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Bug#421577: marked as done (texlive-metapost: latexMP gets bounding box wrong)

Your message dated Mon, 30 Apr 2007 22:10:43 -0400
with message-id <20070501021043.GF23897@amaryllis.bostoncoop.net>
and subject line Bug#421577: texlive-metapost: latexMP gets bounding box wrong
has caused the attached Bug report to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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--- Begin Message --- 
Package: texlive-metapost
Version: 2007-5
Severity: normal

latexMP will in some cases get the bounding box wrong, particularly
when there is a minus sign.  In the example below, the two labels come
out with different bounding boxes: the second one goes about .9pt
below the baseline, for some strange reason.  (Possibly this is a
problem with the font rather than latexMP.)

##################################
input latexmp;
setupLaTeXMP(class="amsart",
	     fontencoding="T1",
	     textextlabel=enable);

beginfig(0);
  label.top(textext("$1$"), (0,0));
  label.top(textext("$-1$"), (10pt,0));
endfig;

end



##################################
other files


-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (50, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.18
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages texlive-metapost depends on:
ii  libc6                         2.5-4      GNU C Library: Shared libraries
ii  texlive-base                  2007-4     TeX Live: Essential programs and f
ii  texlive-common                2007-4     TeX Live: Base component

Versions of packages texlive-metapost recommends:
ii  feynmf                        1.08-3     set of LaTeX macros for creating F

Versions of packages tex-common depends on:
ii  debconf                       1.5.13     Debian configuration management sy
ii  ucf                           2.0021     Update Configuration File: preserv

Versions of packages texlive-metapost is related to:
pn  tetex-base                    <none>     (no description available)
ii  tetex-bin                     2007-4     TeX Live: teTeX transitional packa
pn  tetex-extra                   <none>     (no description available)

-- debconf information:
  tex-common/check_texmf_wrong:
  tex-common/check_texmf_missing:
  tex-common/singleuser: false

--- End Message ---
--- Begin Message --- 
On Mon, Apr 30, 2007 at 02:44:30PM +0200, Ralf Stubner wrote:
> Dylan Thurston wrote:
> > Package: texlive-metapost
> > Version: 2007-5
> > Severity: normal
> >
> > latexMP will in some cases get the bounding box wrong, particularly
> > when there is a minus sign.  In the example below, the two labels come
> > out with different bounding boxes: the second one goes about .9pt
> > below the baseline, for some strange reason.  (Possibly this is a
> > problem with the font rather than latexMP.)
> 
> Do you get the same bounding box for $+1$ as for $-1$? If yes, then this
> is indeed a font issue. For TeX '-' and '+' have the same height and
> depth. This is important so that $\sqrt{x+y}$ and $\sqrt{x-y}$ are
> rendered with identical square-root signs. As a work around, you could try
> something like $\smash{-}1$ (sorry not tested).

Indeed, your explanation for this behaviour seems to be entirely
correct, and this is not a bug.  Thanks!

--Dylan Thurston

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