When I got a “light”, a “regular” and a “black” master, and I’ve already kerned “light” and “black”, is there a way to generate interpolated values for “regular”?
By the way:
I need the “regular” to better control the shapes.
importing kerning from a generated .otf won’t work, because classes and nice-naming of the cyrillic letters will be renamed in final .otf (even without choosing “production glyph names”)
thanks for your fast reply!
I did that already: unfortunately when interpolating the regular (by exporting .otf) the interpolated font-file has changed kerning-groups and glyph-names:
– the nice-named “de-cy” becomes “decy”
– and it’s left-kerning class changes from “de-cy” to “de-cy” as well and more over its right class “tse-cy” turns to a class named “H”
–> so more than 1/3 of kernpairs can not be copied to the original 3-master file (as its data is not the same any more)
Instead of interpolating the regular by exporting .otf you should interpolate it through Font > Generate Instances.
FWIW, I personally think Generate Instances should allow me to select the one(s) I want. In practice I almost always want only one instance generated. Having to close all others can be a bit of a hassle.
I recently needed to do it more often in a row because I needed to see if a custom parameter and the recalculation of the features would work as expected. I didn’t count, but I admit it was certainly less than 50 times.
Do you know about my plugin »Kernschmelze«? It comes along with the Kernkraft plugin. It needs 2 masters having kerning and you can assign the other masters to either copy or interpolate the kerning. It doesn’t work as a Custom Parameter (yet, AFAIK), but it’s just a few clicks. So maybe just applying kerning to the other masters once in a while is bringing you far enough?!
Does it round off kerning values differently from Glyphs?
If I interpolate kerning in glyphs, by removing the intermediate master and generating an instance, kerning for AV is -156, and if I do it with Kernschmelze, kerning for AV is -155. all the values are +1 in kerning output by Kernschmelze.
Where f is the position on the interpolation axis. The kern values a and b are integers themselve, but the result will still mostly be a float due to f. So this is probably the point where I need to implement the same rounding that Glyphsapp uses. Thanks for reporting, @Rui_Abreu