85 G4bool& recalculatedEndPoint,
91 G4bool found_approximate_intersection =
false;
92 G4bool there_is_no_intersection =
false;
94 G4FieldTrack CurrentA_PointVelocity = CurveStartPointVelocity;
95 G4FieldTrack CurrentB_PointVelocity = CurveEndPointVelocity;
97 G4bool validNormalAtE =
false;
100 G4FieldTrack ApproxIntersecPointV(CurveEndPointVelocity);
102 G4bool last_AF_intersection =
false;
103 G4bool final_section =
true;
105 recalculatedEndPoint =
false;
107 G4bool restoredFullEndpoint =
false;
109 G4int substep_no = 0;
113 const G4int max_substeps = 100000000;
114 const G4int warn_substeps = 1000;
125 if( (TrialPoint - StartPosition).mag() < tolerance *
CLHEP::mm )
127 G4Exception(
"G4SimpleLocator::EstimateIntersectionPoint()",
129 "Intersection point F is exactly at start point A." );
143 CurrentB_PointVelocity,
152 G4Exception(
"G4SimpleLocator::EstimateIntersectionPoint()",
154 "Intermediate F point is past end B point!" );
163 G4ThreeVector ChordEF_Vector = CurrentF_Point - CurrentE_Point;
166 G4double MomDir_dot_Norm= NewMomentumDir.dot( NormalAtEntry ) ;
173 NewMomentumDir, NormalAtEntry, validNormalAtE );
178 G4bool adequate_angle = ( MomDir_dot_Norm >= 0.0 )
179 || (! validNormalAtE );
180 G4double EF_dist2= ChordEF_Vector.mag2();
184 found_approximate_intersection =
true;
188 IntersectedOrRecalculatedFT = ApproxIntersecPointV;
189 IntersectedOrRecalculatedFT.
SetPosition( CurrentE_Point );
198 CurrentE_Point, CurrentF_Point, MomentumDir,
199 last_AF_intersection, IP, NewSafety,
200 fPreviousSafety, fPreviousSftOrigin );
204 IntersectedOrRecalculatedFT = ApproxIntersecPointV;
227 G4bool usedNavigatorAF =
false;
236 last_AF_intersection = Intersects_AF;
245 CurrentB_PointVelocity = ApproxIntersecPointV;
246 CurrentE_Point = PointG;
256 validNormalAtE = validNormalLast;
261 final_section=
false;
266 G4cout <<
"G4PiF::LI> Investigating intermediate point"
268 <<
" on way to full s="
283 G4bool usedNavigatorFB=
false;
289 NewSafety,fPreviousSafety,
292 PointH, &usedNavigatorFB );
307 CurrentA_PointVelocity = ApproxIntersecPointV;
308 CurrentE_Point = PointH;
318 validNormalAtE = validNormalLast;
332 there_is_no_intersection =
true;
338 CurrentA_PointVelocity = CurrentB_PointVelocity;
339 CurrentB_PointVelocity = CurveEndPointVelocity;
340 restoredFullEndpoint =
true;
362 CurrentB_PointVelocity,
366 CurrentB_PointVelocity = newEndPointFT;
370 recalculatedEndPoint =
true;
371 IntersectedOrRecalculatedFT = newEndPointFT;
375 if( curveDist < 0.0 )
378 printStatus( CurrentA_PointVelocity, CurrentB_PointVelocity,
379 -1.0, NewSafety, substep_no );
380 std::ostringstream message;
381 message <<
"Error in advancing propagation." <<
G4endl
382 <<
" Point A (start) is " << CurrentA_PointVelocity
384 <<
" Point B (end) is " << CurrentB_PointVelocity
386 <<
" Curve distance is " << curveDist <<
G4endl
388 <<
"The final curve point is not further along"
389 <<
" than the original!" <<
G4endl;
391 if( recalculatedEndPoint )
393 message <<
"Recalculation of EndPoint was called with fEpsStep= "
396 message.precision(20);
397 message <<
" Point A (Curve start) is " << CurveStartPointVelocity
399 <<
" Point B (Curve end) is " << CurveEndPointVelocity
401 <<
" Point A (Current start) is " << CurrentA_PointVelocity
403 <<
" Point B (Current end) is " << CurrentB_PointVelocity
405 <<
" Point E (Trial Point) is " << CurrentE_Point
407 <<
" Point F (Intersection) is " << ApproxIntersecPointV
409 <<
" LocateIntersection parameters are : Substep no= "
412 G4Exception(
"G4SimpleLocator::EstimateIntersectionPoint()",
416 if(restoredFullEndpoint)
418 final_section = restoredFullEndpoint;
419 restoredFullEndpoint =
false;
424 #ifdef G4DEBUG_LOCATE_INTERSECTION
425 static G4int trigger_substepno_print= warn_substeps - 20;
427 if( substep_no >= trigger_substepno_print )
429 G4cout <<
"Difficulty in converging in "
430 <<
"G4SimpleLocator::EstimateIntersectionPoint():"
432 <<
" Substep no = " << substep_no <<
G4endl;
433 if( substep_no == trigger_substepno_print )
435 printStatus( CurveStartPointVelocity, CurveEndPointVelocity,
438 G4cout <<
" State of point A: ";
439 printStatus( CurrentA_PointVelocity, CurrentA_PointVelocity,
440 -1.0, NewSafety, substep_no-1, 0);
441 G4cout <<
" State of point B: ";
442 printStatus( CurrentA_PointVelocity, CurrentB_PointVelocity,
