三次Ｂ样条曲线是曲线学中一个重要的部分，它不但保留了Bezier曲线的优点，而且克服了其不具备局部性质的缺点，能更好地表示与设计自由型曲线曲面，通过几个控制点的移动能形成不同的曲线．-Three B-spline curve learning curve is an important part, it not only retains the advantages of Bezier curves, but do not have to overcome the local nature of