Converts a mesh written with gmsh to the exodus II format, which is used in common simulations tools, like Peridigm
Usage:
python convert.py -i input.msh -o output.g -t element_type
element_type is an integer (see Supported gmsh element types section)
- VTK Toolkit >= 5.8 (with python bindings)
The input.msh
file must be generated with Gmsh. Currently, only the following elements are supported:
2D
- 2 = 3-node triangle
- 3 = 4-node quadrangle
3D
- 4 = 4-node tetrahedron
Description of the gmsh format and how it works. An example can be found here. The [brackets] contain comments expanations about each line. More complex files can be found, refer to the gmsh documentation in that case.
$MeshFormat
2.2 0 8
$EndMeshFormat
$Nodes
[The start-tag $Nodes anounces that the nodes are going to be listed]
148
[Number of nodes]
1 2.5 9.5 49.6423745119
[Node number] [Element node point 1] [Elmnt node pt2] [Elmnt node #pt3]
2 2.5 6.5 28.5
3 -2.5 9.5 49.6423745119
4 -2.5 6.5 28.5
...
$EndNodes
[The end-tag $EndNodes anounces that the node list is over]
For detailed information, check this section of gmsh documentation
$Elements
[The start-tag $Elements anounces that the elements are going to be listed]
729
[Number of elements]
1 15 2 0 1 1
[Element number] [Elmnt type] [Elmnt physical entity tag] [Elmnt Geometry point] [Vertex tag]
2 15 2 0 2 2
3 15 2 0 3 3
4 15 2 0 4 4
5 15 2 0 5 5
...
$EndElements
[The end-tag $EndElements anounces that the Elements list is over]
- 1 = 2-node line
- 2 = 3-node line
- 3 = 4-node quadrangle
- 4 = 4-node tetrahedron
- 15 = 1-node point
2D
Mesh generated with gmesh | Exodus geometry visualized with paraview |
---|---|
3D
Mesh generated with gmesh | Exodus geometry visualized with paraview |
---|---|