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+% \iffalse meta-comment
+%
+% Copyright 1993-2016
+% The LaTeX3 Project and any individual authors listed elsewhere
+% in this file.
+%
+% This file is part of the LaTeX base system.
+% -------------------------------------------
+%
+% It may be distributed and/or modified under the
+% conditions of the LaTeX Project Public License, either version 1.3c
+% of this license or (at your option) any later version.
+% The latest version of this license is in
+% https://www.latex-project.org/lppl.txt
+% and version 1.3c or later is part of all distributions of LaTeX
+% version 2005/12/01 or later.
+%
+% This file has the LPPL maintenance status "maintained".
+%
+% The list of all files belonging to the LaTeX base distribution is
+% given in the file `manifest.txt'. See also `legal.txt' for additional
+% information.
+%
+% The list of derived (unpacked) files belonging to the distribution
+% and covered by LPPL is defined by the unpacking scripts (with
+% extension .ins) which are part of the distribution.
+%
+% \fi
+% \iffalse
+%%
+%% File `graphpap.dtx'.
+%% Copyright (C) 1994 by Leslie Lamport
+%% all rights reserved.
+%%
+%
+%<package>\NeedsTeXFormat{LaTeX2e}
+%<package>\ProvidesPackage{graphpap}
+%<package> [1994/08/09 v1.0c Standard LaTeX graphpap package (LL)]
+%
+%<*driver>
+\documentclass{ltxdoc}
+\usepackage{graphpap}
+\GetFileInfo{graphpap.sty}
+\begin{document}
+\title{The \textsf{graphpap} package\thanks{This file
+ has version number \fileversion, last
+ revised \filedate.}}
+\author{Leslie Lamport}
+\date{\filedate}
+ \MaintainedByLaTeXTeam{latex}
+ \maketitle
+ \DocInput{graphpap.dtx}
+\end{document}
+%</driver>
+% \fi
+%
+%
+% \changes{v1.0b}{1994/04/28}{(DPC) convert to doc format}
+%
+%
+% |\graphpaper|\oarg{N}\parg{X,Y}\parg{DX,DY}
+% Makes a grid with left-hand corner at \parg{X,Y}, extending
+% \parg{DX,DY} units in the X and Y directions, where the lines are
+% \emph{N} units apart. Every fifth line is thick and is numbered.
+% The default value of \emph{N} is 10.
+% The arguments must all be integers.
+%
+% \StopEventually
+%
+% First, we define three counters. The first two are defined
+% as raw TeX counters since multiplication and division must be
+% performed in them.
+%
+% \changes{v1.0b}{1994/04/28}{(DPC) Remove allocations.}
+% \begin{macrocode}
+%<*package>
+% \newcount\@gridx% now (\@tempcnta)
+% \newcount\@gridy% now (\@tempcntb)
+% \newcounter{@grid}
+\let\c@@grid\count@
+% \end{macrocode}
+%
+% Next we define the following commands to draw vertical and horizontal
+% grids. The ``nonum'' commands just draw the grids; the other commands
+% also print numbers. All the arguments must be integers.
+%
+% VERTICAL GRIDS
+%
+% \noindent
+% |\@vgrid|\parg{xpos,ypos}\marg{xincrement}\\
+% | |\marg{number-of-lines}\marg{length-of-lines}
+%
+% \noindent
+% |\@nonumvgrid|\parg{xpos,ypos}\marg{xincrement}\\
+% | |\marg{number-of-lines} \marg{length-of-lines}
+%
+% HORIZONTAL GRIDS
+%
+% \noindent
+% |\@hgrid|\parg{xpos,ypos}\marg{yincrement}\\
+% | |\marg{number-of-lines}\marg{length-of-lines}
+%
+% \noindent
+% |\@nonumhgrid| same as |\@hgrid| but no numbers drawn
+%
+% \begin{macrocode}
+\def\@vgrid(#1,#2)#3#4#5{%
+ \setcounter{@grid}{#1}%
+ \multiput(#1,#2)(#3,0){#4}{\line(0,1){#5}}%
+ \multiput(#1,#2)(#3,0){#4}{\@vgridnumber{#3}}}
+% \end{macrocode}
+%
+% \begin{macrocode}
+\def\@vgridnumber#1{%
+ \makebox(0,0)[t]{%
+ \shortstack{\rule{0pt}{10pt}\\\arabic{@grid}}}%
+ \addtocounter{@grid}{#1}}
+% \end{macrocode}
+%
+% \begin{macrocode}
+\def\@nonumvgrid(#1,#2)#3#4#5{%
+ \multiput(#1,#2)(#3,0){#4}{\line(0,1){#5}}}
+% \end{macrocode}
+%
+% \begin{macrocode}
+\def\@hgrid(#1,#2)#3#4#5{%
+ \setcounter{@grid}{#2}%
+ \multiput(#1,#2)(0,#3){#4}{\line(1,0){#5}}%
+ \multiput(#1,#2)(0,#3){#4}{\@hgridnumber{#3}}}
+% \end{macrocode}
+%
+% \begin{macrocode}
+\def\@hgridnumber#1{%
+ \makebox(0,0)[r]{\arabic{@grid}\hspace{10pt}}%
+ \addtocounter{@grid}{#1}}
+% \end{macrocode}
+%
+% \begin{macrocode}
+\def\@nonumhgrid(#1,#2)#3#4#5{%
+ \multiput(#1,#2)(0,#3){#4}{\line(1,0){#5}}}
+% \end{macrocode}
+%
+% Finally, |\graphpaper| is defined in a straightforward way in terms of
+% the commands above.
+%
+% \begin{macro}{\graphpaper}
+% \changes{v1.0c}{1994/08/09}{(DPC) add \cs{leavevmode}}
+% \begin{macrocode}
+\newcommand\graphpaper[1][10]{\leavevmode\@grid{#1}}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\@grid}
+%
+% \changes{v1.0b}{1994/04/28}
+% {(DPC) convert ignore spaces between arguments}
+% \begin{macrocode}
+\def\@grid#1(#2,#3)#4{\@grid@i{#1}{#2}{#3}(}
+% \end{macrocode}
+% \end{macro}
+%
+% \begin{macro}{\@grid@i}
+%
+% \changes{v1.0b}{1994/04/28}
+% {(DPC) macro introduced}
+% \begin{macrocode}
+\def\@grid@i#1#2#3(#4,#5){%
+ \@tempcnta=#4\relax
+ \divide\@tempcnta#1\relax
+ \advance\@tempcnta1\relax
+ {\thinlines\@nonumvgrid(#2,#3){#1}{\@tempcnta}{#5}
+ \@tempcnta#4\relax
+ \divide\@tempcnta5\relax
+ \divide\@tempcnta#1\relax
+ \advance\@tempcnta1\relax
+ \@tempcntb5\relax
+ \multiply\@tempcntb#1\relax
+ \thicklines\@vgrid(#2,#3){\@tempcntb}{\@tempcnta}{#5}
+ \@tempcnta#5\relax
+ \divide\@tempcnta #1\relax
+ \advance\@tempcnta1\relax
+ \thinlines\@nonumhgrid(#2,#3){#1}{\@tempcnta}{#4}
+ \@tempcnta#5\relax
+ \divide\@tempcnta5\relax
+ \divide\@tempcnta#1\relax
+ \advance\@tempcnta1\relax
+ \thicklines\@hgrid(#2,#3){\@tempcntb}{\@tempcnta}{#4}}%
+ \ignorespaces}
+%</package>
+% \end{macrocode}
+% \end{macro}
+%
+% \Finale
+%
+