateI 226 G4Exception("G4BrentLocator::EstimateIntersectionPoint()",
227 "GeomNav0003", FatalExcept 227 "GeomNav0003", FatalException,
228 "Intermediate F point is p 228 "Intermediate F point is past end B point" );
229 } 229 }
230 #endif 230 #endif
231 231
232 G4ThreeVector CurrentF_Point = ApproxInt 232 G4ThreeVector CurrentF_Point = ApproxIntersecPointV.GetPosition();
233 233
234 // First check whether EF is small - the 234 // First check whether EF is small - then F is a good approx. point
235 // Calculate the length and direction of 235 // Calculate the length and direction of the chord AF
236 // 236 //
237 G4ThreeVector ChordEF_Vector = CurrentF 237 G4ThreeVector ChordEF_Vector = CurrentF_Point - CurrentE_Point;
238 G4ThreeVector NewMomentumDir = ApproxIn 238 G4ThreeVector NewMomentumDir = ApproxIntersecPointV.GetMomentumDir();
239 G4double MomDir_dot_Norm = NewMome 239 G4double MomDir_dot_Norm = NewMomentumDir.dot( NormalAtEntry ) ;
240 240
241 #ifdef G4DEBUG_FIELD 241 #ifdef G4DEBUG_FIELD
242 G4ThreeVector ChordAB = Point_B - Point 242 G4ThreeVector ChordAB = Point_B - Point_A;
243 243
244 G4VIntersectionLocator::ReportTrialStep( 244 G4VIntersectionLocator::ReportTrialStep( substep_no, ChordAB,
245 ChordEF_Vector, NewMomentumDir, 245 ChordEF_Vector, NewMomentumDir, NormalAtEntry, validNormalAtE );
246 #endif 246 #endif
247 247
248 G4bool adequate_angle; 248 G4bool adequate_angle;
249 adequate_angle = ( MomDir_dot_Norm >= 0 249 adequate_angle = ( MomDir_dot_Norm >= 0.0 ) // Can use -epsilon instead.
250 || (! validNormalAtE ); 250 || (! validNormalAtE ); // Makes criterion invalid
251 G4double EF_dist2 = ChordEF_Vector.mag2( 251 G4double EF_dist2 = ChordEF_Vector.mag2();
252 if ( ( EF_dist2 <= sqr(fiDeltaIntersecti 252 if ( ( EF_dist2 <= sqr(fiDeltaIntersection) && ( adequate_angle ) )
253 || ( EF_dist2 <= kCarTolerance*kCarTol 253 || ( EF_dist2 <= kCarTolerance*kCarTolerance ) )
254 { 254 {
255 found_approximate_intersection = true; 255 found_approximate_intersection = true;
256 256
257 // Create the "point" return value 257 // Create the "point" return value
258 // 258 //
259 IntersectedOrRecalculatedFT = ApproxIn 259 IntersectedOrRecalculatedFT = ApproxIntersecPointV;
260 IntersectedOrRecalculatedFT.SetPositio 260 IntersectedOrRecalculatedFT.SetPosition( CurrentE_Point );
261 261
262 if ( GetAdjustementOfFoundIntersection 262 if ( GetAdjustementOfFoundIntersection() )
263 { 263 {
264 // Try to Get Correction of Intersec 264 // Try to Get Correction of IntersectionPoint using SurfaceNormal()
265 // 265 //
266 G4ThreeVector IP; 266 G4ThreeVector IP;
267 G4ThreeVector MomentumDir=ApproxInte 267 G4ThreeVector MomentumDir=ApproxIntersecPointV.GetMomentumDirection();
268 G4bool goodCorrection = AdjustmentOf 268 G4bool goodCorrection = AdjustmentOfFoundIntersection( Point_A,
269 CurrentE_P 269 CurrentE_Point, CurrentF_Point, MomentumDir,
270 last_AF_in 270 last_AF_intersection, IP, NewSafety,
271 fPreviousS 271 fPreviousSafety, fPreviousSftOrigin );
272 if ( goodCorrection ) 272 if ( goodCorrection )
273 { 273 {
274 IntersectedOrRecalculatedFT = Appr 274 IntersectedOrRecalculatedFT = ApproxIntersecPointV;
275 IntersectedOrRecalculatedFT.SetPos 275 IntersectedOrRecalculatedFT.SetPosition(IP);
276 } 276 }
277 } 277 }
278 278
279 // Note: in order to return a point on 279 // Note: in order to return a point on the boundary,
280 // we must return E. But it is F 280 // we must return E. But it is F on the curve.
281 // So we must "cheat": we are us 281 // So we must "cheat": we are using the position at point E
282 // and the velocity at point F ! 282 // and the velocity at point F !!!
283 // 283 //
284 // This must limit the length we can a 284 // This must limit the length we can allow for displacement!
