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25 // 25 //
26 // G4Navigator << 26 //
>> 27 // $Id: G4Navigator.hh,v 1.23 2007/05/11 13:43:59 gcosmo Exp $
>> 28 // GEANT4 tag $Name: geant4-09-00 $
>> 29 //
>> 30 //
>> 31 // class G4Navigator
27 // 32 //
28 // Class description: 33 // Class description:
29 // 34 //
30 // A class for use by the tracking management, 35 // A class for use by the tracking management, able to obtain/calculate
31 // dynamic tracking time information such as t 36 // dynamic tracking time information such as the distance to the next volume,
32 // or to find the physical volume containing a 37 // or to find the physical volume containing a given point in the world
33 // reference system. The navigator maintains a 38 // reference system. The navigator maintains a transformation history and
34 // other information to optimise the tracking 39 // other information to optimise the tracking time performance.
35 << 40 //
>> 41 // History:
36 // - Created. 42 // - Created. Paul Kent, Jul 95/96
37 // - Made Navigator Abstract <<
38 // - Added check mode <<
39 // - Zero step protections 43 // - Zero step protections J.A. / G.C., Nov 2004
40 // ------------------------------------------- << 44 // - Added check mode G. Cosmo, Mar 2004
>> 45 // - Made Navigator Abstract G. Cosmo, Nov 2003
>> 46 // *********************************************************************
>> 47
41 #ifndef G4NAVIGATOR_HH 48 #ifndef G4NAVIGATOR_HH
42 #define G4NAVIGATOR_HH 1 << 49 #define G4NAVIGATOR_HH
43 50
44 #include "geomdefs.hh" 51 #include "geomdefs.hh"
45 52
46 #include "G4ThreeVector.hh" 53 #include "G4ThreeVector.hh"
47 #include "G4AffineTransform.hh" 54 #include "G4AffineTransform.hh"
48 #include "G4RotationMatrix.hh" 55 #include "G4RotationMatrix.hh"
49 56
50 #include "G4LogicalVolume.hh" // U 57 #include "G4LogicalVolume.hh" // Used in inline methods
>> 58 #include "G4GRSVolume.hh" // " "
>> 59 #include "G4GRSSolid.hh" // " "
51 #include "G4TouchableHandle.hh" // 60 #include "G4TouchableHandle.hh" // " "
>> 61 #include "G4TouchableHistoryHandle.hh"
52 62
53 #include "G4NavigationHistory.hh" 63 #include "G4NavigationHistory.hh"
54 #include "G4NormalNavigation.hh" 64 #include "G4NormalNavigation.hh"
55 #include "G4VoxelNavigation.hh" 65 #include "G4VoxelNavigation.hh"
56 #include "G4ParameterisedNavigation.hh" 66 #include "G4ParameterisedNavigation.hh"
57 #include "G4ReplicaNavigation.hh" 67 #include "G4ReplicaNavigation.hh"
58 #include "G4RegularNavigation.hh" <<
59 #include "G4VExternalNavigation.hh" <<
60 68
61 #include <iostream> 69 #include <iostream>
62 70
63 class G4VPhysicalVolume; 71 class G4VPhysicalVolume;
64 class G4SafetyCalculator; <<
65 72
66 class G4Navigator 73 class G4Navigator
67 { 74 {
68 public: << 75 public: // with description
69 <<
70 friend std::ostream& operator << (std::ost <<
71 76
72 G4Navigator(); << 77 friend std::ostream& operator << (std::ostream &os, const G4Navigator &n);
73 // Constructor - initialisers and setup. <<
74 78
75 G4Navigator(const G4Navigator&) = delete; << 79 G4Navigator();
76 G4Navigator& operator=(const G4Navigator&) << 80 // Constructor - initialisers and setup.
77 // Copy constructor & assignment operato <<
78 <<
79 virtual ~G4Navigator(); <<
80 // Destructor. No actions. <<
81 <<
82 virtual G4double ComputeStep(const G4Three <<
83 const G4Three <<
84 const G4doubl <<
85 G4doubl <<
86 // Calculate the distance to the next bo <<
87 // along the specified NORMALISED vector <<
88 // from the specified point in the globa <<
89 // system. LocateGlobalPointAndSetup or <<
90 // must have been called with the same g <<
91 // The isotropic distance to the nearest <<
92 // calculated (usually an underestimate) <<
93 // proposed Step length is used to avoid <<
94 // calculations: if it can be determined <<
95 // boundary is >pCurrentProposedStepLeng <<
96 // is returned together with the compute <<
97 // distance. Geometry must be closed. <<
98 <<
99 G4double CheckNextStep(const G4ThreeVector <<
100 const G4ThreeVector <<
101 const G4double pCur <<
102 G4double& pNe <<
103 // Same as above, but do not disturb the <<
104 <<
105 virtual <<
106 G4VPhysicalVolume* ResetHierarchyAndLocate <<
107 <<
108 <<
109 <<
110 // Resets the geometrical hierarchy and <<
111 // in the hierarchy containing the point <<
112 // The direction is used to check if a v <<
113 // The search begin is the geometrical h <<
114 // last located point, or the endpoint o <<
115 // SetGeometricallyLimitedStep() has bee <<
116 // <<
117 // Important Note: In order to call this <<
118 <<
119 virtual <<
120 G4VPhysicalVolume* LocateGlobalPointAndSet <<
121 const G <<
122 const G <<
123 const G <<
124 // Search the geometrical hierarchy for <<
