Expert: Scott Cook - 7/8/2010

Question
Good morning,
I want to draw a number of lines using the
(command "line" pt1 pt2 "")
(command "line" pt3 pt4 "")
etc.
The lines would not necessary be connected.
I then want to copy, or mirror the complete set on lines within the program.  I have tried the append (list)command without success.  Any help will be appreciated.

Rich

Answer
As you draw each line, you need to store the entity you just drew. Then, you can provide that selection to any commands that have a select objects prompt. Read up on selection sets, but the functions you will use are generally entlast, ssadd, and ssget. To give you a general idea, after you draw a line, do something like this:
;draw the first line
(setq en (entlast))
; draw another line
(setq en2 (entlast))
(command "mirror" en en2 "" mirpt1 mirpt2) ; and so on

If you are going to be doing a lot of them, you can put them into a selection set with ssadd.