Lead lines again / incorrect position and the problem with overlapping lines

Hi, I didn’t say anything about lead lines for long time :slight_smile: so it’s time to change it.
1/ I have problem with lead lines generation - sometimes (and without Kerf) I define the starting point, but it doesn’t apply.
See the difference in cutting plan

2/ When I use “overlapping lines” optimization, there are no leading lines after line skipping. Or - sometimes - there are no optimizations. This is the same image, but in a new file - starting points are now generated correctly, but no optimizations for overlapping lines has gone.leads.lbrn (5.5 KB)

Lead in and ‘remove overlaps’ do not play nicely together at all, and at least part of that is a conscious choice by us, because it doesn’t really make sense to use them together. If you remove a section of a closed shape, you have created another starting point. Do we also add a lead line to that starting point?

For example, if I put these two squares together, and the circle is the start point, and the arrow is the cutting direction:
image

If the blue line is the shared edge between the two squares, it might be removed from the first square, resulting in this shape:

image

If we start from the selected starting point, the cut will be broken, and the second entry point no longer has a lead-in line.

Even worse, you could have chosen to place the lead-in line on the shared edge. If that edge was removed, the lead line would be removed as well.

I thought so. It’s just a reason to make “independent” lead lines, just like tabs are (choose manually or automatic for the whole layer). Anyway, I wrote this also to the fider - moving an object to another layer (because of other wanted lead line) makes mess in lead lines directions (left/right).
https://lightburn.fider.io/posts/828/assign-leads-inside-outside

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