This algorithm has higher efficient than the method which uses tool path envelope intersection with normal vector of surface of geometry model and has higher verification precise than the method that uses tool path envelope intersection with z direction vectors 其运行效率高于用几何模型法向量与刀具扫掠体求交的方法，验证精度大于用z坐标方向矢量与刀具扫掠体求交的算法。
