Boolean operations no longer work the same

[harrhunt]

I noticed that some boolean operations I had been using stopped working a few days ago. I went through the builds in the dev & CI actions and it looks like they work on
https://f20c6739.graphite.pages.dev/
but not on
https://fc501545.graphite.pages.dev/
I was specifically using subtract front, but it looks like some of the other boolean operations also have issues.

Recording.2025-06-24.100417.1.mp4

[harrhunt]

Here are links to the latest commits for each of those builds.
Works:
c1b15fc
Breaks:
b5975e9

[0HyperCube]

The reason for this is that «merge by distance» node uses an undirected graph. This means that the direction of the contour is not preserved.

Graphite/node-graph/gcore/src/vector/algorithms/merge_by_distance.rs

Line 13 in 11ba2cc

let mut short_edges = UnGraphMap::new();

Since this is rendered using the default non-zero fill rule, the hole will sometimes disappear.

[Keavon]

Ah, darn, not so easy after all to fix-up for duplicate points.

[Keavon]

Should be fixed now.

[harrhunt]

Thanks for the quick fix!