The file is organised with key words. The comments line must begin with the character .
The "blank", the line return (or <CR>) and the "tabs" are considered as separators.
The file must begin with the keyword MeshVersionFormatted followed by the version number.
This number indicates if the file contains single or double precision reals.
MeshVersionFormatted 1 : file writing with simple precision
MeshVersionFormatted 2 : file writing with double precision
The next keyword is about the space dimension:
Dimension 3
NB :the dimension could be equal to 2 but it is not relevant for Mmg3d .