[Gmsh] Reduce number of digits in key-format file

[Christophe Geuzaine]

> On 19 Mar 2020, at 20:13, Xingsheng Sun <xssun10 at gmail.com> wrote:
> 
> Hello All,
> 
> I am using Gmsh to generate the mesh file for Ls-dyna. The problem is that in the key-format file generated by Gmsh, the coordinates of nodes have too many digits. For instance, in the node information:
> 
> *NODE
> 22, 0, 0.012499999999976, -0.001
> 23, 0, 0.02499999999995, -0.001
> 24, 0, 0.037499999999926, -0.001
> 25, 0, 0.049999999999907, -0.001
> 
> the y-coordinates of nodes 22-25 have 15 digits that cannot be read by Ls-dyna.
> 

What floating point number format should be used in KEY files? Is there a specification of the format somewhere that we could follow?

Christophe

> So could any people shed light on how to reduce the number of digits in Gmsh? I am using command lines, not GUI. Thank you so much in advance.
> 
> Best regards,
> Xingsheng
> 
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— 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine