From: Ulrike Fischer <news3@nililand.de>
To: ntg-context@ntg.nl
Subject: Re: two nested \mathbin command changes spacing
Date: Tue, 1 May 2018 12:01:13 +0200 [thread overview]
Message-ID: <1wsl85k13i12o.dlg@nililand.de> (raw)
In-Reply-To: <fcdbdd59-536d-aa52-6af8-4d8c469022cf@xs4all.nl>
Am Tue, 1 May 2018 10:12:42 +0200 schrieb Hans Hagen:
> On 4/30/2018 6:50 PM, Ulrike Fischer wrote:
>> In the following document the second a is much nearer placed to the
>> V:
>>
>> \starttext
>> $V \mathbin{a} W \qquad V \mathbin{\mathbin{a}} W $
>> \stoptext
>>
>> (in the second case an italic kern seems to be missing)
>>
>> Can one avoid this side effect of nested \math-command? When
>> building symbols it is not always easy to avoid such nestings.
> it becomes a chicken-egg issue because one can argue that a wrapped
> mathbin is no longer a pure bin and so ... it's again an indication that
> a wrong boundingbox (width) relying on always some kind of italic to fix
> it is a bad approach
Well yes, I already suspected this when I saw "italic" in the log.
What would be a better approach?
The question who started the investigation wanted to get a binary
symbol "\hat{\otimes}". How does one define it so the spacing is
correct? It doesn't need be the fontloader that catches all the
case. It would be quite okay to insert some code that says "hey
handle me like \otimes". And it would also okay to assume a "good
font".
But even with cambria it doesn't work correctly in context
currently. The displacement is slight (only 0.3pt) but at large zoom
one can see it:
%\setupbodyfont[cambria] %without it the spacing is more pronounced
\starttext
$ V \otimes W $
$ V \mathbin{\hat{\otimes}} W $
$ V \Umathchar 2 0 "2297 W $
$ V \mathbin{\Umathchar 0 0 "2297} W $
$ V \mathbin{\Umathchar 2 0 "2297} W $
$ V \mathbin{\Umathaccent 0 0 "302 \Umathchar 0 0 "2297} W $
\stoptext
--
Ulrike Fischer
http://www.troubleshooting-tex.de/
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next prev parent reply other threads:[~2018-05-01 10:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-30 16:50 Ulrike Fischer
2018-05-01 8:12 ` Hans Hagen
2018-05-01 10:01 ` Ulrike Fischer [this message]
2018-05-17 21:47 ` Hans Hagen
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