This paper presents shape-preserving algorithm, the cubic parametrical curve is constructed between two cosecute data points, the resulted interpolating spline curve is local, shape-preserving and G2-continuous.
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唐渝,黄国立,王兴波. CAD 中的保形曲线拟合[J].国防科技大学学报,1997,19(2):95-99. Tang Yu, Huang Guoli, Wang Xingbo. Shape-Preserving Curve Fitting in CAD[J]. Journal of National University of Defense Technology,1997,19(2):95-99.