Topic: Filter command - Closed Polyline Option?

[quamper]

In quick select you can check for Closed/Non-Closed polylines. Can you check for that with the Filter Command/Dialog?

[rkmcswain]

I don't think so.

You can do it with lisp like this:

Code: [Select]

;;; select closed polylines
(ssget '((0 . "POLYLINE,LWPOLYLINE")(-4 . "&")(70 . 1)))


[quamper]

Is there not a DXF code for Open Polylines? I just looked in the DXF reference and I don't see anything, but I might be missing something obvious.

[CAB]

DXF 70

Polyline flag (bit-coded); default is 0:
1 = Closed; 128 = Plinegen

[quamper]

Hmm  .. ok I'm still not getting it for some reason.

I draw 2 new polylines in an empty drawing. 1 of which is closed and the other is not.

Code: [Select]

(ssget "x" '((0 . "LWPOLYLINE")))
That selects both polylines in the drawing no problem what so ever.

however nothing else (including samples already posted) I've tried will select just one or the other. Everything will either select both or nothing

[Spike Wilbury]

Did you tried with:


;; close
(ssget '((0 . "POLYLINE,LWPOLYLINE")(-4 . "=")(70 . 1)))

;; open
(ssget '((0 . "POLYLINE,LWPOLYLINE")(-4 . "=")(70 . 0)))

[quamper]

Did you tried with:


;; close
(ssget '((0 . "POLYLINE,LWPOLYLINE")(-4 . "=")(70 . 1)))

;; open
(ssget '((0 . "POLYLINE,LWPOLYLINE")(-4 . "=")(70 . 0)))

ARG! That's what I was trying  , but I had overlooked the fact that .. somehow the closed one changed to an open one, hence it not working right.

Sorry. That's exactly what I was looking for. Thanks for being patient 

[Jeff_M]

That will not work when PLINEGEN is True.....you must test for the Bitwise 1 (as R.K. suggested):

Code: [Select]

;;get all lwplines
(setq ss (ssget "x" '((0 . "LWPOLYLINE"))))
;;get only closed lwplines
(setq ssclosed (ssget "x" '((0 . "LWPOLYLINE")(-4 . "&")(70 . 1))))
;; get only open lwplines
(setq ssopen (ssget "x" '((0 . "LWPOLYLINE")(-4 . "<NOT")(-4 . "&")(70 . 1)(-4 . "NOT>"))))


[rkmcswain]

    (ssget "x" '((0 . "LWPOLYLINE")))
That selects both polylines in the drawing no problem what so ever.
however nothing else (including samples already posted) I've tried will select just one or the other. Everything will either select both or nothing

You must have missed this one   

[quamper]

    (ssget "x" '((0 . "LWPOLYLINE")))
That selects both polylines in the drawing no problem what so ever.
however nothing else (including samples already posted) I've tried will select just one or the other. Everything will either select both or nothing

You must have missed this one   

Well I was having problems with that for the same reason.

While the following that you posted works for closed polylines

Code: [Select]

(ssget '((0 . "POLYLINE,LWPOLYLINE")(-4 . "&")(70 . 1)))
changing the 70 . 1 to 70 . 0 doesn't work for open polylines.

But really that would have gotten me on the right track if I hadn't screwed up my sample I was working with