Open Polylines ......

Just wondering if it`s possible ........

I have a dwg in which are over 5 000 polylines representing terrain
contours.
I want to export them to other app`s (maxx) and model a terrain, but it only
works with CLOSED polylines.
So if I select all entities in the dwg Object Properties Toolbar reports the
polylines, either open or closed.
The /open/closed tab is blank because both are selected.

((Open polylines are to be edited until I can close them.))

Is there a way (lisp or something) ACAD (2000) could filter out either of
them, open or closed one`s ?
I could change the open or closed one to a freezed layer and see how many
are to be edited ....

 

Some lines LISP should do it. Create a selection set of all polylines /
lwpolylines. The dxfcode 70 says if the polyline is open (0) or closed (1).
If you need further help let me know.

Juergen

 

How is it done ?
I mean how can I - if all selected - remove either of the open or closed
from selection; so only one type remains in selection ???

 

Try this lisp:

(defun c:scp () ;select_closed_polylines
(setq ssc (ssget "X" '((-4 . "<AND")
(-4 . "<OR")
(0 . "POLYLINE")
(0 . "LWPOLYLINE")
(-4 . "OR>")
(70 . 1)
(-4 . "AND>")
)
)
)
)

(defun c:sop () ; select_open_polylines
(setq sso (ssget "X" '((-4 . "<AND")
(-4 . "<OR")
(0 . "POLYLINE")
(0 . "LWPOLYLINE")
(-4 . "OR>")
(70 . 0)
(-4 . "AND>")
)
)
)
)

The command SCP stores all closed polylines in the variable SSC, the command
SOP stores all open polylines in the variable SSO. In the command line you
have access to these selection sets typing !SSO or !SSC (don't forget the
leading "!").


HTH
Juergen

 

I`ll try it !

Thx ...

 

So I`ve tried it but it didn`t work for me ....
Or there is something about that lisp I don`t know how to use it.
The "!" commands report "nil" ....

 

Assuming you have some opened (lw)polylines, some closed (lw)polylines and
any other objects in your drawing. Copy and paste the code I gave you in a
file with the example name "select-poly.lsp" and store this file in the
support path.
Now load the lisp:
Command: (load "select-poly.lsp") <ENTER>
If you see now at the command line
Command: C:SOP
the file was loaded successfully.

Now you can start the command SOP (if you want to select the open polylines)
or SCP (if you want to select the closed polylines) or both commands:
Command: sop <ENTER>
<Selection set: a>

Command:
Command: scp <ENTER>
<Selection set: c>

If closed or opened polylines were found (all other objects are ignored),
you will get an output <Selection set: nnn> in the command line (nnn is the
internal number of the selection set). If no polylines are found, you wll
get nil.

Command: scp
nil

What you can do with this selectioin sets?
Assuming you want to delete it:

Command: Erase <ENTER>
Select objects: !SSO (for all opened polylines)
Select objects: <ENTER>
Command.

All opened polylines are removed. Doe the same with the closed polylines
with any other edit command.

HTH
Juergen

 

Jurgen,

DeviL (and you) are very generously crossposting...

 

Sorry, I didn't have a look at the header(s).

Excuse me
Juergen

 

It's easy to get caught ; )

 

Now I`m not sure I can follow your conversation ... ????

What about the header ?

Are you Michael saying Juergen didn`t understand - or ?

 

You sent your original post to a large number of newsgroups at once.
("cross-posting")
When he replied, he did the same because he didn't notice.

 

It was only to 3 NG`s!

All right : today I`ve learned the meaning of word "cross-posting".

Thx

 

You're right. The names are so long that it looked much worse than that!

 

Unless I misunderstand, you don't need lisp. With all your plines selected, just start Quick Select, Apply to Current selection, Properties = Closed, Include in new selection set