在CAD中，用分段三次B样条来表达自由曲线是很理想的，为此，采用三次B样条曲线来拟合这条折线. ... 其中， 3d.gif (1661 bytes) ，确定了系数a、b、c，相应地就确定了拟合函数. 3)确定型值点求出拟合函数后，取点Pk((1/2)l，yp)作为型值点. ...

-in CAD, and cubic B-spline curves to the freedom of expression would be the ideal, for cubic B-spline curve fitting of the dogleg. them .... 3d.gif (1661 bytes), to determine the coefficients a, b, c, corresponding to determine a fitting function. 3) to determine the value was calculated - fitting function, collocation Pk ((1 / 2) l, yp) as the data points. ...