I’m trying to get variable fonts with opsz axis to work and hoping I can get some help.
I have two masters in the glyphs file: one for the largest setting and one for the smallest. These are intended for 144pt and 24pt respectively. On the axis I’ve set up in the glyphs file, they are set at 33 for the 144pt cut and 120 for the 24pt cut. (The numbers I’m using are from the stem measurements, so as the intended setting size goes up the plotting on the axis goes down, since the stems get finer larger.)
I gather I want to set up axis mapping as described in the variable font tutorial, but since this is opsz rather than weight I’m a bit confused.
I have a sense of the shape of the curve I want from the instances (styles) I’ve set up:
144pt - 33
90pt - 43
72pt - 50
60pt - 57
48pt - 68
36pt - 85
30pt - 99
24pt - 120
But are these the numbers that go into the mapping table, or do I need to do something more like the tutorial says with weight, that is, set evenly spaced figures in the left column? And these certainly can’t go straight into the parameter, since the parameter expects the extremes to match, right?
And I assume I’ll want to add an Axis Location parameter to the masters, since the intended pt size will be a meaningful number to the user (vs. the stem size in upm). But if I do that do I then need to use that reconfigured (and in this case reversed) set of numbers in the mapping table?