Baseline offset right metrics key misbehaves when @0

1

This one is hard to explain, so I made a simple test .glyphs file and a diagram below. Basically, if I use a baseline offset right metrics key at zero (=H@0 in the example) it calculates the sidebearing incorrectly if the bottom of the glyph is at y=0. Then if I use it on a similar glyph but with the bottom anywhere below y=0, it inexplicably adds 100 units, incorrect again. The same key on the left side bearing calculates correctly in all cases.

image
image1920×974 77.9 KB

baseline-offset-right-metrics-key.glyphs (6.8 KB)

This is on the latest stable Glyphs 3.1.2 (3151)

2

Intersecting an edge is a bit tricky. So it is advised to use a value that is inside the outline. e.g. =H@1

3

Thanks, I suspected that might be the case, although there doesn’t seem to be any problem doing it on the left side bearing.

4

Either case catches the left edge on the shape (the end of the path triggers the intersection, the start (of the right upwards segment doesn’t). So the LSB is ok.