Re: Incorrect rendering of * with UTF math fonts

[Khaled Hosny <khaledhosny@eglug.org>]

On Wed, Feb 22, 2012 at 02:52:22PM -0500, Aditya Mahajan wrote:
> Hi,
> 
> Using * in superscripts gives wrong glyph size and spacing.
> 
> For example, with LM math everyhing looks fine:
> 
> \starttext
> $x^*$ vs $x^{\ast}$
> \stoptext

For me this is typeset using LM Type1 fonts, not the OpenType LM math
font which explains why both are correct, after adding
\setupbodyfont[modern] the first * is raised than the other but still
readable.

> With Cambria, the result is OK (but you can still see the
> differences in the spacing of * in x^*)
> 
> \usemodule[simplefonts]
> \setmathfont[Cambria]
> \starttext
> $x^*$ vs $x^{\ast}$
> \stoptext
> 
> With Neo Euler, $x^*$ look really bad.
> 
> \usemodule[simplefonts]
> \setmathfont[Cambria]
> \starttext
> $x^*$ vs $x^{\ast}$
> \stoptext
> 
> I cannot figure out why this is happening. It definitely looks like
> a bug at the context end rather than a bug with the fonts.

It seems that * in math mode should map to U+2217 (which is what \ast
maps to) and not the ASCII asterisk.

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

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________