D.退出草图后,根据题意拉伸参数。开始值为l-r,终止值为l+r.两侧的偏置值为-r和r. E.施加倒圆半径为r. F.求和,对数据分层后,如下图所示. 结论: 通过改变r值可以改变圆台的直径大小. |
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