Hello, everyone!

I decided to step out of my comfort zone and put autoLisp aside for a while. This is my first code in C# for AutoCAD.

The goal of this code is to initially create a representation of a flexible tube. I would really like to link the block I'm creating with the polyline and, depending on the event, recreate the block while maintaining its initial creation characteristics.

Unfortunately, after many attempts, I couldn't store the block information within the polyline. In the commented sections of the code, I can create a dictionary and assign it to the polyline, but after the modification (stretch), the dictionary disappears, and I can't access it to obtain the ObjectId of the block and then perform the deletion.

Since I don't have previous experience with the API, I imagine my code is not very good, and I'm also not following any best practices in AutoCAD .NET development, which results in duplicated code and other oddities. In the future, I will strive to produce something better, but for now, I'm just trying to learn and make it work.

I would greatly appreciate it if you could assist me with object linking and perhaps provide tips on best practices in AutoCAD .NET development.

I'm using autoCAD 2020 and visual studio 2019.

I've been looking at some code on the through-the-interface page. This would be the best scenario, where the links are maintained and loaded when loading the drawing, but I think I'm not ready to implement something of such complexity yet.

https://through-the-interface.typepad.com/through_the_interface/2006/11/linking_circles_1.html

I haven't worked with the collisions and other things that must be done yet, so the code produces bad results on very steep curves. I intend to put the minimum bend radius based on the diameter and material properties.

The project is attached, as well as the dwg file in 2010 format.

Thanks in advance for any help.

Best regards, Luís Augusto.

I can't say that your *.gif explains all that I suppose was thinking (gif is cut out, so complete viewing area is not presented)... I remember that when A2018 new features came, one of the first things was selecting on double monitors, or single one where you start selecting in one portion, then pan and continue, first viewing is off screen and you still in selection mode... When finished, it was gripped/highlighted all when zoomed out... I suppose the same thing is with stretching, just never tested, so that I could state - bug... Bug was with vla-add3dmesh - @Dominicomaria presented when attempted to create BOX... Bug is when I tested (vlax-curve-getpointatdist) providing distance greater then complete length of curve - ACAD throwed start point instead of nil... Bug is when you set QAFLAGS sys/env variable to 1 and ACAD start to behave strange with commands LAYER,..., so I always say reset it as soon as possible to 0... There is also ACAD 2015 VVC error, when using command functions inside (mapcar '(lambda ( x ) ...) lst), or using command instead command-s in error handler... And also memory problems when ACAD crashes - without any reason, or with something not explainable...

Hey ribarm, thanks for your answer.

Who says I'm not going to extrude the 2D entities into solids and therefore working in conceptual.

Depends on how it is solved, if its by changing the visual style or zooming to the object before stretching, probably yes.
But this seems like a bug or hopefully a setting and it would be great if there is a less clunky way of solving it.

I'm using AutoCAD 2015, so it seems like it was sort of introduced before that only when using the 2D Wireframe Visual Style...

Does turning on the level of detail help?

First, off topic :
Why do you have to use "Conceptual" Visual Style when working with 2D entities?
Second :
You have above 100 posts - I suppose you are capable to write such small routine that can overcome this issue...

FYI : Stretching and performing operations out of viewing area was introduced with AutoCAD 2018, so still, if and only if you wrote something, you'll have to have A2018 or above 2019, 2020, 2021, 2022, 2023, 2024...