285 } 285 }
286 else // E is NOT close enough to the cu 286 else // E is NOT close enough to the curve (ie point F)
287 { 287 {
288 // Check whether any volumes are encou 288 // Check whether any volumes are encountered by the chord AF
289 // ----------------------------------- 289 // ---------------------------------------------------------
290 // First relocate to restore any Voxel 290 // First relocate to restore any Voxel etc information
291 // in the Navigator before calling Com 291 // in the Navigator before calling ComputeStep()
292 // 292 //
293 GetNavigatorFor()->LocateGlobalPointWi 293 GetNavigatorFor()->LocateGlobalPointWithinVolume( Point_A );
294 294
295 G4ThreeVector PointG; // Candidate i 295 G4ThreeVector PointG; // Candidate intersection point
296 G4double stepLengthAF; 296 G4double stepLengthAF;
297 G4bool usedNavigatorAF = false; 297 G4bool usedNavigatorAF = false;
298 G4bool Intersects_AF = IntersectChord( 298 G4bool Intersects_AF = IntersectChord( Point_A, CurrentF_Point,
299 299 NewSafety,fPreviousSafety,
300 300 fPreviousSftOrigin,
301 301 stepLengthAF,
302 302 PointG,
303 303 &usedNavigatorAF);
304 last_AF_intersection = Intersects_AF; 304 last_AF_intersection = Intersects_AF;
305 if( Intersects_AF ) 305 if( Intersects_AF )
306 { 306 {
307 // G is our new Candidate for the in 307 // G is our new Candidate for the intersection point.
308 // It replaces "E" and we will repe 308 // It replaces "E" and we will repeat the test to see if
309 // it is a good enough approximate p 309 // it is a good enough approximate point for us.
310 // B <- F 310 // B <- F
311 // E <- G 311 // E <- G
312 // 312 //
313 G4FieldTrack EndPoint = ApproxInters 313 G4FieldTrack EndPoint = ApproxIntersecPointV;
314 ApproxIntersecPointV = GetChordFinde 314 ApproxIntersecPointV = GetChordFinderFor()->ApproxCurvePointS(
315 CurrentA_Poin 315 CurrentA_PointVelocity, CurrentB_PointVelocity,
316 EndPoint,Curr 316 EndPoint,CurrentE_Point, CurrentF_Point,PointG,
317 true, GetEpsi 317 true, GetEpsilonStepFor() );
318 CurrentB_PointVelocity = EndPoint; 318 CurrentB_PointVelocity = EndPoint;
319 CurrentE_Point = PointG; 319 CurrentE_Point = PointG;
320 320
321 // Need to recalculate the Exit Norm 321 // Need to recalculate the Exit Normal at the new PointG
322 // Know that a call was made to Navi 322 // Know that a call was made to Navigator::ComputeStep in
323 // IntersectChord above. 323 // IntersectChord above.
324 // 324 //
325 G4bool validNormalLast; 325 G4bool validNormalLast;
326 NormalAtEntry = GetSurfaceNormal( P 326 NormalAtEntry = GetSurfaceNormal( PointG, validNormalLast );
327 validNormalAtE = validNormalLast; 327 validNormalAtE = validNormalLast;
328 328
329 // By moving point B, must take care 329 // By moving point B, must take care if current
330 // AF has no intersection to try cur 330 // AF has no intersection to try current FB!!
331 // 331 //
332 fin_section_depth[depth] = false; 332 fin_section_depth[depth] = false;
333 #ifdef G4VERBOSE 333 #ifdef G4VERBOSE
334 if( fVerboseLevel > 3 ) 334 if( fVerboseLevel > 3 )
335 { 335 {
336 G4cout << "G4PiF::LI> Investigatin 336 G4cout << "G4PiF::LI> Investigating intermediate point"
337 << " at s=" << ApproxInters 337 << " at s=" << ApproxIntersecPointV.GetCurveLength()
338 << " on way to full s=" 338 << " on way to full s="
339 << CurveEndPointVelocity.Ge 339 << CurveEndPointVelocity.GetCurveLength() << G4endl;
340 } 340 }
341 #endif 341 #endif
342 } 342 }
343 else // not Intersects_AF 343 else // not Intersects_AF
344 { 344 {
345 // In this case: 345 // In this case:
346 // There is NO intersection of AF wi 346 // There is NO intersection of AF with a volume boundary.
347 // We must continue the search in th 347 // We must continue the search in the segment FB!
348 // 348 //
349 GetNavigatorFor()->LocateGlobalPoint 349 GetNavigatorFor()->LocateGlobalPointWithinVolume( CurrentF_Point );
350 350
351 G4double stepLengthFB; 351 G4double stepLengthFB;
352 G4ThreeVector PointH; 352 G4ThreeVector PointH;
353 G4bool usedNavigatorFB = false; 353 G4bool usedNavigatorFB = false;
354 354
355 // Check whether any volumes are enc 355 // Check whether any volumes are encountered by the chord FB
356 // --------------------------------- 356 // ---------------------------------------------------------
357 357
358 G4bool Intersects_FB = IntersectChor 358 G4bool Intersects_FB = IntersectChord( CurrentF_Point, Point_B,
359 359 NewSafety,fPreviousSafety,
360 360 fPreviousSftOrigin,
361 361 stepLengthFB,
362 362 PointH,
363 363 &usedNavigatorFB);
364 if( Intersects_FB ) 364 if( Intersects_FB )
365 { 365 {
366 // There is an intersection of FB 366 // There is an intersection of FB with a volume boundary
367 // H <- First Intersection of Chor 367 // H <- First Intersection of Chord FB
368 368
369 // H is our new Candidate for the 369 // H is our new Candidate for the intersection point.
