曲线的光顺？？

函数UF_CURVE_smooth_spline_data中的第2、3、4个参数分别是什么意思（参数是cont_order、distance_toler、angle_toler）？？还望高手指点！！

在ug帮助文档中，其中cont_order意思是：order of continuity to achieve。
                     distance_toler是：tolerance; smoothing is done if the deviation in shape introduced is less than this amout. Zero indicates use NX modelling resolution.
   angle_toler是tolerance; smoothing is done if the angle between tangents at the joint is less than this amount. Zero indicates use NX modelling resolution.
可是不知道意思！！