A direct interpolation algorithm for spatial curves on a surface is proposed for pen-cutting of sculptured surfaces. 摘要针对复杂曲面笔式加工时位于曲面上的空间曲线型刀具轨迹，给出一种直接插补算法。
Although, in the last two decades, great progress has been made in the study of triangulated surface flattening, flattening a high complex surface remains an open pr. 尽管近二十年来对三角化曲面展开的研究取得了很大的进展，但复杂曲面展开技术仍有很大的研究与应用空间。
