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Hi Iulian,</div>
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Yes I am trying to create an element made from single vertex.</div>
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I want to used these for Material Point Method.</div>
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So there is a way of creating the vertices, but not adding connectivity to themselves only?</div>
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Or may be another way round?</div>
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If not, don't worry about. Will create a vtk writer to do this and hopefully moab can use the vertices.</div>
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Any assistance is really appreciated.</div>
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Kind regards</div>
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Michael</div>
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<div>On 29 Jan 2015, at 17:24, "Grindeanu, Iulian R." <<a href="mailto:iulian@mcs.anl.gov">iulian@mcs.anl.gov</a>> wrote:</div>
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<div style="direction: ltr; font-family: Tahoma; font-size: 10pt; ">Hello,<br>
Moab does not have elements with a single vertex. Is this what you are trying to do?<span class="Apple-converted-space"> </span><br>
A vertex (node) is represented with an entity handle of type MBVERTEX, and you can get coordinates for it<br>
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I am not sure what are you trying to do.<br>
Best Regards,<br>
Iulian<br>
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<div id="divRpF966284" style="direction: ltr; "><font size="2" face="Tahoma"><b>From:</b><span class="Apple-converted-space"> </span><a href="mailto:moab-dev-bounces@mcs.anl.gov">moab-dev-bounces@mcs.anl.gov</a> [<a href="mailto:moab-dev-bounces@mcs.anl.gov">moab-dev-bounces@mcs.anl.gov</a>]
on behalf of CORTIS M. [<a href="mailto:michael.cortis@durham.ac.uk">michael.cortis@durham.ac.uk</a>]<br>
<b>Sent:</b><span class="Apple-converted-space"> </span>Thursday, January 29, 2015 10:18 AM<br>
<b>To:</b><span class="Apple-converted-space"> </span><a href="mailto:moab-dev@mcs.anl.gov">moab-dev@mcs.anl.gov</a><br>
<b>Cc:</b><span class="Apple-converted-space"> </span>Tautges, Timothy J.<br>
<b>Subject:</b><span class="Apple-converted-space"> </span>Re: [MOAB-dev] Setting connectivity for single vertex<br>
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Thanks Tim,</div>
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I am still having a problem, may be the guys at Argonne can help with this.</div>
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I've tried a simpler one and trying to crete the vertex from point.</div>
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<div style="margin: 0px; font-size: 12px; "> <span style="font-size: 11px; ">double</span><span class="Apple-converted-space"> </span>points[<span style="font-size: 11px; ">9</span>]={<span style="font-size: 11px; ">0.5</span>,<span style="font-size: 11px; ">0</span>,<span style="font-size: 11px; ">0</span>};</div>
<div style="margin: 0px; font-size: 12px; "> EntityHandle vertex;</div>
<div style="margin: 0px; font-size: 12px; "> rval=moab2.create_vertex(points,vertex);CHKERR_PETSC(rval);</div>
<div style="margin: 0px; font-size: 12px; "> EntityHandle dummy;</div>
<div style="margin: 0px; font-size: 12px; "> rval = moab2.create_element(MBVERTEX,&vertex,<span style="font-size: 11px; ">1</span>,dummy); CHKERR_PETSC(rval);</div>
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But I am getting Error code 2, MB_TYPE_OUT_OF_RANGE !</div>
<div>Is it possible to use MBVERTEX here?</div>
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<div>Thanks,</div>
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<div>Michael</div>
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<div>On 29 Jan 2015, at 15:04, Tim Tautges <<a href="mailto:tautges@mcs.anl.gov" target="_blank">tautges@mcs.anl.gov</a>> wrote:</div>
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<blockquote type="cite">[cc'ng moab-dev list, since I've left Argonne.]<br>
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dummy is 0, which is an invalid handle, but should be the handle(s) of the entities whose connectivity you're setting; I suspect what you want there is *vertices.begin(). And you can't set connectivity until you make an element, so you need to call create_element,
probably with the number of verts per element as 1 and the connectivity just the single vertex defining the point element.<br>
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- tim<br>
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On 01/29/2015 03:34 AM, CORTIS M. wrote:<br>
<blockquote type="cite">Dear Tim,<br>
<br>
I've got the following problem:<br>
<br>
I want to create vertex entities, ie create the points and vertex entities using those points.<br>
So I've create a set of vertices from an array of coordinates.<br>
And If you try to set the connectivity for every point you get Error code 4 (MB_ENTITY_NOT_FOUND).<br>
<br>
This is my code:<br>
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double points[6]={1,0,0, 0,1,0, 0,0,1};<br>
Range vertices;<br>
rval = moab.create_vertices(points,2,vertices); CHKERR_PETSC(rval);<br>
EntityHandle dummy=0;<br>
rval = moab.set_connectivity(dummy,vertexlist,1); CHKERR_PETSC(rval); //Error code 4<br>
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Any suggestions how to overcome this problem.<br>
<br>
Kind regards,<br>
<br>
Michael</blockquote>
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