Version 0.7.0

Purpose: Ensure that empty objects with children are included in the FBX export, preserving the parent-child relationship upon re-import.

Changes:

Handling Empty Objects:

Modified the do_export method to include empty objects in the export process.
Added 'EMPTY' to the ex_object_types set, ensuring that both empty objects and their children are exported together.
Parent-Child Relationship Preservation:

By including empty objects during export, the parent-child hierarchy is maintained when the FBX file is re-imported into Blender or another 3D software.
Material Handling:

Updated the remove_materials method to avoid errors when processing objects without mesh data, such as empty objects.

__init__.py

@@ -1,9 +1,9 @@
 bl_info = {
     "name" : "Batex",
-    "author" : "jayanam",
+    "author" : "jayanam, Rodrigo Camacho (forked from jayanam)",
     "descrtion" : "Batch export as Fbx",
     "blender" : (2, 80, 0),
-    "version" : (0, 6, 0, 0),
+    "version" : (0, 7, 0, 0),
     "location" : "Batex panel",
     "warning" : "",
     "category" : "Import-Export"
@@ -16,17 +16,17 @@
 from . bex_op import *
 from . bex_folder_op import *
 
-bpy.types.Scene.export_folder = StringProperty(name="Export folder", 
-               subtype="DIR_PATH", 
-               description="Directory to export the fbx files into")
+bpy.types.Scene.export_folder = StringProperty(name="Export folder",
+                                               subtype="DIR_PATH",
+                                               description="Directory to export the fbx files into")
 
 bpy.types.Scene.center_transform = BoolProperty(name="Center transform",
-                default=True,
-                description="Set the pivot point of the object to the center")
+                                                default=True,
+                                                description="Set the pivot point of the object to the center")
 
 bpy.types.Scene.apply_transform = BoolProperty(name="Apply transform",
-                default=True,
-                description="Applies scale and transform (Experimental)")
+                                               default=True,
+                                               description="Applies scale and transform (Experimental)")
 
 bpy.types.Scene.export_smoothing = EnumProperty(
     name="Smoothing",
@@ -35,21 +35,21 @@
         ('EDGE', 'Edge', 'Write edge smoothing',0),
         ('FACE', 'Face', 'Write face smoothing',1),
         ('OFF', 'Normals Only', 'Write normals only',2)
-        ),
+    ),
     default='OFF'
-    )
+)
 
 bpy.types.Scene.export_animations = BoolProperty(name="Export Rig & Animations",
-                default=False,
-                description="Export rig and animations")
+                                                 default=False,
+                                                 description="Export rig and animations")
 
 bpy.types.Scene.one_material_ID = BoolProperty(name="One material ID",
-                default=True,
-                description="Export just one material per object")
+                                               default=True,
+                                               description="Export just one material per object")
 
 classes = ( BATEX_PT_Panel, BATEX_OT_Operator, BATEX_OT_OpenFolder )
 
 register, unregister = bpy.utils.register_classes_factory(classes)
-    
+
 if __name__ == "__main__":
     register()

bex_export.py

@@ -29,16 +29,15 @@ def do_center(self, obj):
     return None
 
   def remove_materials(self, obj):
-    if obj.type == 'ARMATURE':
+    # Check if the object has mesh data and is not an armature
+    if obj.type != 'MESH' or obj.data is None:
       return False
 
     mat_count = len(obj.data.materials)
 
     if mat_count > 1 and self.__one_material_id:
-
       # Save material ids for faces
       bpy.ops.object.mode_set(mode='EDIT')
-
       bm = bmesh.from_edit_mesh(obj.data)
 
       for face in bm.faces:
@@ -58,6 +57,7 @@ def remove_materials(self, obj):
     else:
       return False
 
+
   def restore_materials(self, obj):
 
     # Restore the materials for the object
@@ -86,7 +86,7 @@ def do_export(self):
     bpy.ops.object.mode_set(mode='OBJECT')
 
     for obj in self.__export_objects:
-      bpy.ops.object.select_all(action='DESELECT') 
+      bpy.ops.object.select_all(action='DESELECT')
       obj.select_set(state=True)
 
       # Center selected object
@@ -96,31 +96,34 @@ def do_export(self):
       for child in get_children(obj):
         child.select_set(state=True)
 
-      # Remove materials except the last one
-      materials_removed = self.remove_materials(obj)
+      # Include empty objects in the export
+      ex_object_types = {'MESH', 'EMPTY'}
 
-      ex_object_types = { 'MESH' }
-
-      if(self.__export_animations):
+      if self.__export_animations:
         ex_object_types.add('ARMATURE')
 
-      # Export the selected object as fbx
-      bpy.ops.export_scene.fbx(check_existing=False,
-      filepath=self.__export_folder + "/" + obj.name + ".fbx",
-      filter_glob="*.fbx",
-      use_selection=True,
-      object_types=ex_object_types,
-      bake_anim=self.__export_animations,
-       bake_anim_use_all_bones=self.__export_animations,
-      bake_anim_use_all_actions=self.__export_animations,
-      use_armature_deform_only=True,
-      bake_space_transform=self.__apply_transform,
-      mesh_smooth_type=self.__context.scene.export_smoothing,
-      add_leaf_bones=False,
-      path_mode='ABSOLUTE')
+      # Remove materials except the last one
+      materials_removed = self.remove_materials(obj)
+
+      # Export the selected object and its children as fbx
+      bpy.ops.export_scene.fbx(
+        check_existing=False,
+        filepath=os.path.join(self.__export_folder, f"{obj.name}.fbx"),
+        filter_glob="*.fbx",
+        use_selection=True,
+        object_types=ex_object_types,
+        bake_anim=self.__export_animations,
+        bake_anim_use_all_bones=self.__export_animations,
+        bake_anim_use_all_actions=self.__export_animations,
+        use_armature_deform_only=True,
+        bake_space_transform=self.__apply_transform,
+        mesh_smooth_type=self.__context.scene.export_smoothing,
+        add_leaf_bones=False,
+        path_mode='ABSOLUTE'
+      )
 
       if materials_removed:
         self.restore_materials(obj)
 
       if old_pos is not None:
-        set_object_to_loc(obj, old_pos)
+        set_object_to_loc(obj, old_pos)