生成三次均匀B样条的曲线，可交互的改变关键点的位置，生成新的B样条-Third Generation uniform B-spline curves, interactive key change the location, the new generation of B-Spline

三次非均匀B样条曲线,根据已知点画出一次,二次,三次的B样条曲线-three non-uniform B-spline curves, according to a known point draw, second, third B-spline curves