期待...高手...

首先定义数组，ln(4),
然后：ln(1)＝

已经用了，完全实现了功能，现在一个新的问题是拉伸的实体现在需要倒角或者圆角，应该怎么实现，请DX赐教。

Blend/Chamfer

语法
BLEND/obj,{RADIUS|CHAMFR},num[,obj list1][,VERT,obj list2][IFERR,label:]

功能
Allows you to modify a solid by either rounding (blend) or beveling (chamfer) specified edges of the solid.

The BLEND statement works in much the same way as the Blend option in the Modeling application except that you may only do fixed radius blends. See the Modeling Help.

Parameters

obj
The solid to be modified.

RADIUS
Minor word indicating that a blend operation is to be performed on the solid.

CHAMFR
Minor word indicating that a chamfer operation is to be performed on the solid.

num
When used with the RADIUS minor word, num is the positive radius of the blend.

When used with the CHAMFR minor word, num is the offset distance between the intersection of the specified edges. When one edge is curved, the offset is measured along the path of the curved edge.

obj list1
First list of point objects which identify the edges of the solid to blend/chamfer. The points identify the edges by distance. If neither list of points is specified, then the system blends/chamfers every edge in the solid.

VERT
Optional minor word specifies that the following list of points identifies vertices on the solid.

obj list2
Second list of point objects which identify vertices on the solid. The points identify the vertices by distance. The edges involved in these vertices are blended/chamfered. If you do not specify either list of points, then the system blends/chamfers every edge in the solid.

IFERR,label:
Specifies a label to which program execution jumps if an error occurs. Possible errors include: illegal object specified; radius values must be positive, etc.