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< [[Graphics]]|[[Metafun]]|[[Metapost]]>__TOC__
ConTeXT provides a tight integration of TeX and [[Metapost]]. Metapost can used behind the scenes for some graphic trickery. This integration is also helpful for drawing figures in metapost and use them in the document. Some of the commonly used commands for this are
==<cmd>startMPenvironment</cmd>==This is used to change the body font for metapost graphics'''The [[manual:metafun-p. For examplepdf|MetaFun manual]]''', to get the text also available in metapost graphics in times, usea [[manual:metafun-s.pdf|screen version]].
<texcode>
\usetypescript[times][texnansi]
\switchtobodyfont[times,10pt]
</texcode>
==<cmd>startMPinclusions<Don’t miss the illustrations at 100% MetaFun page [https:/cmd>==This can be used for specifying metapost files to ''input'' and also to define metapost functions.For example<texcode>\startMPinclusions input boxes ; vardef my_metapost_fun(expr var)= ./art-aleatoire.com art-aleatoire]. enddef ;\stopMPinclusions</texcode>
==<cmd>startMPpage</cmd>==This produces a page containing containing metapost graphic. The resulting pdf is self contained (it has all the fonts embedded) This is useful if you want to send a brief overview of some of the figure to a coauthor or a journalcommonly used commands. For example, one can have
<texcode>\starttext\startMPpage draw fullcircle scaled 2cm ; dotlabel.bot(textext("(0,0)"),origin) ;\stopMPpage= ConTeXt System Overview =
\startMPpage draw fullcircle scaled 2cm ; drawarrow (0,0)[[File:ConTeXt--(1cm,0) ; labelSystem.bot(textext("$r$"),(5mm,0)) ;\stopMPpagepng|700px]]
\stoptext</texcode>= Commonly used commands =
Processing this file using<texcode>; {{cmd|defineMPinstance}}, {{cmd|setupMPinstance}}: used to set up MetaPost invocations with particular features. One use case could be to select a sans serif font for all MetaPost labels. texmfstart texexec --pdf filename</texcode>gives a pdf with two pages of graphics: {{cmd|startMPenvironment}} '''is DEPRECATED''' in which one could place settings that one only wanted to apply in the MetaPost environment, but not in the document itself. One should use {{cmd|defineMPinstance}} and {{cmd|setupMPinstance}}, instead.
==<; {{cmd>startstaticMPfigure</cmd>==<cmd>startuseMPgraphic</cmd> series of commands were designed for using metapost for drawing fancy frames and backgrounds and not for using <i>stand-alone</i> graphics for a document. <cmd>startstaticMPfigure</cmd> creates a separate pdf file containing the graphic. This pdf |startMPinclusions}}: Inside, one can be included in the document using <cmd>usestaticMPfigure</cmd>. Context is clever enough specify MetaPost files to recompile the resulting metapost file''input'', only if something inside the start stop staticMPgraphic has changedand also define MetaPost functions.
For example; {{cmd|startuseMPgraphic}},<texcode>\startstaticMPfigure{center{cmd|useMPgraphic}}: defines a piece of graphics code that is processed anew every time the graphic is placed with {{cmd|useMPgraphic}} draw fullcircle scaled 2cm ; dotlabel.bot(textext("(0,0)"),origin) ;\stopstaticMPfigure
\startstaticMPfigure; {radius{cmd|startreusableMPgraphic}} draw fullcircle scaled 2cm ; drawarrow (0,0)--(1cm{{cmd|reuseMPgraphic}}: For graphics that are the same every time,0) ; labelit is better to use {{cmd|startreusableMPgraphic}}: the graphic is compiled only once, and the one resulting picture can be placed at various points with {{cmd|reuseMPgraphic}}.bot(textext("$r$"),(5mm,0)) ;\stopstaticMPfigure
\starttext; {{cmd|startMPcode}}: When reusing a graphic is not important, you can simply use {{cmd|startMPcode}}.
Circle centered \usestaticMPfigure[center][width=1cm] at origin with radius\usestaticMPfigure[radius][width=1cm] $r=1\,\text; {cm{cmd|startMPpage}}$: produces a page a containing MetaPost graphic. The page is just large enough to contain the graphic. The resulting pdf is self-contained (it has all the fonts embedded). This is useful if you want to send the figure to a coauthor or a journal.
\stoptext; {{cmd|startstaticMPfigure}}, {{cmd|usestaticMPfigure}}: The {{cmd|startuseMPgraphic}} series of commands were designed for using MetaPost for drawing fancy frames and backgrounds and not for using <i>stand-alone</texcodei>graphics for a document. {{cmd|startstaticMPfigure}} creates a separate pdf file containing the graphic. This pdf can be included in the document using {{cmd|usestaticMPfigure}}. ConTeXt is clever enough to recompile the resulting MetaPost file only if something inside the {{cmd|startstaticMPfigure}} has changed.
* '''center''' = Documentation and '''radius''' above are ''labels'' that are used to access the figure.* <cmd>usestaticMPfigure</cmd> takes the first argument as the ''label'' of the figure to be inserted. The second argument has the same options as the second argument of <cmd>externalfigure</cmd>* To force the figure files to be regenerated, remove all the <code>*.mp.md5</code> files from the current directory.links =
fix pragma links & typos
MetaFun is ConTeXt’s extension of the [[MetaPost]] language. It provides a tight integration of both TeX and [[MetaPost]]. MetaPost can used behind the scenes for some graphic trickery. This integration is also helpful for drawing figures in MetaPost and use them in a document.
* [[manual:mmakempy.pdf|MakeMPY]]: create MetaPost outlines (by Pragma)
* [[Flow Charts|FlowCharts]]: encapsulated application, demonstration of MetaPost/MetaFun
* [http://www.pragma-ade.nl/general/sources/mptopdf.pdf MPtoPDF]: create PDF from MetaPost (by Pragma)
* [http://www.pragma-ade.nl/show-gra.pdf a few examples of MetaPost graphics]
* [http://www.pragma-ade.nl/articles/art-puzz.pdf Puzzling graphics in MetaPost] (article)
* [http://www.ntg.nl/maps/25/15.pdf metapost metafun. Hans Hagen at MAPS]
* [[Fill Patterns|FillPatterns]]: Fill pattern examples using MetaPost/MetaFun
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[[Category:Graphics]]
[[Category:Metapost]]
{{MetaPost see also}}
{{Metapost navbox}}
