Tex sample metapost

A Quick MetaPost Example

This document gives a quick example of how to use MetaPost for graphics in plain TeX or AmSTeX. The files given here are written in plain TeX; the same methods work in AmSTeX.

The Files

First of all, here are the contents of file.tex:

\input epsf
Hi there:  \epsfbox{file.1}
\bye

And, here is the MetaPost file file.mp. It contains an arrow and the letter "A" just above the middle of the arrow.

beginfig(1);

z1=(0,0);
z2=(10mm,10mm);

drawarrow(z1--z2);
label.ulft(btex $A$ etex, .5[z1,z2]);

endfig;

bye

Creating and Viewing dvi Files

To create a dvi file, use the following commands. You don't need to run mpost a second time if you just update the tex file.

mpost file
tex file

To view the dvi file, use the commands:

dvips -o file.ps file
gv file.ps

Notes:

• The file file.1 produced by mpost is not really a PostScript file; therefore you cannot use gv to view it.
• For the same reason, xdvi will not show file.dvi.

Creating pdf Files

If you want to create a pdf file, modify the tex file to read as follows:

\catcode`\@=11
\input ifpdf.sty
\catcode`\@=\active

\ifpdf
  \input supp-pdf
  \def\epsfbox#1{\hbox{\convertMPtoPDF{#1}{1}{1}}}
\else
  \input epsf
\fi

Hi there:  \epsfbox{file.1}
\bye

Then use the following commands to produce the pdf file:

mpost file
pdftex file

• Again, it is not necessary to run mpost if it has already been run since file.mp was last updated.
• The above file can also be used to produce a dvi file.
• The two \catcode lines are needed only for amstex. They can be omitted for plain TeX.