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[Groff] PS font metrics change (again)
From: |
Werner LEMBERG |
Subject: |
[Groff] PS font metrics change (again) |
Date: |
Tue, 21 Jan 2003 15:41:26 +0100 (CET) |
I have changed the PS font metrics again, using a new switch to
afmtodit (-m, don't allow negative left italic correction values --
internally, afmtodit calls the left italic correction `left math
fit').
The old fonts didn't behave well with eqn -- this preprocessor uses
\,X\/
(X an arbitrary glyph) almost everywhere to get mathematical spacing.
While reading the source code of eqn I found out that it checks
whether the left and/or right glyph is italic, emitting \, (\/) only
if the previous (next) glyph is roman. I wonder why.
Consider this:
$f f$
With TeX, the two (italic) f's are clearly separated, while with eqn
the two glyphs almost touch.
Compare this with
.ft I
f\/\,f
and you see what I mean.
I'm going to remove this code since I can't imagine a situation where
this feature is needed. For inserting real words (and not
single-letter variables) just quote it like this: "ff".
Werner