%
% bxeepic.sty
%

%% package declarations
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{bxeepic}[2013/04/28 v0.2]

%% preparation
\def\bxpz@ee@pkgname{bxeepic}
\def\bxpz@ee@error{\PackageError\bxpz@ee@pkgname}
\def\bxpz@ee@warn{\PackageWarning\bxpz@ee@pkgname}
% (errors)
\def\bxpz@warn@peald#1{\bxpz@ee@warn
  {Option '#1' ignored (pict2e already loaded)}}
\def\bxpz@warn@wnpnt{\bxpz@ee@warn
  {Poly-line commands need at least two vertices.}}
\def\bxpz@warn@wnstr{\bxpz@ee@warn
  {Blank lines due to too low stretch value.}}
% (globals)
\newif\ifbxpz@injoin
\newif\ifbxpz@dashset
\newif\ifbxpz@eepic@dotl
\newif\ifbxpz@uselbl
\newif\ifbxpz@first
\chardef\bxpz@boxa=8

%% public parameters
%%<*> \dashlinestretch
\def\dashlinestretch{0}
%%<*> \drawlinestretch
\def\drawlinestretch{0}
%%<*> \maxovaldiam
\newdimen\maxovaldiam \maxovaldiam=40pt
%%<*> \epictopgridlabelsep
\def\epictopgridlabelsep{2mm}
%%<*> \epicbottomgridlabelsep
\def\epicbottomgridlabelsep{2\unitlength}
%%<*> \epicsidegridlabelsep
\def\epicsidegridlabelsep{\spacewidth}
%% other initial settings
\AtEndOfPackage{%
  \drawlines
  \eepicdottedlines
  \def\bxpz@tmpa{20pt}%
  %\ifx\maxovalrad\bxpz@tmpa \def\maxovalrad{.5\maxovaldiam}\fi
}

%% internal parameters
\def\bxpz@dashlen@drawline{10pt}
\def\bxpz@setdash@phase{0}
\def\bxpz@dflt@linecap{0}
\def\bxpz@dflt@linejoin{0}

%% dvipdfmx option
\IfFileExists{p2e-dvipdfmx.def}{}{%else
  % if pict2e lacks of proper support of dvipdfmx
  \@ifpackageloaded{pict2e}{}{%else
    \DeclareOption{dvipdfmx}{%
      \PassOptionsToPackage{dvipdfm}{pict2e}%
      \def\bxpz@begin@picture@hook{\let\pdfliteral\bxpz@pdfliteral}%
      \def\bxpz@pdfliteral##1{\special{pdf:literal ##1}}%
      \let\bxpz@org@@picture\@picture
      \def\@picture{\bxpz@begin@picture@hook \bxpz@org@@picture}%
    }%
  }%
}
%% option handling
\newif\ifbxpz@safe
\DeclareOption{safe}{\bxpz@safetrue}
\DeclareOption{nosafe}{\bxpz@safefalse}
% other options are passed to pict2e
\@ifpackageloaded{pict2e}{%
  \DeclareOption*{\bxpz@warn@peald\CurrentOption}%
}{%else
  \DeclareOption*{\PassOptionsToPackage{\CurrentOption}{pict2e}}%
}%
\ExecuteOptions{nosafe}
\ProcessOptions*

% load pict2e if not done
\@ifpackageloaded{pict2e}{}{\RequirePackage{pict2e}}

% pretend that epic & eepic are already loaded
\@namedef{ver@epic.sty}{2100/01/01}
\@namedef{ver@eepic.sty}{2100/01/01}

%%------ mode-dependent stuffs

%% exits unless in right mode
\ifnum\pIIe@mode<\@ne
  \endinput\expandafter\fi

%% 
\ifcase\pIIe@mode\relax
  \or
  \def\bxpz@setdash@op{setdash}
  \or
  \def\bxpz@setdash@op{d}
\fi
\def\bxpz@beginarray@op{[}
\def\bxpz@endarray@op{]}

%%------ Poly-line commands

%% \bxpz@asdraw / \bxpz@asjoin / \bxpz@asmode
\def\bxpz@asdraw{\chardef\bxpz@lm@invoke\z@}
\def\bxpz@asjoin{\chardef\bxpz@lm@invoke\@ne}
\def\bxpz@asmode{\chardef\bxpz@lm@invoke\tw@}

