\documentclass{ltxguide}
\usepackage{times,url}
\usepackage[shell]{pdftricks}

\begin{psinputs}
\usepackage{pstricks}
\usepackage{color}
\usepackage{pstcol}
\usepackage{pst-plot}
\usepackage{pst-tree}
\usepackage{pst-eps}
\usepackage{multido}
\usepackage{pst-node}
\usepackage{pst-eps}
\end{psinputs}

% 1. run pdfLaTeX
% 2. run script `psrun' by invoking ./psrun
% 3. second run of pdfLaTeX

\begin{document}

\NoProcess[1,3]


\title{Trivial Experiments with psTricks manipulation}

\author{\bfseries Radhakrishnan CV and Rajagopal
           CV\\[-3pt]
       \small River Valley Technologies,
                       Trivandrum, India\\[-3pt]
       \small\url{http://www.river-valley.com}\\[6pt]
       \bfseries Antoine Chambert-Loir\\[-3pt]
       \small Ecole polytechnique, Palaiseau Cedex,
                       France\\[-3pt]
       \small \url{http://www.math.polytechnique.fr/~chambert}
}

\maketitle

\section{Objectives}
|psTricks| macros cannot be used with pdf\TeX, since the high level
PostScript language commands generated by the |psTricks| are unknown to
pdf\TeX. As such, a package \emph{viz.}, |pdfTricks.sty| has been
written to circumvent this limitation, so that the extensive facilities
offered by the powerful |psTricks| package can be made use of in a
pdf\TeX{} document. This is brought by making use of the shell escape
function available in the |web2c| \TeX{} compiler, while this package
is of no use to other commercial implementations.

Shell escape provides us the facility of stopping a \TeX{} run 
midway, perform the functions that we do with a shell command, complete
those functions, return to the \TeX{} run and finish the job. Within a
package, this facility can be invoked by using
|\write18{shell command}|. So if you use a line:
\begin{decl}
|write18 ls -l|
\end{decl}
\TeX{} will stop at the moment when it encounter the |\write18|
command, escapes to shell, executes |ls -l| command and return to the
compilation process.

\section{Shell escape}

In all the web2c \TeX{} implementations, shell escape is turned off by
default. You can either turn it on by changing the line in your
|texmf.cnf| (configuration file of your \TeX{} system) to:
\begin{decl}
|shell_escape = t|
\end{decl}
which will be `|f|' by default. You have to recreate all the formats
like |pdflatex.fmt| or whatever you might need. This is not a wise step
though, since it makes you open to the assault of Trojan macros without
your knowledge.

The more elegant way will be to invoke shell escape with a switch, each
time you run the compiler like:
\begin{decl}
|pdflatex -shell-escape <file name>|
\end{decl}
This eliminates the vulnerability to macros/packages written by
intelligent criminal minds. 

\section{Usage}
The usage is very simple, as usual you have to load the package with a
package loading line in the preamble of your document:

\begin{decl}
|\usepackage{pdftricks}|
\end{decl}

All the packages that are needed for the compilation of the
|pstricks| code shall be enclosed within an environment
|\begin{psinputs}| \dots |\end{psinputs}| in order to make it
available to all the figure documents during compilation. An
example of this will look like
\begin{decl}
|\begin{psinputs}|\\
| \usepackage{pstricks}|\\
| \usepackage{color}   |\\
| \usepackage{pstcol}  |\\
| \usepackage{pst-plot}|\\
| \usepackage{pst-tree}|\\
| \usepackage{pst-eps} |\\
| \usepackage{multido} |\\
| \usepackage{pst-node}|\\
| \usepackage{pst-eps} |\\
| ... |\\
|\end{psinputs}|
\end{decl}

Each |pspicture| environment along with any macro code shall be
enclosed within an environment \emph{viz.}, |pdfpic|. This will
enable pdf\LaTeX{} to write external files like |fig1.tex|,
|fig2.tex|, \dots, depending on the number of |psTricks| figures
you have included in your document. |pdftricks| will
intelligently find out whether your pdf\TeX{} implementation has
shell escape facility enabled or not. Depending on this, there
are two ways of approaching the problem which are given in the
succeeding sections.

\subsection{With shell escape}

With shell escape option invoked, one need not bother anything.
The usual compilation with pdf\LaTeX{} will result in a |pdf|
document with all the figures appearing in the correct
positions. pdf\TeX{} will do the necessary job of writing all
the |pstricks| code to self standing external |*.tex| documents,
escapes to shell, compiles the |*.tex| document, converts to
|*.eps|, translates to |*.pdf| and includes in the location
where the |pstricks| code appeared.

\subsection{Without shell escape}

A special shell script viz., |pst2pdf| is also provided. Now as
the second step, you have to execute this shell script,
|pst2pdf| which will compile all the newly written
|fig1.tex|,\dots, and respective |*.dvi| will be generated,
which will be translated into respective |*.eps| files and
finally translated to |*.pdf| by calling |epstopdf|. As a final
step, you shall run pdf\LaTeX{} again, so that the |*.pdf|
figures will be included with the usual |\includegraphics|
command automatically in the locations wherever the |pstricks|
code appeared.


See an example below:
\begin{verbatim}
\begin{pdfpic}
\definecolor{lightblue}{rgb}{0,0,.5}
\definecolor{Navy}{rgb}{0,0,0.5}
\definecolor{LemonChiffon}{rgb}{1,0.98,0.8}
\definecolor{ForestGreen}{rgb}{0.13,0.55,0.13}
\SpecialCoor
\begin{pspicture}(-6,-6)(6,6)
  \psaxes{<<->>}(0,0)(-6,-6)(6,6)
  \psset{arrows=->>}
  \multido{\ia=-5+1}{11}{%
\multido{\ib=-5+1}{11}{%
 \pstVerb{/x \ia\space def
    /y \ib\space def      
    y 0 eq                
      {/ValueTempA 0 def  
       /ValueTempB 0.5 def}
      {/ValueTempZ 2 1 x x mul y y mul div add sqrt mul def
       /ValueTempA 1 ValueTempZ div def        
       /ValueTempB x y ValueTempZ mul div def} 
      ifelse}                                  
 \psline(! x ValueTempA sub y ValueTempB sub)  
        (! x ValueTempA add y ValueTempB add)}}
\end{pspicture}
\end{pdfpic}
\end{verbatim}
This |psTricks| code will result in the following graphic:
\configure[pdfgraphic][color=red,
                       linecolor=gray30]
\begin{pdfpic} 
\definecolor{lightblue}{rgb}{0,0,.5}
\definecolor{Navy}{rgb}{0,0,0.5}
\definecolor{LemonChiffon}{rgb}{1,0.98,0.8}
\definecolor{ForestGreen}{rgb}{0.13,0.55,0.13}
\def\transl#1#2{#1\space 72 2.54 div mul #2\space 72 2.54 div
     mul translate  0 0 moveto }
\newif\ifnotbothz
 \pspicture(-6,-6)(6,6)
 \psaxes{<->}(0,0)(-6,-6)(6,6)
 \multido{\n=-5+1}{11}{%
 \multido{\N=-5+1}{11}{%
 \notbothztrue%
 \ifnum\N=0 %
 \ifnum\n=0 \notbothzfalse\fi%
 \fi%
 \ifnotbothz%
 \psdot(0,0)%
 \pstverb{\transl{\n}{\N}\space
 \n\space neg \N\space
    atan rotate -9 0 moveto 18 0 rlineto stroke }
\fi}}
\endpspicture                      
\end{pdfpic}

The following are the steps in the sequential order:
\begin{decl}
1.~|latex <your document>|\\
2.~|pst2pdf|\\
3.~|latex <your document>|
\end{decl}

\section{Options and Hooks}

\begin{description}

\item[|shell|] This option will invoke the shell escape
functions.

\item[|noshell|] This option will suppress the shell escape
functions and will assume that there is no shell escape
facility.

\item[|NoProcess|] A new command |\NoProcess| has been introduced in this version
to facilitate the suppressing of pdf generation of those figures
whose pdf's are already available. This might prove helpful when
you have more figures to process and many of them are perfected
and don't need recompilation and translation everytime you run
pdf\LaTeX. The usage is:
\begin{decl}
|\NoProcess{<comma separated and/or hyphen separated ranges>}|
\end{decl}
If you have ten figures and if you want to suppress the
processing of the figure numbers 1, 2, 4 to 8 you can issue the
command at the top of the document as:
\begin{decl}
|\NoProcess{1,2,4-8}|
\end{decl}
\end{description}

\noindent There are few hooks to resize the graphic thus translated and
included.
\begin{decl}
|\configure[pdfgraphic][width=2in]|\\
|\configure[pdfgraphic][height=3in]|\\
|\configure[pdfgraphic][width=2in,height=3in]|
\end{decl}
the functionality is same as the |width| and |height| options as in the
|\includegraphics| command. But the graphic will be restricted to
aspect ratio.