370 // It replaces "E" and we will re 370 // It replaces "E" and we will repeat the test to see if
371 // it is a good enough approximate 371 // it is a good enough approximate point for us.
372 372
373 // Note that F must be in volume v 373 // Note that F must be in volume volA (the same as A)
374 // (otherwise AF would meet a volu 374 // (otherwise AF would meet a volume boundary!)
375 // A <- F 375 // A <- F
376 // E <- H 376 // E <- H
377 // 377 //
378 G4FieldTrack InterMed = ApproxInte 378 G4FieldTrack InterMed = ApproxIntersecPointV;
379 ApproxIntersecPointV = GetChordFin 379 ApproxIntersecPointV = GetChordFinderFor()->ApproxCurvePointS(
380 CurrentA_PointVeloci 380 CurrentA_PointVelocity,CurrentB_PointVelocity,
381 InterMed,CurrentE_Po 381 InterMed,CurrentE_Point,CurrentF_Point,PointH,
382 false,GetEpsilonStep 382 false,GetEpsilonStepFor());
383 CurrentA_PointVelocity = InterMed; 383 CurrentA_PointVelocity = InterMed;
384 CurrentE_Point = PointH; 384 CurrentE_Point = PointH;
385 385
386 // Need to recalculate the Exit No 386 // Need to recalculate the Exit Normal at the new PointG
387 // 387 //
388 G4bool validNormalLast; 388 G4bool validNormalLast;
389 NormalAtEntry = GetSurfaceNormal( 389 NormalAtEntry = GetSurfaceNormal( PointH, validNormalLast );
390 validNormalAtE = validNormalLast; 390 validNormalAtE = validNormalLast;
391 } 391 }
392 else // not Intersects_FB 392 else // not Intersects_FB
393 { 393 {
394 // There is NO intersection of FB 394 // There is NO intersection of FB with a volume boundary
395 395
396 if( fin_section_depth[depth] ) 396 if( fin_section_depth[depth] )
397 { 397 {
398 // If B is the original endpoint 398 // If B is the original endpoint, this means that whatever
399 // volume(s) intersected the ori 399 // volume(s) intersected the original chord, none touch the
400 // smaller chords we have used. 400 // smaller chords we have used.
401 // The value of 'IntersectedOrRe 401 // The value of 'IntersectedOrRecalculatedFT' returned is
402 // likely not valid 402 // likely not valid
403 403
404 // Check on real final_section o 404 // Check on real final_section or SubEndSection
405 // 405 //
406 if( ((Second_half)&&(depth==0)) 406 if( ((Second_half)&&(depth==0)) || (first_section) )
407 { 407 {
408 there_is_no_intersection = tru 408 there_is_no_intersection = true; // real final_section
409 } 409 }
410 else 410 else
411 { 411 {
412 // end of subsection, not real 412 // end of subsection, not real final section
413 // exit from the and go to the 413 // exit from the and go to the depth-1 level
414 414
415 substep_no_p = param_substeps+ 415 substep_no_p = param_substeps+2; // exit from the loop
416 416
417 // but 'Second_half' is still 417 // but 'Second_half' is still true because we need to find
418 // the 'CurrentE_point' for th 418 // the 'CurrentE_point' for the next loop
419 // 419 //
420 Second_half = true; 420 Second_half = true;
421 sub_final_section = true; 421 sub_final_section = true;
422 } 422 }
423 } 423 }
424 else 424 else
425 { 425 {
426 if( depth==0 ) 426 if( depth==0 )
427 { 427 {
428 // We must restore the origina 428 // We must restore the original endpoint
429 // 429 //
430 CurrentA_PointVelocity = Curre 430 CurrentA_PointVelocity = CurrentB_PointVelocity; // Got to B
431 CurrentB_PointVelocity = Curve 431 CurrentB_PointVelocity = CurveEndPointVelocity;
