> On 12 Sep 2018, at 14:31, Guilherme Saturnino <[email protected]> wrote:
> 
> Dear Gmsh developers,
> 
> I'm working on a package called SimNIBS (http://simnibs.org/) that does FEM 
> simulations in human head models. We use gmsh to create tetrahedral meshes 
> from stl surfaces of brain and other tissues. Is there any particular meshing 
> algorithm you would suggest for this application?

I would recommend using the default one.

(Is the quality of the STL meshes sufficient, or do you need to remesh them?)


> What about optimization algorithms? We prefer robustness and quality over 
> speed.

Recent Gmsh versions optimize automatically. We will introduce some fine-tuning 
in the future to change the speed/quality tradeoff ; currently a good 
compromise is hardcoded.

> 
> I would also like to suggest 2 improvements for future Gmsh versions:
> 
> 1. Is it possible to provide Gmsh 4 binaries that are compatible with CentOS 
> 6? It is an old but still widely used Linux distribution. This has been 
> holding us back in adopting Gmsh 4.

The official Linux binaries are compiled on the "old-stable" Debian, in order 
to support even quite old Linux distributions. Can you share the error you get 
on CentOS 6 ?

> 
> 2. Would it be possible in future releases to have more flexible data types 
> in $NodeData and $ElementNodeData? I think it would be very useful to store 
> single-precision floats (to save space) or integers (to have additional 
> labels for elements and nodes) .

Yes, that's indeed in our plans for a future revision of the MSH4 format, 
together with even better handling of very large meshes/datasets.

Thanks for the feedback,

Christophe


> 
> 
> Thanks a lot for putting so much time and effort into making this great piece 
> of software.
> 
> 
> Best Regards,
> 
> Guilherme Saturnino
> 
> 
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine

Free software: http://gmsh.info | http://getdp.info | http://onelab.info


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