\section{Limitations/Dependencies}
\begin{itemize}
\item Usage is limited to |web2c| \TeX{} implementations.
\item The shell escape commands used in this package are typical
\textsc{Unix} commands and as such it best works in \textsc{Linux/Unix}
flavours.
\item The package needs, |graphicx| and |keyval| packages; |epstopdf|,
the Perl script that translates |eps| files into |pdf|.
\end{itemize}

\section{Licence}
The package is distributed under \textsc{gnu} General Public Licence.

\section{Examples}
Here are some examples of pstricks code and the figures generated by
pdf\LaTeX.
\subsection{Example 1}
\begin{verbatim}
\configure[pdfgraphic][width=2in,linecolor=red,background=gray10]
\begin{pdfpic}
\definecolor{lightblue}{rgb}{0,0,.5}
\definecolor{Navy}{rgb}{0,0,0.5}
\definecolor{LemonChiffon}{rgb}{1,0.98,0.8}
\definecolor{ForestGreen}{rgb}{0.13,0.55,0.13}
\SpecialCoor
\begin{pspicture}(-6,-6)(6,6)
  \psaxes{<<->>}(0,0)(-6,-6)(6,6)
  \psset{arrows=->>}
  \multido{\ia=-5+1}{11}{%
\multido{\ib=-5+1}{11}{%
 \pstVerb{/x \ia\space def
    /y \ib\space def
    y 0 eq
      {/ValueTempA 0 def
       /ValueTempB 0.5 def}
      {/ValueTempZ 2 1 x x mul y y mul div add sqrt mul def
       /ValueTempA 1 ValueTempZ div def
       /ValueTempB x y ValueTempZ mul div def}
      ifelse}
 \psline(! x ValueTempA sub y ValueTempB sub)
        (! x ValueTempA add y ValueTempB add)}}
\end{pspicture}
\end{pdfpic}
\end{verbatim}
\configure[pdfgraphic][width=\linewidth,linecolor=red,background=gray10]
\begin{pdfpic}
\definecolor{lightblue}{rgb}{0,0,.5}
\definecolor{Navy}{rgb}{0,0,0.5}
\definecolor{LemonChiffon}{rgb}{1,0.98,0.8}
\definecolor{ForestGreen}{rgb}{0.13,0.55,0.13}
\SpecialCoor
\begin{pspicture}(-6,-6)(6,6)
  \psaxes{<->}(0,0)(-6,-6)(6,6)
  \psset{arrows=->}
  \multido{\ia=-5+1}{11}{%
\multido{\ib=-5+1}{11}{%
 \pstVerb{/x \ia\space def
    /y \ib\space def
    y 0 eq
      {/ValueTempA 0 def
       /ValueTempB 0.5 def}
      {/ValueTempZ 2 1 x x mul y y mul div add sqrt mul def
       /ValueTempA 1 ValueTempZ div def
       /ValueTempB x y ValueTempZ mul div def}
      ifelse}
 \psline(! x ValueTempA sub y ValueTempB sub)
        (! x ValueTempA add y ValueTempB add)}}
\end{pspicture}
\end{pdfpic}

