topic Re: Extend trim lines, Arcs Autolisp in AutoCAD Forum

Extend trim lines, Arcs Autolisp

Peter_MElad — Fri, 02 Jun 2023 16:55:48 GMT

Auto Extend trim lines, Arcs lisp for each layer and separate trim/extend/trim for each layer

@paullimapa @Sea-Haven @john.uhden

Re: Extend trim lines, Arcs Autolisp

Kent1Cooper — Fri, 02 Jun 2023 17:40:26 GMT

EDITED:

In the 2nd & 4th situations, this will do that:

PEDIT

Multiple option

[select stuff]

Join option

big-enough fuzz distance to catch the nearby stuff

[another Enter to conclude]

[If the PEDITACCEPT System Variable is set to 0, and the things in your image are Lines, you will be asked whether to convert them to Polylines for joining -- answer Yes.]

For the 1st [left-most] situation, what is the criterion by which a routine would be able to determine that the horizontal connector should meet the top of the right line, and the left line should extend down to that level, rather than having it meet the bottom of the left line, with the right line extending up to that level, or something in between?

Closing the gap in the 3rd situation is another question. Is that a Polyline, or 5 Lines?

Re: Extend trim lines, Arcs Autolisp

john.uhden — Fri, 02 Jun 2023 19:28:43 GMT

@Peter_MElad ,

I think we can all deduce what your goal is, but I am wondering about the leftmost figure. How would a program decide whether to extend the right vertical line up to the bottom of the left line or to extend the left vertical line down to the top of the right line.

Seems to me you need only 3 stock AutoCAD commands... ERASE, LINE, and FILLET for all 4 figures.

Please demonstrate what you can do with arcs, or perhaps a combination of lines and arcs.

Like the three-toed sloth playing pictionary, how would you finish off one vertical line?

Re: Extend trim lines, Arcs Autolisp

Peter_MElad — Sat, 10 Jun 2023 15:52:12 GMT

I think by getting the free points or lines and get the nearest to the other and joining it by lines after add lines join it and final trim

Re: Extend trim lines, Arcs Autolisp

Peter_MElad — Wed, 14 Jun 2023 15:50:50 GMT

I don't have the ability to make Lisp.

Re: Extend trim lines, Arcs Autolisp

Kent1Cooper — Wed, 14 Jun 2023 16:04:08 GMT

@Peter_MElad wrote:

I don't have the ability to make Lisp.

But I expect you have the ability to answer questions that have been asked....

Re: Extend trim lines, Arcs Autolisp

Peter_MElad — Wed, 14 Jun 2023 16:45:51 GMT

I am very sorry really, I don't see the question ...... the left shape only parallel connect as you made to achieve (be as far as possible from the lines) ........ if not parallel connect with two points only. and finally close polyline (close Area)

Re: Extend trim lines, Arcs Autolisp

Peter_MElad — Wed, 14 Jun 2023 16:27:08 GMT

I am very sorry ...... the left shape only parallel connect as you made to achieve (be as far as possible from the lines) ........ if not parallel connect with two points only. and finally close polyline (close Area)

Re: Extend trim lines, Arcs Autolisp

Kent1Cooper — Wed, 14 Jun 2023 16:56:08 GMT

From the other topic we know that when there are different possible results, you're looking for the result with the larger area, but this partial image from Message 1 has nothing on which to base an area comparison:

So will it always be in relation to more of an outline, and never like this?

Re: Extend trim lines, Arcs Autolisp

Peter_MElad — Wed, 14 Jun 2023 17:16:51 GMT

I draw area but the lines with gray not only two lines