%%<*> \drawline/\dottedline/\dashline
% \dottedline[CHAR]{DOTGAP}(X1,Y1)...(XN,YN)
% \dashline[STRETCH]{DASHLEN}[DOTGAP](X1,Y1)...(XN,YN)
%   * DOTGAP is ignored
% \drawline[STRETCH](X1,Y1)...(XN,YN)
%   * switches to \dashline in case of negative STRETCH
\def\drawline{\bxpz@asdraw\bxpz@drawl@a}
\def\dottedline{\bxpz@asdraw\bxpz@dotl@a}
\def\dashline{\bxpz@asdraw\bxpz@dashl@a}
\def\bxpz@drawl@a{\@testopt\bxpz@drawl@b\drawlinestretch}
\def\bxpz@drawl@b[#1]{%
  \ifnum#1<\z@ \def\bxpz@nxt{\bxpz@path{\bxpz@dp@drawl@x{#1}}}%
  \else \let\bxpz@nxt\bxpz@drawl@c
  \fi \bxpz@nxt}
\def\bxpz@drawl@c{\bxpz@path{\bxpz@dp@drawl}}
\def\bxpz@dashl@a{\@testopt\bxpz@dashl@b\dashlinestretch}
\def\bxpz@dashl@b[#1]#2{\@testopt{\bxpz@dashl@c{#1}{#2}}{}}
\def\bxpz@dashl@c#1#2[#3]{\bxpz@path{\bxpz@dp@dashl{#1}{#2}}}
\def\bxpz@dotl@a{\@testopt\bxpz@dotl@b{}}
\def\bxpz@dotl@b[#1]#2{\bxpz@path{\bxpz@dp@dotl{#1}{#2}}}
%\def\path{\bxpz@asdraw\bxpz@path{}}
%% \bxpz@path{<dash-pattern>}
\def\bxpz@path#1{%
  #1\ifcase\bxpz@lm@invoke
    \expandafter\bxpz@polyline
    \or \expandafter\bxpz@join@start
    \or \expandafter\bxpz@dash@mode
  \fi}

%% \bxpz@polyline
% Same as \polyline in pict2e, except that \bxpz@stroke@graph is
% used instead of \pIIe@strokeGraph.
\def\bxpz@polyline(#1,#2){%
  \@killglue
  \pIIe@moveto{#1\unitlength}{#2\unitlength}%
  \@ifnextchar\lp@r{\bxpz@polyline@a}%
   {\ifnum\bxpz@lm@invoke=\z@ \bxpz@warn@wnpnt \fi \ignorespaces}}
\def\bxpz@polyline@a(#1,#2){%
  \pIIe@lineto{#1\unitlength}{#2\unitlength}%
  \@ifnextchar\lp@r{\bxpz@polyline@a}{\bxpz@stroke@graph\ignorespaces}}

%%<*> drawjoin / dottedjoin / dashjoin environment
% \begin{dottedjoin}[CHAR]{DOTGAP}...\end{dottedjoin}
% \begin{dashjoin}[STRETCH]{DASHLEN}[DOTGAP]...\end{dashjoin}
% \begin{drawjoin}[STRETCH]...\end{drawjoin}
\def\drawjoin{\bxpz@asjoin\bxpz@drawl@a}
\def\dottedjoin{\bxpz@asjoin\bxpz@dotl@a}
\def\dashjoin{\bxpz@asjoin\bxpz@dashl@a}
\def\bxpz@endjoin{\bxpz@join@end\aftergroup\bxpz@join@finale}
\let\enddrawjoin\bxpz@endjoin
\let\enddottedjoin\bxpz@endjoin
\let\enddashjoin\bxpz@endjoin

%%<*> \jput(X,Y){something}
\def\jput(#1,#2){%
  \ifbxpz@injoin
    \xdef\bxpz@g@join@last{(#1,#2)}%
    \xdef\bxpz@g@join@path{\bxpz@g@join@path\bxpz@g@join@last}%
  \fi \put(#1,#2)}
\let\bxpz@g@join@last\relax
\let\bxpz@g@join@path\@empty

%% \bxpz@join@start
\def\bxpz@join@start{%
  \bxpz@renew@join \let\bxpz@dp@join\bxpz@dp
  \edef\bxpz@wholewidth@join{\the\@wholewidth}%
  \bxpz@dp@clear \bxpz@injointrue \ignorespaces}

%% \bxpz@join@end
\def\bxpz@join@end{\bxpz@renew@join}

%% \bxpz@join@finale
\def\bxpz@join@finale{%
  \ifbxpz@injoin\else
    \global\let\bxpz@g@join@last\relax
    \global\let\bxpz@g@join@path\@empty
  \fi \ignorespaces}

