FSTL is not able to load stl files in a big endian environment (PowerPC)

[mercurioblu]

I would like to use FSTL on my Debian installation working on a PowerPC CPU and a 64bit linux environment. If I try to load any STL file, FSTL does exactly nothing, it does not show any object, nor provided an alert of any kind that something went wrong. I tried recompiling from source code the current version from this repository, but again FSTL seems to ignore any STL file I select. I might be probably wrong, but it seems to me that STL files I am trying to load with FSTL are encoded as little endian and the FSTL loader is not able to detect that it is running on a big endian system.

[DeveloperPaul123]

Would you be able to share the file that fstl cannot load?

[mboerwinkle]

Also, a few other things that might be interesting: -Can you load this (Sphericon.stl) ascii STL? -What Debian port are you using? You say it is big endian, but https://www.debian.org/ports/ only lists little endian PPC as currently supported. Thanks, Martin

[mkeeter]

We copy directly from the binary file into a float here. You can try editing that line to something like

qFromLittleEndian<float>(b, 3, &v[i]);

and seeing if that fixes it.

[mercurioblu]

Here the file I am trying to load, zipped as GitHub does not allow to upload an stl file directly flat.zip

[mercurioblu]

@mboerwinkle Yes, I can see the file "Sphericon.stl"

The following is the dump of my /etc/apt/sources.list

# Repos managed by Debian ports
deb http://ftp.ports.debian.org/debian-ports/ sid main 
deb-src http://ftp.debian.org/debian/ sid main 
deb [arch=all] http://ftp.debian.org/debian/ sid non-free contrib main 
# Repo managed by PowerProgressCommunity
deb [arch=ppc64] https://repo.powerprogress.org/debian/ sid main 

[mkeeter]

Did you try the fix I suggested here?

[mercurioblu]

@mkeeter Hurray, yes, replacing memcpy(&v[i], b, 3*sizeof(float)); with qFromLittleEndian<float>(b, 3, &v[i]); in src/loader.cpp#L172 did the trick! Thank you!!

Could you please include this fix in the main branch so that Debian will get it in their repositories?

Unfortunately I now have another issue, the file loader dialog does not show up any *.stl file as it did previously and to load files I have to launch fstl from terminal providing the filename to load. On the image below, on left there is fstl installed from Debian repo and on the right the fstl I just compiled from sources with the patch you provided but that does not allow me to load any stl file, do you want me to open another issue about this?

[sur5r]

The version in Debian does not yet include the fix for #59. So I think #60 is the relevant change here. I don't understand yet how it can break like that...

[mkeeter]

Okay, fixed in 843415dccdcf9d15322f84c3e4b2cbd8515283b6.

Please open another issue for the file dialog, but let me ask – what happens if you click on "STL files" in the lower-right corner of the file dialog? If that opens a dropdown that lets you pick between "STL files" and "*.stl", then it's probably your shell (GNOME?) behaving strangely.