MPinstance

MPinstance

[dr. Hans van der Meer]

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?

Hans van der Meer

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: MPinstance

[Hans Hagen]

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


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
       tel: 038 477 53 69 | www.pragma-ade.com | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: MPinstance

[Alan BRASLAU]

On Thu, 7 Apr 2016 12:14:39 +0200
Hans Hagen <pragma@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
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: MPinstance

[Meer, Hans van der]

[-- Attachment #1.1: Type: text/plain, Size: 559 bytes --]


Alan Braslau wrote:

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


Does this mean that \startMPdefinitions is identical (in effect) with \startMPextensions? Its use here seems to suggest.
Or if otherwise, what is the difference in usage?

Hans van der Meer


[-- Attachment #1.2: Type: text/html, Size: 13132 bytes --]

[-- Attachment #2: Type: text/plain, Size: 485 bytes --]

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________