432 SubStart_PointVelocity = Curre 432 SubStart_PointVelocity = CurrentA_PointVelocity;
433 ApproxIntersecPointV = GetChor 433 ApproxIntersecPointV = GetChordFinderFor()
434 ->ApproxCurvePo 434 ->ApproxCurvePointV( CurrentA_PointVelocity,
435 435 CurrentB_PointVelocity,
436 436 CurrentE_Point,
437 437 GetEpsilonStepFor());
438 438
439 restoredFullEndpoint = true; 439 restoredFullEndpoint = true;
440 ++restartB; // counter 440 ++restartB; // counter
441 } 441 }
442 else 442 else
443 { 443 {
444 // We must restore the depth e 444 // We must restore the depth endpoint
445 // 445 //
446 CurrentA_PointVelocity = Curre 446 CurrentA_PointVelocity = CurrentB_PointVelocity; // Got to B
447 CurrentB_PointVelocity = *ptr 447 CurrentB_PointVelocity = *ptrInterMedFT[depth];
448 SubStart_PointVelocity = Curre 448 SubStart_PointVelocity = CurrentA_PointVelocity;
449 ApproxIntersecPointV = GetChor 449 ApproxIntersecPointV = GetChordFinderFor()
450 ->ApproxCurvePo 450 ->ApproxCurvePointV( CurrentA_PointVelocity,
451 451 CurrentB_PointVelocity,
452 452 CurrentE_Point,
453 453 GetEpsilonStepFor());
454 restoredFullEndpoint = true; 454 restoredFullEndpoint = true;
455 ++restartB; // counter 455 ++restartB; // counter
456 } 456 }
457 } 457 }
458 } // Endif (Intersects_FB) 458 } // Endif (Intersects_FB)
459 } // Endif (Intersects_AF) 459 } // Endif (Intersects_AF)
460 460
461 // Ensure that the new endpoints are n 461 // Ensure that the new endpoints are not further apart in space
462 // than on the curve due to different 462 // than on the curve due to different errors in the integration
463 // 463 //
464 G4double linDistSq, curveDist; 464 G4double linDistSq, curveDist;
465 linDistSq = ( CurrentB_PointVelocity.G 465 linDistSq = ( CurrentB_PointVelocity.GetPosition()
466 - CurrentA_PointVelocity.G 466 - CurrentA_PointVelocity.GetPosition() ).mag2();
467 curveDist = CurrentB_PointVelocity.Get 467 curveDist = CurrentB_PointVelocity.GetCurveLength()
468 - CurrentA_PointVelocity.G 468 - CurrentA_PointVelocity.GetCurveLength();
469 469
470 // Change this condition for very stri 470 // Change this condition for very strict parameters of propagation
471 // 471 //
472 if( curveDist*curveDist*(1+2* GetEpsil 472 if( curveDist*curveDist*(1+2* GetEpsilonStepFor()) < linDistSq )
473 { 473 {
474 // Re-integrate to obtain a new B 474 // Re-integrate to obtain a new B
475 // 475 //
476 G4FieldTrack newEndPointFT= 476 G4FieldTrack newEndPointFT=
477 ReEstimateEndpoint( CurrentA 477 ReEstimateEndpoint( CurrentA_PointVelocity,
478 CurrentB 478 CurrentB_PointVelocity,
479 linDistS 479 linDistSq, // to avoid recalculation
480 curveDis 480 curveDist );
481 G4FieldTrack oldPointVelB = CurrentB 481 G4FieldTrack oldPointVelB = CurrentB_PointVelocity;
482 CurrentB_PointVelocity = newEndPoint 482 CurrentB_PointVelocity = newEndPointFT;
483 483
484 if ( (fin_section_depth[depth]) 484 if ( (fin_section_depth[depth]) // real final section
485 &&( first_section || ((Second_ha 485 &&( first_section || ((Second_half)&&(depth==0)) ) )
486 { 486 {
487 recalculatedEndPoint = true; 487 recalculatedEndPoint = true;
488 IntersectedOrRecalculatedFT = newE 488 IntersectedOrRecalculatedFT = newEndPointFT;
489 // So that we can return it, if 489 // So that we can return it, if it is the endpoint!