%%<*> \flushjoin
\def\flushjoin{%
  \bxpz@flush@join \global\let\bxpz@g@join@last\relax}
%% \bxpz@renew@join
\def\bxpz@renew@join{%
  \bxpz@flush@join
  \ifx\bxpz@g@join@last\relax\else
    \global\let\bxpz@g@join@path\bxpz@g@join@last \fi}
\def\bxpz@flush@join{%
  \ifx\bxpz@g@join@path\@empty\else
    \bgroup \bxpz@asjoin
      \@wholewidth=\bxpz@wholewidth@join \let\bxpz@dp\bxpz@dp@join
      \expandafter\bxpz@polyline\bxpz@g@join@path
    \egroup \global\let\bxpz@g@join@path\@empty
  \fi}

%%<*> \drawlines / \dottedlines / \dashlines
\def\drawlines{\bxpz@asmode\bxpz@drawl@a}
\def\dottedlines{\bxpz@asmode\bxpz@dotl@a}
\def\dashlines{\bxpz@asmode\bxpz@dashl@a}

%% \bxpz@dash@mode
\def\bxpz@dash@mode{%
  \let\bxpz@dp@mode\bxpz@dp \bxpz@dp@clear \ignorespaces}

%%<*>\path(X1,Y1)..(Xn,Yn)
\def\path{\bxpz@asdraw \bxpz@polyline}

%%------ Dash-pattern generator

% A dash-pattern generator defines \bxpz@dp to be
% {<PS dash array>}{<dash flag>}
% where <dash flag> means: 0 = normal; 1 = ordinary dotted line,
% line-width adjustment is needed; 2 = character dotted line.

%% \bxpz@dp@drawl
\def\bxpz@dp@drawl{\let\bxpz@dp\bxpz@dp@drawl@val}
%% \bxpz@dp@dotl{<IGNORED>}{<dot-gap>}
\def\bxpz@dp@dotl#1#2{\bxpz@dp@start
  \bxpz@addto@dp@nums{\@wholewidth}{#2\unitlength}%
  \gdef\bxpz@g@dpflag{1}\bxpz@dp@end}
%% \bxpz@dp@drawl@x{<stretch>}
% For \drawline with negative stretch.
\def\bxpz@dp@drawl@x#1{\bxpz@dp@dashl@sub{%
  \@tempcnta=#1\relax\multiply\@tempcnta\tw@
  \@tempdima=\bxpz@dashlen@drawline}}
%% \bxpz@dp@dashl{<stretch>}{<dash-length>}
\def\bxpz@dp@dashl#1#2{\bxpz@dp@dashl@sub{%
  \@tempcnta=#1\relax\advance\@tempcnta-100 
  \@tempdima=#2\unitlength}}
% \bxpz@dp@dashl@sub
% Here dash gap length is calculated so that 'ink ratio' in resulted
% lines equals the value derived from the given stretch value.
% ink ratio:     (blank)0.0    0.5     1.0(solid)
% \drawline stretch:   -100 .. -50 ..    0
% \dashline stretch:   -100 ..   0 ..  100
\def\bxpz@dp@dashl@sub#1{\bxpz@dp@start
  #1% here \@tempcnta is adjusted in range -200..0
  \ifnum\@tempcnta<\z@
    \ifnum\@tempcnta>-200 %
      \@tempdimb=-\@tempcnta\@tempdima
      \advance\@tempcnta200 \divide\@tempdimb\@tempcnta
      \bxpz@addto@dp@nums{\@tempdima}{\@tempdimb}%
    \else % 'blank' lines
      \bxpz@warn@wnstr \bxpz@addto@dp@nums{\z@}{1000pt}%
    \fi
  \fi % if \@tempcnta >=0 then do nothing (solid lines)
  \bxpz@dp@end}
% some internal stuffs
\def\bxpz@dp@start{%
  \bgroup \global\let\bxpz@g@dp\@empty \gdef\bxpz@g@dpflag{0}}
\def\bxpz@dp@end{
  \egroup \edef\bxpz@dp{{\bxpz@g@dpflag}{\bxpz@g@dp}}}
\def\bxpz@dp@drawl@val{{}{0}}
\def\bxpz@addto@dp@nums#1#2{%
  \bgroup \@tempdima#1\relax \@tempdimb#2\relax
    \xdef\bxpz@g@dp{%
     \bxpz@g@dp\strip@pt\@tempdima\space\strip@pt\@tempdimb\space}%
  \egroup}
\def\bxpz@dp@clear{\let\bxpz@dp\relax}

%%------ Strokes with dash-pattern in effect

%% pict2e original \pIIe@strokeGraph
\def\bxpz@pIIe@strokeGraph{\begingroup \@tempswafalse\pIIe@drawGraph}

