Topic: I can not break my splines at the intersections.

[Thomas 3D]

Hello Forum,

I have sometimes big wireframes, with many intersections. I have look for a lisp routine, which can break all my "lines" in the intersection. The Lisp commands which I have found, not working really.
Sometimes my grid consists of lines, arcs, polylines and splines.
I know, I can use the Autocad command "break", but if I would use this command, then I have to do a long time.

Who can help me with my problem?

Best Regards
Thomas

[Lee Mac]

Do either of these work for you?

http://www.theswamp.org/index.php?topic=38032.0

http://www.theswamp.org/index.php?topic=10370.0

[Thomas 3D]

Hi Lee,

thanks for your quick help.
I tested both lisp routines, but unfortunately without success. The splines can not share in the intersections.
Do you have any idea why it did not work for me?

Thomas

[CAB]

The drawing you uploaded is blank for me in ACAD2006.

[alanjt]

The drawing you uploaded is blank for me in ACAD2006.

No wonder he can't break the splines, they don't exist.

[Thomas 3D]

Hi Alanjt,

why do you say ->the splines don't exist.

I have open again my file, and I can see the spline. Or did you mean something else?

[alanjt]

Hi Alanjt,

why do you say ->the splines don't exist.

I have open again my file, and I can see the spline. Or did you mean something else?

It was a joke based on CAB's response.

[CAB]

Hi Alanjt,

why do you say ->the splines don't exist.

I have open again my file, and I can see the spline. Or did you mean something else?

I could not see the spline opened in ACAD 2006.

[hmspe]

When I try to break or trim the splines I get the message

Object is perpendicular to UCS XY plane.

The intersection osnap shows very few actual intersections.  Most trim routines require that the entity being trimmed has an actual intersection with the trimming line.

[alanjt]

Would changing the project help?

eg.

Code: [Select]

Command: tr TRIM
Current settings: Projection=UCS, Edge=Extend
Select cutting edges ...
Select objects or <select all>: Specify opposite corner: 2 found

Select objects:

Select object to trim or shift-select to extend or
[Fence/Crossing/Project/Edge/eRase/Undo]: p

Enter a projection option [None/Ucs/View] <Ucs>:

[SOFITO_SOFT]

Hello:
If you can use the discretized splines every 10 units ( for example ) , you can calculate interserccion points in a very approximate. And from them, break the entities.
That may solve your problem ?
Greetings.