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<div class="moz-cite-prefix">Is it possible that p0=p4, p1=p5 etc? <br>
In that case you're looking at a zero volume hex and detDf should
be zero. Alu can't handle the case.<br>
of degenerate elements.<br>
Andreas<br>
<br>
On 20/11/15 11:20, Jelena Grižić wrote:<br>
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<div>Hi,<br>
<br>
</div>
I added variable p to the output. Again, I'm sending only
the part where the error occurs (the whole output is too
big).<br>
<br>
</div>
Thank you.<br>
<br>
</div>
Best regards,<br>
<br>
</div>
Jelena<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-11-18 12:00 GMT+01:00 <span
dir="ltr"><<a moz-do-not-send="true"
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target="_blank">dune-request@dune-project.org</a>></span>:<br>
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Today's Topics:<br>
<br>
1. Re: Dune Digest, Vol 125, Issue 7 (Andreas Dedner)<br>
<br>
<br>
---------- Proslijeđena poruka ----------<br>
From: Andreas Dedner <<a moz-do-not-send="true"
href="mailto:a.s.dedner@warwick.ac.uk">a.s.dedner@warwick.ac.uk</a>><br>
To: <<a moz-do-not-send="true"
href="mailto:dune@dune-project.org">dune@dune-project.org</a>><br>
Cc: <br>
Date: Tue, 17 Nov 2015 17:12:13 +0000<br>
Subject: Re: [Dune] Dune Digest, Vol 125, Issue 7<br>
<div text="#000000" bgcolor="#FFFFFF">
<div>I just realized that the TrilinearMap class does not
only store the a[.][.] (which describes the actual
mapping) but<br>
also the actual coordinates of the cube in
p0,p1,p2,p3,p4,p5,p6,p7.<br>
Having those of the offending cube would actually be
even more interesting. So if you could add those to your
output<br>
that would simplify figuring out what the problem is.<br>
Andreas<br>
<br>
On 17/11/15 16:02, Andreas Dedner wrote:<br>
</div>
<blockquote type="cite">
<div>Hi.<br>
To get that output of detDf and a[i][j] you must have
added some lines to the code - could you send me the
corresponding<br>
diff.<br>
Andreas<br>
<br>
On 17/11/15 15:44, Jelena Grižić wrote:<br>
</div>
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<div>
<div>Dear all,<br>
<br>
</div>
my last mail was too big for some mailservers,
so I'm sending attachment only containing
relevant information.<br>
<br>
<br>
</div>
Thanks!<br>
<br>
<br>
</div>
Best regards,<br>
<br>
</div>
Jelena Grižić<br>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2015-11-13 13:09 GMT+01:00
Jelena Grižić <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:jelena.grizic@gmail.com"
target="_blank">jelena.grizic@gmail.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0
0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div dir="ltr">
<div>
<div>Hi Andreas,<br>
<br>
</div>
file with all requested information is in
the attachment. I'm using module
dune-alugrid.<br>
</div>
<div>I can also share dgf file on Google Disc
or Dropbox, if necessarily.<br>
<br>
<br>
</div>
<div>Thank you!<br>
<br>
</div>
<div>Best regards,<br>
<br>
</div>
<div>Jelena <br>
</div>
</div>
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<div>2015-11-13 12:00 GMT+01:00 <span
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Today's Topics:<br>
<br>
1. dune-alugrid: Assertion `DetDf >
0' failed (Jelena Gri?i?)<br>
2. Re: dune-alugrid: Assertion `DetDf
> 0' failed (Andreas Dedner)<br>
<br>
<br>
---------- Proslijeđena poruka ----------<br>
From: "Jelena Grižić" <<a
moz-do-not-send="true"
href="mailto:jelena.grizic@gmail.com"
target="_blank">jelena.grizic@gmail.com</a>><br>
To: <a moz-do-not-send="true"
href="mailto:dune@dune-project.org"
target="_blank">dune@dune-project.org</a><br>
Cc: <br>
Date: Thu, 12 Nov 2015 18:11:38 +0100<br>
Subject: [Dune] dune-alugrid: Assertion
`DetDf > 0' failed<br>
<div dir="ltr">
<div>
<div>
<div>
<div>
<div>
<div>Dear all,<br>
<br>
<br>
</div>
while constructing mesh from
dgf file, I receive message :<br>
<br>
dune-alugrid/dune/alugrid/3d/mappings_imp.cc:187:
Dune::alu3d_ctype
Dune::TrilinearMapping::det(const
coord_t&): Assertion
`DetDf > 0' failed.<br>
<br>
</div>
Could you explain what that
exactly means and what could be
problem with my mesh?<br>
<br>
</div>
Unfortunately, dgf file is to big
(56,7 MB) to be included in mail.<br>
<br>
<br>
</div>
Thank you.<br>
<br>
</div>
Best regards,<br>
<br>
</div>
Jelena Grižić<br>
</div>
<br>
<br>
---------- Proslijeđena poruka ----------<br>
From: Andreas Dedner <<a
moz-do-not-send="true"
href="mailto:a.s.dedner@warwick.ac.uk"
target="_blank">a.s.dedner@warwick.ac.uk</a>><br>
To: <<a moz-do-not-send="true"
href="mailto:dune@dune-project.org"
target="_blank">dune@dune-project.org</a>><br>
Cc: <br>
Date: Thu, 12 Nov 2015 18:44:49 +0000<br>
Subject: Re: [Dune] dune-alugrid:
Assertion `DetDf > 0' failed<br>
Hi.<br>
The determinant in the alugrid
TrilinearMapping class where the<br>
assertion is triggered, is used to compute
for example the integration<br>
element or the volume of the cells in the
grid. Alugrid assumes a<br>
certain orientation of the grid elements
(determinant > 0). I would have<br>
thought that would be checked during the
grid generation process and the<br>
elements local vertex numbering changed if
necessary but you might have<br>
found a bad case here. I would need (at
least):<br>
0) which alugrid type are you using, e.g.,
Cube<3> or Cube<2,3> or...<br>
1) the value of detDf (is it zero or
negative)<br>
2) the call stack for the error<br>
3) The class also contains a variable 'a'
which describes the mapping<br>
and can be used to figure out which
element in your dgf file is<br>
causing the problem<br>
4) If that doesn't work then the dgf
file...<br>
Andreas<br>
<br>
<br>
On 12/11/15 17:11, Jelena Grižić wrote:<br>
> Dear all,<br>
><br>
><br>
> while constructing mesh from dgf
file, I receive message :<br>
><br>
>
dune-alugrid/dune/alugrid/3d/mappings_imp.cc:187:
Dune::alu3d_ctype<br>
> Dune::TrilinearMapping::det(const
coord_t&): Assertion `DetDf > 0'
failed.<br>
><br>
> Could you explain what that exactly
means and what could be problem with<br>
> my mesh?<br>
><br>
> Unfortunately, dgf file is to big
(56,7 MB) to be included in mail.<br>
><br>
><br>
> Thank you.<br>
><br>
> Best regards,<br>
><br>
> Jelena Grižić<br>
><br>
><br>
>
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