% \bxpz@stroke@graph
\def\bxpz@stroke@graph{\begingroup \bxpz@draw@graph}
\def\bxpz@draw@graph{%
  \ifx\bxpz@dp\relax \let\bxpz@dp\bxpz@dp@mode \fi
  \ifx\bxpz@dp\bxpz@dp@drawl@val \let\bxpz@setdash\@empty
  \else
    \ifbxpz@eepic@dotl \roundcap \fi
    \bxpz@set@dp\bxpz@dp
    \ifnum \bxpz@dpflag=\@ne \bxpz@adj@linewidth \fi
    \xdef\bxpz@setdash{\bxpz@beginarray@op\space\bxpz@dpary
      \bxpz@endarray@op\space\bxpz@setdash@phase\space
      \bxpz@setdash@op\space}%
  \fi
  \edef\x{\pIIe@debug@comment\space\pIIe@scale@PTtoBP}%
  \edef\x{\x\space\bxpz@setdash\strip@pt\@wholewidth\space
    \pIIe@setlinewidth@op}%
  \edef\y{\pIIe@stroke@op}%
  \expandafter\pIIe@code\expandafter{%
   \expandafter\x\the\pIIe@GRAPH\space\y}%
  \global\pIIe@GRAPH{}\xdef\pIIe@CPx{}\xdef\pIIe@CPy{}%
  \endgroup
  \let\bxpz@dp\relax}

%% \bxpz@set@dp\DP
\def\bxpz@set@dp#1{\expandafter\bxpz@set@dp@a#1}
\def\bxpz@set@dp@a#1#2{%
  \def\bxpz@dpary{#2}\def\bxpz@dpflag{#1}}

\def\bxpz@adj@linewidth{%
  \ifdim\@wholewidth<0.2pt \@wholewidth=2\@wholewidth
  \else\ifdim\@wholewidth<1pt
    \@wholewidth=0.75\@wholewidth \advance\@wholewidth0.25pt
  \fi\fi}

%%------ Circles & ovals

% pict2e's original \@arc command
\let\bxpz@pIIe@arc\@arc

%% \@arc{<diam>}{<s_angle>}{<e_angle>}
% If the arguments obey the format shown above then passes them
% to \bxpz@eepic@arc; otherwise passes them to \bxpz@pIIe@arc.
\def\@arc{\@ifnextchar[{\@arc}{\bxpz@arc@a}}
\def\bxpz@arc@a#1{%
  \def\bxpz@argi{#1}\futurelet\bxpz@tok\bxpz@arc@b}
\def\bxpz@arc@b{%
  \ifx\bxpz@tok\bgroup \expandafter\bxpz@arc@c
  \else \bxpz@pIIe@arc\bxpz@argi \fi}
\def\bxpz@arc@c#1{%
  \def\bxpz@doargii{\bxpz@do{#1}}\futurelet\bxpz@tok\bxpz@arc@d}
\def\bxpz@arc@d{%
  \ifx\bxpz@tok\bgroup \expandafter\bxpz@arc@f
  \else \expandafter\bxpz@arc@e \fi}
\def\bxpz@arc@e{%
  \bxpz@pIIe@arc\bxpz@argi \let\bxpz@do\@empty\bxpz@doargii}
\def\bxpz@arc@f{%
  \def\bxpz@do##1{\bxpz@eepic@arc\bxpz@argi{##1}}\bxpz@doargii}

%% \bxpz@eepic@arc{<diam>}{<s_angle>}{<e_angle>}
\def\bxpz@eepic@arc#1#2#3{%
  \bgroup
    \@tempdima=#2\p@ \@tempdimb=#3\p@ \bxpz@conv@arc@param
    \@tempdimc=#1\unitlength \divide\@tempdimc\tw@
    \xdef\bxpz@g@tmpa{%
      {\the\@tempdimc}{\strip@pt\@tempdima}{\strip@pt\@tempdimb}}%
  \egroup
  \if@tempswa
    \def\bxpz@do{\pIIe@arc{\z@}{\z@}}%
    \pIIe@moveto\z@\z@ \expandafter\bxpz@do\bxpz@g@tmpa
    \pIIe@closepath\pIIe@fillGraph
  \else
    \def\bxpz@do{\pIIe@arc[1]{\z@}{\z@}}%
    \expandafter\bxpz@do\bxpz@g@tmpa \pIIe@strokeGraph
  \fi}

