The LaTeX typesetting system uses a structured approach to declaring
typesetting environments. For LaTeX2e, the texdraw package
defines the texdraw environment. The TeXdraw environment is
started with a \begin{texdraw} command and terminated with an
\end{texdraw} command. All of the basic TeXdraw commands
can be used within the texdraw environment.
As an example, a LaTeX2e variant of an earlier example can be constructed as follows.
\documentclass{article}
\usepackage{texdraw}
...
\begin{document}
...
\newcommand{\tbox}[1]{%
\bsegment
\lvec (0 +0.25) \lvec (0.75 +0.25)
\lvec (0.75 -0.25) \lvec (0 -0.25) \lvec (0 0)
\textref h:C v:C \htext (0.375 0){#1}
\savepos (0.75 0)(*ex *ey)
\esegment
\move (*ex *ey)}
\begin{center}
\begin{texdraw}
\ravec (1 0) \tbox{$H(z)$} \ravec (1 0)
\end{texdraw}
\end{center}
...
\end{document}
This example illustrates the use of the LaTeX command
\newcommand as an alternative to the plain TeX command
\def. Instead of the basic TeXdraw command
\centertexdraw, a nested combination of the LaTeX centering
environment and the TeXdraw environment is used.
The texdraw package uses the printer driver interface provided by
the standard LaTeX2e graphics package. Any options to the
texdraw package are passed to the graphics package.
Specifically, the name of the PostScript driver to be used can be
specified as an option to the texdraw package. With no explicit
printer driver option, the default printer driver associated with the
graphics package is used.
The texdraw package can be used with any of the printer drivers
supported by the graphics package that allow for the importation
of PostScript graphics files, viz., dvips, xdvi,
dvi2ps, dvialw, dvilaser, dvipsone,
dviwindo, dvitops, oztex, psprint,
textures, pctexps, and pctexwin. Not all of these
drivers support the text rotation needed for the TeXdraw commands
\vtext and \rtext. Of the drivers listed above, only the
following support support text rotation: dvips, xdvi,
dvi2ps, dvitops, textures, and pctexps.
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