＃1097

[gisspace]

fix：IFC file conversion obj file, some cases will be rotated 90 °

[aothms]

Many thanks and sorry for the delay. Overall this looks pretty good, but I'll make a couple of changes after merging:

• I'll change the argument to --y_up and keep the default at Z-up. We can't change behaviour so drastically and to keep consistent with other serializers.
• I'll make a note that it's only applicable to the OBJ serializer. It's not hard to apply to others, but I also don't really see a reason, with Collada for example the convention is documented in the file.

[aothms]

Oh and I changed the conversion to < X Z -Y > in that case it matches the [-Z FORWARD Y UP] default in Blender. Can you double check?