Topic: Operation with self-intersecting polylines

[sauron-83]

Hi, I've just wonder if there is any method to deal with situation as on the picture below.


Does anyone could help with it.
I found similar topics on this or other forums but not exact what I want to.

I need extract all closed areas from self-intersected polylines.
But this is not only one problem.
I have a huge set of closed polylines and firstly need do determine which one is self-intersecting
then split it into separate closed polilines.
To shed light on I also attached a drawing with data I have.

Thanks in advance for any help.

sauron

[ronjonp]

Not a complete answer, but here is your drawing with the intersecting items colored red.

[sauron-83]

Not a complete answer, but here is your drawing with the intersecting items colored red.

Really great thanks it helps. It's really good result.
I have tested a few lisp functions founded on forums that should verify this
and never get all these (proper result) as on drawing from you.

Could I ask you to share function or method you got this? 
That's is only one of the drawings I have now but expect that will get much more.

sauron

[sauron-83]

Aha, OK
I think know what you did.
Just create regions from all and if won't created it - means it is wrong.
Good idea .


sauron

[Lee Mac]

You could use something like this.

[sauron-83]

You could use something like this.

oh that is I was looking for.
As always just perfect!

Lee,
I had a lot of problems with CAD that already solved mostly by you and
I even didn't have to create a new topics, only found right one.
This time I missed it.

Great thanks for both of you for quick and right answers.
My problem is solved - topic could be closed.

Regards,
Sauron

[Lee Mac]

You're most welcome - I'm glad I could be of some assistance 

[mailmaverick]

My question is for Lee : How are you able to Locate Old Posts so easily ? Kindly let us know how you keep track of old posts so that we may also learn to find them easily.