490 } 490 }
491 } 491 }
492 if( curveDist < 0.0 ) 492 if( curveDist < 0.0 )
493 { 493 {
494 fVerboseLevel = 5; // Print out a ma 494 fVerboseLevel = 5; // Print out a maximum of information
495 printStatus( CurrentA_PointVelocity, 495 printStatus( CurrentA_PointVelocity, CurrentB_PointVelocity,
496 -1.0, NewSafety, subst 496 -1.0, NewSafety, substep_no );
497 std::ostringstream message; 497 std::ostringstream message;
498 message << "Error in advancing propa 498 message << "Error in advancing propagation." << G4endl
499 << " Error in advanci 499 << " Error in advancing propagation." << G4endl
500 << " Point A (start) 500 << " Point A (start) is " << CurrentA_PointVelocity
501 << G4endl 501 << G4endl
502 << " Point B (end) 502 << " Point B (end) is " << CurrentB_PointVelocity
503 << G4endl 503 << G4endl
504 << " Curve distance i 504 << " Curve distance is " << curveDist << G4endl
505 << G4endl 505 << G4endl
506 << "The final curve point is 506 << "The final curve point is not further along"
507 << " than the original!" << 507 << " than the original!" << G4endl;
508 508
509 if( recalculatedEndPoint ) 509 if( recalculatedEndPoint )
510 { 510 {
511 message << "Recalculation of EndPo 511 message << "Recalculation of EndPoint was called with fEpsStep= "
512 << GetEpsilonStepFor() << 512 << GetEpsilonStepFor() << G4endl;
513 } 513 }
514 oldprc = G4cerr.precision(20); 514 oldprc = G4cerr.precision(20);
515 message << " Point A (Curve start) 515 message << " Point A (Curve start) is " << CurveStartPointVelocity
516 << G4endl 516 << G4endl
517 << " Point B (Curve end) 517 << " Point B (Curve end) is " << CurveEndPointVelocity
518 << G4endl 518 << G4endl
519 << " Point A (Current start) 519 << " Point A (Current start) is " << CurrentA_PointVelocity
520 << G4endl 520 << G4endl
521 << " Point B (Current end) 521 << " Point B (Current end) is " << CurrentB_PointVelocity
522 << G4endl 522 << G4endl
523 << " Point S (Sub start) 523 << " Point S (Sub start) is " << SubStart_PointVelocity
524 << G4endl 524 << G4endl
525 << " Point E (Trial Point) 525 << " Point E (Trial Point) is " << CurrentE_Point
526 << G4endl 526 << G4endl
527 << " Old Point F(Intersectio 527 << " Old Point F(Intersection) is " << CurrentF_Point
528 << G4endl 528 << G4endl
529 << " New Point F(Intersectio 529 << " New Point F(Intersection) is " << ApproxIntersecPointV
530 << G4endl 530 << G4endl
531 << " LocateIntersecti 531 << " LocateIntersection parameters are : Substep no= "
532 << substep_no << G4endl 532 << substep_no << G4endl
533 << " Substep depth no 533 << " Substep depth no= "<< substep_no_p << " Depth= "
534 << depth << G4endl 534 << depth << G4endl
535 << " Restarted no= "< 535 << " Restarted no= "<< restartB << " Epsilon= "
536 << GetEpsilonStepFor() <<" D 536 << GetEpsilonStepFor() <<" DeltaInters= "
537 << GetDeltaIntersectionFor() 537 << GetDeltaIntersectionFor();
538 G4cerr.precision( oldprc ); 538 G4cerr.precision( oldprc );
539 539
540 G4Exception("G4BrentLocator::Estimat 540 G4Exception("G4BrentLocator::EstimateIntersectionPoint()",
541 "GeomNav0003", FatalExce 541 "GeomNav0003", FatalException, message);
542 } 542 }
543 543
544 if( restoredFullEndpoint ) 544 if( restoredFullEndpoint )
545 { 545 {
546 fin_section_depth[depth] = restoredF 546 fin_section_depth[depth] = restoredFullEndpoint;
547 restoredFullEndpoint = false; 547 restoredFullEndpoint = false;
548 } 548 }
549 } // EndIf ( E is close enough to the cu 549 } // EndIf ( E is close enough to the curve, ie point F. )
550 // tests ChordAF_Vector.mag() <= maxim 550 // tests ChordAF_Vector.mag() <= maximum_lateral_displacement
551 551
552 #ifdef G4DEBUG_LOCATE_INTERSECTION 552 #ifdef G4DEBUG_LOCATE_INTERSECTION
553 G4int trigger_substepno_print= warn_subs 553 G4int trigger_substepno_print= warn_substeps - 20 ;
554 554
555 if( substep_no >= trigger_substepno_prin 555 if( substep_no >= trigger_substepno_print )
556 { 556 {
557 G4cout << "Difficulty in converging in 557 G4cout << "Difficulty in converging in "
558 << "G4BrentLocator::EstimateInt 558 << "G4BrentLocator::EstimateIntersectionPoint()"
559 << G4endl 559 << G4endl
560 << " Substep no = " << subst 560 << " Substep no = " << substep_no << G4endl;
561 if( substep_no == trigger_substepno_pr 561 if( substep_no == trigger_substepno_print )
562 { 562 {