443 -1.0, NewSafety, substep_no);
448 }
while ( ( ! found_approximate_intersection )
449 && ( ! there_is_no_intersection )
450 && ( substep_no <= max_substeps) );
452 if( substep_no > max_no_seen )
454 max_no_seen = substep_no;
455 #ifdef G4DEBUG_LOCATE_INTERSECTION
456 if( max_no_seen > warn_substeps )
458 trigger_substepno_print = max_no_seen-20;
463 if( ( substep_no >= max_substeps)
464 && !there_is_no_intersection
465 && !found_approximate_intersection )
467 G4cout <<
"ERROR - G4SimpleLocator::EstimateIntersectionPoint()" <<
G4endl
468 <<
" Start and Endpoint of Requested Step:" <<
G4endl;
469 printStatus( CurveStartPointVelocity, CurveEndPointVelocity,
472 <<
" Start and end-point of current Sub-Step:" <<
G4endl;
473 printStatus( CurrentA_PointVelocity, CurrentA_PointVelocity,
474 -1.0, NewSafety, substep_no-1);
475 printStatus( CurrentA_PointVelocity, CurrentB_PointVelocity,
476 -1.0, NewSafety, substep_no);
478 std::ostringstream message;
479 message <<
"Convergence is requiring too many substeps: "
480 << substep_no << G4endl
481 <<
" Abandoning effort to intersect." << G4endl
482 <<
" Found intersection = "
483 << found_approximate_intersection << G4endl
484 <<
" Intersection exists = "
485 << !there_is_no_intersection <<
G4endl;
486 message.precision(10);
489 message <<
" Undertaken only length: " << done_len
490 <<
" out of " << full_len <<
" required." << G4endl
491 <<
" Remaining length = " << full_len-done_len;
493 G4Exception(
"G4SimpleLocator::EstimateIntersectionPoint()",
496 else if( substep_no >= warn_substeps )
498 std::ostringstream message;
499 message.precision(10);
501 message <<
"Many substeps while trying to locate intersection." <<
G4endl
502 <<
" Undertaken length: "
504 <<
" - Needed: " << substep_no <<
" substeps." <<
G4endl
505 <<
" Warning level = " << warn_substeps
506 <<
" and maximum substeps = " << max_substeps;
507 G4Exception(
"G4SimpleLocator::EstimateIntersectionPoint()",
510 return !there_is_no_intersection;
G4FieldTrack ReEstimateEndpoint(const G4FieldTrack &CurrentStateA, const G4FieldTrack &EstimtdEndStateB, G4double linearDistSq, G4double curveDist)
void SetPosition(G4ThreeVector nPos)
G4double GetCurveLength() const
CLHEP::Hep3Vector G4ThreeVector
G4ThreeVector GetSurfaceNormal(const G4ThreeVector &CurrentInt_Point, G4bool &validNormal)
G4bool IntersectChord(const G4ThreeVector &StartPointA, const G4ThreeVector &EndPointB, G4double &NewSafety, G4double &PreviousSafety, G4ThreeVector &PreviousSftOrigin, G4double &LinearStepLength, G4ThreeVector &IntersectionPoint, G4bool *calledNavigator=0)
G4FieldTrack ApproxCurvePointV(const G4FieldTrack &curveAPointVelocity, const G4FieldTrack &curveBPointVelocity, const G4ThreeVector ¤tEPoint, G4double epsStep)
const G4ThreeVector & GetMomentumDir() const
static const G4double tolerance
void printStatus(const G4FieldTrack &startFT, const G4FieldTrack ¤tFT, G4double requestStep, G4double safety, G4int stepNum)
G4bool EstimateIntersectionPoint(const G4FieldTrack &curveStartPointTangent, const G4FieldTrack &curveEndPointTangent, const G4ThreeVector &trialPoint, G4FieldTrack &intersectPointTangent, G4bool &recalculatedEndPoint, G4double &fPreviousSafety, G4ThreeVector &fPreviousSftOrigin)
G4double GetEpsilonStepFor()
G4ThreeVector GetPosition() const
G4GLOB_DLL std::ostream G4cout
void ReportTrialStep(G4int step_no, const G4ThreeVector &ChordAB_v, const G4ThreeVector &ChordEF_v, const G4ThreeVector &NewMomentumDir, const G4ThreeVector &NormalAtEntry, G4bool validNormal)
G4Navigator * GetNavigatorFor()
void G4Exception(const char *originOfException, const char *exceptionCode, G4ExceptionSeverity severity, const char *comments)
#define fPreviousSftOrigin
G4bool GetAdjustementOfFoundIntersection()
G4double fiDeltaIntersection
G4ChordFinder * GetChordFinderFor()
virtual void LocateGlobalPointWithinVolume(const G4ThreeVector &position)
G4bool AdjustmentOfFoundIntersection(const G4ThreeVector &A, const G4ThreeVector &CurrentE_Point, const G4ThreeVector &CurrentF_Point, const G4ThreeVector &MomentumDir, const G4bool IntersectAF, G4ThreeVector &IntersectionPoint, G4double &NewSafety, G4double &fPrevSafety, G4ThreeVector &fPrevSftOrigin)
G4SimpleLocator(G4Navigator *theNavigator)
G4ThreeVector GetMomentumDirection() const