%% \bxpz@conv@arc@param
% Converts tpic degree arguments (s, e) to pict2e ones (S, E); values
% of (\@tempdima, \@tempdimb) are changed from (s, e) to (S, E).
% Let (S', E') = -(180/pi)(s, e); then:
% * if e - s >= 2pi (ie. S' - 360 >= E') then (S, E) = (0, 360)
%   so that a whole circle is drawn;
% * otherwise, adjust S' and E' to values in range [0, 360), and then
%   if S' < E' then decrement E' by 360, since in tpic an arc is
%   always drawn in clockwise direction and thus S' >= E' must hold.
% Note: After scaling by 180/pi, degree values are rounded to multiples
% of 2^(-10). This rounding eliminates errors in the case of 'common
% angles' such as 15deg, while generally it enlarges the maximum possible
% error by factor about two.
\def\bxpz@conv@arc@param{%
%\typeout{BEFORE:\the\@tempdima/\the\@tempdimb}%
  \bxpz@conv@arc@param@a\@tempdima \bxpz@conv@arc@param@a\@tempdimb
  \@tempdimc\@tempdima \dimen@360\p@ \advance\@tempdimc-\dimen@
  \ifdim \@tempdimb>\@tempdimc
    \bxpz@conv@arc@param@b\@tempdima \bxpz@conv@arc@param@b\@tempdimb
    \ifdim \@tempdima<\@tempdimb \advance\@tempdimb-\dimen@ \fi
  \else \@tempdima\z@ \@tempdimb\dimen@ \fi
%\typeout{AFTER : \the\@tempdima/\the\@tempdimb}%
}
\def\bxpz@conv@arc@param@a#1{%
  #1=57.29577951#1\advance#132sp \divide#164\multiply#1-64\relax}
\def\bxpz@conv@arc@param@b#1{%
  \@whiledim#1>\z@ \do{\advance#1-\dimen@}%
  \@whiledim#1<\z@ \do{\advance#1\dimen@}}%

%%<*> \ellipse[*]{<x_diam>}{<y_diam>}
\def\ellipse{%
  \@ifstar{\begingroup\@tempswatrue\bxpz@ellipse}%
   {\begingroup\@tempswafalse\bxpz@ellipse}}
\def\bxpz@ellipse#1#2{%
    \@tempdima=#1\unitlength\@tempdimb=#2\unitlength
    \ifdim\@tempdima<\z@ \@tempdima\z@ \fi
    \ifdim\@tempdimb<\z@ \@tempdimb\z@ \fi
    \divide\@tempdima\tw@ \divide\@tempdimb\tw@
    \bxpz@ellipse@a
    \if@tempswa \pIIe@fillGraph \else \pIIe@strokeGraph \fi
  \endgroup}
\def\bxpz@ellipse@a{%
  \buttcap \@ovxx\@tempdima \@ovyy\@tempdimb
  \@ovdx=0.55228475\@ovxx \@ovdy=0.55228475\@ovyy
  \pIIe@moveto\@ovxx\z@
  \pIIe@curveto\@ovxx\@ovdy\@ovdx\@ovyy\z@\@ovyy
  \pIIe@curveto{-\@ovdx}\@ovyy{-\@ovxx}\@ovdy{-\@ovxx}\z@
  \pIIe@curveto{-\@ovxx}{-\@ovdy}{-\@ovdx}{-\@ovyy}\z@{-\@ovyy}%
  \pIIe@curveto\@ovdx{-\@ovyy}\@ovxx{-\@ovdy}\@ovxx\z@
  \pIIe@closepath}


%%------ Chaikin spline curves

%%<*> \spline
% Same as \polyline in pict2e, except that \bxpz@stroke@graph is
% used instead of \pIIe@strokeGraph.
\def\spline{\bxpz@firsttrue\bxpz@spline@a}
\def\bxpz@spline@a(#1,#2){%
  \@killglue \@xdim=#1\unitlength \@ydim=#2\unitlength
  \pIIe@moveto\@xdim\@ydim
  \@ifnextchar\lp@r{\bxpz@spline@b}%
   {\ifnum \bxpz@warn@wnpnt \ignorespaces}}
\def\bxpz@spline@b(#1,#2){%
  % M1:previous midpoint   (\@ovdx,\@ovdy)
  % P1:previous point      (\@xdim,\@ydim)
  % M2:current midpoint    (\@ovxx,\@ovyy)
  % P2:current point       (\@tempdima,\@tempdimb)
  \@tempdima=#1\unitlength\@tempdimb=#2\unitlength
  \@ovxx\@tempdima \advance\@ovxx\@xdim \divide\@ovxx\tw@
  \@ovyy\@tempdimb \advance\@ovyy\@ydim \divide\@ovyy\tw@
  \ifbxpz@first
    \pIIe@lineto\@ovxx\@ovyy \bxpz@firstfalse
  \else\bgroup
    % quadratic Bezier curve M1--P1--M2
    \pIIe@bezier@QtoC\@ovdx\@xdim\@ovdx
    \pIIe@bezier@QtoC\@ovdy\@ydim\@ovdy
    \pIIe@bezier@QtoC\@ovxx\@xdim\@xdim
    \pIIe@bezier@QtoC\@ovyy\@ydim\@ydim
    \pIIe@curveto\@ovdx\@ovdy\@xdim\@ydim\@ovxx\@ovyy
  \egroup\fi
  \@ovdx\@ovxx \@ovdy\@ovyy
  \@xdim\@tempdima \@ydim\@tempdimb
  \@ifnextchar\lp@r{\bxpz@spline@b}{\bxpz@spline@c}}
\def\bxpz@spline@c{%
  \pIIe@lineto\@xdim\@ydim
  \bxpz@stroke@graph\ignorespaces}