125 // containing the point in the global co <<
126 // are: <<
127 // i) If pRelativeSearch=false it makes <<
128 // information. Returns the physical <<
129 // with all previous mothers correct <<
130 // ii) If pRelativeSearch is set to true <<
131 // geometrical hierarchy at the loca <<
132 // or the endpoint of previous Step <<
133 // has been called immediately befor <<
134 // The direction is used (to check if a <<
135 // - the argument ignoreDirection is f <<
136 // - the Navigator has determined that <<
137 // or more volumes. (This is state <<
138 // <<
139 // Important Note: In order to call this <<
140 <<
141 virtual <<
142 void LocateGlobalPointWithinVolume(const G <<
143 // Notify the Navigator that a track has <<
144 // 'position', that is known to be withi <<
145 // No check is performed to ensure that <<
146 // This method can be called instead of <<
147 // the caller is certain that the new gl <<
148 // the same volume as the previous posit <<
149 // Usually this can be guaranteed only i <<
150 <<
151 inline void LocateGlobalPointAndUpdateTouc <<
152 const G4ThreeVector& p <<
153 const G4ThreeVector& d <<
154 G4TouchableHandle& o <<
155 const G4bool R <<
156 // First, search the geometrical hierarc <<
157 // LocateGlobalPointAndSetup(). Then use <<
158 // navigation history to update the touc <<
159 <<
160 inline void LocateGlobalPointAndUpdateTouc <<
161 const G4ThreeVector& p <<
162 const G4ThreeVector& d <<
163 G4VTouchable* t <<
164 const G4bool R <<
165 // First, search the geometrical hierarc <<
166 // LocateGlobalPointAndSetup(). Then use <<
167 // navigation history to update the touc <<
168 <<
169 inline void LocateGlobalPointAndUpdateTouc <<
170 const G4ThreeVector& p <<
171 G4VTouchable* t <<
172 const G4bool R <<
173 // Same as the method above but missing <<
174 <<
175 inline void SetGeometricallyLimitedStep(); <<
176 // Inform the navigator that the previou <<
177 // by the geometry was taken in its enti <<
178 <<
179 virtual G4double ComputeSafety(const G4Thr <<
180 const G4dou <<
181 const G4boo <<
182 // Calculate the isotropic distance to t <<
183 // specified point in the global coordin <<
184 // The globalpoint utilised must be with <<
185 // The value returned is usually an unde <<
186 // The proposed maximum length is used t <<
187 // calculations. The geometry must be c <<
188 // To ensure minimum side effects from t <<
189 <<
190 inline G4VPhysicalVolume* GetWorldVolume() <<
191 // Return the current world (`topmost') <<
192 <<
193 inline void SetWorldVolume(G4VPhysicalVolu <<
194 // Set the world (`topmost') volume. Thi <<
195 // origin (0,0,0) and unrotated. <<
196 <<
197 inline G4TouchableHistory* CreateTouchable <<
198 inline G4TouchableHistory* CreateTouchable <<
199 // `Touchable' creation methods: caller <<
200 <<
201 virtual G4TouchableHandle CreateTouchableH <<
202 // Returns a reference counted handle to <<
203 <<
204 virtual G4ThreeVector GetLocalExitNormal(G <<
205 virtual G4ThreeVector GetLocalExitNormalAn <<
206 <<
207 virtual G4ThreeVector GetGlobalExitNormal( <<
208 <<
209 // Return Exit Surface Normal and validi <<
210 // Can only be called if the Navigator's <<
211 // volume geometrical boundary. <<
212 // It returns the Normal to the surface <<
213 // was left behind and/or into the volum <<
214 // Convention: <<
215 // The *local* normal is in the coordi <<
216 // Restriction: <<
217 // Normals are not available for repli <<
218 // These methods takes full care about h <<
219 // but if the surfaces are not convex it <<
220 <<
221 inline G4int GetVerboseLevel() const; <<
222 inline void SetVerboseLevel(G4int level); <<
223 // Get/Set Verbose(ness) level. <<
224 // [if level>0 && G4VERBOSE, printout ca <<
225 <<
226 inline G4bool IsActive() const; <<
227 // Verify if the navigator is active. <<
228 inline void Activate(G4bool flag); <<
229 // Activate/inactivate the navigator. <<
230 <<
231 inline G4bool EnteredDaughterVolume() cons <<
232 // The purpose of this function is to in <<
233 // entering a daughter volume while exit <<
234 // This method returns <<
235 // - True only in case 1) above, that is <<
236 // the track to arrive at a boundary o <<
237 // - False in cases 2), 3) and 4), i.e. <<
238 // This function is not guaranteed to wo <<
239 // was not called when it should have be <<
240 inline G4bool ExitedMotherVolume() const; <<
241 // Verify if the step has exited the mot <<
242 <<
243 inline void CheckMode(G4bool mode); <<
244 // Run navigation in "check-mode", there <<
245 // verifications and more strict correct <<
246 // Is effective only with G4VERBOSE set. <<
247 inline G4bool IsCheckModeActive() const; <<
248 inline void SetPushVerbosity(G4bool mode); <<
249 // Set/unset verbosity for pushed tracks <<
250 <<
