How to export multiple groups with meshes

Question

I have a kitbash file and I want to export each one of the assets to a seprate fbx file for easy viewing and to ease on my pc since the whole .blend file contains around 15 mil polys.

I was wondering if there is an option in blender python scripting to export multiple groups with the meshes in their groups like in the picture above. so .py operation will make a "KB3D_LAB_AC_A_grp.fbx" file that will contain the files in that group and will do the same for "KB3D_LAB_AC_B_grp" and so on.

or maybe replace or make a new collection for each one of the empties in order to export using collection with the regular collection batch in the fbx export.

Answer 1

import bpy


def export_fbx(context, path: str, name: str):
    ''' Export FBX file.

    path (str) - Filepath to save the file to.
    name (str) - Name of the file.
    '''
    bpy.ops.export_scene.fbx(context,

        filepath = path + name + '.fbx',
        check_existing = True,
        filter_glob = '*.fbx',
        use_selection = True,
    )
    return path + name + '.fbx'


# change 'Collection' to your collection
for object in bpy.data.collections['Collection'].objects:
    if not object.parent:
        override = bpy.context.copy()
        override['selected_objects'] = list(object.children_recursive)

        # set object origin to geometry
        # NOTE: can't undo
        children = [o for o in object.children_recursive if o.type == 'MESH']
        bpy.ops.object.origin_set({
            "object" : children[0],
            "selected_objects" : children,
            "selected_editable_objects" : children,
        })

        # change 'C:\\Users\\karan\\Desktop\\' to your path
        export_fbx(context=override, path=bpy.path.abspath('C:\\Users\\karan\\Desktop\\'), name=object.name)

Added:

# set object origin to geometry
# NOTE: can't undo
children = [o for o in object.children_recursive if o.type == 'MESH']
bpy.ops.object.origin_set({
    "object" : children[0],
    "selected_objects" : children,
    "selected_editable_objects" : children,
})