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Forum: Geometry
Re: Question overlapping volumes with same material (Jean-Pascal Laedermann)
Date: 06 Aug, 2013
From: Alex Leatherland <Alex Leatherland>

Partially overlapping volumes should be avoided in Geant4.

From what I am aware of, the issue is not just what material the particle is traveling within as Geant4 also needs to know: -

+ Which voume is relevant for logging hits (interactions) to + Which volume it needs to check for calculating the distance between the particles location and the volume boundary alomg the current momentum direction.

Would using boolean operations to merge your two overlapping volumes be feasible for your application?


On Tue, 30 Jul 2013 13:21:38 GMT, Jean-Pascal Laedermann wrote:

> Hello,
> It seems that Geant 4 doesn't allow overlaps of two volumes in the same
> mother. But if the volumes are made from the same material, this should
> not be a problem, isn't it?
> Does Geant 4 stop in the intersection or continue with a choice of one
> the volumes ?
> In Geant 3 was a 'MANY' flag for these situations ...
> Best regards.
> Jean-Pascal

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