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Forum: Geometry
Re: Question Overlaps from CAD Export (Victor Kai)
Date: 07 Jul, 2011
From: Norman Graf <Norman Graf>

Hello Victor,
 Not knowing anything about the complexity of your geometry I can't
directly address the issue of how best to resolve your overlaps. 
 I assume you exported your CAD geometry as a STEP file. If you are 
exporting a faceted version of your geometry (instead of BREPs) I can
understand that you might be getting artificial overlaps.

But to answer your specific questions:

> Is there a simple and automated way to fix these overlap errors
> with only the GDMLs? 

No. 
There are several tools available to identify and highlight these
overlaps, but there is no way to fix them automatically.

> Also, will these overlaps cause problems in our simulations down the
> road if they are left unfixed?

Yes, very definitely. The code will not necessarily crash, but overlaps
lead to undefined behavior in the overlap regions, meaning the results
of your simulation cannot be trusted. They are not necessarily wrong, but
you have no way of knowing that.


> Thank you in advance. 
I'm sorry I can't be of more assistance without more information.

Norman Graf

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