I am glad to see that I am not alone being confused...
We have:
\defineMPinstance
[name]
[\s!format=metafun,
\s!extensions=\v!yes,
\s!initializations=\v!yes,
\c!method=\s!default,
\c!textstyle=,
\c!textcolor=]
also, \setupMPinstance
So that extensions=yes|no and initializations=yes|no controls the use
of MPextensions and MPinitializations. It seems that extensions is
intended for all instances ("when enabled").
From what I can see, extensions are read "once", initializations "each",
and inclusions are intended for the "user". It appears that
initializations is used to pass dynamic things from ConTeXt to MP.
I still have not figured out how to specify MPinclusions for a
particular instance.
It would be nice for someone who understands this all to explain it.
Alan
On Thu, 14 Feb 2013 14:01:44 +0100
Marco Patzer <home...@lavabit.com> wrote:
> On 2013–02–14 Marco Patzer wrote:
>
> > Now I can use “n” in all MP instances (unless switched off for the
> > particular instance). I'd like to define some variables only visible
> > in instance “foo”. Something like
> >
> > \startMPinitializations [foo]
> > numeric n; n=4cm;
> > \stopMPinitializations
>
> What I was looking for was (it's even mentioned in the manual):
>
> \startMPdefinitions{foo}
> …
> \stopMPdefinitions
>
> That means we have:
>
> - MPdefinitions (for instance-local definitions)
> - MPinclusions (global definitions)
> - MPinitializations (global definitions, can be disabled for an MP
> instance)
> - MPextensions (???, seems to be the same as MPinitializations)
>
> And all four include code for use within MP graphics. That really is
> confusing!
>
> > Maybe I'm missing the obvious here.
>
> Yes, I did :)
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