On Fri, Feb 1, 2019 at 9:10 AM Stogner, Roy H <royst...@ices.utexas.edu> wrote:
> > On Fri, 1 Feb 2019, Brandon Denton wrote: > > > I'm currently working through a mesh converter from FEMAP to .xda. Is > there > > a primer for the .xda file format? > > I'm afraid it's even worse than "no primer"; the XDA format changes > without notice. We never really conceived of it as a stable > "standard", just something that could let our users save files without > trashing data (p refinement levels, exotic FE types, whatever) that > might not be supported in pre-existing standards. We add new data > every couple years: nodeset/BC/subdomain names and element unique_id > values in 0.9.2, node unique_id values in 0.9.6, edge and shellface > BCs in 1.1.0, more complicated field width encoding in 0.9.2 and again > in 1.3.0... and we don't even bother adding write options for old > formats, just backwards compatible reads via version string. > > Honestly the easiest way to write a mesh converter would probably be > to write a libMesh MeshInput subclass and use our meshtool app. If > you need something standalone, I'm sorry but the only authoritative > source on the format is src/mesh/xdr_io.C > Of the xda files that are checked in to the repository: examples/adaptivity/adaptivity_ex2/mesh.xda examples/adaptivity/adaptivity_ex3/lshaped.xda examples/adaptivity/adaptivity_ex3/lshaped3D.xda examples/subdomains/subdomains_ex3/hybrid_3d.xda examples/adjoints/adjoints_ex3/H_channel_quads.xda examples/adjoints/adjoints_ex4/lshaped.xda examples/adjoints/adjoints_ex1/lshaped.xda examples/miscellaneous/miscellaneous_ex5/lshaped3D.xda One that was generated relatively recently is: examples/adaptivity/adaptivity_ex3/lshaped.xda so you could probably use that to reverse-engineer most of the current file format. Also, I assume you are only interested in reading mesh data (nodes, elements, connectivity, etc.)? Solution data uses a different file and format from mesh data. -- John _______________________________________________ Libmesh-users mailing list Libmesh-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-users
