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On 14/05/24 1: 44 pm, Matthew Knepley wrote: I wish GMsh was clearer about what is optional: https: //gmsh. info/doc/texinfo/gmsh. html#MSH-file-format They do talk about it, but not exhaustively. GMsh always writes and $Entities block from what
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<p>On 14/05/24 1:44 pm, Matthew Knepley wrote:</p>
<blockquote type="cite" cite="mid:CAMYG4Gk+PEZoZueftO_rdNp-krvJPE-YBpKpBT5EzbSCyAkkPg@mail.gmail.com">
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<div class="gmail_quote">I wish GMsh was clearer about what is
optional: <a href="https://urldefense.us/v3/__https://gmsh.info/doc/texinfo/gmsh.html*MSH-file-format__;Iw!!G_uCfscf7eWS!aCypJMAzwWHAJLXGNJmSthDjbHcU-8_MdsaXZ4d1r1RKyL0bqIv5ZuLmQtV6ve4XcTjapf38-bsdDOLEDAlhWoaaGpmjDCYs$" moz-do-not-send="true">https://gmsh.info/doc/texinfo/gmsh.html#MSH-file-format</a>
<div>They do talk about it, but not exhaustively. GMsh always
writes and $Entities block from what I can tell.</div>
<div>I can make it optional, it just might take until after
the PETSc Meeting.</div>
</div>
</div>
</blockquote>
<p>Looks like $Entities are optional:</p>
<p><a class="moz-txt-link-freetext" href="https://urldefense.us/v3/__https://gitlab.onelab.info/gmsh/gmsh/-/commit/b5feba2af57181ffa946d3f0c494b014603c6efa__;!!G_uCfscf7eWS!aCypJMAzwWHAJLXGNJmSthDjbHcU-8_MdsaXZ4d1r1RKyL0bqIv5ZuLmQtV6ve4XcTjapf38-bsdDOLEDAlhWoaaGjNKbSSU$">https://gitlab.onelab.info/gmsh/gmsh/-/commit/b5feba2af57181ffa946d3f0c494b014603c6efa</a><br>
</p>
<p>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.</p>
<p>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.</p>
<p>- Adrian<br>
</p>
<pre class="moz-signature" cols="72">--
Dr Adrian Croucher
Senior Research Fellow
Department of Engineering Science
Waipapa Taumata Rau / University of Auckland, New Zealand
email: <a class="moz-txt-link-abbreviated" href="mailto:a.croucher@auckland.ac.nz">a.croucher@auckland.ac.nz</a>
tel: +64 (0)9 923 4611</pre>
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