251 void PrintState() const; <<
252 // Print the internal state of the Navig <<
253 // The level of detail is according to t <<
254 <<
255 inline const G4AffineTransform& GetGlobalT <<
256 inline const G4AffineTransform GetLocalTo <<
257 // Obtain the transformations Global/Loc <<
258 // Clients of these methods must copy th <<
259 <<
260 G4AffineTransform GetMotherToDaughterTrans <<
261 <<
262 <<
263 // Obtain mother to daughter transformat <<
264 <<
265 inline void ResetStackAndState(); <<
266 // Reset stack and minimum or navigator <<
267 // as needed by LocalGlobalPointAndSetup <<
268 // Does not perform clears, resizes, or <<
269 <<
270 inline G4int SeverityOfZeroStepping( G4int <<
271 // Report on severity of error and numbe <<
272 // in case Navigator is stuck and is ret <<
273 // Values: 1 (small problem), 5 (correc <<
274 // 9 (ready to abandon), 10 (aba <<
275 <<
276 inline G4ThreeVector GetCurrentLocalCoordi <<
277 // Return the local coordinate of the po <<
278 // of its containing volume that was fou <<
279 // The local coordinate of the last loca <<
280 <<
281 inline G4ThreeVector NetTranslation() cons <<
282 inline G4RotationMatrix NetRotation() cons <<
283 // Compute+return the local->global tran <<
284 <<
285 inline void EnableBestSafety( G4bool value <<
286 // Enable best-possible evaluation of is <<
287 <<
288 inline G4VExternalNavigation* GetExternalN <<
289 void SetExternalNavigation(G4VExternalNavi <<
290 // Accessor & modifier for custom extern <<
291 <<
292 inline G4VoxelNavigation& GetVoxelNavigato <<
293 void SetVoxelNavigation(G4VoxelNavigation* <<
294 // Alternative navigator for voxel volum <<
295 <<
296 inline G4Navigator* Clone() const; <<
297 // Cloning feature for use in MT applica <<
298 // navigator, including external sub-nav <<
299 // Client has responsibility for ownersh <<
300 <<
301 inline G4ThreeVector GetLastStepEndPoint() <<
302 // Get endpoint of last step. <<
303 <<
304 void InformLastStep(G4double lastStep, <<
305 G4bool entersDaughtVol <<
306 G4bool exitsMotherVol <<
307 // Derived navigators which rely on Loca <<
308 // inform size of step, to maintain logi <<
309 // for challenging cases. <<
310 // Required in order to cope with multip <<
311 // => Locate with use direction rather t <<
312 <<
313 protected: <<
314 <<
315 void SetSavedState(); <<
316 // ( fValidExitNormal, fExitNormal, fExi <<
317 // fBlockedPhysicalVolume, fBlockedRep <<
318 // Extended to include: <<
319 // ( fLastLocatedPointLocal, fLocatedOut <<
320 // fEnteredDaughter, fExitedMother <<
321 // fPreviousSftOrigin, sPreviousSafety <<
322 <<
323 void RestoreSavedState(); <<
324 // Copy aspects of the state, to enable <<
325 // call to ComputeStep(). <<
326 <<
327 virtual void ResetState(); <<
328 // Utility method to reset the navigator <<
329 <<
330 inline G4ThreeVector ComputeLocalPoint(con <<
331 // Return position vector in local coord <<
332 // vector in world coordinate system. <<
333 <<
334 inline G4ThreeVector ComputeLocalAxis(cons <<
335 // Return the local direction of the spe <<
336 // system of the volume that was found b <<
337 // The Local Coordinates of point in wor <<
338 <<
339 inline EVolume VolumeType(const G4VPhysica <<
340 // Characterise `type' of volume - norma <<
341 <<
342 inline EVolume CharacteriseDaughters(const <<
343 // Characterise daughter of logical volu <<
344 <<
345 inline G4int GetDaughtersRegularStructureI <<
346 // Get regular structure ID of first dau <<
347 <<
348 virtual void SetupHierarchy(); <<
349 // Renavigate & reset hierarchy describe <<
350 // o Reset volumes and recompute transfo <<
351 // replicated/parameterised volumes. <<
352 <<
353 G4bool CheckOverlapsIterative(G4VPhysicalV <<
354 // Utility method to trigger overlaps ch <<
355 // overlaps ordered by relevance. Used i <<
356 // with zero step are detected. <<
357 <<
358 private: <<
359 <<
360 void ComputeStepLog(const G4ThreeVector& p <<
361 G4double moveLen <<
362 // Log and checks for steps larger than <<
363 <<
364 protected: <<
365 <<
366 G4double kCarTolerance, fMinStep, fSqTol; <<
367 // Cached tolerances. <<
368 <<
369 // <<
370 // BEGIN State information <<
371 // <<
372 <<
373 G4NavigationHistory fHistory; <<
374 // Transformation and history of the cur <<
375 // through the geometrical hierarchy. <<
376 <<
377 G4ThreeVector fStepEndPoint; <<
378 // Endpoint of last ComputeStep <<
379 // can be used for optimisation (e.g. wh <<
380 G4ThreeVector fLastStepEndPointLocal; <<
381 // Position of the end-point of the last <<
382 // in last Local coordinates. <<
383 <<
384 G4int fVerbose = 0; <<
385 // Verbose(ness) level [if > 0, printou <<
386 <<
387 G4bool fEnteredDaughter; <<
388 // A memory of whether in this Step a da <<
