mf­pic – Draw Meta­font/post pic­tures from (La)TeX com­mands

Mf­pic is a scheme for pro­duc­ing pic­tures from (La)TeX com­mands. Com­mands \mf­pic and \endmf­pic (in LaTeX, the mf­pic en­vi­ron­ment) en­close a group in which draw­ing com­mands may be placed.
The com­mands gen­er­ate a Meta-lan­guage file, which may be pro­cessed by Me­ta­post (or even Meta­font). The re­sult­ing im­age file will be read back in to the doc­u­ment to place the pic­ture at the point where the orig­i­nal (La)TeX com­mands ap­peared. Note that the abil­ity to use Me­ta­post here means that the pack­age works equally well in LaTeX and PDFLaTeX.