563 printStatus( CurveStartPointVelocity 563 printStatus( CurveStartPointVelocity, CurveEndPointVelocity,
564 -1.0, NewSafety, 0); 564 -1.0, NewSafety, 0);
565 } 565 }
566 G4cout << " State of point A: "; 566 G4cout << " State of point A: ";
567 printStatus( CurrentA_PointVelocity, C 567 printStatus( CurrentA_PointVelocity, CurrentA_PointVelocity,
568 -1.0, NewSafety, substep_ 568 -1.0, NewSafety, substep_no-1, 0);
569 G4cout << " State of point B: "; 569 G4cout << " State of point B: ";
570 printStatus( CurrentA_PointVelocity, C 570 printStatus( CurrentA_PointVelocity, CurrentB_PointVelocity,
571 -1.0, NewSafety, substep_ 571 -1.0, NewSafety, substep_no);
572 } 572 }
573 #endif 573 #endif
574 ++substep_no; 574 ++substep_no;
575 ++substep_no_p; 575 ++substep_no_p;
576 576
577 } while ( ( ! found_approximate_intersect 577 } while ( ( ! found_approximate_intersection )
578 && ( ! there_is_no_intersection ) 578 && ( ! there_is_no_intersection )
579 && ( substep_no_p <= param_substep 579 && ( substep_no_p <= param_substeps) ); // UNTIL found or
580 580 // failed param substep
581 first_section = false; 581 first_section = false;
582 582
583 if( (!found_approximate_intersection) && ( 583 if( (!found_approximate_intersection) && (!there_is_no_intersection) )
584 { 584 {
585 G4double did_len = std::abs( CurrentA_Po 585 G4double did_len = std::abs( CurrentA_PointVelocity.GetCurveLength()
586 - SubStart_PointVelocit 586 - SubStart_PointVelocity.GetCurveLength());
587 G4double all_len = std::abs( CurrentB_Po 587 G4double all_len = std::abs( CurrentB_PointVelocity.GetCurveLength()
588 - SubStart_PointVelocit 588 - SubStart_PointVelocity.GetCurveLength());
589 589
590 G4double stepLengthAB; 590 G4double stepLengthAB;
591 G4ThreeVector PointGe; 591 G4ThreeVector PointGe;
592 592
593 // Check if progress is too slow and if 593 // Check if progress is too slow and if it possible to go deeper,
594 // then halve the step if so 594 // then halve the step if so
595 // 595 //
596 if ( ( did_len < fraction_done*all_len ) 596 if ( ( did_len < fraction_done*all_len )
597 && (depth < max_depth) && (!sub_final_ 597 && (depth < max_depth) && (!sub_final_section) )
598 { 598 {
599 Second_half=false; 599 Second_half=false;
600 ++depth; 600 ++depth;
601 601
602 G4double Sub_len = (all_len-did_len)/( 602 G4double Sub_len = (all_len-did_len)/(2.);
603 G4FieldTrack start = CurrentA_PointVel 603 G4FieldTrack start = CurrentA_PointVelocity;
604 auto integrDriver = 604 auto integrDriver =
605 GetChordFinderFor()-> 605 GetChordFinderFor()->GetIntegrationDriver();
606 integrDriver->AccurateAdvance(start, S 606 integrDriver->AccurateAdvance(start, Sub_len, GetEpsilonStepFor());
607 *ptrInterMedFT[depth] = start; 607 *ptrInterMedFT[depth] = start;
608 CurrentB_PointVelocity = *ptrInterMedF 608 CurrentB_PointVelocity = *ptrInterMedFT[depth];
609 609
610 // Adjust 'SubStartPoint' to calculate 610 // Adjust 'SubStartPoint' to calculate the 'did_length' in next loop
611 // 611 //
612 SubStart_PointVelocity = CurrentA_Poin 612 SubStart_PointVelocity = CurrentA_PointVelocity;
613 613
614 // Find new trial intersection point n 614 // Find new trial intersection point needed at start of the loop
615 // 615 //
616 G4ThreeVector Point_A = CurrentA_Point 616 G4ThreeVector Point_A = CurrentA_PointVelocity.GetPosition();
617 G4ThreeVector SubE_point = CurrentB_Po 617 G4ThreeVector SubE_point = CurrentB_PointVelocity.GetPosition();
618 618
619 GetNavigatorFor()->LocateGlobalPointWi 619 GetNavigatorFor()->LocateGlobalPointWithinVolume(Point_A);
620 G4bool Intersects_AB = IntersectChord( 620 G4bool Intersects_AB = IntersectChord(Point_A, SubE_point,
621 621 NewSafety, fPreviousSafety,
622 622 fPreviousSftOrigin,stepLengthAB,
623 623 PointGe);
624 if( Intersects_AB ) 624 if( Intersects_AB )
625 { 625 {
626 last_AF_intersection = Intersects_AB 626 last_AF_intersection = Intersects_AB;
627 CurrentE_Point = PointGe; 627 CurrentE_Point = PointGe;
628 fin_section_depth[depth] = true; 628 fin_section_depth[depth] = true;
629 629
630 // Need to recalculate the Exit Norm 630 // Need to recalculate the Exit Normal at the new PointG
631 // 631 //
632 G4bool validNormalAB; 632 G4bool validNormalAB;
633 NormalAtEntry = GetSurfaceNormal( Po 633 NormalAtEntry = GetSurfaceNormal( PointGe, validNormalAB );
