[Gmsh] HXT failure at the boolean demo with baffles

[Christophe Geuzaine]

> On 25 Jan 2020, at 21:19, andrew <armitatz at gmail.com> wrote:
> 
> 
> Hi,
> 
> When I try to mesh the boolean demo file 'baffles.geo' the HXT algorithm fails with the message '... not matching BREP volume' with the latest stable release (4.5.1). When the same geometry is not created with baffles (that have a zero thickness) but with boxes that don't have zero thickness everything goes well.
> 

This is normal. From the doc: "The “Delaunay” algorithm is currently the most robust and is the only one that supports embedded model entities, the Field mechanism to specify element sizes (see Specifying mesh element sizes) and the automatic generation of hybrid meshes with pyramids."

HXT will eventually support these features, but there's no timeline for this yet.

Christophe

> Is there a possibility to make HXT algorithm to work correctly with zero width internal surfaces?
> 
> kind regards
> 
> andrew tsiantis
> 
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine