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<div class="moz-cite-prefix">Hi,<br>
puh, that's weird:<br>
First I checked my triangles if their area is > 0 (to get the
ones which are aligned). This didn't helped as I said in my last
mail. Now I (just for fun) checked if the area > 0.000000001
and now it works - but I don't know why this is such a
difference?!<br>
<br>
Anyway, thanks for your help!<br>
Steffen<br>
<br>
Am 18.03.2014 10:57, schrieb Zenker, Dr. Matthias:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
Steffen,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">there
are still ill-defined triangles, e.g. 2319, 2320, 2321.
</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">You can find that out by yourself by inspecting
your mesh with gmsh in the way I described in my last mail.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Remark: checking “surface faces” can help to
examine the surface.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">HTH,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Matthias<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<div style="border:none;border-left:solid blue 1.5pt;padding:0cm
0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">Von:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Steffen Becker [<a class="moz-txt-link-freetext" href="mailto:steffenbecker87@yahoo.de">mailto:steffenbecker87@yahoo.de</a>]
<br>
<b>Gesendet:</b> Montag, 17. März 2014 22:39<br>
<b>An:</b> Zenker, Dr. Matthias<br>
<b>Cc:</b> Roman Fratczak; <a class="moz-txt-link-abbreviated" href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>
<b>Betreff:</b> Re: [Gmsh] Error : Self intersecting
surface mesh, computing intersections (this could take
a while)<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Hi Matthias,<br>
<br>
thank you for your help!<br>
I think I successfully deleted all the triangles with zero
surface. Unfortunately the same error still appears (but
at least with much less intersections). You find my new
.msh file in the appendix. Do you have more ideas?<br>
<br>
Regards,<br>
Steffen<br>
<br>
Am 17.03.2014 11:37, schrieb Zenker, Dr. Matthias:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
Steffen,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">I think you have ill-defined triangles in
your mesh. For example, there is a triangle 15328 which
contains the nodes 7358, 7359, and 7360. But these nodes
are aligned, so the triangle has zero surface. I would
suspect this kind of problem to be the cause for the
failure. I discovered that by examining your mesh after
merging the intersect.pos, and by displaying node labels
and surface labels in gmsh. I saw that this triangle was
not visible, just its label, and searched for “15328” in
your msh file to see what nodes it contains.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">You should make sure that this kind of
thing cannot happen when you define the surface mesh.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">HTH,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Matthias</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<div style="border:none;border-left:solid blue
1.5pt;padding:0cm 0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">Von:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Steffen Becker [<a moz-do-not-send="true"
href="mailto:steffenbecker87@yahoo.de">mailto:steffenbecker87@yahoo.de</a>]
<br>
<b>Gesendet:</b> Montag, 17. März 2014 11:20<br>
<b>An:</b> Zenker, Dr. Matthias<br>
<b>Cc:</b> Roman Fratczak; <a
moz-do-not-send="true"
href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>
<b>Betreff:</b> Re: [Gmsh] Error : Self
intersecting surface mesh, computing intersections
(this could take a while)</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Here it is.<br>
<br>
Am 17.03.2014 11:14, schrieb Zenker, Dr. Matthias:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
Steffen,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">I found out: Outlook is wrong.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">I just discovered a small info saying
that Outlook thinks that my_file.msh is insecure and
that it has deleted the attachment (Grrrr). So the
fault was on my side, sorry. Could you try to send
it again with a changed extension, e.g. rename it to
my_file.msh.txt?</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Matthias</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<div style="border:none;border-left:solid blue
1.5pt;padding:0cm 0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">Von:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Steffen Becker [<a moz-do-not-send="true"
href="mailto:steffenbecker87@yahoo.de">mailto:steffenbecker87@yahoo.de</a>]
<br>
<b>Gesendet:</b> Montag, 17. März 2014 10:55<br>
<b>An:</b> Zenker, Dr. Matthias<br>
<b>Cc:</b> Roman Fratczak; <a
moz-do-not-send="true"
href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>
<b>Betreff:</b> Re: [Gmsh] Error : Self
intersecting surface mesh, computing
intersections (this could take a while)</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Hi Matthias,<br>
<br>
I don't know what's wrong here.<br>
When I check my mails, there is a .msh file in the
mail from 12.03.2014 18:21 and also one in the
mail from 14.03.2014 12:33.<br>
Finally, I sent you again a .msh file in this
mail. Do you receive it?<br>
<br>
Steffen<br>
<br>
<br>
Am 17.03.2014 09:52, schrieb Zenker, Dr. Matthias:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Hi Steffen,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">in the mail you mention there is
only a geo file…</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Matthias</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<div style="border:none;border-left:solid blue
1.5pt;padding:0cm 0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">Von:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Steffen Becker [<a moz-do-not-send="true"
href="mailto:steffenbecker87@yahoo.de">mailto:steffenbecker87@yahoo.de</a>]
<br>
<b>Gesendet:</b> Freitag, 14. März 2014
21:09<br>
<b>An:</b> Zenker, Dr. Matthias<br>
<b>Cc:</b> Roman Fratczak; <a
moz-do-not-send="true"
href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>
<b>Betreff:</b> Re: [Gmsh] Error : Self
intersecting surface mesh, computing
intersections (this could take a while)</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Hi Matthias,<br>
<br>
hm, I sent it on 12.03.2014 18:21, don't know
what went wrong.<br>
As you see, I created a ASCII .msh file as
explained in the documentation, so I hope it's
correct.<br>
What can I do now?<br>
<br>
Steffen<br>
<br>
Am 14.03.2014 13:05, schrieb Zenker, Dr.
Matthias:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
Steffen,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">there was no msh file in any of
your mails.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Depending on what is in the msh
file, your steps seem correct to me.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Matthias</span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<div style="border:none;border-left:solid blue
1.5pt;padding:0cm 0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid
#B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">Von:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Steffen Becker [<a
moz-do-not-send="true"
href="mailto:steffenbecker87@yahoo.de">mailto:steffenbecker87@yahoo.de</a>]
<br>
<b>Gesendet:</b> Freitag, 14. März
2014 12:33<br>
<b>An:</b> Zenker, Dr. Matthias<br>
<b>Cc:</b> Roman Fratczak; <a
moz-do-not-send="true"
href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>
<b>Betreff:</b> Re: [Gmsh] Error :
Self intersecting surface mesh,
computing intersections (this could
take a while)</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Hi Matthias,<br>
<br>
I think you are talking about your mail
from 12.03.2014 09:59 ?<br>
In one of my last mails I already sent you
a selfcreated .msh file - but the 3D mesh
still failes. The intersect.pos shows me
some
<o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US">intersections,
but when I check my nodes for duplicates
I can't find any.<br>
</span>Hope my steps are correct:<br>
- create "my_file.msh" with my python
script and check it for nodes duplications
-> none found<br>
- open "my_file.geo" in Gmsh<br>
- do "Modules" -> "Mesh" -> "3D"<br>
- receive error message<br>
- merge "intersect.pos" and see some
intersections but I don't know why because
the are no duplicated nodes<br>
<br>
Steffen<br>
<br>
<br>
Am 14.03.2014 09:50, schrieb Zenker, Dr.
Matthias:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Hi Steffen,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">you should be able to
generate a filled volume mesh if you
follow my suggestion from the other
mail:</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Write the 2D mesh in gmsh
format (e.g. as outerface.msh, gmsh
documentation for more info on the msh
format) and merge that one instead of
the myfile.ply2 file, leaving the other
command lines in your .geo file as they
are. If you then do a 3D mesh, gmsh will
take the 2D mesh as defined in your
file. You can then refine the mesh if
you wish.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">HTH,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Matthias</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span lang="EN-US"> </span><o:p></o:p></p>
<div style="border:none;border-left:solid
blue 1.5pt;padding:0cm 0cm 0cm 4.0pt">
<div>
<div style="border:none;border-top:solid
#B5C4DF 1.0pt;padding:3.0pt 0cm 0cm
0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">Von:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Steffen Becker [<a
moz-do-not-send="true"
href="mailto:steffenbecker87@yahoo.de">mailto:steffenbecker87@yahoo.de</a>]
<br>
<b>Gesendet:</b> Mittwoch, 12.
