| Summary: | GeomNav0003, Current Point appears to be Outside mother volume !! | ||
|---|---|---|---|
| Product: | Geant4 | Reporter: | lebrun |
| Component: | tracking | Assignee: | Takashi.Sasaki |
| Status: | RESOLVED INVALID | ||
| Severity: | major | ||
| Priority: | P5 | ||
| Version: | 10.2 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Attachments: | tar file of the stand alone example where G4 tracking produce warnings. | ||
please report only bugs here. Other things should be posted in HyperNews instead. |
Created attachment 406 [details] tar file of the stand alone example where G4 tracking produce warnings. This could be indeed an other aspect of bug 1709. Not sure. The complete output is: *** This is just a warning message. *** -------- WWWW -------- G4Exception-END --------- WWWW ------- -------- WWWW ------- G4Exception-START -------- WWWW ------- *** G4Exception : GeomNav0003 issued by : G4NormalNavigation::ComputeStep() ============================================================ WARNING> Current Point appears to be Outside mother volume !! Response of DistanceToOut was negative or kInfinity when called in G4NormalNavigation::ComputeStep() Current physical volume = Horn1_P Position (loc) = (-128.6019051,310.2952873,906.3475708) Direction (dir) = (0.3235313105,-0.1622727368,0.9321990399) For confirmation: Response of DistanceToOut (loc, +dir)= 9e+99 Response of DistanceToOut (loc, -dir)= 474.1826778 Inside responds = 2 , ie: Inside -- unexpected / inconsistent response ! Obtain safety(ToIn) = 415.2837442 Obtain safety(ToOut) = 143.1607097 Response of DistanceToIn (loc, +dir)= 9e+99 Response of DistanceToIn (loc, -dir)= 9e+99 Exit Normal at loc = (-0.3828699182,0.9238022655,-0) Dir . Normal = -0.2737783283 Checking points moved from position by distance/dir. Solid responses: +eps in direction : kInside +eps in Normal : kInside -eps in direction : kInside -eps in Normal : kInside Parameters of solid: ----------------------------------------------------------- *** Dump for solid - Horn1 *** =================================================== Solid type: G4GenericPolycone Parameters: starting phi angle : 0 degrees ending phi angle : 360 degrees number of RZ points: 9 RZ values (corners): 479.05, 1374.0745 337.95, 1374.0245 337.95, 1464.0255 135.45, 1464.0245 134.45, 1369.0245 33.95, 481.6494999999998 33.95, -1462.9755 449.95, -1463.9755 479.05, -1464.0255 ----------------------------------------------------------- ============================================================ *** This is just a warning message. *** -------- WWWW -------- G4Exception-END --------- WWWW ------- Notes: It does not happen for every track. You'll need to run many tracks. A magnetic field (horn-like, 1/r) is attached to this Horn1 volume. The shape of it is a bit tricky, it has a bulge on the downstream end. I have not studied this in detail, i.e, dependence on momentum, magnetic field in the bulge, etc... Meanwhile, I'll attach the example. This is not what LBNF is running for the simulation of the neutrino beam line, obviously, but it demonstrates. the problem. Questions: Is this problem serious? What is the loss of accuracy ? If not, how can I suppress these warnings?