[Gmsh] how to remiss STL file with Gmsh 4.2.1?

[Christophe Geuzaine]

> On 21 Mar 2019, at 20:03, zxiong at sas.upenn.edu wrote:
> 
> Dear all,
> 
> I am trying to remesh a STL file with Gmsh 4.2.1. I follow the instruction from these two web page:
> http://onelab.info/pipermail/gmsh/2015/009896.html
> http://geuz.org/pipermail/gmsh/2011/006901.html
> But Gmsh told me that ' Compounds entities are deprecated: use Compound meshing constraints instead'. I am new to Gmsh and I don't know how to deal with it. 
> 

Discrete surface remeshing has been rewritten from scratch in Gmsh 4: see tutorial/t13.geo for an example.

As of Gmsh 4.2, it is only applicable to surfaces with small aspect ratios - so currently you would have to split your stl in smaller pieces. We plan to improve this in a future release.

> By the way, I am using OS X(Mac) and I don't know how to run the command 'gmsh -2 remesh.geo' as those two web pages said, I just create a new file and edit script and reload it. I tried to use command line to run the command 'gmsh -2 remiss.geo' but the terminal tells me that no command is called 'gmsh'.
> 
> I attached the stl file I want to remesh. 
> 
> Could you tell me the whole procedure to remesh it? Many thanks!
> 
> Best,
> 
> Zhen
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine