CAD tip # 12310:

Question

CAD

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How to check if a dimension is associative or not? (LISP)

Using the following LISP function you can verify whether the given dimension entity is associative or disassociated. The function returns nil or the number of the associative point.

; returns nil or assoc point number (1, 2, 3=both)
(defun isDimAssoc? (diment / elst dict)
 (and
  (setq elst (entget diment))
  (setq dict (cdr (assoc 360 elst)))
  (setq elst (entget dict))
  (setq elst (entget (cdr (assoc 360 elst))))
 )
 (cdr (assoc 90 elst))
)

Use this function e.g. this way:

(isdimassoc? (car (entsel "\nPick the dimension to check associativity: ")))

ACAD

*CAD

10.7.2019 8453×

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this tip shared by ARKANCE experts applies to: AutoCAD ·

See also:
Tip 14615:	How to create negative dimensions in AutoCAD?
Tip 13552:	Differential dimension X,Y
Tip 13426:	Use of alternative units for arithmetic in dimensions (without square brackets).
Tip 11989:	How to dimension an ellipse in AutoCAD?
Tip 11823:	Associative dimensions in drawing views of a 3D model in AutoCAD.

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