Re: summary on shearing style for ruby

Sure --

Shearing is a simple transformation of the top corners to the left or right; 斜体 is archetypical (to me) in phototypesetting, where a barrel lens was introduced between the magnification lens and the film, producing various possible distortions: 

https://kotobank.jp/image/dictionary/nipponica/media/81306024011418.jpg


In the most popular case (45 degrees, 10-30 % distortion), the upper right and lower left corners of the CJK embox remain in place; the other corners are drawn in. Further rotation would produce the shear-like effect, but you have to also scale the shear to reproduce true 斜体. See my enclosed screenshot for the various differences. Also, when rotating the 斜体 to approximate shear, the centers of the glyphs should remain in the embox center of the line, I think, unlike in my screenshot.

--Nat

On 7/21/20, 1:09 AM, "Martin J. Dürst" <duerst@it.aoyama.ac.jp> wrote:

    Hello Nat,

    On 21/07/2020 09:49, Nat McCully wrote:
    > I think when we made InDesign 斜体 we consciously decided ruby were not to be transformed because they are annotations of the text and harder to read I’d made 斜体 as well.
    > Also, people sometimes think 斜体 is the same as shearing but it is not.

    Can you explain a bit? Wikipedia (https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fja.wikipedia.org%2Fwiki%2F%25E6%2596%259C%25E4%25BD%2593&amp;data=02%7C01%7Cnmccully%40adobe.com%7C46534e2b6dbc4d8412f108d82d4d6787%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637309157764808975&amp;sdata=C%2B%2Fvl7F7Rpn%2FYuCRX4raFmoa1UxmvZivCTyLlq86GVQ%3D&amp;reserved=0) has 
    a definition that seems equivalent to shearing, and links to 
    https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FOblique_type&amp;data=02%7C01%7Cnmccully%40adobe.com%7C46534e2b6dbc4d8412f108d82d4d6787%7Cfa7b1b5a7b34438794aed2c178decee1%7C0%7C0%7C637309157764818968&amp;sdata=v9RdPXHlL1Belnvh88uw1zPEtzW6JgL93PcgCul6tH0%3D&amp;reserved=0. Are you referring to slight 
    optic corrections on top of the geometrical shearing, or to something else?

    Regards,   Martin.