%%------ Functions not dependent on special features

%%<*> \allinesthickness
% In pict2e \linethickness setting applies to all kinds of lines.
% For better compatibility with eepic, \allinesthickness changes
% (without much aim) the LaTeX "line fonts".
\def\allinethickness{\bxpz@thicklinefont \linethickness}
\def\bxpz@thicklinefont{\let\@linefnt\tenlnw\let\@circlefnt\tencircw}

%%<*> \Thicklines
% Sets line-width to 1.5 times the width of \thicklines.
\def\Thicklines{\bxpz@thicklinefont \@wholewidth\fontdimen8\tenlnw
  \linethickness{1.5\@wholewidth}}

%%<*> \picsquare
% Not of much use.
\def\picsquare{%
  \hskip-\@halfwidth
  \vrule\@width\@wholewidth\@height\@halfwidth\@depth\@halfwidth\relax}

%%<*> \multiputlist
% \multiputlist(X,Y)(DX,DY)[tbrl]{ITEM,...}
\def\multiputlist(#1,#2)(#3,#4){%
  \@xdim=#1\unitlength \@ydim=#2\unitlength \@killglue
  \@ifnextchar[{\bxpz@multiputlist@a{#3}{#4}}%
    {\bxpz@multiputlist@a{#3}{#4}[]}}
\def\bxpz@multiputlist@a#1#2[#3]#4{%
  \@for\bxpz@x:={#4}\do{%
    \raise\@ydim\hb@xt@\z@{\kern\@xdim
      \@imakepicbox(0,0)[#3]\bxpz@x \hss}%
    \advance\@xdim#1\unitlength \advance\@ydim#2\unitlength}%
  \ignorespaces}

%%<*> \matrixput
% \matrixput(X,Y)(DX1,DY1){N1}(DX2,DY2){N2}{ITEM}
\def\matrixput(#1,#2)(#3,#4)#5(#6,#7)#8#9{%
  \bgroup \@xdim\z@ \@ydim\z@
    \setbox\bxpz@boxa\hbox{%
      \@multicnt=#8\relax
      \@whilenum\@multicnt>\z@\do{%
        \raise\@ydim\hb@xt@\z@{\kern\@xdim #9\hss}%
        \advance\@xdim#6\unitlength \advance\@ydim#7\unitlength
        \advance\@multicnt\m@ne}}%
    \@xdim=#1\unitlength \@ydim=#2\unitlength \@killglue
    \@multicnt=#5\relax
    \@whilenum\@multicnt>\z@\do{%
      \raise\@ydim\hb@xt@\z@{\kern\@xdim \copy\bxpz@boxa\hss}%
      \advance\@xdim#3\unitlength \advance\@ydim#4\unitlength
      \advance\@multicnt\m@ne}%
  \egroup \ignorespaces}

