对于半球我们需要加,一个平的底面之类的边界。
To watch the sun from the northern hemisphere, you have to face south.从北半球看太阳,你必须面向南方。
If you will accomplish a part machining of hemisphere surface and ball platform face of the radius needing by using it, you only need evaluate correlative variable in the main program.使用时只需在主程序中对相关变量进行赋值即可完成所需半径的半球面及球台面的零件加工。