389 // (set in Compute & Locate). <<
390 // After Compute: it expects to enter a <<
391 // After Locate: it has entered a daugh <<
392 <<
393 G4bool fExitedMother; <<
394 // A similar memory whether the Step exi <<
395 // completely, not entering daughter. <<
396 <<
397 G4bool fWasLimitedByGeometry = false; <<
398 // Set true if last Step was limited by <<
399 <<
400 private: <<
401 <<
402 G4ThreeVector fLastLocatedPointLocal; <<
403 // Position of the last located point re <<
404 // This is coupled with the bool member <<
405 <<
406 G4ThreeVector fExitNormal; <<
407 // Leaving volume normal, in the volume <<
408 // volume's coordinate system. <<
409 // This is closely coupled with fValidEx <<
410 // we have a (valid) normal for volume w <<
411 <<
412 G4ThreeVector fGrandMotherExitNormal; <<
413 // Leaving volume normal, in its own coo <<
414 G4ThreeVector fExitNormalGlobalFrame; <<
415 // Leaving volume normal, in the global <<
416 <<
417 G4ThreeVector fPreviousSftOrigin; <<
418 G4double fPreviousSafety; <<
419 // Memory of last safety origin & value. <<
420 // that origin of current Step is in the <<
421 // last relocation. <<
422 <<
423 G4VPhysicalVolume* fLastMotherPhys = nullp <<
424 // Memory of the mother volume during pr <<
425 // Intended use: inform user in case of <<
426 <<
427 G4VPhysicalVolume* fBlockedPhysicalVolume; <<
428 G4int fBlockedReplicaNo; <<
429 // Identifies the volume and copy / repl <<
430 // (after exiting -- because the exit di <<
431 // or a candidate for entry (after compu <<
432 <<
433 G4int fNumberZeroSteps; <<
434 // Count zero steps, as one or two can o <<
435 // a boundary or at an edge common betwe <<
436 // are likely a problem in the geometry <<
437 // Number of preceding moves that were Z <<
438 G4int fActionThreshold_NoZeroSteps = 10; <<
439 // After this many failed/zero steps, ac <<
440 G4int fAbandonThreshold_NoZeroSteps = 25; <<
441 // After this many failed/zero steps, ab <<
442 <<
443 G4bool fActive = false; <<
444 // States if the navigator is activated <<
445 <<
446 G4bool fLastTriedStepComputation = false; <<
447 // Whether ComputeStep() was called sinc <<
448 // Uses: distinguish parts of state whic <<
449 // to ComputeStep() or one of the Locate <<
450 // calls to compute-step (illegal). <<
451 <<
452 G4bool fEntering, fExiting; <<
453 // Entering/Exiting volumes blocking/set <<
454 // o If exiting, volume ptr & replica nu <<
455 // used for blocking on redescent of g <<
456 // o If entering, volume ptr & replica n <<
457 // used by Locate..()) of volume for ' <<
458 <<
459 G4bool fValidExitNormal; <<
460 // Set true if have leaving volume norma <<
461 G4bool fLastStepWasZero; <<
462 // Whether the last ComputeStep moved Ze <<
463 G4bool fLocatedOnEdge; <<
464 // Whether the Navigator has detected an <<
465 G4bool fLocatedOutsideWorld; <<
466 // Whether the last call to Locate metho <<
467 <<
468 G4bool fChangedGrandMotherRefFrame; <<
469 // Whether frame is changed. <<
470 G4bool fCalculatedExitNormal; <<
471 // Has it been computed since the last c <<
472 // Covers both Global and GrandMother. <<
473 81
474 // END State information << 82 virtual ~G4Navigator();
475 // << 83 // Destructor. No actions.
>> 84
>> 85 virtual G4double ComputeStep(const G4ThreeVector &pGlobalPoint,
>> 86 const G4ThreeVector &pDirection,
>> 87 const G4double pCurrentProposedStepLength,
>> 88 G4double &pNewSafety);
>> 89 // Calculate the distance to the next boundary intersected
>> 90 // along the specified NORMALISED vector direction and
>> 91 // from the specified point in the global coordinate
>> 92 // system. LocateGlobalPointAndSetup or LocateGlobalPointWithinVolume
>> 93 // must have been called with the same global point prior to this call.
>> 94 // The isotropic distance to the nearest boundary is also
>> 95 // calculated (usually an underestimate). The current
>> 96 // proposed Step length is used to avoid intersection
>> 97 // calculations: if it can be determined that the nearest
>> 98 // boundary is >pCurrentProposedStepLength away, kInfinity
>> 99 // is returned together with the computed isotropic safety
>> 100 // distance. Geometry must be closed.
>> 101
>> 102 G4double CheckNextStep(const G4ThreeVector &pGlobalPoint,
>> 103 const G4ThreeVector &pDirection,
>> 104 const G4double pCurrentProposedStepLength,
>> 105 G4double &pNewSafety);
>> 106 // Same as above, but do not disturb the state of the Navigator.
>> 107
>> 108 virtual
>> 109 G4VPhysicalVolume* ResetHierarchyAndLocate(const G4ThreeVector &point,
>> 110 const G4ThreeVector &direction,
>> 111 const G4TouchableHistory &h);
>> 112
>> 113 // Resets the geometrical hierarchy and search for the volumes deepest
>> 114 // in the hierarchy containing the point in the global coordinate space.
