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由基曲面间的交点出发，根据过渡半径约束计算点对应，在所得点对应序列的首尾两端进行跟踪， 由点对应构造截面线， 对截面线进行离散形成型值点， 从而构造符合 Ｇ Ｃ 要求，与基曲面结构相似的过渡曲面。测试显示，上述构造过渡曲面的方法简单可靠，能够满足反求工程 Ｃ Ａ Ｄ 建模的要求。
Starting from the point of intersection between the base curves, the corresponding points are calculated according to the transition radius constraint. The end points and tail ends of the corresponding points of the obtained points are tracked. The section lines are constructed from the points and the discrete points are formed to the section lines. Requirements, transition surface similar to the structure of the base surface. The test shows that the above method of constructing the transition surface is simple and reliable and can meet the requirements of CAD modeling of reverse engineering.