Is it possible to only build meshlabserver?

[Sea421]

Hi team,

I would like you use meshlabserver on my server to convert obj file to u3d.
I just wondering is it possible to only build or install meshlabserver without whole meshlab?

Thanks

[alemuntoni]

MeshLab has a plugin architecture, therefore you could build just what you need;

• external/u3d
• common
• meshlabserver
• meshlabplugins/io_u3d

Cmake allows to select which targets to build.

---

However, to convert u3d files (until u3d exporter will not work in PyMeshLab), I suggest to use the following pipeline:

• convert your file to IDTF format using pymeshlab
• use this converter to convert from IDTF to u3d.

[Sea421]

Thank you very much. u3d conversion works fine on my local ubuntu 18.04. (pymeshlab v0.1.16)
But in docker (ubuntu 18.04), it returns following error:

Must construct a QGuiApplication first.
Exit code = 80000000
QWidget: Must construct a QApplication before a QWidget
Aborted (core dumped)

I have install u3d on my local machine and docker. But it works fine in my local machine, also give Exit code = 80000000 error on docker.

Do I need to set configuration on server, or is there headless version of pymeshlab on server?

My code:

import pymeshlab as ml

ms = ml.MeshSet()
ms.load_new_mesh("my_file.ply")
ms.save_current_mesh("my_file.u3d")
ms.save_current_mesh("my_file.idtf")

IDTFConverter -input my_file.idtf -output my_file.u3d

Thanks again

[alemuntoni]

I really don't know why the u3d converter does not work on server.
Be sure that, with the converter, also the other IFX libraries are in the same folder of the converter.
Unfortunately the IDTF converter is a total mess that loads internally the libraries instead of linking them, therefore something may go wrong during this loading... See cnr-isti-vclab/PyMeshLab#25

[Sea421]

I have solved the issue. The issue was IDTFConverter is using the en_US.UTF-8 locale. But, in my docker container, the en_US.UTF-8 locale was missing. So, I installed the locale.

apt-get -y install locales
sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen

For, u3d library, the error occurred because of it can't find .so files. So I have copied built so files to /usr/lib/

cp libIDTF.so /usr/local/lib/
cp libIFXCoreso /usr/local/lib/
cp libIFXExporting.so /usr/local/lib/
cp libIFXImporting.so /usr/local/lib/
cp libIFXScheduling.so /usr/local/lib/

Thanks for great tool pymeshlab & meshlab. It is really saving my work.

[ghost]

@Sea421, thanks for the tip! It was indeed the missing locale setting that was breaking IDTFConverter on the Ubuntu image.