介绍了一种三角曲面的构建方法，首先以三条边和其中一条边对应的顶角创建三角曲面；接着在顶角收敛处创建投影曲线，并用投影曲线将收敛的部分曲面裁剪掉；然后以四条边界曲线创建曲面，并使曲面和原曲面相切；最后合并两曲面。通过曲面偏距网格分析可知，曲面的U、V方向网格线不再相交于一点，表明曲面品质在收敛角处得到改善。%This paper introduces the construction of triangular curved surface, that a triangular curved surface is created with three sides and corres ponding vertex angle of one side, then a projection curve is set up at the convergence of the vertex angle and partial converged surface is cut out with the projection curve. Then a curved surface is establised with the four boundary curves, which is made tangential to the original one. Final y the two curved surfaces are merged. Through the curved surface offset grid analysis, it is lound that the surface U, V direction grid lines never intersect at one point. This shows that the surface quality gets improved at the converged angle.
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