Technical design adjustment for interpolation

Hi!

In order to enable an interpolation (also with a view to a VF) from a straight condensed to a wide, round variant, this also requires 2 points in the curve extreme. Can/may these 2 (red marked) points be placed on top of each other or can this cause technical problems during export?

This “superimposing” could possibly be particularly important for an italic to prevent “kinks” in the curves.

(I would like to avoid an intermediate instance with a “design change”).

Greetz!

You can do that.

This will work for the roman, but you will get kinks in the italic. There is no better way (apart from upping the UPM)

OK, thank you! The information helps!

One more question: Is it technically the same if I set the grid division to 2, i.e. points can be at 10.5, for example, and then activate the user parameter “Scale to UPM: 2000” during export?

Currently, variable fonts are exported with TrueType outlines and those do not support fractional coordinates.

OK, then I’ll set the UPM to 2000(???), put the points on top of each other in the round type version and “hope” that there are no kinks in the italics …
:wink:

The kinks will only be a bit smaller.

That gives me courage …! :wink:
I probably won’t be able to manage completely without adjustments/corrections, but I will find a sensible way.
The measures and information mentioned above will definitely help!!!
Thanks!

If you want to interpolate along a slant/italic axis as well, you will run into an interpolation issue. See the this tutorial:

And look for ‘Avoiding Kinks’.