Now in garment CAD, the armhole curve was shaped by designer to choose some model value points, and was completed by using these model value points to form free-form curve, it has some contrived sense datum. 目前服装CAD中袖笼曲线的形成是通过设计师选定一些型值点后,用过型值点的自由曲线完成的,人为经验因素较多。