lisp如何实现先选中图元再输入命令进行操作

ld_117

如题，就像cad自带的Move命令一样，先选中图元再输入Move命令，然后就可以直接移动了。
求思路。

Andyhon

ssgetfirst Function

Determines which objects are selected and gripped

(ssgetfirst)

Returns a list of two selection sets similar to those passed to sssetfirst. The first element in the list is a selection set of entities that are gripped but not selected. The second element is a selection set of entities that are both gripped and selected. Either (or both) elements of the list can be nil.

Note  Only entities from the current drawing's model space and paper space, not nongraphical objects or entities in other block definitions, can be analyzed by this function.

See Also

The ssget and sssetfirst functions.

vectra

ssget 放在defun里面第一句，先取得选择集再执行其它操作

ld_117

Andyhon 发表于 2015-4-14 13:34
ssgetfirst Function

Determines which objects are selected and gripped

了解啦，(ssgetfirst) 判断一下就ok啦！