Datasmith CAD files import, no data from either Python or BP

MatLitz · September 7, 2022, 5:01pm

Hi!

My goal is to import a .dwg-file into Unreal Engine using Datasmith and then be able to export the data as a .fbx.

I have been following the examples posted in the forums, but none seem to work for me.
Example for Python:

ue4plugins/PythonSamples/blob/main/scripts/ImportExport/Import_CAD_and_re-export_as_FBX_or_OBJ.py

## Code for FBX export
import unreal
 
file_to_import = "C:\\temp\\CAD\\Clutch assembly.SLDASM"
final_fbx_file = "C:\\temp\\my_filename.fbx"
asset_folder = '/Game/MyCADScene'
fbx_destination = '/Game/NEW_MESH'
 
# clear anything existing in the level.
all_actors = unreal.EditorLevelLibrary.get_all_level_actors()
 
for a in all_actors:
    unreal.EditorLevelLibrary.destroy_actor(a)
 
# Construct the Datasmith Scene from a file on disk.
ds_scene_in_memory = unreal.DatasmithSceneElement.construct_datasmith_scene_from_file(file_to_import)
 
print('constructed the scene')
 
if ds_scene_in_memory is None:

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Import example BP and Python:

In both examples the function used to construct DatasmithSceneElement is “construct_datasmith_scene_from_file”, but it says that it needs to read a .udatasmith-file from disk. I want to read a CAD file, which both examples should describe, shouldn’t “construct_datasmith_scene_from_cad_files” be used instead then?

The problem with using the later function is that, when I try to get the options, doesn’t matter if I use get_options, get_import_options or get_all_options, the options is always empty, which makes me believe that there is something wrong in the construction of the DatasmithSceneElement and some information missing when using “construct_datasmith_scene_from_cad_files” or .dwg-files?

What is the next steps I should take to get this working? Is there something I’m missing or is this even possible? UE5 bug?