Strange behavior from polar function in LISP

[Muhammed.OPERA]

Hi everyone 🙂

I'm defining list of points using polar function but a strange response occurred

 when i'm use the lisp and i'm not zooming in the point i choose (i defined the points from), the points isn't accurate , no it's totally wrong but,

when i choose the point when i'm zooming in very much before i choose the point then click to choose it, it's now true.

Is there any relation with polar function and the zooming area i'm standing on.

Thanks

[cadffm]

Where is your code?

Polar houl not depend of view, only the autocad objectselection (and that is not a Lisp thing).

[Muhammed.OPERA]

I have sent it to you @cadffm

[john.uhden · Accepted solution]

I am quite sure that you have a running object snap that's "missing" for you.

For instance if you have used polar to set p1 from p2, that's fine.

But if you use p2 to perform an entsel or nentselp or such, and your current osnap is endpoint, then you are likely going to be picking an endpoint of something in the vicinity of p2, not exactly at p2.  This happens most often when zoomed out because the pickbox and aperture cover more area than when zoomed in tight.

So, either temporarily set osmode to 0 (off) or use "_non" immediately prior to specifying a point.

[cadffm · Accepted solution]

Osmode 0 deselect all snaps from osnap setting and need a error function for reset by cancel

Smarter: Turn osnap off
Osmode + 16384 set osnap off


(defun osnapoff nil (setvar "OSMODE"(logior (getvar "OSMODE") 16384)))
(defun osnapon nil (setvar "OSMODE"(logand (getvar "OSMODE") 16383)))

But for automation specially disable osnap with OSNAPCOORD=1,
no osmode or _non needed.

[Muhammed.OPERA]

Thank you @cadffm @john.uhden