>> 115 // The direction is used to check if a volume is entered.
>> 116 // The search begin is the geometrical hierarchy at the location of the
>> 117 // last located point, or the endpoint of the previous Step if
>> 118 // SetGeometricallyLimitedStep() has been called immediately before.
>> 119 //
>> 120 // Important Note: In order to call this the geometry MUST be closed.
476 121
477 // Optional State information (created/use << 122 virtual
>> 123 G4VPhysicalVolume* LocateGlobalPointAndSetup(const G4ThreeVector& point,
>> 124 const G4ThreeVector* direction=0,
>> 125 const G4bool pRelativeSearch=true,
>> 126 const G4bool ignoreDirection=true);
>> 127 // Search the geometrical hierarchy for the volumes deepest in the hierarchy
>> 128 // containing the point in the global coordinate space. Two main cases are:
>> 129 // i) If pRelativeSearch=false it makes use of no previous/state
>> 130 // information. Returns the physical volume containing the point,
>> 131 // with all previous mothers correctly set up.
>> 132 // ii) If pRelativeSearch is set to true, the search begin is the
>> 133 // geometrical hierarchy at the location of the last located point,
>> 134 // or the endpoint of the previous Step if SetGeometricallyLimitedStep()
>> 135 // has been called immediately before.
>> 136 // The direction is used (to check if a volume is entered) if either
>> 137 // - the argument ignoreDirection is false, or
>> 138 // - the Navigator has determined that it is on an edge shared by two or
>> 139 // more volumes. (This is state information.)
478 // 140 //
479 << 141 // Important Note: In order to call this the geometry MUST be closed.
480 // Save key state information (NOT the nav <<
481 // <<
482 struct G4SaveNavigatorState <<
483 { <<
484 G4ThreeVector sExitNormal; <<
485 G4bool sValidExitNormal; <<
486 G4bool sEntering, sExiting; <<
487 G4VPhysicalVolume* spBlockedPhysicalVol <<
488 G4int sBlockedReplicaNo; <<
489 G4int sLastStepWasZero; <<
490 G4bool sWasLimitedByGeometry; <<
491 <<
492 // Potentially relevant <<
493 // <<
494 G4bool sLocatedOutsideWorld; <<
495 G4ThreeVector sLastLocatedPointLocal; <<
496 G4bool sEnteredDaughter, sExitedMother; <<
497 G4ThreeVector sPreviousSftOrigin; <<
498 G4double sPreviousSafety; <<
499 } fSaveState; <<
500 <<
501 // BEGIN -- Tracking Invariants <<
502 // ======================================= <<
503 <<
504 G4VPhysicalVolume* fTopPhysical = nullptr; <<
505 // A link to the topmost physical volume <<
506 // Must be positioned at the origin and <<
507 <<
508 // Helpers/Utility classes <<
509 // <<
510 G4NormalNavigation fnormalNav; <<
511 G4VoxelNavigation* fpvoxelNav; <<
512 G4ParameterisedNavigation fparamNav; <<
513 G4ReplicaNavigation freplicaNav; <<
514 G4RegularNavigation fregularNav; <<
515 G4VExternalNavigation* fpExternalNav = nul <<
516 G4VoxelSafety* fpVoxelSafety; <<
517 G4SafetyCalculator* fpSafetyCalculator = n <<
518 <<
519 // Utility information <<
520 // <<
521 G4bool fCheck = false; <<
522 // Check-mode flag [if true, more stric <<
523 G4bool fPushed = false, fWarnPush = true; <<
524 // Push flags [if true, means a stuck p <<
525 142
526 // End -- Tracking Invariants << 143 virtual
>> 144 void LocateGlobalPointWithinVolume(const G4ThreeVector& position);
>> 145 // Notify the Navigator that a track has moved to the new Global point
>> 146 // 'position', that is known to be within the current safety.
>> 147 // No check is performed to ensure that it is within the volume.
>> 148 // This method can be called instead of LocateGlobalPointAndSetup ONLY if
>> 149 // the caller is certain that the new global point (position) is inside the
>> 150 // same volume as the previous position. Usually this can be guaranteed
>> 151 // only if the point is within safety.
>> 152
>> 153 inline void LocateGlobalPointAndUpdateTouchableHandle(
>> 154 const G4ThreeVector& position,
>> 155 const G4ThreeVector& direction,
>> 156 G4TouchableHandle& oldTouchableToUpdate,
>> 157 const G4bool RelativeSearch = true);
>> 158 // First, search the geometrical hierarchy like the above method
>> 159 // LocateGlobalPointAndSetup(). Then use the volume found and its
>> 160 // navigation history to update the touchable.
>> 161
>> 162 inline void LocateGlobalPointAndUpdateTouchable(
>> 163 const G4ThreeVector& position,
>> 164 const G4ThreeVector& direction,
>> 165 G4VTouchable* touchableToUpdate,
>> 166 const G4bool RelativeSearch = true);
>> 167 // First, search the geometrical hierarchy like the above method
>> 168 // LocateGlobalPointAndSetup(). Then use the volume found and its
>> 169 // navigation history to update the touchable.
>> 170
>> 171 inline void LocateGlobalPointAndUpdateTouchable(
>> 172 const G4ThreeVector& position,
>> 173 G4VTouchable* touchableToUpdate,
>> 174 const G4bool RelativeSearch = true);
>> 175 // Same as the method above but missing direction.
