<div dir="ltr"><div dir="ltr">On Thu, Feb 10, 2022 at 10:12 AM Susanne Claus <<a href="mailto:susanne.claus@onera.fr">susanne.claus@onera.fr</a>> wrote:<br></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif">
<p>Hello,</p>
<p>I am using DMPlex for the mesh structure of a solid mechanics finite element code. I mainly use gmsh as input file format. When I try to read in 8-noded Quadrilaterals (Element type 16 in gmsh) DMPlex tells me that this element type is unknown. However a 9-noded Quadrilateral can be read without problem. On inspecting the plexgmsh.c source code I can see that 8-noded quadrilaterals are deactivated:</p>
<pre style="color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial" width="80"><span style="color:rgb(160,32,240)">#if 0</span>
<a name="m_500319354635037670_line146"></a>146: {20, GMSH_TRI, 2, 3, 3, 9, NULL},
<a name="m_500319354635037670_line147"></a>147: {16, GMSH_QUA, 2, 2, 4, 8, NULL},<br><br><span style="font-family:verdana,geneva,sans-serif;font-size:10pt">For our application these 8-noded quadrilateral are very important. </span></pre>
<pre style="color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial" width="80"><span style="font-family:verdana,geneva,sans-serif;font-size:10pt">Is there any reason why they have not been implemented/deactivated in the dmplex gmsh reader? </span></pre></div></blockquote><div>No, we can handle them in the same way I think. Let me look at it. Hopefully it is easy.</div><div><br></div><div> Thanks,</div><div><br></div><div> Matt</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="font-size:10pt;font-family:Verdana,Geneva,sans-serif"><pre style="color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;word-spacing:0px;text-decoration-style:initial;text-decoration-color:initial" width="80"><span style="font-family:verdana,geneva,sans-serif;font-size:10pt">Thank you for all the great work you are doing. PETSc is amazing. </span><br><br><span style="font-family:verdana,geneva,sans-serif;font-size:10pt">Best wishes,</span><br><span style="font-family:verdana,geneva,sans-serif;font-size:10pt">Susanne Claus </span></pre>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>What most experimenters take for granted before they begin their experiments is infinitely more interesting than any results to which their experiments lead.<br>-- Norbert Wiener</div><div><br></div><div><a href="http://www.cse.buffalo.edu/~knepley/" target="_blank">https://www.cse.buffalo.edu/~knepley/</a><br></div></div></div></div></div></div></div></div>