On Mon, May 13, 2024 at 10:04 PM Adrian Croucher <a.crouc...@auckland.ac.nz> wrote:
> On 14/05/24 1:44 pm, Matthew Knepley wrote: > > I wish GMsh was clearer about what is optional: > https://urldefense.us/v3/__https://gmsh.info/doc/texinfo/gmsh.html*MSH-file-format__;Iw!!G_uCfscf7eWS!YJN5how37EbmfjwDvfPAsVSCQdWejJn8symxZ83hj94omk6Mh9imh2qOrFqZbsZRM_3W3G5YIn5lZK2KzQlj$ > > They do talk about it, but not exhaustively. GMsh always writes and > $Entities block from what I can tell. > I can make it optional, it just might take until after the PETSc Meeting. > > Looks like $Entities are optional: > > > https://urldefense.us/v3/__https://gitlab.onelab.info/gmsh/gmsh/-/commit/b5feba2af57181ffa946d3f0c494b014603c6efa__;!!G_uCfscf7eWS!YJN5how37EbmfjwDvfPAsVSCQdWejJn8symxZ83hj94omk6Mh9imh2qOrFqZbsZRM_3W3G5YIn5lZMbTrLlQ$ > > > I can also load a GMSH 4.1 file without $Entities into GMSH itself and it > doesn't complain, suggesting that they are indeed optional. > > Yes, but they are not careful to specify when a file can be inconsistent. For instance, omitting the $Entities, but then specifying entity numbers in the $Nodes block. I think they also thought this was inconsistent, but then got user complaints. The minimal example they show does exactly this. > If the $Entities aren't strictly needed for anything in DMPlex (which I'm > guessing they aren't, as the GMSH file format 2.2 doesn't even have them) > then it would be useful not to require them. > I put in some code for this: https://urldefense.us/v3/__https://gitlab.com/petsc/petsc/-/merge_requests/7546__;!!G_uCfscf7eWS!YJN5how37EbmfjwDvfPAsVSCQdWejJn8symxZ83hj94omk6Mh9imh2qOrFqZbsZRM_3W3G5YIn5lZHVFZ3e3$ It just ignores entity numbers when there is no section. Thanks, Matt > - Adrian > > -- > Dr Adrian Croucher > Senior Research Fellow > Department of Engineering Science > Waipapa Taumata Rau / University of Auckland, New Zealand > email: a.crouc...@auckland.ac.nz > tel: +64 (0)9 923 4611 > > -- What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead. -- Norbert Wiener https://urldefense.us/v3/__https://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!YJN5how37EbmfjwDvfPAsVSCQdWejJn8symxZ83hj94omk6Mh9imh2qOrFqZbsZRM_3W3G5YIn5lZFEALcjs$ <https://urldefense.us/v3/__http://www.cse.buffalo.edu/*knepley/__;fg!!G_uCfscf7eWS!YJN5how37EbmfjwDvfPAsVSCQdWejJn8symxZ83hj94omk6Mh9imh2qOrFqZbsZRM_3W3G5YIn5lZFz1kNMU$ >