>> 176
>> 177 inline void SetGeometricallyLimitedStep();
>> 178 // Inform the navigator that the previous Step calculated
>> 179 // by the geometry was taken in its entirety.
>> 180
>> 181 virtual G4double ComputeSafety(const G4ThreeVector &globalpoint,
>> 182 const G4double pProposedMaxLength = DBL_MAX);
>> 183 // Calculate the isotropic distance to the nearest boundary from the
>> 184 // specified point in the global coordinate system.
>> 185 // The globalpoint utilised must be within the current volume.
>> 186 // The value returned is usually an underestimate.
>> 187 // The proposed maximum length is used to avoid volume safety
>> 188 // calculations. The geometry must be closed.
>> 189
>> 190 inline G4VPhysicalVolume* GetWorldVolume() const;
>> 191 // Return the current world (`topmost') volume.
>> 192
>> 193 inline void SetWorldVolume(G4VPhysicalVolume* pWorld);
>> 194 // Set the world (`topmost') volume. This must be positioned at
>> 195 // origin (0,0,0) and unrotated.
>> 196
>> 197 inline G4GRSVolume* CreateGRSVolume() const;
>> 198 inline G4GRSSolid* CreateGRSSolid() const;
>> 199 inline G4TouchableHistory* CreateTouchableHistory() const;
>> 200 // `Touchable' creation methods: caller has deletion responsibility.
>> 201
>> 202 virtual G4TouchableHistoryHandle CreateTouchableHistoryHandle() const;
>> 203 // Returns a reference counted handle to a touchable history.
>> 204
>> 205 virtual G4ThreeVector GetLocalExitNormal(G4bool* valid);
>> 206 // Returns Exit Surface Normal and validity too.
>> 207 // It can only be called if the Navigator's last Step has crossed a
>> 208 // volume geometrical boundary.
>> 209 // It returns the Normal to the surface pointing out of the volume that
>> 210 // was left behind and/or into the volume that was entered.
>> 211 // (The normal is in the coordinate system of the final volume.)
>> 212 // This function takes full care about how to calculate this normal,
>> 213 // but if the surfaces are not convex it will return valid=false.
>> 214
>> 215 inline G4int GetVerboseLevel() const;
>> 216 inline void SetVerboseLevel(G4int level);
>> 217 // Get/Set Verbose(ness) level.
>> 218 // [if level>0 && G4VERBOSE, printout can occur]
>> 219
>> 220 inline G4bool IsActive() const;
>> 221 // Verify if the navigator is active.
>> 222 inline void Activate(G4bool flag);
>> 223 // Activate/inactivate the navigator.
>> 224
>> 225 inline G4bool EnteredDaughterVolume() const;
>> 226 // The purpose of this function is to inform the caller if the track is
>> 227 // entering a daughter volume while exiting from the current volume.
>> 228 // This method returns
>> 229 // - True only in case 1) above, that is when the Step has caused
>> 230 // the track to arrive at a boundary of a daughter.
>> 231 // - False in cases 2), 3) and 4), i.e. in all other cases.
>> 232 // This function is not guaranteed to work if SetGeometricallyLimitedStep()
>> 233 // was not called when it should have been called.
>> 234 inline G4bool ExitedMotherVolume() const;
>> 235 // Verify if the step has exited the mother volume.
>> 236
>> 237 inline void CheckMode(G4bool mode);
>> 238 // Run navigation in "check-mode", therefore using additional
>> 239 // verifications and more strict correctness conditions.
>> 240 // Is effective only with G4VERBOSE set.
>> 241
>> 242 void PrintState() const;
>> 243 // Print the internal state of the Navigator (for debugging).
>> 244 // The level of detail is according to the verbosity.
>> 245
>> 246 inline const G4AffineTransform& GetGlobalToLocalTransform() const;
>> 247 inline const G4AffineTransform GetLocalToGlobalTransform() const;
>> 248 // Obtain the transformations Global/Local (and inverse).
>> 249 // Clients of these methods must copy the data if they need to keep it.
>> 250
>> 251 inline void ResetStackAndState();
>> 252 // Reset stack and minimum or navigator state machine necessary for reset
>> 253 // as needed by LocalGlobalPointAndSetup.
>> 254 // [Does not perform clears, resizes, or reset fLastLocatedPointLocal]
>> 255
>> 256 inline G4int SeverityOfZeroStepping( G4int* noZeroSteps ) const;
>> 257 // Report on severity of error and number of zero steps,
>> 258 // in case Navigator is stuck and is returning zero steps.
>> 259 // Values: 1 (small problem), 5 (correcting),
>> 260 // 9 (ready to abandon), 10 (abandoned)
>> 261
>> 262 // inline
>> 263 void SetSavedState();
>> 264 // ( fValidExitNormal, fExitNormal, fExiting, fEntering,
>> 265 // fBlockedPhysicalVolume, fBlockedReplicaNo, fLastStepWasZero);
>> 266 // inline
>> 267 void RestoreSavedState();
>> 268 // Copy aspects of the state, to enable a non-state changing
>> 269 // call to ComputeStep
>> 270
>> 271 public: // with description
>> 272
>> 273 inline G4ThreeVector GetCurrentLocalCoordinate() const;
>> 274 // Return the local coordinate of the point in the reference system
>> 275 // of its containing volume that was found by LocalGlobalPointAndSetup.
