|Message: Re: G4Polyhedra: Warnings from geometry test.||Not Logged In (login)|
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Hi Huamin, > We got similar warnings when we used the solid G4TwistedTubs > which is a kind of polyhedra. let me point out first that G4TwistedTubs and G4Polyhedra have really nothing in common, they're two completely different solids codes (and geometrical shapes!). If you noticed a misbehavior in tracking and you're sure that your geometry setup is correct it would be useful if you open a bug report providing all the elements necessary to reproduce the problem; there exists a bug reporting system for this. Making free statements in a public forum does not help. As for the problem reported by the built-in overlap checking command, this doesn't necessarily mean it is a problem in the solid. It was already reported (and there's a problem report open for it) cases of incorrect diagnosis of the built-in overlap checking command, under some circumstances. It is useful to have simple test cases like the one reported here for the polyhedra in order to verify the origin of the problem. To verify overlaps I would suggest to use also the tool introduced recently in Geant4 for the overlaps checking at construction, and/or the DAVID tool. Cheers, Gabriele
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