Error when creating asset bundles from .fbx models, .obj file fails to be created

[Chris-Mietzsch]

Hi,

I am trying to use the first script for the asset bundle creator:

from pathlib import Path
from tdw.asset_bundle_creator.model_creator import ModelCreator
from tdw.backend.paths import EXAMPLE_CONTROLLER_OUTPUT_PATH

output_directory = EXAMPLE_CONTROLLER_OUTPUT_PATH.joinpath("local_object")
print(f"Asset bundles will be saved to: {output_directory}")
ModelCreator().source_file_to_asset_bundles(name="paper_towels",
                                            source_file=Path("paper_towels.fbx").resolve(),
                                            output_directory=output_directory)

and get the following error:

(.venv) christiane@christianes-air TDW % /Users/christiane/Prog/TDW/.venv/bin/python /Users/christiane/Prog/TDW/fbx-to-prefab.py
Your version of the Asset Bundle Creator Unity project is up to date: 2.0.7
Started log at: 02/20/24 13:04:55
Creating a prefab.
Trying to get or create a visual mesh file.
Loaded GameObject at: Assets/source_files/pan/pan.fbx
Setting import options for: pan
Import mode: LegacyImport
Material location: External
Mesh readability: False
Mesh scale: 1
Trying to get or create a collider mesh file.
Source file is a: .fbx... Converting now to a .obj...
Launched: /Users/christiane/asset_bundle_creator/executables/Darwin/assimp/assimp export "/Users/christiane/Prog/TDW/pan.fbx" "/Users/christiane/asset_bundle_creator/Assets/source_files/pan/pan.obj"
Done!
Error! Failed to create: /Users/christiane/asset_bundle_creator/Assets/source_files/pan/pan.obj
UnityEngine.Debug:LogError (object)
MeshConverter:FileExists (string) (at Assets/Scripts/Editor/MeshConverter.cs:329)
MeshConverter:Assimp (SourceFile,string,string&) (at Assets/Scripts/Editor/MeshConverter.cs:220)
MeshConverter:CreateHullCollidersMesh (SourceFile,int,single,string[]&) (at Assets/Scripts/Editor/MeshConverter.cs:121)
ModelCreator:CreatePrefab () (at Assets/Scripts/Editor/AssetBundleCreator/ModelCreator.cs:178)
AssetBundleCreator`2<ModelCreator, ModelRecord>:SourceFileToPrefab () (at Assets/Scripts/Editor/AssetBundleCreator/AssetBundleCreator.cs:200)


Started log at: 02/20/24 13:26:29
Creating a prefab.
Trying to get or create a visual mesh file.
Loaded GameObject at: Assets/source_files/pan/pan.fbx
Setting import options for: pan
Import mode: LegacyImport
Material location: External
Mesh readability: False
Mesh scale: 1
Trying to get or create a collider mesh file.
Source file is a: .fbx... Converting now to a .obj...
Launched: /Users/christiane/asset_bundle_creator/executables/Darwin/assimp/assimp export "/Users/christiane/Prog/TDW/pan.fbx" "/Users/christiane/asset_bundle_creator/Assets/source_files/pan/pan.obj"
Done!
Error! Failed to create: /Users/christiane/asset_bundle_creator/Assets/source_files/pan/pan.obj
UnityEngine.Debug:LogError (object)
MeshConverter:FileExists (string) (at Assets/Scripts/Editor/MeshConverter.cs:329)
MeshConverter:Assimp (SourceFile,string,string&) (at Assets/Scripts/Editor/MeshConverter.cs:220)
MeshConverter:CreateHullCollidersMesh (SourceFile,int,single,string[]&) (at Assets/Scripts/Editor/MeshConverter.cs:121)
ModelCreator:CreatePrefab () (at Assets/Scripts/Editor/AssetBundleCreator/ModelCreator.cs:178)
AssetBundleCreator`2<ModelCreator, ModelRecord>:SourceFileToPrefab () (at Assets/Scripts/Editor/AssetBundleCreator/AssetBundleCreator.cs:200)

When I export my model directly as a .obj file from blender, it works, but it seems that the conversion from .fbx to .obj fails. Am I doing something wrong? (I installed assimp and it still fails, but that shouldn't be necessary?) I am on an M1 macbook air. I would rather not reexport every file to obj ;). Thanks!