smooth-normal.py 文件源码

def index_callback(self, context):
    scn = context.scene
    if scn.ne_split_mode:
        o = context.active_object   
        bm = bmesh.from_edit_mesh(o.data)
        ensure_lookup_table(bm)  
        index = bm.select_history.active.index
        masked_vertices = get_masked_vertices(context)  

        loop_index = scn.ne_view_normal_index
        to_loops = create_loop_table(o.data)
        if loop_index < len(to_loops[index]):
            o.data.calc_normals_split()
            loop_index = to_loops[index][face_index]
            rotated = o.data.loops[loop_index].normal
            if scn.ne_view_sync_mode:
                mView = get_view_rotational_matrix(True)
                mObject = get_object_rotational_matrix()
                rotated = mView * mObject * rotated
            else:
                rotated = rot_vector(rotated, reverse=True)
            scn.ne_view_normal = rotated