reset_selected_verts_to_basis.py

reset_selected_verts_to_basis.py

import bpy

def set_basis_shapekey(ignore_keys=[], ignore_active=False):
    obj = bpy.context.active_object

    if obj.type != 'MESH':
        print("Active object is not a Mesh")
        return

    if len(obj.data.shape_keys.key_blocks) < 2:
        print("Not enough shape keys")
        return

    basis_key = obj.data.shape_keys.key_blocks['Basis']
    selected_verts = [v for v in obj.data.vertices if v.select]
    active_key = obj.active_shape_key

    for key in obj.data.shape_keys.key_blocks[1:]:
        if key.name in ignore_keys or (ignore_active and key == active_key):
            print(f"Skipping shape key: {key.name}")
            continue

        print(f"Processing shape key: {key.name}")
        for vert in selected_verts:
            diff_vector = key.data[vert.index].co - basis_key.data[vert.index].co
            key.data[vert.index].co -= diff_vector

# call the function with shape key names to ignore and a flag to ignore the active key
set_basis_shapekey(['shape_key_1', 'shape_key_2'], True)