topic Re: Getting area in Visual LISP, AutoLISP and General Customization Forum

Getting area

Muhammed.OPERA — Thu, 14 Dec 2017 01:13:06 GMT

Hi everyone 🙂

I'm trying to get area of a polyline to store it's value to get it in some equations in lisp.

Is there any code can get area of polyline

I think that's Entget

I don't know is it or not and i don't know how to use it.

I hope you can help me with that.

Thanks for all

Re: Getting area

john.uhden — Thu, 14 Dec 2017 02:50:38 GMT

If you convert an ename of a polyiline into a vla-object, you can...

(setq area (vlax-get object 'area))

or if E is the entity name, then in longer terms...

(setq area (vlax-get (vlax-ename->vla-object E) 'Area))

Re: Getting area

Muhammed.OPERA — Thu, 14 Dec 2017 03:20:20 GMT

I have tried it . it's working

Thank you for your time

Re: Getting area

_Tharwat — Thu, 14 Dec 2017 09:19:31 GMT

Hi,

With the use of vlax-curve-* functions you can get the length of any object that have a length property and without converting the target object to vla-object as follows.

(setq e (car (entsel "\nSelect polyline :")))
(vlax-curve-getdistatparam e (vlax-curve-getendparam e))