typedef int PK_FACE_change_type_t; Types of change operations. Values can be: PK_FACE_change_type_none_c PK_FACE_change_type_offset_c PK_FACE_change_type_taper_c PK_FACE_change_type_transform_c PK_FACE_change_type_replace_c PK_FACE_change_type_blend_c The default value is PK_FACE_change_type_none_c.