UG二次开发，样条曲线的绘制 源码以绘制一条凸轮廓线为例-UG secondary development, spline curve drawing source to draw an example of a cam profile

UG二次开发实例；在NX8.0中的工具条，可以实现对零件密度、体积、质量的快速计算，方便模具设计的校验。-UG secondary development instance In NX8.0 toolbar, can be achieved on the quality of parts, volume density, fast calculation, convenient check mold design.