STL file export, shift coordinates and flip y and z. Intended?

Andy · 11th December 2023, 10:01 AM

The coordinate system change is deliberate (since most stl files use a CAD coordinate system and AC3D doesn't).

The loader will always swap YZ.

There used to be a setting in preferences that switched on/off the swap but since the STL importer is now an ASSIMP one, that doesn't work any more and was removed.

However, the setting for the exporter should still work.

If you edit ac3dprefs.txt (from you home directory) and change the setting for "stl_swap_yz", that should fix the export. But, it will always flip on import.

11th December 2023, 10:01 AM	#2
Andy Administrator Professional user Join Date: Jun 2003 Posts: 4,565	Re: STL file export, shift coordinates and flip y and z. Intended? The coordinate system change is deliberate (since most stl files use a CAD coordinate system and AC3D doesn't). The loader will always swap YZ. There used to be a setting in preferences that switched on/off the swap but since the STL importer is now an ASSIMP one, that doesn't work any more and was removed. However, the setting for the exporter should still work. If you edit ac3dprefs.txt (from you home directory) and change the setting for "stl_swap_yz", that should fix the export. But, it will always flip on import.