[Gmsh] gmsh 4.0.1 mesh file write bug

[Max Orok]

 Hi Rod,

If Physical Surfaces (Volumes, etc. ) are set, only elements which are part
of a Physical Group are saved in the mesh file.
By setting the Mesh.SaveAll option to 1 (default is 0), you will then save
all elements to the mesh file.

Sincerely,
Max Orok

On Mon, Sep 24, 2018 at 5:28 AM Rob Govers <r.govers at uu.nl> wrote:

> Hi -
>
> I run into the issue that the following commands:
>
> SetFactory("OpenCASCADE");
> Cylinder(1) = {-1, -0, 0, 2, 0, 0, 4, 2*Pi};
> Cylinder(2) = {-1.1, -0, 0, 2.2, 0, 0, 0.5, 2*Pi};
> BooleanDifference{Volume{1}; Delete; }{Volume{2};Delete;}
> Physical Surface(1000) = {4};
>
>
> followed by 3D meshing and write to a .msh file, do not result in a mesh
> file that contain the 3D results. The message console indicates that 204
> nodes and 1029 are generated, they are nicely shown in the GUI, yet the
> saved output file has only 17 nodes and 26 triangular elements. This result
> is the same for different .msh file output formats, so that does not appear
> to be the issue. However, when I leave out the "Physical Surface(1000) =
> {4};”, the mesh file does contain the complete results.
>
>
> Info    : Gmsh version   : 4.0.1
> Info    : Build OS       : MacOSX
> Info    : Build options  : 64Bit Ann Bamg Bfgs Blas(Custom) Blossom Cgns
> DIntegration Dlopen Fltk Gmm Hxt Jpeg(Fltk) Kbipack Lapack(Custom) MathEx
> Med Mesh Metis Mmg3d Mpeg NativeFileChooser Netgen ONELAB ONELABMetamodel
> OpenCASCADE OpenGL OptHom PETSc Parser Plugins Png(Fltk) Post SLEPc Solver
> TetGen/BR Voro++ Zlib
> Info    : Build date     : 20180907
> Info    : Build host     : gmsh.info
> Info    : Packager       : geuzaine
> Info    : Executable     : /Applications/Gmsh.app/Contents/MacOS/gmsh
> Info    : Launch date    : Mon Sep 24 09:35:54 2018
> Info    : Command line   : /Applications/Gmsh.app/Contents/MacOS/gmsh
>
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>


-- 
Max Orok
Contractor
www.mevex.com
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