topic Re: Linetype generation for polylines in AutoCAD Forum

Linetype generation for polylines

lovecraft — Wed, 07 Sep 2022 15:29:18 GMT

Here's an odd little phenomenon that I find hard to understand. With the variable PLINEGEN set to "1" (enabled), if I generate an ordinary polyline (any random shape comprised of pline segments) its linetype generation property is listed as "enabled". But, after drawing a rectangle (a form of polyline, after all), its linetype generation property is listed as "disabled". Anyone care to comment? Whassup with this?

Thanks in advance, LC

Re: Linetype generation for polylines

TheCADnoob — Wed, 07 Sep 2022 15:55:21 GMT

I imagine its a feature of how the command works. If you need it to be enabled you can change your rectangle command in the cui to change the property after the rectangle after its created.

^C^C_rectang;\\.pedit;L;L;on;;

Re: Linetype generation for polylines

TomBeauford — Wed, 07 Sep 2022 15:55:27 GMT

The RECTANG (Command) doesn't change the value of PLINEGEN but does set the rectangle polyline linetype generation to disabled automatically. I assume to make it look better.

Re: Linetype generation for polylines

pendean — Wed, 07 Sep 2022 15:56:39 GMT

RECTANG command is not PLINE command. But POLYGON command works the way you want.
As do any LISP that use PLINE command to draw rectangles.

Odd, huh. Welcome to AutoCAD 😉

Re: Linetype generation for polylines

Kent1Cooper — Wed, 07 Sep 2022 16:02:06 GMT

It's a "feature" [flaw?] of the RECTANG command specifically, which also has another similar "feature" -- it does not honor the PLINEWID setting, either. If you have a non-zero width set for Polylines, RECTANG ignores it and draws them with zero width.

Re: Linetype generation for polylines

Kent1Cooper — Wed, 07 Sep 2022 16:14:43 GMT

@pendean wrote:
RECTANG command is not PLINE command. .... Odd, huh. Welcome to AutoCAD

Yes, it is odd, and unexpected for two reasons. The first is the OP's issue, that what it draws is a Polyline, so one might expect the result to be a Polyline in the same vein as one drawn by other means. The second reason is that other commands that are also not PLINE, but that result in Polylines, do honor the PLINEGEN setting [POLYGON as you mentioned, REVCLOUD, DONUT, and SKETCH when the Type option is Polyline].

Re: Linetype generation for polylines

lovecraft — Thu, 08 Sep 2022 14:43:31 GMT

Thanks, Kent, for your input. Your overall knowledge is mighty impressive.

Re: Linetype generation for polylines

lovecraft — Thu, 08 Sep 2022 14:44:17 GMT

Thanks again, Dean. Like Kent Cooper, your knowledge of all things ACAD is impressive.

Re: Linetype generation for polylines

lovecraft — Thu, 08 Sep 2022 14:45:16 GMT

Thanks, CADnoob, for your input. Lots of useful info from all of you follow-up posters.

Re: Linetype generation for polylines

lovecraft — Thu, 08 Sep 2022 14:46:45 GMT

Thanks for joining in this discussion. You and the other follow-up posters have given me food for thought.