topic Re: Creating a cut automatically in AutoCAD Forum

Creating a cut automatically

patriciotxk — Sat, 12 Sep 2020 15:44:43 GMT

Is there anyway to create a cut automatically having a drawing with elevations? I am going to upload the drawing that I have.

Re: Creating a cut automatically

devitg — Sat, 12 Sep 2020 16:50:07 GMT

@patriciotxk , to cut , what ? .

do you mean to get a section from the polylines at CV layer ??

or for 3dpolylines

at layer "CURVASN-VEL-2"

If so , how to cut. ?

Re: Creating a cut automatically

patriciotxk — Sat, 12 Sep 2020 16:56:14 GMT

I am doing a cut using the polylines with elevation that are in the Cv layer, so I want one method that allows me to create a cut with that information, but I also would like a method to draw automatically a cut with lines that are 3d polylines... What I want is to draw the profile of the soil the best way possible...

Best regards.

Re: Creating a cut automatically

devitg — Sat, 12 Sep 2020 17:06:43 GMT

@patriciotxk please make cut-lines at both dwg attached

Re: Creating a cut automatically

patriciotxk — Sat, 12 Sep 2020 17:16:27 GMT

Do you want me to just cut the lines in the direction that I want the cut to appear. I dont know if you can understand me.

Re: Creating a cut automatically

devitg — Sat, 12 Sep 2020 17:19:24 GMT

@patriciotxk I understand you.

just cut the lines in the direction that I want the cut to appear

of course

Re: Creating a cut automatically

patriciotxk — Sat, 12 Sep 2020 17:27:14 GMT

Here you have. I think this is what you looking for.

Re: Creating a cut automatically

dgorsman — Sat, 12 Sep 2020 17:30:28 GMT

@patriciotxk wrote:

Do you want me to just cut the lines in the direction that I want the cut to appear. I dont know if you can understand me.

You are using a number of terms which can be interpreted generically as well as specifically, but with different meanings across multiple disciplines. We don't really know where you're coming from on this, so it's best if you break down the problem into simple steps that you would normally follow to solve it manually, without any expectation of previous knowledge on the part of forum readers. This also has benefits for yourself, as doing this frequently results in an "Aha!" moment where you realize the solution yourself. Look up "Rubber duck debugging" for the general concept.

Re: Creating a cut automatically

ChicagoLooper — Sat, 12 Sep 2020 17:56:45 GMT

Do you run Civil 3D? Or are you using plain vanilla AutoCAD?

Re: Creating a cut automatically

hak_vz — Sat, 12 Sep 2020 18:50:03 GMT

If you know how to use autolisp here is my code to create terrain sections.

Re: Creating a cut automatically

ChicagoLooper — Sat, 12 Sep 2020 19:24:40 GMT

ESTÁ BEM. Assim vejo a sua citação em Alverca do Ribatejo.

It looks like a Civil3D drawing that was Saved as AutoCAD. The 'technology' as been taken out and the drawing has been reduced from C3D to Plain Vanilla AutoCAD. It appears the civil entities, which were probably present in an earlier version, are no longer there. Fortunately, there's enough elevation data remaining so your surface can recreated and your cutlines, labeled as 1-1, 2-2 and 3-3, can be used to create new alignments.

When you combine your new Surface with the newly created Alignments, then functions in Civil3D can create the profiles you want and do it automatically-ish. Without AutoCAD Civil3D, then there's no 'automatic' way to do it. Vanilla AutoCAD simply lacks the horsepower to perform at the engineering level needed to draw profiles 'automatically.'

Re: Creating a cut automatically

hak_vz — Sat, 12 Sep 2020 19:33:53 GMT

@ChicagoLooperIf he don't use Civil 3d he can create sections in pure vanilla Acad using autolisp code. There are many solutions available free over the internet that create sections. Maybe they are not so sophisticated as Civil 3d but are more than useful. In previous post I've posted link to my solution in autolisp.

