Mesh Data FormatΒΆ

Hermes3D can read meshes in a native format and in ExodusII format. For the former, use

// Load the mesh file.
Mesh mesh;
H3DReader mloader;
mloader.load("domain.mesh", &mesh);

at the beginning of your main.cpp file. To load an ExodusII mesh file, use ExodusIIReader class instead of “H3DReader”.

Below is a sample mesh file containing a single hex element. Note the ordering of vertices in elements and on faces. Also note that indices start from 1 and that elements do not have material markers as in Hermes2D. We are going to resolve both these incompatibilities soon:

# vertices
8
-1 -1  -1
 1 -1  -1
 1  1  -1
-1  1  -1

-1 -1   1
 1 -1   1
 1  1   1
-1  1   1

# tetras
0

# hexes
1
1 2 3 4 5 6 7 8

# prisms
0

# tris
0

# quads
6
1 2 3 4             5
1 2 6 5             3
2 3 7 6             2
3 4 8 7             4
4 1 5 8             1
5 6 7 8             6

In the quads section, the last number on each line is a boundary marker as the reader expects.

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