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[pst-anamorphosis.git] / doc / possible_extensions.tex

\listfiles
\documentclass[a4paper,fleqn]{article}
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%\usepackage{mathptmx}
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\usepackage{multicol}
\usepackage{listings}
\usepackage[svgnames]{xcolor}
\usepackage{showexpl}
\usepackage[nomessages]{fp}
\usepackage{xspace}
\usepackage{pst-plot,pst-solides3d,pst-anamorphosis-add,pst-3d}
\usepackage{pst-grad}
\usepackage[absolute,notitlepage]{pst-abspos}
\usepackage{url}

\psset{path=C:/Dokumente und Einstellungen/Besitzer/Desktop/bergen/bergen/}
%\def\epsRoot{C:/Dokumente und Einstellungen/Besitzer/Desktop/bergen/bergen/}

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\renewcommand{\lstlistingname}{Source}
\renewcommand{\labelitemi}{$\bullet$}


\newcommand\cs[1]{\texttt{\char`\\#1}}
\newcommand\file[1]{\texttt{#1}}

\parindent0pt
\parskip5pt

\def\syracuseTitle{Les anamorphoses : extensions possibles}
%\def\syracuseGraphic{eiffel2}


\makeatletter
\def\psparametricplotA{\pst@object{parametricplotA}}%   hv 2008-11-22
\def\parametricplotA{\pst@object{parametricplotA}}
\def\parametricplotA@i#1#2{\@ifnextchar[{\parametricplotA@x{#1}{#2}}{\parametricplotA@x{#1}{#2}[]}}
\def\parametricplotA@x#1#2[#3]{\@ifnextchar[{\parametricplotA@xi{#1}{#2}[#3]}{\parametricplotA@xi{#1}{#2}[#3][]}}
\def\parametricplotA@xi#1#2[#3][#4]#5{%
  \pst@killglue%
  \begingroup%
    \use@par%
    \@nameuse{beginplot@\psplotstyle}%
    \addto@pscode{%
    \tx@optionsanamorphosis
    \tx@optionsanamorphosisAdd
      #3 %prefix PS code
      \psplot@init
      /t #1 def
      /t1 #2 def
      /dt t1 t sub \psk@plotpoints div def
      /F@pstplot \ifPst@algebraic (#5)
                    \ifx\psk@PlotDerivative\@none\else
                      \psk@PlotDerivative\space { (t) tx@Derive begin Derive end } repeat
                    \fi\space
                    tx@AlgToPs begin AlgToPs end cvx
                 \else { #5 } \fi  def
      \ifPst@VarStep
         /StillZero 0 def /LastNonZeroStep dt def
         /F2@pstplot tx@Derive begin (#5) (t) Derive (t) Derive end
                     \ifx\psk@PlotDerivative\@none\else
                       \psk@PlotDerivative\space { (t) tx@Derive begin Derive end } repeat
                     \fi\space
                    tx@AlgToPs begin AlgToPs end cvx def
         %% computation of the tolerance defined by plotpoints
         /epsilon12 \ifx\psk@VarStepEpsilon\@default
                       tx@Derive begin F2@pstplot end Pyth
                       dt 3 exp abs mul
                    \else\psk@VarStepEpsilon\space 12 mul \fi def
         /ComputeStep {
           dup 1e-4 lt
           { pop StillZero 2 ge { LastNonZeroStep 2 mul } { LastNonZeroStep } ifelse /StillZero StillZero 1 add def }
           { epsilon12 exch div 1 3 div exp /StillZero 0 def }
           ifelse } bind def
      \fi
      /xy {
        \ifPst@algebraic F@pstplot \else #5 \fi
        \pst@number\psyunit mul exch
        \pst@number\psxunit mul exch
        tx@anamorphosisPathDict begin Anamorphose end
      } def
      }%
    \gdef\psplot@init{}%
