本示例段演示了从点云创建曲面的操作，然后从曲面上抽取一条等参数线作为加工曲面时的切触点轨迹线，把该切触点轨迹线离散得到单个的切触点。对于曲面上的每个切触点，访问曲面在该点处的信息并采用球头刀加工时刀尖点的位置并从该点画出刀轴所在的直线。在此程序段中，刀轴矢量默认为与z轴平行,对应书中5.8.3中的示例程序。

运行要求: （路径上不能有中文）1、打开UG NX3.0或以上版本，新建一个.prt文件

2、使用快捷键"Ctrl+U"，出现选择对话框，选择程序所在的位置。

使用"Fit"功能将生成的图形缩放到合适的窗口中查看。-The example below demonstrates the point cloud created from the surface of the operation, and then extracted from the surface as a line of processing parameters such as surface contact when the cut trajectory, the trajectory of the cut line of contact to get a single cut of discrete contacts. For each cut on the contact surface, the surface at that point to access the information and use ball-end cutters processing location of the point tip and draw the knife from the point where the straight line axis. In this block, the default tool axis vector parallel with the z-axis, corresponding to the book' s sample programs 5.8.3. Operation: (path can not have Chinese)