634 validNormalAtE = validNormalAB; 634 validNormalAtE = validNormalAB;
635 } 635 }
636 else 636 else
637 { 637 {
638 // No intersection found for first p 638 // No intersection found for first part of curve
639 // (CurrentA,InterMedPoint[depth]). 639 // (CurrentA,InterMedPoint[depth]). Go to the second part
640 // 640 //
641 Second_half = true; 641 Second_half = true;
642 } 642 }
643 } // if did_len 643 } // if did_len
644 644
645 if( (Second_half)&&(depth!=0) ) 645 if( (Second_half)&&(depth!=0) )
646 { 646 {
647 // Second part of curve (InterMed[dept 647 // Second part of curve (InterMed[depth],Intermed[depth-1]) )
648 // On the depth-1 level normally we ar 648 // On the depth-1 level normally we are on the 'second_half'
649 649
650 Second_half = true; 650 Second_half = true;
651 651
652 // Find new trial intersection point 652 // Find new trial intersection point needed at start of the loop
653 // 653 //
654 SubStart_PointVelocity = *ptrInterMedF 654 SubStart_PointVelocity = *ptrInterMedFT[depth];
655 CurrentA_PointVelocity = *ptrInterMedF 655 CurrentA_PointVelocity = *ptrInterMedFT[depth];
656 CurrentB_PointVelocity = *ptrInterMedF 656 CurrentB_PointVelocity = *ptrInterMedFT[depth-1];
657 // Ensure that the new endpoints are 657 // Ensure that the new endpoints are not further apart in space
658 // than on the curve due to different 658 // than on the curve due to different errors in the integration
659 // 659 //
660 G4double linDistSq, curveDist; 660 G4double linDistSq, curveDist;
661 linDistSq = ( CurrentB_PointVelocity.G 661 linDistSq = ( CurrentB_PointVelocity.GetPosition()
662 - CurrentA_PointVelocity.G 662 - CurrentA_PointVelocity.GetPosition() ).mag2();
663 curveDist = CurrentB_PointVelocity.Get 663 curveDist = CurrentB_PointVelocity.GetCurveLength()
664 - CurrentA_PointVelocity.G 664 - CurrentA_PointVelocity.GetCurveLength();
665 if( curveDist*curveDist*(1+2*GetEpsilo 665 if( curveDist*curveDist*(1+2*GetEpsilonStepFor() ) < linDistSq )
666 { 666 {
667 // Re-integrate to obtain a new B 667 // Re-integrate to obtain a new B
668 // 668 //
669 G4FieldTrack newEndPointFT = 669 G4FieldTrack newEndPointFT =
670 ReEstimateEndpoint( CurrentA 670 ReEstimateEndpoint( CurrentA_PointVelocity,
671 CurrentB 671 CurrentB_PointVelocity,
672 linDistS 672 linDistSq, // to avoid recalculation
673 curveDis 673 curveDist );
674 G4FieldTrack oldPointVelB = CurrentB 674 G4FieldTrack oldPointVelB = CurrentB_PointVelocity;
675 CurrentB_PointVelocity = newEndPoint 675 CurrentB_PointVelocity = newEndPointFT;
676 if ( depth==1 ) 676 if ( depth==1 )
677 { 677 {
678 recalculatedEndPoint = true; 678 recalculatedEndPoint = true;
679 IntersectedOrRecalculatedFT = newE 679 IntersectedOrRecalculatedFT = newEndPointFT;
680 // So that we can return it, if it 680 // So that we can return it, if it is the endpoint!
681 } 681 }
682 } 682 }
683 683
684 684
685 G4ThreeVector Point_A = CurrentA_Po 685 G4ThreeVector Point_A = CurrentA_PointVelocity.GetPosition();
686 G4ThreeVector SubE_point = CurrentB_Po 686 G4ThreeVector SubE_point = CurrentB_PointVelocity.GetPosition();
687 GetNavigatorFor()->LocateGlobalPointWi 687 GetNavigatorFor()->LocateGlobalPointWithinVolume(Point_A);
688 G4bool Intersects_AB = IntersectChord( 688 G4bool Intersects_AB = IntersectChord(Point_A, SubE_point, NewSafety,
689 689 fPreviousSafety,
690 690 fPreviousSftOrigin,stepLengthAB, PointGe);
691 if( Intersects_AB ) 691 if( Intersects_AB )
692 { 692 {
693 last_AF_intersection = Intersects_AB 693 last_AF_intersection = Intersects_AB;
694 CurrentE_Point = PointGe; 694 CurrentE_Point = PointGe;
695 695
696 G4bool validNormalAB; 696 G4bool validNormalAB;
697 NormalAtEntry = GetSurfaceNormal( P 697 NormalAtEntry = GetSurfaceNormal( PointGe, validNormalAB );
698 validNormalAtE = validNormalAB; 698 validNormalAtE = validNormalAB;
699 } 699 }
700 700
701 depth--; 701 depth--;
702 fin_section_depth[depth]=true; 702 fin_section_depth[depth]=true;
703 } 703 }
704 } // if(!found_aproximate_intersection) 704 } // if(!found_aproximate_intersection)
705 705
706 } while ( ( ! found_approximate_intersection 706 } while ( ( ! found_approximate_intersection )
707 && ( ! there_is_no_intersection ) 707 && ( ! there_is_no_intersection )
708 && ( substep_no <= max_substeps) ) 708 && ( substep_no <= max_substeps) ); // UNTIL found or failed