März 2014 20:00<br>
<b>An:</b> Roman Fratczak<br>
<b>Cc:</b> Zenker, Dr. Matthias; <a
moz-do-not-send="true"
href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>
<b>Betreff:</b> Re: [Gmsh] Error :
Self intersecting surface mesh,
computing intersections (this
could take a while)</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Hi,<br>
<br>
I'm so sorry for all time you spent
with my problem, but now I see: We
talk at cross. It's my fault, I didn't
explained correctly what I need.<br>
I want to receive a *filled* volume
mesh.<br>
I created 2 files (steffen.stl and
steffen2.stl) with my python script.<br>
With steffen.stl I successfully could
create such a filled volume mesh as
seen in steffen.msh.<br>
When I try exactly the same with
steffen2.stl then I get the error
message in the subject (and the
surface mesh doesn't get filled).<br>
So that's why the .iges file you sent
me isn't what I need.<br>
<br>
Sorry for all this confusion,<br>
Steffen<br>
<br>
<br>
Am 12.03.2014 18:53, schrieb Roman
Fratczak:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Steffen,<br>
<br>
I did a volume based on your surface
mesh - see attached IGES (compressed
with 7-zip).<br>
After reading it into GMSH, you can
create the 1D, then 2D and finally
3D mesh with no errors.<br>
<br>
You can do the same using GMSH
volume definition (as already
wrote)-> it will work, as the
fundamental faces are plane
triangles.<br>
<br>
Regards<br>
Roman<br>
<br>
<br>
W dniu 12.03.2014 18:27, Steffen
Becker pisze:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Wrong .geo
file, sorry!<br>
<br>
Am 12.03.2014 18:21, schrieb
Steffen Becker:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Thank you so
far,<br>
<br>
I create both files: .msh and
.geo, but I still get the same
error. What's my mistake?<br>
<br>
Steffen<br>
<br>
Am 12.03.2014 11:48, schrieb
Roman Fratczak:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Hi,<br>
<br>
FYI - you can remove double
vertices/edges (or repair) in
mesh in FreeCad (for exampe).<br>
<br>
regards<br>
Roman<br>
<br>
<br>
<br>
W dniu 12.03.2014 10:17,
Steffen Becker pisze:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Hi
Matthias & Roman,<br>
<br>
I create a nodes- and
elements-list like this:<br>
# nodes:<br>
N1 0,0,0<br>
N2 0,1,0<br>
N3 1,0,0<br>
N4 0,0,1<br>
# elements, which describe
triangles:<br>
E1 1,2,3<br>
E2 2,3,4<br>
<br>
So I do have double edges
(here: between node 2+3).
Didn't now that this is a
problem for gmsh, sorry.<br>
<br>
I will try Romans solution
asap and give you a
feedback.<br>
Thank you both!<br>
<br>
Steffen<br>
<br>
<br>
Am 12.03.2014 09:59, schrieb
Zenker, Dr. Matthias:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Hi
Steffen,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">I am not
totally sure from what you
wrote that there are
really no duplicated
nodes. In gmsh, you need
to define the surfaces in
a way that neighbouring
surfaces/facets with a
common border use the _<i>same</i>_
nodes to define the
border. I could not see
from your file if there
are duplicated nodes, and
would propose that you
make sure that there are
really no such
duplications.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">If the
meshing still fails, then
this is a question for the
real gurus (Christophe?).</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">HTH,</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US">Matthias</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"
lang="EN-US"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
lang="EN-US"> </span><o:p></o:p></p>
<div
style="border:none;border-left:solid
blue 1.5pt;padding:0cm 0cm
0cm 4.0pt">
<div>
<div
style="border:none;border-top:solid
#B5C4DF
1.0pt;padding:3.0pt 0cm
0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US">Von:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"
lang="EN-US"> Roman
Fratczak [<a
moz-do-not-send="true"
href="mailto:fratczakroman@o2.pl">mailto:fratczakroman@o2.pl</a>]
<br>
</span><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">Gesendet:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">
Mittwoch, 12. März
2014 09:51<br>
<b>An:</b> Steffen
Becker<br>
<b>Cc:</b> <a
moz-do-not-send="true"
href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><br>
<b>Betreff:</b> Re:
[Gmsh] Error : Self
intersecting surface
mesh, computing
intersections (this
could take a while)</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Hi
Steffen,<br>
<br>
No it is more clear. If
you are working with
cloud of point, then you
may use Meshlab for
surface regeneration.
