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Extracting the "Custom scale" value from an existing viewport

landsurveying

By landsurveying
in AutoLISP, Visual LISP & DCL

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landsurveying Newbie

landsurveying

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Posted

Hi!

 

I have a drawning, where there is viewport in paper space.

I want to select the existing viewport and extract the value of "Custom scale" and store it in the variable "cus" for further calculations.

 

I think this should be done with the following lisp commands:

 

(setq cus (assoc <ITEM> (entget (car (entsel)))))

Where "" is representing a number, but I don't know what number I should use, and can't seem to find in the "Entity DXF Group Code Table".

 

Can anyone help?

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