slnt blending

[dberlow]

As with the other User axes, wght, opsz, wdth and GRAD, I propose that slnt be an axes that is blended from parametric axes.

In the case of RobotoAvar2, this is to include the use of several parametric axes, though it is possible that more or fewer will be required.

As listed here previously, https://docs.google.com/spreadsheets/d/1lZcLW7xo39zG3TTv6EK3iLs5t8OjWWPJv0lb9qEnsDE/edit this will include VROT, to blend unslanted but rather rotated glyphs like *, single stroke accents like grave, quotes, slashes and other glyphs, parts of glyphs where a blend of rotation and slanting must be used.

A parametric axis for slant variations has, in addition, been added to the same proposal linked to above as VANG, Variable angle, for the angles that will need to be blended for slnt, since slant is not complete with a single angle control for all glyphs of all styles of slnt.

Along with these two axes, it is typical to perform a different blend of XOPQ, YOPQ and XTRA, versus the upright version. In addition, RobotoAvar2 will require and axis controlling the length of straight side on round shapes, (O, 0 and o, e.g.) to prevent severe distortions in the narrow styles of slnt and all styles of the Roboto figure 0, e.g.

Finally, it is possible that round terminals need to be blended, as the ROND axis of slnt will have different point locations to achieve the round terminals that do not appear to be simply slanted.

Your feedback would help us move move forward, thanks.

[sannorozco]

Updated design spaces for blending slnt from VANG & VROT parametric axis. Testing HOH*H.

Continuing with the lists to define what needs to be angled and what needs to be rotated.

[sannorozco]

The two axis ANG & VROT have been implemented on ascii.

[davelab6]

Wow, this is very ambitious. I love it! I can see that re-use of XOPQ, YOPQ and XTRA to blend the slnt axis should result in additional file-size savings versus a complete set of gvars for slnt. I'd like to hop on a call with Santiago to give a visual tour of how this is working so far :)