From: Marco Patzer <homerow@lavabit.com>
To: ntg-context@ntg.nl
Subject: Re: MetaPost instance mechanism broken
Date: Mon, 26 Nov 2012 17:10:07 +0100 [thread overview]
Message-ID: <20121126171007.1ac3c68c@homerow> (raw)
In-Reply-To: <CAF=dkzxK=_+RrZ-4_gBGQiXasYUNs=EWTTMyNNFOX=nm98H2Zg@mail.gmail.com>
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2012-11-26 Sietse Brouwer:
> Since I don't use MetaPost, I don't think I'm the best person to
> document this. But I took this as an opportunity to create the command
> reference pages for a bunch of the \...MP... commands; perhaps one of
> you could add this info to the proper page(s)?
Thanks. I added some info about the change mentioned in this thread.
> Also: a question about
> \startuseMPgraphic and
> \startuniqueMPgraphic.
> Both are supposed to be recompiled at every usage, so how are they
> different? Actually trying it out suggests that useMPgraphic is the
> only one of the two that re-evaluates its code every time; compare the
> examples at
AFAIK useMPgraphic is always recalculated, reusableMPgraphic never
is. uniqueMPgraphic takes the size into account and recalculates if
the graphic dimensions change. If I recall correctly this is
mentioned somewhere in the MetaFun manual. But I agree, all these
commands for including MP graphics are confusing, given the fact
that one can survive pretty well with only useMPgraphic. I attached
a small example to show the difference.
Marco
[-- Attachment #2: t.tex --]
[-- Type: text/x-tex, Size: 1042 bytes --]
\startuseMPgraphic{alpha}
fill unitsquare
xyscaled (\overlaywidth, \overlayheight)
withcolor (uniformdeviate 1, uniformdeviate 1, uniformdeviate 1);
\stopuseMPgraphic
\defineoverlay
[alpha]
[\useMPgraphic{alpha}]
\startreusableMPgraphic{beta}
fill unitsquare
xyscaled (\overlaywidth, \overlayheight)
withcolor (uniformdeviate 1, uniformdeviate 1, uniformdeviate 1);
\stopreusableMPgraphic
\defineoverlay
[beta]
[\reuseMPgraphic{beta}]
\startuniqueMPgraphic{gamma}
fill unitsquare
xyscaled (\overlaywidth, \overlayheight)
withcolor (uniformdeviate 1, uniformdeviate 1, uniformdeviate 1);
\stopuniqueMPgraphic
\defineoverlay
[gamma]
[\uniqueMPgraphic{gamma}]
\starttext
\dontleavehmode
\framed[background=alpha]{foo}
\framed[background=alpha]{foo}
\framed[background=alpha]{foobar}
\dontleavehmode
\framed[background=beta]{foo}
\framed[background=beta]{foo}
\framed[background=beta]{foobar}
\dontleavehmode
\framed[background=gamma]{foo}
\framed[background=gamma]{foo}
\framed[background=gamma]{foobar}
\stoptext
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next prev parent reply other threads:[~2012-11-26 16:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-25 17:11 Marco Patzer
2012-11-25 17:40 ` Wolfgang Schuster
2012-11-25 17:40 ` Aditya Mahajan
2012-11-25 18:05 ` Marco Patzer
2012-11-26 14:32 ` Sietse Brouwer
2012-11-26 16:10 ` Marco Patzer [this message]
2012-11-26 16:46 ` Aditya Mahajan
2012-11-26 16:50 ` Hans Hagen
2012-12-06 19:10 ` Marco Patzer
2012-12-06 22:12 ` Hans Hagen
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