Mmg3d with strong anisotropic mesh

User Help
#1

Hi

I don’t know what to do…mmg3d crashes when performing anisotropic adaptation to a solution (exported using freefem)

The geometry is about 2 walls with layers and 1 slab, that’s whay some layers are thin. Here the zip file which contains the mesh file, the metric and solution scalar field, and also the freefem script in case of.

mmd3d.exe temp.mesh -sol metric.sol -hgrad 3

– PHASE 2 : ANISOTROPIC MESHING
Assertion failed: MG_GET(pxt1->ori,voyq ), file C:/builds/workspace/deployEXE/3rdparty/ff-petsc/petsc-3.15.0/fr/externalpackages/git.mmg/src/mmg3d/colver_3d.c, line 1131
Unexpected error: *** potential lack of memory.

-sol needs the metric (metric.sol, generated with mshmet) or the solution (in my case solution.sol contains the temperature) ?

Thank you for helping.

adapt3d.zip (184.2 KB)

#2

Hello,
The usage is right (only the metric needs to be passed) and I can reproduce the problem also on a Mac system, we are looking at why it happens.

Are you using a debug version of Mmg on purpose? Your test is failing in a check that is present only in the debug version, while it seems to work fine in the optimized one (we are also checking if this behaviour is correct).

Yours,
Luca

#3

Hello Luca, thanks for answering. I use the official binaries 5.5.2 from the website…
image

#4

Hello,
Thanks! I don’t get the failed assertion with the binaries downloaded from github…
Anyway this failed assertion shows an error, we are testing a fix for it right now.
We will come back to you shortly.

Yours,
Luca