SSGET with additional filter?

[Anonymous]

Hi,

I try to pick object that have closed boundary with ssget

(ssget '((0 . "*POLYLINE")))

 But it doesn't include circle or other closed boundary objects? 

How can I select all closed boundary objects in a drawing with ssget or add some object type filter in ssget?

So it maybe seem like this

(ssget '((0 . "*POLYLINE") (0. "CIRCLE")))

Many thanks.

[hmsilva · Accepted solution]

Hi maikhanhmst,

untested, I don't have AutoCAD in this laptop...

(ssget '((-4 . "<OR")
         (-4 . "<AND")(0 . "*POLYLINE,SPLINE")(-4 . "&=")(70 . 1) (-4 . "AND>")
         (-4 . "<AND")(0 . "ELLIPSE")(41 . 0.0)(-4 . "AND>")
         (-4 . "<AND")(0 . "CIRCLE,REGION")(-4 . "AND>")
         (-4 . "OR>")
        )
)

Hope this helps,
Henrique

[stevor]

As long as you are at it,

might as well see it all at:

http://www.lee-mac.com/ssget.html

Your statement could be:

 (setq ss (ssget "x"'((-4 . "<OR")  
  (-4 . "<AND") (0 . "*POLYLINE") (70 . 1) (-4 . "AND>")   
  (0 . "CIRCLE")  (-4 . "OR>")) ))
 (princ" \n Closed: ") (prin1 (sslength ss))

 (setq ss (ssget "x"'((-4 . "<OR") (0 . "*POLYLINE") (0 . "CIRCLE")(-4 . "OR>"))))
 (princ" \n Any: ") (prin1 (sslength ss))

[Anonymous]

Hi everybody,

Thank you for your replies.

The code picked some of closed boundary objects in my drawing, not all of them.

I also attached the drawing. 

[dbroad]

Are you sure that the ones not selected are closed?  Every one I tested that was not selected was not closed but looked closed.

If you want to select both closed and those that look closed, perhaps this would work.

(setq ss(ssget '((-4 . "<OR")
         (-4 . "<AND")(0 . "LWPOLYLINE,SPLINE")(-4 . "&")(70 . 1) (-4 . "AND>")
	 (-4 . "<AND")(0 . "POLYLINE")(-4 . "<NOT") (-4 . "&")(70 . 112)(-4 . "NOT>") (-4 . "AND>")
         (-4 . "<AND")(0 . "ELLIPSE")(41 . 0.0)(-4 . "AND>")
         (-4 . "<AND")(0 . "CIRCLE,REGION")(-4 . "AND>")
         (-4 . "OR>")
        )
))

[hmsilva]

---

maikhanhmst wrote:

The code picked some of closed boundary objects in my drawing, not all of them.

I also attached the drawing. 

---

Hi maikhanhmst,

the not selected boundaries, are not closed...

Henrique

[pbejse]

---

@hmsilva wrote:

...the not selected boundaries, are not closed... 

Henrique

---

Thats always been most of the time 

Perhpas Autodesk needs to resolve that issue by automatically flagging the polylines as closed when the start and endpoint is the same, or a system variable for such cases with fuzz value 

[hmsilva]

---

@pbejse wrote:

---

@hmsilva wrote:

...the not selected boundaries, are not closed... 

Henrique

---

Thats always been most of the time 

Perhpas Autodesk needs to resolve that issue by automatically flagging the polylines as closed when the start and endpoint is the same, or a system variable for such cases with fuzz value 

---

Yes pBe, that's true!

I also agree that polylines should be flagged automatically as closed when the start and endpoint is the same.

Cheers

Henrique

[stevor]

The case where a LWPOLYLINE, POLYLINE, ARC, or anything that looks 'closed' but is in fact only with its end vertices in close proximity, can be tested by the 'vlax-curve-getStartParam, and 'vlax-curve-getEndParam, and so on. Probably worth doing in all cases of less than perfect DWGs.

[hmsilva]

---

@stevor wrote:

The case where a LWPOLYLINE, POLYLINE, ARC, or anything that looks 'closed' but is in fact only with its end vertices in close proximity, can be tested by the 'vlax-curve-getStartParam, and 'vlax-curve-getEndParam, and so on. Probably worth doing in all cases of less than perfect DWGs.

---

Hi stevor,

probably you meant vlax-curve-getStartPoint and vlax-curve-getEndPoint

My understanding is that there should be easier to the user to identify a non closed *polyline/spline, possibly with some rollover icon and right click to close the object...

Some users, do not know that an object with coincident startpoint/endpoint is not by default a closed object.

Henrique

[Kent1Cooper]

If you have Polylines that are not closed [whether they appear to be or not], but that you want closed, try PLsCloseCorner.lsp, available here.  There's a single-selection version, PLCloseCorner.lsp, at Post 14 on the same thread, but I assume you'd rather have the one that will do it to all open Polylines in the drawing [or in the User's selection, if the noted modification is made].  There are other approaches on that same thread, and considerable discussion about the difference between Polylines that are closed and those that look closed but are not.

[Anonymous]

Hi everybody,
Many thanks.
My problem was solved.
I also realized the different is 2D polyline (not a closed object) and polyline (a closed object).
Thank you 🙂

[Kent1Cooper]

---

@Anonymous wrote:
.....
I also realized the different is 2D polyline (not a closed object) and polyline (a closed object).
....

---

Not always.  2D Polylines can be open or closed, and Lightweight Polylines can be open or closed, and 3D Polylines can be open or closed, and any variety of Polyline can look like it's closed but not really be closed, having its starting and ending points in the same place.  [Splines and Multilines also have the same possibilities.]

[Anonymous]

Thank you 😄