search

googlefonts / science-gothic

Science Gothic, a libre variable font
Other
142 stars 4 forks source link

Anchors out of bounds #306

Closed kateliev closed 8 months ago

kateliev commented 9 months ago

@tphinney investigating the issue of the font not compiling under UFO+fontmake we discussed over private chat the there was anchor mismatch in glyph /m. Looking at the glyph in question it seems that the missing anchor is actually present but wildly out of sane glyph bounds.

image

This is only a speculation, but could it be that FL or fontmake is dropping the anchor because it is outside some given tolerance? Will have to investigate further.... Interesting enough this is happening only on slanted masters, perhaps it was due to some slanting error back then when we made those... or perhaps these were anchors with some smart formula that got lost?

Nevertheless I've experimented a bid and added new audit test to our toolset that will report such problems. The test found 64 possible candidates with anchors out of bounds on one or more layers, that i will manually check today.

kateliev commented 9 months ago

It seems that the affected glyphs are:

...all of which had a faulty anchor. As the anchor was not used anywhere in combination with these glyphs i just removed it.

kateliev commented 9 months ago

@tphinney this is now solved. I had to also regenerate some auto-glyph recipes. It is now fixed and the font builds again using UFO+fontmake.

tphinney commented 9 months ago

That was… “interesting”! sheesh