>> 276 // The local coordinate of the last located track.
>> 277
>> 278 inline G4ThreeVector NetTranslation() const;
>> 279 inline G4RotationMatrix NetRotation() const;
>> 280 // Compute+return the local->global translation/rotation of current volume.
>> 281
>> 282 protected: // with description
>> 283 inline G4ThreeVector ComputeLocalPoint(const G4ThreeVector& rGlobPoint) const;
>> 284 // Return position vector in local coordinate system, given a position
>> 285 // vector in world coordinate system.
>> 286
>> 287 inline G4ThreeVector ComputeLocalAxis(const G4ThreeVector& pVec) const;
>> 288 // Return the local direction of the specified vector in the reference
>> 289 // system of the volume that was found by LocalGlobalPointAndSetup.
>> 290 // The Local Coordinates of point in world coordinate system.
>> 291
>> 292 virtual void ResetState();
>> 293 // Utility method to reset the navigator state machine.
>> 294
>> 295 inline EVolume VolumeType(const G4VPhysicalVolume *pVol) const;
>> 296 // Characterise `type' of volume - normal/replicated/parameterised.
>> 297
>> 298 inline EVolume CharacteriseDaughters(const G4LogicalVolume *pLog) const;
>> 299 // Characterise daughter of logical volume.
>> 300
>> 301 virtual void SetupHierarchy();
>> 302 // Renavigate & reset hierarchy described by current history
>> 303 // o Reset volumes
>> 304 // o Recompute transforms and/or solids of replicated/parameterised
>> 305 // volumes.
>> 306
>> 307 protected: // without description
>> 308
>> 309 G4double kCarTolerance;
>> 310 // Geometrical tolerance for surface thickness of shapes.
>> 311
>> 312 //
>> 313 // BEGIN State information
>> 314 //
>> 315
>> 316 G4NavigationHistory fHistory;
>> 317 // Transformation and history of the current path
>> 318 // through the geometrical hierarchy.
>> 319
>> 320 G4bool fEnteredDaughter;
>> 321 // A memory of whether in this Step a daughter volume is entered
>> 322 // (set in Compute & Locate).
>> 323 // After Compute: it expects to enter a daughter
>> 324 // After Locate: it has entered a daughter
>> 325
>> 326 G4bool fExitedMother;
>> 327 // A similar memory whether the Step exited current "mother" volume
>> 328 // completely, not entering daughter.
>> 329
>> 330 G4bool fWasLimitedByGeometry;
>> 331 // Set true if last Step was limited by geometry.
>> 332
>> 333 private:
>> 334
>> 335 G4bool fActive;
>> 336 // States if the navigator is activated or not.
>> 337
>> 338 G4bool fEntering,fExiting;
>> 339 // Entering/Exiting volumes blocking/setup
>> 340 // o If exiting
>> 341 // volume ptr & replica number (set & used by Locate..())
>> 342 // used for blocking on redescent of geometry
>> 343 // o If entering
>> 344 // volume ptr & replica number (set by ComputeStep(),used by
>> 345 // Locate..()) of volume for `automatic' entry
>> 346
>> 347 G4VPhysicalVolume *fBlockedPhysicalVolume;
>> 348 G4int fBlockedReplicaNo;
>> 349
>> 350 // G4VPhysicalVolume *fCandidatePhysicalVolume; // Unused
>> 351 // G4int fCandidateReplicaNo;
>> 352
>> 353 G4ThreeVector fLastLocatedPointLocal;
>> 354 // Position of the last located point relative to its containing volume.
>> 355 G4bool fLocatedOutsideWorld;
>> 356 // Whether the last call to Locate methods left the world
>> 357 // G4PhysicalVolume* fLastVolumeLocated;
>> 358
>> 359 G4bool fValidExitNormal; // Set true if have leaving volume normal
>> 360 G4ThreeVector fExitNormal; // Leaving volume normal, in the
>> 361 // volume containing the exited
>> 362 // volume's coordinate system
>> 363 G4ThreeVector fGrandMotherExitNormal; // Leaving volume normal, in its
>> 364 // own coordinate system
>> 365
>> 366 // Count zero steps - as one or two can occur due to changing momentum at
>> 367 // a boundary or at an edge common between volumes
>> 368 // - several are likely a problem in the geometry
>> 369 // description or in the navigation
>> 370 //
>> 371 G4bool fLastStepWasZero;
>> 372 // Whether the last ComputeStep moved Zero. Used to check for edges.