    \@pstfalse
    \@nameuse{testqp@\psplotstyle}%
    \if@pst\parametricplotA@ii{#4}\else\parametricplotA@iii{#4}\fi
  \endgroup%
  \ignorespaces}
%
\def\parametricplotA@ii#1{% para is the post code
  \ifPst@VarStep%
    \addto@pscode{%
      mark xy \@nameuse{beginqp@\psplotstyle}
      { F2@pstplot Pyth ComputeStep
        t 2 copy add dup t1 gt {pop t1} if /t exch def F2@pstplot Pyth ComputeStep
        /t 3 -1 roll def 2 copy gt { exch } if pop
        /t t 3 -1 roll add dup t1 gt {pop t1} if def
        xy \@nameuse{doqp@\psplotstyle}
        t t1 eq { exit } if } loop}%
  \else\pst@killglue%
    \addto@pscode{%
      /ps@Exit false def
      xy \@nameuse{beginqp@\psplotstyle}
      \psk@plotpoints 1 sub {
        /t t dt add def
        xy \@nameuse{doqp@\psplotstyle}
        ps@Exit { exit } if
      } repeat
      ps@Exit not {
        /t t1 def
        xy \@nameuse{doqp@\psplotstyle}
      } if
    }%
  \fi%
  \addto@pscode{ #1 }%
  \@nameuse{endqp@\psplotstyle}}
%
\def\parametricplotA@iii#1{%
  \ifPst@VarStep%
    \addto@pscode{%
      /n 2 def
      mark
      { xy n 2 roll F2@pstplot Pyth
        ComputeStep t 2 copy add dup t1 gt {pop t1} if
        /t exch def F2@pstplot Pyth ComputeStep
        /t 3 -1 roll def 2 copy gt { exch } if pop
        /t t 3 -1 roll dup /LastNonZeroStep exch def add dup t1 gt {pop t1} if def /n n 2 add def
        t t1 eq { exit } if } loop
      xy n 2 roll}%
  \else\pst@killglue%
    \addto@pscode{
      mark
      /n 2 def
      \psk@plotpoints {
        xy
        n 2 roll
        /n n 2 add def
        /t t dt add def
      } repeat
      /t t1 def
      xy
      n 2 roll}%
  \fi%
  \addto@pscode{ #1 }%
  \@nameuse{endplot@\psplotstyle}}
%
%%%%%%%\psframeA ---------------------
\def\psframeA{\pst@object{psframeA}}
\def\psframeA@i(#1){%
\@ifnextchar({\psframeA@ii(#1)}{\psframeA@ii(0,0)(#1)}}
\def\psframeA@ii(#1)(#2){%
\begin@ClosedObj
\pst@getcoor{#1}\pst@tempa%
\pst@@getcoor{#2}%
\def\pst@linetype{2}%
\addto@pscode{%
    \tx@optionsanamorphosis
    \tx@optionsanamorphosisAdd
    \pst@tempa
    \pst@coor
    /Y2 ED
    /X2 ED
    /Y1 ED
    /X1 ED
    X1 Y1  tx@anamorphosisPathDict begin Anamorphose end
    moveto
    0 0.005 1.0 { %(X1,Y1)->(X2,Y1)
    /K exch def
    K X2 mul 1 K sub X1 mul add
    Y1
    tx@anamorphosisPathDict begin Anamorphose end
    lineto
    } for
    0 0.005 1.0 { % (X2,Y1)->(X2,Y2)
    /K exch def
    X2
    K Y2 mul 1 K sub Y1 mul add
    tx@anamorphosisPathDict begin Anamorphose end
    lineto
    } for
    0 0.005 1.0 { % (X2,Y2)->(X1,Y2)
    /K exch def
    K X1 mul 1 K sub X2 mul add
    Y2
    tx@anamorphosisPathDict begin Anamorphose end
    lineto
    } for
    0 0.005 1.0 { % (X1,Y2)->(X1,Y1)
    /K exch def
    X1
    K Y1 mul 1 K sub Y2 mul add
    tx@anamorphosisPathDict begin Anamorphose end
    lineto
    } for
}%
\showpointsfalse
\end@ClosedObj}
%
%%%%%%%\translateA ---------------------------
\def\translateA{\def\pst@par{}\pst@object{translateA}}
\def\translateA@i(#1){{%
\pst@@getcoor{#1}%
\addto@pscode{
    \tx@optionsanamorphosis
    \tx@optionsanamorphosisAdd
 \pst@coor
tx@anamorphosisPathDict begin Anamorphose end
    translate}}}%
%