%%<*> \grid
% \grid(W,H)(DW,DH)[X0,Y0]
\def\grid(#1,#2)(#3,#4){%
  \@ovxx=#1\unitlength \@ovyy=#2\unitlength 
  \edef\bxpz@gridx{#3}\edef\bxpz@gridy{#4}%
  \@ifnextchar[{\bxpz@grid@a}{\bxpz@grid@a[,]}}
\def\bxpz@grid@a[#1,#2]{%
  \@killglue \let\spacewidth\@ovri
  \setbox\bxpz@boxa\hbox{\space}\@ovri=\wd\bxpz@boxa
  \@tempdimc=\z@ \@ovdx=\bxpz@gridx\unitlength
  \ifx @#1@\bxpz@uselblfalse
  \else \@tempdima=#1\p@ \bxpz@uselbltrue \fi
  \@tempdimb\@ovxx \advance\@tempdimb.5\@ovdx \divide\@tempdimb\@ovdx
  \@tempcnta\@tempdimb \advance\@tempcnta\@ne
  \@whilenum\@tempcnta>\z@ \do{%
    \hb@xt@\z@{\kern\@tempdimc \kern-\@halfwidth
      \vrule\@height\@ovyy\@width\@wholewidth \hss}%
    \ifbxpz@uselbl \bxpz@makelbl
      \setbox\bxpz@boxa\hb@xt@\z@{\hss\copy\bxpz@boxa\hss}%
      \hb@xt@\z@{\kern\@tempdimc
        \vtop{\kern\epicbottomgridlabelsep\copy\bxpz@boxa}\hss}%
      \raise\@ovyy\hb@xt@\z@{\kern\@tempdimc
        \vbox{\copy\bxpz@boxa\kern\epictopgridlabelsep}\hss}%
    \fi
    \advance\@tempdima\bxpz@gridx\p@ \advance\@tempdimc\@ovdx
    \advance\@tempcnta\m@ne}%
  \@tempdimc=\z@ \@ovdy=\bxpz@gridy\unitlength 
  \ifx @#2@\bxpz@uselblfalse
  \else \@tempdima=#2\p@ \bxpz@uselbltrue \fi
  \@tempdimb\@ovyy \advance\@tempdimb.5\@ovdy \divide\@tempdimb\@ovdy
  \@tempcnta\@tempdimb \advance\@tempcnta\@ne
  \@whilenum\@tempcnta>\z@ \do{%
    \raise\@tempdimc\hb@xt@\z@{%
      \vrule\@height\@halfwidth\@depth\@halfwidth\@width\@ovxx \hss}%
    \ifbxpz@uselbl \bxpz@makelbl
      \setbox\bxpz@boxa\vbox to\z@{\vss\copy\bxpz@boxa\vss}%
      \raise\@tempdimc\hb@xt@\z@{%
        \hss\copy\bxpz@boxa\kern\epicsidegridlabelsep}%
      \raise\@tempdimc\hb@xt@\z@{\kern\@ovxx
        \kern\epicsidegridlabelsep\copy\bxpz@boxa\hss}%
    \fi
    \advance\@tempdima\bxpz@gridy\p@ \advance\@tempdimc\@ovdy
    \advance\@tempcnta\m@ne}%
  \let\spacewidth\@undefined
  \ignorespaces}
\def\bxpz@makelbl{%
  \edef\bxpz@tmpa{\noexpand\bxGridLabelForm{\strip@pt\@tempdima}}%
  \setbox\bxpz@boxa\hbox{\bxpz@tmpa}}

%<+> \bxGridLabelForm{<real>}
% It must output the formatted string for value <real>. which is
% given as numerals (e.g. 72 or 10.333333).
% The default implementation uses decimal strings of the value
% rounded to integers.
\def\bxGridLabelForm#1{\@tempdima#1\p@ \advance\@tempdima.5\p@
  \expandafter\bxpz@gridlabelform@a\the\@tempdima\@nil}
\def\bxpz@gridlabelform@a#1.#2\@nil{#1}

%%<*> \putfile{<filename>}{<general_text>}
\def\putfile#1#2{%
  \def\bxpz@body{#2}%
  \let\bxpz@dofile\bxpz@putfile@a \let\bxpz@dofile@skipped\relax
  \bxpz@dofile@ifexists{#1}}
\let\bxpz@fhread\@inputcheck
\def\bxpz@putfile@a#1{%
  \openin\bxpz@fhread=#1\relax \let\bxpz@tmpa\relax
  \ifeof\bxpz@fhread\else \expandafter\bxpz@putfile@b \fi
  \closein\bxpz@fhread \ignorespaces}
\def\bxpz@putfile@b{%
  \read\bxpz@fhread to\bxpz@line
  \ifx\bxpz@line\bxpz@line@par \let\bxpz@line\@empty \fi
  \edef\bxpz@line{\bxpz@line\space\space}%
  \expandafter\bxpz@putfile@c\bxpz@line
  \ifeof\bxpz@fhread\else \expandafter\bxpz@putfile@b \fi}
\def\bxpz@putfile@c#1 {%
  \ifx @#1@\relax \else
    \ifx\bxpz@tmpa\relax \def\bxpz@tmpa{#1}%
    \else \put(\bxpz@tmpa,#1){\bxpz@body}
          \let\bxpz@tmpa\relax
    \fi \expandafter\bxpz@putfile@c
  \fi}
\def\bxpz@line@par{\par}