\subsection{Example 2}
\begin{verbatim}
\configure[pdfgraphic][linecolor=blue,background=gray10,width=4in]
\begin{pdfpic}
\definecolor{lightblue}{rgb}{0,0,.5}
\definecolor{Navy}{rgb}{0,0,0.5}
\definecolor{LemonChiffon}{rgb}{1,0.98,0.8}
\definecolor{ForestGreen}{rgb}{0.13,0.55,0.13}
\newcommand{\MyNode}[2]{%
  \Tr{\psshadowbox[fillstyle=solid,fillcolor=#1]{\tiny #2}}}
\newcommand{\NoeudXt}[1]{\MyNode{ForestGreen}{#1}}
\newcommand{\NoeudMotif}[1]{\MyNode{Navy}{\textcolor{white}{#1}}}
\psset{armB=5mm,angleA=90,angleB=-90,levelsep=2cm,treesep=5mm}
\renewcommand{\psedge}[2]{\ncangle{#2}{#1}}
\TeXtoEPS
\begin{pspicture}(-8cm,-9.5cm)(8cm,1cm)
\rput(0,0){\LARGE\textcolor{red}{Set of Motif widgets classes}}
\rput(0,-4.8){%
  \psframebox[fillstyle=solid,fillcolor=LemonChiffon,linearc=5mm,
             cornersize=absolute]
    {\pstree{\NoeudXt{Core}}
    {\pstree{\NoeudMotif{Primitive}}
            {\pstree{\NoeudMotif{Label}}
                    {\TC*}
             \NoeudMotif{Scrollbar}
             \NoeudMotif{List}
             \NoeudMotif{Text}
             \NoeudMotif{ArrowButton}}
     \pstree{\NoeudXt{Composite}}
            {\pstree{\NoeudXt{Constraint}}
                    {\pstree{\NoeudMotif{Manager}}
                            {\TC*}}}
     \pstree{\NoeudXt{Shell}}
            {\pstree{\NoeudXt{OverrideShell}}
                    {\NoeudMotif{MenuShell}}
             \pstree{\NoeudXt{WMShell}}
                    {\pstree{\NoeudXt{VendorShell}}
                            {\TC*}}}}}}
\rput(-2,-10){%
  \psshadowbox[fillstyle=solid,fillcolor=ForestGreen]{Core} Xt Class}
\rput(2,-10){%
  \psshadowbox[fillstyle=solid,fillcolor=Navy]{%
     \textcolor{white}{List}} Motif Class}
\end{pspicture}
\endTeXtoEPS
\end{pdfpic}
\end{verbatim}
\configure[pdfgraphic][linecolor=blue,background=gray10,scale=.8]
\begin{pdfpic}
\definecolor{lightblue}{rgb}{0,0,.5}
\definecolor{Navy}{rgb}{0,0,0.5}
\definecolor{LemonChiffon}{rgb}{1,0.98,0.8}
\definecolor{ForestGreen}{rgb}{0.13,0.55,0.13}
\newcommand{\MyNode}[2]{%
  \Tr{\psshadowbox[fillstyle=solid,fillcolor=#1]{\tiny #2}}}
\newcommand{\NoeudXt}[1]{\MyNode{ForestGreen}{#1}}
\newcommand{\NoeudMotif}[1]{\MyNode{Navy}{\textcolor{white}{#1}}}
\psset{armB=5mm,angleA=90,angleB=-90,levelsep=2cm,treesep=5mm}
\renewcommand{\psedge}[2]{\ncangle{#2}{#1}}
\TeXtoEPS
\begin{pspicture}(-8cm,-9.5cm)(8cm,1cm)
\rput(0,0){\LARGE\textcolor{red}{Set of Motif widgets classes}}
\rput(0,-4.8){%
  \psframebox[fillstyle=solid,fillcolor=LemonChiffon,linearc=5mm,
             cornersize=absolute]
    {\pstree{\NoeudXt{Core}}
    {\pstree{\NoeudMotif{Primitive}}
            {\pstree{\NoeudMotif{Label}}
                    {\TC*}
             \NoeudMotif{Scrollbar}
             \NoeudMotif{List}
             \NoeudMotif{Text}
             \NoeudMotif{ArrowButton}}
     \pstree{\NoeudXt{Composite}}
            {\pstree{\NoeudXt{Constraint}}
                    {\pstree{\NoeudMotif{Manager}}
                            {\TC*}}}
     \pstree{\NoeudXt{Shell}}
            {\pstree{\NoeudXt{OverrideShell}}
                    {\NoeudMotif{MenuShell}}
             \pstree{\NoeudXt{WMShell}}
                    {\pstree{\NoeudXt{VendorShell}}
                            {\TC*}}}}}}
\rput(-2,-10){%
  \psshadowbox[fillstyle=solid,fillcolor=ForestGreen]{Core} Xt Class}
\rput(2,-10){%
  \psshadowbox[fillstyle=solid,fillcolor=Navy]{%
     \textcolor{white}{List}} Motif Class}
\end{pspicture}
\endTeXtoEPS
\end{pdfpic}