Re: Creating a cut automatically

ChicagoLooper — Sat, 12 Sep 2020 20:02:10 GMT

I wouldn't use code to trim a line or use code to create a viewport on a layout tab. I would use the built in native functions. Yes, i agree, using code to show off you coding skill can be done when drawing profiles, but the client or readers of the drawing, e.g. the excavator, the civil infrastructure installers, or the Department of Works Vehicles and Municipal Services are really not interested in your lisp coding skills. They are interested in the work to be done so the job can be approved, stamped, and performed right the first time with no change orders and no overtime, which invariably, saves time and money.

Re: Creating a cut automatically

hak_vz — Sat, 12 Sep 2020 20:40:58 GMT

@ChicagoLooper wrote:
I wouldn't use code to trim a line or use code to create a viewport on a layout tab. I would use the built in native functions. Yes, i agree, using code to show off you coding skill can be done when drawing profiles, but the client or readers of the drawing, e.g. the excavator, the civil infrastructure installers, or the Department of Works Vehicles and Municipal Services are really not interested in your lisp coding skills. They are interested in the work to be done so the job can be approved, stamped, and performed right the first time with no change orders and no overtime, which invariably, saves time and money.

I'm to old to show off.

My clients don't complain when I use it creating project documentation and for me all what you say matters. No one says he or anyone have to use it.

Re: Creating a cut automatically

ChicagoLooper — Sat, 12 Sep 2020 21:25:12 GMT

Is your code able to change vertical exaggeration? Can it project objects from plan view such as building footprints, retention ponds, manhole covers? Is it capable of modifying the beginning and ending stations along the horizontal axis? Are you able to change the intervals of the tick marks along the vertical and horizontal axes? Will a change in the 'cutline' be reflected in the profile, and if so, is the change immediate? Is it capable of analyzing a proposed profile that's superimposed on top of an existing profile? Can it display slope or grade labels along the profile?

Do you need the above mentioned features? Do your clients need them? Have you ever asked them? Would they want them if you made them available? Would your clients find it beneficial to supply these types of profiles to their subcontractors? If your clients want or need them and you cannot provide them, then you are shortchanging them.

Re: Creating a cut automatically

hak_vz — Sat, 12 Sep 2020 23:11:05 GMT

@ChicagoLooper Whole program package do most of the stuff that you mention, those two functions I have posted here definitively do not.

Re: Creating a cut automatically

patriciotxk — Mon, 14 Sep 2020 15:19:08 GMT

I never used autolisp. Can you help me?

Best regards

Re: Creating a cut automatically

patriciotxk — Mon, 14 Sep 2020 15:20:21 GMT

Is it difficult to learn autocad 3d? is there any free version available?

best regards.

Re: Creating a cut automatically

ChicagoLooper — Mon, 14 Sep 2020 15:58:10 GMT

You are correct. Civil3D is not an easy program to learn. There are many users within the engineering field who feel it is worth the effort. The benefits of using C3D when creating profiles, as well as other engineering-type drawings, comes at a price and that price is the time you must put into learning it.

If you are a student, you may download a free Student Version, subject to Autodesk's student verification. While Autodesk promotes the educational use of their programs, it does not permit any Student Version to be used when drawing for commercial purposes. (A violation may, or may not, result in a loss of license.)

Warning, all student versions of AutoCAD will generate a 'Student Version' watermark on all hardcopies and any digital printed output. The watermark is hardcoded in the dwg and once the drawing is saved in a student version, you cannot get rid of it. Even if you subsequently open the dwg in a non-student version, the watermark will remain.

If you want C3D and believe you can benefit from some of its functions but don't have the program, then you are are probably handicapping your firm. Tell you boss to buy it along with a training course(s) so you and your firm can remain competitive in the industry.

Re: Creating a cut automatically

patriciotxk — Mon, 14 Sep 2020 16:01:09 GMT

Ho do I use your code? it doesn´t seem that what you have sent was a lisp, but rather the code that is inside the lisp.

Best regards.