>> 373
>> 374 G4bool fLocatedOnEdge;
>> 375 // Whether the Navigator has detected an edge
>> 376 G4int fNumberZeroSteps;
>> 377 // Number of preceding moves that were Zero. Reset to 0 after finite step
>> 378 G4int fActionThreshold_NoZeroSteps;
>> 379 // After this many failed/zero steps, act (push etc)
>> 380 G4int fAbandonThreshold_NoZeroSteps;
>> 381 // After this many failed/zero steps, abandon track
>> 382
>> 383 G4ThreeVector fPreviousSftOrigin;
>> 384 G4double fPreviousSafety;
>> 385 // Memory of last safety origin & value. Used in ComputeStep to ensure
>> 386 // that origin of current Step is in the same volume as the point of the
>> 387 // last relocation
>> 388
>> 389 //
>> 390 // END State information
>> 391 //
>> 392
>> 393 // Save key state information (NOT the navigation history stack)
>> 394 //
>> 395 struct G4SaveNavigatorState
>> 396 {
>> 397 G4ThreeVector sExitNormal;
>> 398 G4bool sValidExitNormal;
>> 399 G4bool sEntering, sExiting;
>> 400 G4VPhysicalVolume* spBlockedPhysicalVolume;
>> 401 G4int sBlockedReplicaNo;
>> 402 G4int sLastStepWasZero;
>> 403
>> 404 // Potentially relevant
>> 405 //
>> 406 G4bool sLocatedOutsideWorld;
>> 407 G4ThreeVector sLastLocatedPointLocal;
>> 408 G4bool sEnteredDaughter, sExitedMother;
>> 409 G4ThreeVector sPreviousSftOrigin;
>> 410 G4double sPreviousSafety;
>> 411 } fSaveState;
>> 412
>> 413 // Tracking Invariants
>> 414 //
>> 415 G4VPhysicalVolume *fTopPhysical;
>> 416 // A link to the topmost physical volume in the detector.
>> 417 // Must be positioned at the origin and unrotated.
>> 418
>> 419 // Utility information
>> 420 //
>> 421 G4bool fCheck;
>> 422 // Check-mode flag [if true, more strict checks are performed].
>> 423 G4bool fPushed;
>> 424 // Push flag [if true, means a stuck particle has been pushed].
>> 425 G4int fVerbose;
>> 426 // Verbose(ness) level [if > 0, printout can occur].
>> 427
>> 428 // Helpers/Utility classes
>> 429 //
>> 430 G4NormalNavigation fnormalNav;
>> 431 G4VoxelNavigation fvoxelNav;
>> 432 G4ParameterisedNavigation fparamNav;
>> 433 G4ReplicaNavigation freplicaNav;
527 }; 434 };
528 435
529 #include "G4Navigator.icc" 436 #include "G4Navigator.icc"
530 437
531 #endif 438 #endif
532 439
533 440
534 // NOTES: 441 // NOTES:
535 // 442 //
536 // The following methods provide detailed info 443 // The following methods provide detailed information when a Step has
537 // arrived at a geometrical boundary. They di 444 // arrived at a geometrical boundary. They distinguish between the different
538 // causes that can result in the track leaving 445 // causes that can result in the track leaving its current volume.
539 // 446 //
540 // Four cases are possible: 447 // Four cases are possible:
541 // 448 //
542 // 1) The particle has reached a boundary of a 449 // 1) The particle has reached a boundary of a daughter of the current volume:
543 // (this could cause the relocation to ent 450 // (this could cause the relocation to enter the daughter itself
544 // or a potential granddaughter or further 451 // or a potential granddaughter or further descendant)
545 // 452 //
546 // 2) The particle has reached a boundary of t 453 // 2) The particle has reached a boundary of the current
547 // volume, exiting into a mother (regardle 454 // volume, exiting into a mother (regardless the level
548 // at which it is located in the tree): 455 // at which it is located in the tree):
549 // 456 //
550 // 3) The particle has reached a boundary of t 457 // 3) The particle has reached a boundary of the current
551 // volume, exiting into a volume which is 458 // volume, exiting into a volume which is not in its
552 // parental hierarchy: 459 // parental hierarchy:
553 // 460 //
554 // 4) The particle is not on a boundary betwee 461 // 4) The particle is not on a boundary between volumes:
555 // the function returns an exception, and 462 // the function returns an exception, and the caller is
556 // reccomended to compare the G4touchables 463 // reccomended to compare the G4touchables associated
557 // to the preStepPoint and postStepPoint t 464 // to the preStepPoint and postStepPoint to handle this case.
558 // 465 //
559 // G4bool EnteredDaughterVolume() 466 // G4bool EnteredDaughterVolume()
560 // G4bool IsExitNormalValid() 467 // G4bool IsExitNormalValid()
561 // G4ThreeVector GetLocalExitNormal() 468 // G4ThreeVector GetLocalExitNormal()
562 // 469 //
563 // The expected usefulness of these methods is 470 // The expected usefulness of these methods is to allow the caller to
564 // determine how to compute the surface normal 471 // determine how to compute the surface normal at the volume boundary. The two
565 // possibilities are to obtain the normal from 472 // possibilities are to obtain the normal from:
566 // 473 //
567 // i) the solid associated with the volume o 474 // i) the solid associated with the volume of the initial point of the Step.
568 // This is valid for cases 2 and 3. 475 // This is valid for cases 2 and 3.
569 // (Note that the initial point is genera 476 // (Note that the initial point is generally the PreStepPoint of a Step).
570 // or 477 // or
571 // 478 //
572 // ii) the solid of the final point, ie of th 479 // ii) the solid of the final point, ie of the volume after the relocation.
573 // This is valid for case 1. 480 // This is valid for case 1.
574 // (Note that the final point is generall 481 // (Note that the final point is generally the PreStepPoint of a Step).
575 // 482 //
576 // This way the caller can always get a valid 483 // This way the caller can always get a valid normal, pointing outside
577 // the solid for which it is computed, that ca 484 // the solid for which it is computed, that can be used at his own
578 // discretion. 485 // discretion.
579 486