\subsection{Example 3}
\begin{verbatim}
\configure[pdfgraphic][linecolor=black,background=gray30]
\begin{pdfpic}
\TeXtoEPS
\definecolor{lightblue}{rgb}{0,0,.5}
\definecolor{Navy}{rgb}{0,0,0.5}
\definecolor{LemonChiffon}{rgb}{1,0.98,0.8}
\definecolor{ForestGreen}{rgb}{0.13,0.55,0.13}
\psset{unit=.825cm}
\begin{pspicture}(10,8)
  \psset{fillstyle=solid,linestyle=none,linewidth=0}
  \psframe[fillcolor=lightblue](10,8)
  \pscircle[fillcolor=yellow](2,6){.8} % Sun
  {% Rays
   \psset{linecolor=yellow,linestyle=solid,linewidth=.3}
   \degrees[8]
   \multido{\i=1+1}{8}{\rput{\i}(2,6){\psline(1,0)(1.5,0)}}
  }%
  \pspolygon[fillcolor=green](6,0)(10,2)(10,0)% Grass
  \psdiamond[fillcolor=red,gangle=-45](8,6)(1.5,2.5)% Kite
  \rput{45}(8,6){\pnode(-2.5,0){Kitetail}}
  \rput{-10}(.8,1.5){\psdiamond[fillcolor=yellow](.6,.1)(.6,.3)}
  \rput{-80}(.8,1.5){\psdiamond[fillcolor=yellow](.6,.1)(.6,.3)}
  \pnode(.8,1.5){Tailend}
  \nccurve[fillstyle=none,angleA=270,angleB=125,ncurvB=.9,ncurvA=1.4,
           linestyle=dotted,dotstyle=square,linewidth=.25]{Kitetail}{Tailend}
  \newcommand{\bunting}{\pstriangle(.35,.35)}
  \psset{fillcolor=red,labelsep=.01}
  \naput[nrot=115,npos=.15]{\bunting}
  \nbput[nrot=25,npos=.15]{\bunting}
  \naput[nrot=75,npos=.4]{\bunting}
  \nbput[nrot=115,npos=.4]{\bunting}
  \naput[nrot=115,npos=.7]{\bunting}
  \nbput[nrot=25,npos=.7]{\bunting}
\end{pspicture}
\endTeXtoEPS
\end{pdfpic}
\end{verbatim}

\configure[pdfgraphic][width=\linewidth,
                       linecolor=gray30,                  
                       background=gray10]
\begin{pdfpic}
\TeXtoEPS
\definecolor{lightblue}{rgb}{0,0,.5}
\definecolor{Navy}{rgb}{0,0,0.5}
\definecolor{LemonChiffon}{rgb}{1,0.98,0.8}
\definecolor{ForestGreen}{rgb}{0.13,0.55,0.13}
\psset{unit=.825cm}
\begin{pspicture}(10,8)
  \psset{fillstyle=solid,linestyle=none,linewidth=0}
  \psframe[fillcolor=lightblue](10,8)
  \pscircle[fillcolor=yellow](2,6){.8} % Sun
  {% Rays
   \psset{linecolor=yellow,linestyle=solid,linewidth=.3}
   \degrees[8]
   \multido{\i=1+1}{8}{\rput{\i}(2,6){\psline(1,0)(1.5,0)}}
  }%
  \pspolygon[fillcolor=green](6,0)(10,2)(10,0)% Grass
  \psdiamond[fillcolor=red,gangle=-45](8,6)(1.5,2.5)% Kite
  \rput{45}(8,6){\pnode(-2.5,0){Kitetail}}
  \rput{-10}(.8,1.5){\psdiamond[fillcolor=yellow](.6,.1)(.6,.3)}
  \rput{-80}(.8,1.5){\psdiamond[fillcolor=yellow](.6,.1)(.6,.3)}
  \pnode(.8,1.5){Tailend}
  \nccurve[fillstyle=none,angleA=270,angleB=125,ncurvB=.9,ncurvA=1.4,
           linestyle=dotted,dotstyle=square,linewidth=.25]{Kitetail}{Tailend}
  \newcommand{\bunting}{\pstriangle(.35,.35)}
  \psset{fillcolor=red,labelsep=.01}
  \naput[nrot=115,npos=.15]{\bunting}
  \nbput[nrot=25,npos=.15]{\bunting}
  \naput[nrot=75,npos=.4]{\bunting}
  \nbput[nrot=115,npos=.4]{\bunting}
  \naput[nrot=115,npos=.7]{\bunting}
  \nbput[nrot=25,npos=.7]{\bunting}
\end{pspicture}
\endTeXtoEPS
\end{pdfpic}

  
\end{document}
