fix: mesh duplication on export

src/io_scene_vrm/exporter/vrm1_exporter.py

@@ -17,12 +17,14 @@
  Bone,
  Context,
  CopyRotationConstraint,
+ Curve,
  DampedTrackConstraint,
  Image,
  Material,
  Mesh,
  Node,
  Object,
+ VectorFont,
 )
 from mathutils import Matrix, Quaternion, Vector
 
@@ -162,23 +164,23 @@ def save_selected_mesh_compat_objects(self) -> Iterator[Sequence[str]]:
  backup_obj_name = "Backup-Object-" + uuid4().hex
  original_obj_name = obj.name
  backup_obj_name_to_original_obj_name[backup_obj_name] = original_obj_name
+
+ export_obj = obj.copy()
  obj.name = backup_obj_name
+ export_obj.name = original_obj_name
 
  backup_data_name = "Backup-Data-" + uuid4().hex
  original_data_name = None
- obj_data = obj.data
- if obj_data:
- original_data_name = obj_data.name
+ original_data = obj.data
+ if original_data:
+ original_data_name = original_data.name
  backup_data_name_to_original_data_name[backup_data_name] = (
  original_data_name
  )
- obj_data.name = backup_data_name
-
- export_obj = obj.copy()
- export_obj.name = original_obj_name
- export_obj_data = export_obj.data
- if export_obj_data and original_data_name is not None:
+ export_obj_data = original_data.copy()
+ original_data.name = backup_data_name
  export_obj_data.name = original_data_name
+ export_obj.data = export_obj_data
 
  active_layer_objects.link(export_obj)
  export_obj.select_set(True)
@@ -200,6 +202,7 @@ def save_selected_mesh_compat_objects(self) -> Iterator[Sequence[str]]:
  original_obj_name
  )
  if restored_export_obj:
+ restored_export_obj_data = restored_export_obj.data
  restored_export_obj.name = "Export-" + uuid4().hex
  if restored_export_obj.name in active_layer_objects:
  active_layer_objects.unlink(restored_export_obj)
@@ -213,6 +216,33 @@ def save_selected_mesh_compat_objects(self) -> Iterator[Sequence[str]]:
  restored_export_obj.users,
  original_obj_name,
  )
+ if restored_export_obj_data is None:
+ pass
+ elif restored_export_obj_data.users <= 1:
+ if isinstance(restored_export_obj_data, Mesh):
+ self.context.blend_data.meshes.remove(
+ restored_export_obj_data
+ )
+ elif isinstance(restored_export_obj_data, Curve):
+ self.context.blend_data.curves.remove(
+ restored_export_obj_data
+ )
+ elif isinstance(restored_export_obj_data, VectorFont):
+ self.context.blend_data.fonts.remove(
+ restored_export_obj_data
+ )
+ else:
+ logger.warning(
+ 'Failed to remove "%s" with %d users. Not implemented.',
+ restored_export_obj_data.name,
+ restored_export_obj_data.users,
+ )
+ else:
+ logger.warning(
+ 'Failed to remove "%s" with %d users',
+ restored_export_obj_data.name,
+ restored_export_obj_data.users,
+ )
 
  restored_obj = self.context.blend_data.objects.get(backup_obj_name)
  if not restored_obj: