The ability to draw various tangent lines. This will definitely help a lot of Logo designer who work with geometry a lot.

When using the Pen (Path) tool I wish there was a way to to make adjacent arcs tangent to one another. Basically I just wish that Illustrator would act more like Corel, AutoCAD, or Solid Works in the way that the user has the ability to alter the shape characteristics of adjacent line segments. This would help immensely when creating ovoid/ ellipse forms and instead of eyeballing the shape to get it right, one could just click on the 'tangent' feature and it would automatically correct itself.

Idea: an option to snap to curves tangentially.

Why is it important: for logo and icon designs, for illustrations and technical illustrations, and for shapes like metaballs and blobs in backgrounds and patterns.

Thanks for listening!

Ah, so you mean 'relations' like in SolidWorks, Sketch Relations?
https://help.solidworks.com/2021/english/SolidWorks/sldworks/c_description_of_sketch_relations.htm

Yes, these would be cool. Equal and Fix specifically.
As far as I know, this is impossible to replicate exactly for now for plugins, and the closest toolset you can get to have this today is SubScribe by Astute Graphics.

Yea so basically if you look at the picture I've attached I just mean being able to make lines or shapes parallel, equal, tangent, etc. Things like that.

Brandon, can you show some examples or mockups, please?
What kind of constraints and relations? Controlled how? For what?
The term is super wide, so some clarification can help.

Has probably been said a number of times but I'll add to that. Would love to see illustrator have the ability to add constraints/relations to lines and/or shapes. It's a super helpful tool in other programs and would just make it that much easier to make designs super crisp and perfect looking.

For a vector based software, I think Illustrator's snapping features should be improved like AutoCAD implementation. I can't see why this is impossible.

You mean something like this?
https://help.solidworks.com/2020/english/SolidWorks/sldworks/c_Sketch_Relations_Icons.htm

Since you are here, please also vote for this related request about the ability to actually add points at tangents:
https://illustrator.uservoice.com/forums/333657/suggestions/33438667

Meanwhile there is a plugin that allow to create tangent points with ease, PathScribe/InkScribe by AstuteGraphics.
It does not mean Ai should not have these by default, of course.

Also, please vote for this related request, which is about having snaps to tangent points:
https://illustrator.uservoice.com/forums/333657/suggestions/34733398

Constraints could be interesting. If we're asking for engineering tools, a drawing scale setting could be interesting, too. I will usually do large drawings that need to be scale-accurate as 1-mm:1-in, but it would be cool to be able to use dimension palettes with native dimensions and just have the drawing scale.

In SOLIDWORKS there is a feature to assign lines/shapes a relationship (parallel, perpendicular for straight lines; concentric, cordial for circles; etc.). And one of the most useful is the tangent relationship.

I would like to be able to, with the click of a button, assign a pair of lines/shapes a certain relationship that is persistent and updates all related elements when moved, rotated, etc. This would be similar to the join commant that allows two points to be connected and act as a single piece.

This would speed up a lot of the work I do with icons etc, where a geometric and engineering style approach is required.

Crude illustration attached of SOLIDWORKS interface.

Seriously. I can't believe this is not yet in Illustrator after 20 years. Basic AutoCAD like snapping is a necessity.

Besides this, you also need to be able to snap to a line extension BEFORE you drag a line out, for example to plot a new point with the pen tool that is co-linear with an existing line. I can't say how many times (probably in the tens of thousands) in my career when I have had to drag out a construction line extension just so i can start a new line that is co-linear, or at least starts co-linear with an existing line, and then delete the construction line when i am done.

I agree, and asked the same thing thing to be added as options in smart guides from Glyphs (revealed in the last Beta version available.

Please add tangents. It's ridiculous this is not implemented in 2019.

Yes please. Why is this not a boiler plate feature of a program that has been around for 20 years +????

Adobe, you need to look at professional CAD software in general. Illustrator ***still*** lacks some fundamental line-based drawing tools, like vector trim, offset, tangent detection, and so many more.

I'd like to request a Smart Guide when drawing lines for when you are over a curve and the line is tangent to a curve.

For Example:

Draw a circle by plotting 2 points + defining radius
Draw a circle by plotting 3 points

More object snapping options:
Snap to tangent
Snap to parallel
Snap to Perpendicular
Options to turn various snaps on/off