A method for complicated planar contour fitting is presented : 1 ) first all the data points used in the contour are ordered ; 2 ) after calculating the curvature of each contour point , the points with bigger curvature are taken as feature points ; 3 ) the contour is segmented by feature points ; 4 ) the contour is globally constructed through determining the segments types ( line or circle ) and the constraints with the neighbor segments ? the generation of skin surface is realized with the interface of caa 研究了基于点云数据的复杂截面线生成技术： 1 )对轮廓数据点进行排序； 2 )近似计算轮廓数据点处的曲率，取出曲率较大的数据点，并定义取出的数据点为特征点； 3 )以特征点为分界点对轮廓数据点进行分段： 4 )判断分段数据点确定的曲线类型和各分段曲线之间的约束关系，进行基于约束的分段平面轮廓曲线整体拟合。
By this solution , a balde body model can be created by the optimization of the parametric grid of the blade body surface . some key techniques used in the solution , such as the computation of the data points on the meanline , the technology of cotinuty between the leading line and the outline of the blade body and the technology of the cross - section curve discretization , are disserated , and corresponding algorithm are presented in this paper 在进行参数网格优化的过程中，需要进行中弧线数据点求解、缘头拼接和截面线离散，本文对以上三个问题进行了深入研究，并在此基础上提出了中弧线数据点求解算法，缘头拼接算法和截面线离散算法等研究成果。
