ssget using entity type & poin

MJLM · 发表于 2022-7-5 23:34:16

I have this expression

(setq myvar (ssget "X" '((0 . "LINE") (10 5 3 2))))

It makes a selection of all lines starting from this point x=5, y=3, z=2.
However when I get the values of 5,3,2 from an other command as variables e.g

(setq a 5 b 3 c 2)

the following gives me error "bad ssget list"

(setq myvar (ssget "X" '((0 . "LINE") (10 a b c))))

Would it be possible to avoid this and have the selection based on xyz points as variables rather than fixed known values?

David Bethel · 发表于 2022-7-6 00:05:17

The quote ' makes an expression literal ( not evaluated )

Try

copy

(setq myvar (ssget "X" (list (cons 0 "LINE")(cons 10 (list a b c)))))

or

copy

(setq myvar (ssget "X" (list (cons 0 "LINE")(list 10 a b c))))

-David

MJLM · 发表于 2022-7-6 00:19:04

Thank you.

Lee Mac · 发表于 2022-7-6 00:34:45

Further to David's excellent suggestion, here is a tutorial explaining why the quote cannot be used when there are expressions to be evaluated: The Apostrophe & Quote Function

[编程交流] ssget using entity type & poin

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