There are many software
that are able to handle
in a resonable way the
cloud of points (like
rhino3D + resurf,
other). But these are
rather commercial.<br>
<br>
From the other side -
try to do the simplest
thing:<br>
<br>
Adjust your python
script for surface
creation in order to
save not as PLY but as
GMSH "geo" file using
points and lines<br>
<br>
Point(1)={0,0,0} ;<br>
Point(2)={0,1,0} ;<br>
...<br>
<br>
Line(1) = {1,2};<br>
..<br>
and.. Line Loop &
Surface -> Volume ..<br>
<br>
Then you will get a
volume defined by
geometric entities. In
this case is shoul be
easier to create a
better mesh on surface
and then on whole
volume.<br>
<br>
Regards<br>
Roman<br>
<br>
<br>
<br>
W dniu 11.03.2014 17:59,
Steffen Becker pisze:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Hi,<br>
<br>
@ Roman:<br>
some more details:<br>
I have a point cloud
given and generate the
surface mesh by myself
(with python). I don't
know a good algorithm
to create a volume
mesh out of this
surface mesh - that's
why I use gmsh for
this task.<br>
I also checked my
surface mesh for
double vertexes but I
didn't find any. What
do you mean with
"double egdes"? Isn't
there always a "double
edge", because two
neighbour facets
always have one same
edge?!<br>
<br>
I will send you a
.step or .iges file as
soon as I figured out
how to handle the "No
OpenCASCADE model
found" error.<br>
<br>
I'm appending the
other mailing history
(with Matthias) to
this mail - sorry for
that "double mailing",
I just forgot one time
to "reply to all" -.-<br>
Anyone else has an
idea why the meshing
fails?<br>
<br>
Regards and thank you
a lot,<br>
Steffen<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<o:p></o:p></p>
<pre>Hi Steffen,<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>I don't see either why the meshing fails, sorry.<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>Matthias<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>-----Ursprüngliche Nachricht-----<o:p></o:p></pre>
<pre>Von: Steffen Becker [<a moz-do-not-send="true" href="mailto:steffenbecker87@yahoo.de">mailto:steffenbecker87@yahoo.de</a>]<o:p></o:p></pre>
<pre>Gesendet: Dienstag, 11. März 2014 14:42<o:p></o:p></pre>
<pre>An: Zenker, Dr. Matthias<o:p></o:p></pre>
<pre>Cc: <a moz-do-not-send="true" href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><o:p></o:p></pre>
<pre>Betreff: Re: [Gmsh] Error : Self intersecting surface mesh, computing<o:p></o:p></pre>
<pre>intersections (this could take a while)<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>Oh I'm really sorry, here is the file.<o:p></o:p></pre>
<pre>In addition I sent you also the intersect.pos. I don't understand why exactly<o:p></o:p></pre>
<pre>these surfaces are problematic and the "neighbour surfaces"<o:p></o:p></pre>
<pre>aren't - although they have the same geometry =/<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>Am 11.03.2014 12:07, schrieb Zenker, Dr. Matthias:<o:p></o:p></pre>
<pre>Hi Steffen,<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>if you don't provide the myfile.ply2, we cannot see your geometry...<o:p></o:p></pre>
<pre> You can visualize intersect.pos by merging it to your geometry.<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>HTH,<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre>Matthias<o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<pre> <o:p></o:p></pre>
<p class="MsoNormal">Am
11.03.2014 14:33,
schrieb Roman
Fratczak:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Hello,<br>
<br>
It is possible, that
you will get your
geometry in other
format? <br>
In your "ply" there
is already a surface
mesh given. Try
maybe use STEP,
IGES,... as input-
then it is easer to
recalculate the
surface mesh.<br>
<br>
In case of need of
usage of "a dead
mesh" - maybe try
first to remesh it
(i.e. in blender
with modification
Remesh) and/or clean
it (removing double
vertexes and edges).<br>
<br>
regards<br>
Roman<br>
<br>
<br>
<br>
<br>
W dniu 11.03.2014
12:13, Steffen
Becker pisze:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Hi,<br>
<br>
in the appendix
you find my model.<br>
Thanks for help!!<br>
<br>
Regards,<br>
Steffen<br>
<br>
Am 11.03.2014
11:47, schrieb
Roman Fratczak:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p
class="MsoNormal">Hello
Steffen,<br>
<br>
Yes. You can try
to the first
Optimize quality
of tetra, or all
of them (just
try).<br>
<br>
I don't know how
your model looks
like. If the
elements on the
surface are too
big, then the
solid elements
(probably
tetragonal) may
be with
intersecting
edges or faces.
