[Gmsh] .msh file format $Nodes section question

[Johannes Wagner]

I figured this has to do with .msh version 3: 
$ MeshFormat
3 0 8

is there any documentation About That?  It seems to be one the commandline 
default, even though experimental Stated in the gui save menu.  but could 
not find documented anywhere this ...

On Tuesday, March 1, 2016 at 12:01:04 PM UTC + 1, Johannes Wagner wrote:
>
> hey all,
> I have a question regarding the $ Nodes section in the .msh file format. The 
> only information I Could find is the following:
>
> $ Nodes
>  number-of-nodes node-number  x-coord  y-coord  z-coord
> ...
> $ EndNodes
>
>
>
> However, in some of my gmsh generated files .msh I Have Another column following the z-coord integer full of zeros. Does someone know why and what is the purpose? And how come I see them in some of my files, but not all?
>
>
> Thank you!
>
>
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