I’m trying to connect open curves, to that end, I found the matching curves by index: [afbeelding] To close the open curves, I need to connect the curve at i=0 with the curve at i=1, where i=0 is the start and i=1 is the end. In case both are the same index, it means the curve misses a segment. […

Et voilà: [image] Connect curves_volker5.gh (39.9 KB)

Never mind, I don’t need the unique sets for this problem, but rather the sets that overlap (with 3&4 or 4&3 in this case), so I can extend both their start and end for the intersection: [afbeelding] [afbeelding] Connect curves.gh (13.6 KB)

It’s actually pretty simple thinking about this. I have the indices of the curves, so to check branches with the same indices, I can sort them from low to high, then concatenate each branch to be able to treat them as single items. That way, I can use the sets components to find which items are uniq…

This problem has nothing to do with “unique sets”, and has everything to do with curve direction. Consequently, the above is not a solution. The way you are using Point Groups, the tree of indicies will already create unique sets of branches. This is easily evidenced by flattening the indices outpu…

Here is disambiguation: [image] Connect curves_volker2.gh (86.7 KB) I cheaped out and created the connections for the intersecting sets with lines drawn from the endpoints of the polylines to their interection point. If you wanted clean polylines, you would have to move the endpoints of these se…

Might have made a mistake with mixing up two different methods as it was getting late. I wanted to tackle one problem first and ended up doing something else later, thanks for checking. At least I learned how to find similar branches in the process. :wink: I figured out how I can close the open cur…

[image] Intuos: This baffles me too, since it is quite tedious to do manually. Since I’ll be using splines, I’ll have to go this route. Also, while Line | Line detects anti-parallel curves, it does not output which error is which: [afbeelding] That would at least let me do the bulk of the wor…

[image] Volker Rakow: This problem has nothing to do with “unique sets”, and has everything to do with curve direction. Besides, the thread title “Unique sets from set” is a meaningless mystery. :question: :roll_eyes:

[image] Volker Rakow: [image] Intuos: From there, I’ll look at extending the curves from start/ end to get the intersection. Working on this atm. That way, I won’t need any flipping. It’s better form to have your data appropriately structured; for the sake legibility when others try to de…

[image] Joseph_Oster: [image] Volker Rakow: This problem has nothing to do with “unique sets”, and has everything to do with curve direction. Besides, the thread title “Unique sets from set” is a meaningless mystery. :question: :roll_eyes: Initially, my problem was that the point group…

@Volker_Rakow I now remember why I opted for point groups, I first used Closest point which messes with the index values, whereas I should have used Closest points. [afbeelding] Closest point matching.gh (33.1 KB) Thanks for the help! I’ve got the tools to get this to work and will rework the lo…

Unique sets in tree - find and remove similar branches for closing curves

Grasshopper

Volker_Rakow (Volker Rakow) October 22, 2024, 6:24pm 15

Et voilà:

Connect curves_volker5.gh (39.9 KB)

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Unique sets in tree - find and remove similar branches for closing curves

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