Therefore the
reducing size of
element may help
(especially on
the surfaces).<br>
<br>
Or- just share
your model (ply)
-in order to be
more precise.<br>
<br>
regards<br>
Roman<br>
<br>
<br>
<br>
W dniu
10.03.2014
18:06, Steffen
Becker pisze:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p
class="MsoNormal">Hi
Roman,<br>
when you say
"enable
option:
optimize", you
mean" Tools
-> Options
-> Mesh
-> Advanced
-> Optimize
quality of
tetrahedra,
Optimize
quality of
tetrahedra
with Netgen,
Optimize high
order meshes
(experimental)"
?<br>
And why is
reducing
element size
important? In
my case it is
important that
the object has
such "90
degree
corners".<br>
<br>
Regards,<br>
Steffen<br>
<br>
Am 10.03.2014
16:55, schrieb
Roman
Fratczak:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p
class="MsoNormal">Hi
Steffen,<br>
<br>
If your volume
is OK (is
really a
closed one) -
try to:<br>
<br>
1. Reduce
element size
(especially in
a curved
shapes)<br>
2. Enable
option
"Optimize" -
in mesh
options <br>
<br>
Regards<br>
Roman<br>
<br>
<br>
<br>
W dniu
10.03.2014
16:41, Steffen
Becker pisze:<o:p></o:p></p>
</div>
<blockquote
style="margin-top:5.0pt;margin-bottom:5.0pt">
<p
class="MsoNormal">Hello
everyone, <br>
<br>
I'm a gmsh
beginner and I
want to create
a 3D volume
mesh out of a
given
surface-mesh
but I got the
error message
as seen in the
subject. You
find my .geo
file in the
appendix.
<br>
Can anyone
tell me what I
have to do to
create a 3D
mesh? I even
can't figure
out where the
intersection
are located
(don't know
how to read
the
intersect.pos).
<br>
Sorry for my
poor english.
<br>
<br>
Regards, <br>
Steffen <br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>gmsh mailing list<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://www.geuz.org/mailman/listinfo/gmsh">http://www.geuz.org/mailman/listinfo/gmsh</a><o:p></o:p></pre>
</blockquote>
<p
class="MsoNormal"><br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>gmsh mailing list<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://www.geuz.org/mailman/listinfo/gmsh">http://www.geuz.org/mailman/listinfo/gmsh</a><o:p></o:p></pre>
</blockquote>
<p
class="MsoNormal"><br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<o:p></o:p></p>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>gmsh mailing list<o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="mailto:gmsh@geuz.org">gmsh@geuz.org</a><o:p></o:p></pre>
<pre><a moz-do-not-send="true" href="http://www.geuz.org/mailman/listinfo/gmsh">http://www.geuz.org/mailman/listinfo/gmsh</a><o:p></o:p></pre>
</blockquote>
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<p class="MsoNormal"> <o:p></o:p></p>
</div>
<p class="MsoNormal"
style="margin-bottom:12.0pt"><br>
<br>
_____________________________________________________________________<br>
ERBE Elektromedizin GmbH<br>
Firmensitz: 72072 Tuebingen<br>
Geschaeftsfuehrer: Christian
O. Erbe, Reiner Thede<br>
Registergericht: Stuttgart
HRB 380137<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"> <o:p></o:p></p>
</blockquote>
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<p class="MsoNormal"> <o:p></o:p></p>
</div>
<p class="MsoNormal"
style="margin-bottom:12.0pt"><br>
<br>
_____________________________________________________________________<br>
ERBE Elektromedizin GmbH<br>
Firmensitz: 72072 Tuebingen<br>
Geschaeftsfuehrer: Christian O. Erbe,
Reiner Thede<br>
Registergericht: Stuttgart HRB 380137<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<p class="MsoNormal"
style="margin-bottom:12.0pt"><br>
<br>
_____________________________________________________________________<br>
ERBE Elektromedizin GmbH<br>
Firmensitz: 72072 Tuebingen<br>
Geschaeftsfuehrer: Christian O. Erbe, Reiner
Thede<br>
Registergericht: Stuttgart HRB 380137<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<br>
_____________________________________________________________________<br>
ERBE Elektromedizin GmbH<br>
Firmensitz: 72072 Tuebingen<br>
Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede<br>
Registergericht: Stuttgart HRB 380137<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<br>
_____________________________________________________________________<br>
ERBE Elektromedizin GmbH<br>
Firmensitz: 72072 Tuebingen<br>
Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede<br>
Registergericht: Stuttgart HRB 380137<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><br>
<br>
_____________________________________________________________________<br>
ERBE Elektromedizin GmbH<br>
Firmensitz: 72072 Tuebingen<br>
Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede<br>
Registergericht: Stuttgart HRB 380137<o:p></o:p></p>
</blockquote>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</div>
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ERBE Elektromedizin GmbH<br>
Firmensitz: 72072 Tuebingen<br>
Geschaeftsfuehrer: Christian O. Erbe, Reiner Thede<br>
Registergericht: Stuttgart HRB 380137<br>
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