On Thu, 7 Apr 2016 12:14:39 +0200
Hans Hagen <pra...@wxs.nl> wrote:
> On 4/7/2016 11:20 AM, dr. Hans van der Meer wrote:
> > I do not understand the info in the ConTeXt wiki on setupMPinstance.
> >
> > The syntax is specified as \setupMPinstance[...][...,...=...,...0
> > [...] name
> > format metafun mpost
> > etc.
> >
> > I read this as:
> > in the first argument one can specify a name presumably a name
> > specified on \defineMPinstance. in the second argument
> > [format=metafun] specifies the format. But then the example under
> > Usage gives: \setupMPinstance[metafun][...]
> > Why metafun in the first instead of the second argument as implied
> > in the syntax description? I get confused here.
> >
> > Also in the description \startMPextensions and
> > \startMPinitializations are mentioned, but their descriptions are
> > missing from the list given in the page MetaPost in ConTeXt. How
> > are these described and what is the specific purpose of
> > \startMPextensions compared to \startMPinitializations? What is the
> > recommended use for them?
>
> you can look in m-graph.mkiv for an example of using instances
For example, I work with a "3D" instance of MP:
\defineMPinstance
[three]
[format=metafun,
extensions=yes,
initializations=yes,
method=double]
\startMPdefinitions{three}
input three ;
\stopMPdefinitions
Where three.mp contains my 3D projection macros.
Use is then
\startMPcode{three}
...
\stopMPcode
Alan
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