709 709
710 if( substep_no > max_no_seen ) 710 if( substep_no > max_no_seen )
711 { 711 {
712 max_no_seen = substep_no; 712 max_no_seen = substep_no;
713 #ifdef G4DEBUG_LOCATE_INTERSECTION 713 #ifdef G4DEBUG_LOCATE_INTERSECTION
714 if( max_no_seen > warn_substeps ) 714 if( max_no_seen > warn_substeps )
715 { 715 {
716 trigger_substepno_print = max_no_seen-20 716 trigger_substepno_print = max_no_seen-20; // Want to see last 20 steps
717 } 717 }
718 #endif 718 #endif
719 } 719 }
720 720
721 if( ( substep_no >= max_substeps) 721 if( ( substep_no >= max_substeps)
722 && !there_is_no_intersection 722 && !there_is_no_intersection
723 && !found_approximate_intersection ) 723 && !found_approximate_intersection )
724 { 724 {
725 G4cout << "ERROR - G4BrentLocator::Estimat 725 G4cout << "ERROR - G4BrentLocator::EstimateIntersectionPoint()" << G4endl
726 << " Start and end-point of 726 << " Start and end-point of requested Step:" << G4endl;
727 printStatus( CurveStartPointVelocity, Curv 727 printStatus( CurveStartPointVelocity, CurveEndPointVelocity,
728 -1.0, NewSafety, 0); 728 -1.0, NewSafety, 0);
729 G4cout << " Start and end-point of 729 G4cout << " Start and end-point of current Sub-Step:" << G4endl;
730 printStatus( CurrentA_PointVelocity, Curre 730 printStatus( CurrentA_PointVelocity, CurrentA_PointVelocity,
731 -1.0, NewSafety, substep_no-1 731 -1.0, NewSafety, substep_no-1);
732 printStatus( CurrentA_PointVelocity, Curre 732 printStatus( CurrentA_PointVelocity, CurrentB_PointVelocity,
733 -1.0, NewSafety, substep_no); 733 -1.0, NewSafety, substep_no);
734 std::ostringstream message; 734 std::ostringstream message;
735 message << "Too many substeps!" << G4endl 735 message << "Too many substeps!" << G4endl
736 << " Convergence is requi 736 << " Convergence is requiring too many substeps: "
737 << substep_no << G4endl 737 << substep_no << G4endl
738 << " Abandoning effort to 738 << " Abandoning effort to intersect. " << G4endl
739 << " Found intersection = 739 << " Found intersection = "
740 << found_approximate_intersection 740 << found_approximate_intersection << G4endl
741 << " Intersection exists 741 << " Intersection exists = "
742 << !there_is_no_intersection << G4 742 << !there_is_no_intersection << G4endl;
743 oldprc = G4cout.precision( 10 ); 743 oldprc = G4cout.precision( 10 );
744 G4double done_len = CurrentA_PointVelocity 744 G4double done_len = CurrentA_PointVelocity.GetCurveLength();
745 G4double full_len = CurveEndPointVelocity. 745 G4double full_len = CurveEndPointVelocity.GetCurveLength();
746 message << " Undertaken only length 746 message << " Undertaken only length: " << done_len
747 << " out of " << full_len << " req 747 << " out of " << full_len << " required." << G4endl
748 << " Remaining length = " < 748 << " Remaining length = " << full_len - done_len;
749 G4cout.precision( oldprc ); 749 G4cout.precision( oldprc );
750 750
751 G4Exception("G4BrentLocator::EstimateInter 751 G4Exception("G4BrentLocator::EstimateIntersectionPoint()",
752 "GeomNav0003", FatalException, 752 "GeomNav0003", FatalException, message);
753 } 753 }
754 else if( substep_no >= warn_substeps ) 754 else if( substep_no >= warn_substeps )
755 { 755 {
756 oldprc = G4cout.precision( 10 ); << 756 oldprc= G4cout.precision( 10 );
757 std::ostringstream message; 757 std::ostringstream message;
758 message << "Many substeps while trying to 758 message << "Many substeps while trying to locate intersection."
759 << G4endl 759 << G4endl
760 << " Undertaken length: " 760 << " Undertaken length: "
761 << CurrentB_PointVelocity.GetCurve 761 << CurrentB_PointVelocity.GetCurveLength()
762 << " - Needed: " << substep_no << 762 << " - Needed: " << substep_no << " substeps." << G4endl
763 << " Warning level = " << 763 << " Warning level = " << warn_substeps
764 << " and maximum substeps = " << m 764 << " and maximum substeps = " << max_substeps;
765 G4Exception("G4BrentLocator::EstimateInter 765 G4Exception("G4BrentLocator::EstimateIntersectionPoint()",
766 "GeomNav1002", JustWarning, me 766 "GeomNav1002", JustWarning, message);
767 G4cout.precision( oldprc ); 767 G4cout.precision( oldprc );
768 } 768 }
769 return !there_is_no_intersection; // Succe 769 return !there_is_no_intersection; // Success or failure
770 } 770 }
771 771