%% \bxpz@dofile@ifexists
\newif\ifbxpz@dofile@ok
\def\bxpz@InputIfFileExists#1#2{%
  \IfFileExists{#1}{\bxpz@dofile@ifex@a\bxpz@dofile{#1}}}
\let\bxpz@ltx@InputIfFileExists\InputIfFileExists
\def\bxpz@dofile@ifexists#1{%
  \let\InputIfFileExists\bxpz@InputIfFileExists
  \bxpz@dofile@okfalse \@iinput{#1}%
  \ifbxpz@dofile@ok\else
    \bxpz@dofile@ifex@a \bxpz@dofile@skipped \fi}
\def\bxpz@dofile@ifex@a{\bxpz@dofile@oktrue
  \let\InputIfFileExists\bxpz@ltx@InputIfFileExists}

%%------
\ifbxpz@safe        %----<*safe>

%%<*> \[no]eepicdottedlines
% No-op in safe mode.
\let\eepicdottedlines\relax
\let\noeepicdottedlines\relax

\else               %----<*!safe>

%%<*> \[no]eepicdottedlines
\let\eepicdottedlines\bxpz@eepic@dotltrue
\let\noeepicdottedlines\bxpz@eepic@dotlfalse

%% \bxpz@redefine@linestyle\LSCMD{<attr>}{<val>}
\def\bxpz@redefine@linestyle#1#2#3{%
  \expandafter\bxpz@redefine@linestyle@a
   \csname bxpz@raw@\expandafter\@gobble\string#1\expandafter\endcsname
   \csname bxpz@#2\expandafter\endcsname
   \csname bxpz@LS/#2/#3\expandafter\endcsname
   \csname bxpz@SLS/#2\endcsname #1{#2}{#3}}
\def\bxpz@redefine@linestyle@a#1#2#3#4#5#6#7{%
  % \[bxpz@raw@LSCMD]\[bxpz@<attr>]\[bxpz@LS/<attr>/<val>]
  % \[bxpz@SLS/<attr>]\LSCMD{<attr>}{<val>}
  \let#1#5\let#3#5\def#5{\def#2{#7}#3\aftergroup#4}%
  \def#4{\csname bxpz@LS/#6/#2\endcsname}}
% redefine linestyle commands
\bxpz@redefine@linestyle\buttcap{lcap}{0}
\bxpz@redefine@linestyle\roundcap{lcap}{1}
\bxpz@redefine@linestyle\squarecap{lcap}{2}
\bxpz@redefine@linestyle\miterjoin{ljoin}{0}
\bxpz@redefine@linestyle\roundjoin{ljoin}{1}
\bxpz@redefine@linestyle\beveljoin{ljoin}{2}

% default values of states
\let\bxpz@lcap\bxpz@dflt@linecap
\let\bxpz@ljoin\bxpz@dflt@linejoin

%% patch to \pIIe@circle
% \buttcap moved one-level outside.
\def\pIIe@circle#1{%
  \buttcap
  \begingroup
  \pIIe@qcircle[1]\z@{#1}\pIIe@qcircle  \@ne{#1}%
  \pIIe@qcircle  \tw@{#1}\pIIe@qcircle\thr@@{#1}%
  \endgroup}


\fi                 %----</safe>
\endinput
%%------
%
% List of epic features not contained in pict2e
%
%\multiputlist(X,Y)(DX,DY)[tbrl]{ITEM,...}
%\matrixput(X,Y)(DX1,DY1){N1}(DX2,DY2){N2}{ITEM}
%\grid(W,H)(DW,DH)[X0,Y0]
%\dottedline[CHAR]{DOTGAP}(X1,Y1)...(XN,YN)
%\dashline[STRETCH]{DASHLEN}[DOTGAP](X1,Y1)...(XN,YN)
%\drawline[STRETCH](X1,Y1)...(XN,YN)
%\jput(X,Y){ITEM}
%\begin{dottedjoin}[C]{G} ... \end{dottedjoin}
%\begin{dashjoin}[S]{D}[G] ... \end{dashjoin}
%\begin{drawjoin}[S] ... \end{drawjoin}
%\picsquare
%\putfile{FILE}
%\dashlinestretch
%\drawlinestretch
%
% List of eepic features not contained in pict2e
%
%\maxovaldimen (for \oval)
%\allinethickness
%\Thicklines
%\path(X1,Y1)..(Xn,Yn)
%\spline(X1,Y1)..(Xn,Yn)
%\ellipse[*]{XDIAM}{YDIAM}
%\arc{DIAM}{SANG}{EANG}    *angle in radian, +ve = clockwise
%\filltype{FILL} / \blacken / \whiten / \shade
%
%% EOF