Keywords: cgx

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# File Formats

The following file-formats to store or read geometric entities are available:

- fbd-format, this format consists of a collection of commands explained in the section ``Commands'' and it is mainly used to store geometrical information like points, lines, surfaces and bodies. But it can also be used to define a batch job.
- stl-format, this format describes a shape using only triangles (see the read command to handle edges generated by NETGEN).

Common CAD formats will be supported by stand-alone interfaces which translate into fbd-commands.
The following file-formats can be written to define the mesh and certain boundary-conditions:

- Abaqus, which is also used by the CalculiX solver ccx,
- Ansys,
- Code Aster,
- duns, a free cfd-code [5],
- isaac, a free cfd-code [6],
- OpenFOAM, a free cfd-code [7] (So far, only 8-noded brick-elements are supported),
- Nastran,
- tochnog, a free fem-code [8] (So far, only 8-noded brick-elements are supported).

The following solver-input-file-format can be read to check the mesh and certain boundary-conditions:

- Abaqus, this is also used by the CalculiX solver ccx.

The following file-formats to read solver results are available:

- frd-format, files of that format are used to read results of previous calculations like displacements and stresses. This format is described in section ``Result Format'' and is also used by ccx.
- duns, a free cfd-code [5],
- isaac, a free cfd-code [6],
- OpenFOAM, a free cfd-code [7].

For a closer description how to read this formats see ``Program Parameters'' and how to write them see the ``send'' command.

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