On Wed, 2017-12-27 at 15:44 -0700, Alan Braslau wrote:

On Wed, 27 Dec 2017 22:44:50 +0100 Hans Hagen wrote:

...

On 12/27/2017 7:01 PM, Alan Braslau wrote:

...

Why is the \vec{} arrow too short in some cases? Compare $\vec{X}$ to $\vec{Y}$.

The MWE below looks wrong in the default font and is even uglier when pagella is used.

Alan

%\setupbodyfont [pagella]

\starttext $\vec{X}$ vs. $\vec{Y}$ \stoptext

As this is has been the logic in tex font design for more than 3  decades, there's not much that we can do about it apart from patching  the font (doable but somewhat nasty and boring as we then need to patch specific elements of (each) hvariant and it falls in the category "hard to motivate myself for").

\showglyphs

\starttext      \start          \dorecurse{50}{$\vec{\blackrule[width=#1pt]}$\space}\unskip\par      \stop      \blank      \start          \switchtobodyfont [pagella]          \dorecurse{50}{$\vec{\blackrule[width=#1pt]}$\space}\unskip\par      \stop      \blank      \start          \switchtobodyfont [cambria]          \dorecurse{50}{$\vec{\blackrule[width=#1pt]}$\space}\unskip\par      \stop \stoptext

Shows that it's a font design issue: the extensible has a threshold  related to the middle part and it should (1) have at least one more  fixed size, or (2) have one fixed size and for the rest be extensible  but that would be somewhat inefficient ion most cases, so (3) here we  have a trade-off.

Just blame the font ... cambria is (of course) ok.

Hans

Even Computer Modern!

Do you mean to tell me that the TeX Gyre fonts are all "broken"? And that the *only* correctly working font is ... Cambria?

So following up on the font discussion at the last ConTeXt meeting, must we conclude that *all* of the fonts that we distribute with the Standalone are to be avoided, and that one must pilfer the MicroSoft font in order to typeset mathematics correctly?

Lucida OpenType looks okay (if you have it). \setupbodyfont[lucidaot] \starttext $\vec{X}$ vs. $\vec{Y}$ \stoptext

Alan ___________________________________________________________________________________ If your question is of interest to others as well, please add an entry to the Wiki!

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