\begin{document}

%% === BEGIN == Page de garde =================================================

\thispagestyle{empty}

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\begin{pspicture}(0,0)(21,29.7)
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}
\pstPutAbs(2.5,-3.75){%
\includegraphics[scale=1]{pst-anamorphosis}
}
\pstPutAbs(2.5,-5.25){%
\LARGE \textbf{\syracuseTitle}
}
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\begin{pspicture}(0,0)(12,12)
\rput(4,4){\includegraphics[height=8cm]{Eiffel}}
%\rput(4,4){\includegraphics[height=8cm]{\syracuseGraphic}}
%\psframe(0,0)(8,8)
\end{pspicture}
}
\pstPutAbs(12.5,-15){%
\parbox{0.4\textwidth}{\Large\raggedleft
   {\LARGE\textbf{Contributeurs}}\\[0.2cm]
   J\"{u}rgen \textsc{Gilg}\\
   Manuel \textsc{Luque}\\
   Jean-Michel \textsc{Sarlat}
}}
\vfill
\begin{center}
\textcolor{white}{\textbf{\today}}\\[0.3cm]
\textcolor{white}{\url{http://melusine.eu.org/syracuse/G/pst-anamorphosis/}}\\
\includegraphics[scale=0.4]{logo_syracuse}
\end{center}

%% == END == Page de garde ====================================================

\newpage


\begin{abstract}
Il est relativement facile d'adapter les commandes de \textsf{PSTricks} \`{a} \textsf{pst-anamorphosis}. C'est ainsi que la plupart des macros de \textsf{pst-anamorphosis-add} sont des adaptations de celles de \textsf{PStricks}. Toutes ne l'on pas \'{e}t\'{e} pour ne pas alourdir inutilement le package. Nous allons d\'{e}tailler sur un exemple la fa\c{c}on de proc\'{e}der.

Remarque : toutes les macros ne sont pas adaptables, cela serait le cas si les anamorphoses transformaient une ligne droite en une ligne droite. Or, \`{a} part la perspective, ce n'est pas le cas. En cons\'{e}quence, \verb+\psline+, \verb+\psframe+, \verb+\pspolygon+ doivent \^{e}tre r\'{e}\'{e}crits en divisant le segment initial en un grand nombre de petits segments : pour  \verb+\pslineA+ par exemple chaque segment initial est divis\'{e} en 200 parties et ceci quelle que soit sa longueur, dans l'id\'{e}al il faudrait tenir compte de la longueur du segment avant de choisir le nombre de segmentations.
\end{abstract}


\section{\textbackslash{}psparametricplotA}

\subsection{Adaptation}

\`{A} partir d'une copie de \textbackslash{}\textsf{psparametricplot} :
\begin{enumerate}
  \item On remplace parout \textsf{psparametricplot} par \textsf{psparametricplotA} ;
  \item dans le premier \verb+\addto@pscode{%+
  \begin{lstlisting}
  \addto@pscode{%
    \tx@optionsanamorphosis
    \tx@optionsanamorphosisAdd
      #3 %prefix PS code
      \psplot@init
  \end{lstlisting}
  on introduit juste au d\'{e}but les variables de \textsf{pst-anamorphosis} ;
  \item et pour terminer dans \verb+/xy {+:
\begin{lstlisting}
          /xy {
        \ifPst@algebraic F@pstplot \else #5 \fi
        \pst@number\psyunit mul exch
        \pst@number\psxunit mul exch
        tx@anamorphosisPathDict begin Anamorphose end
      } def
\end{lstlisting}
 on ins\`{e}re \`{a} la fin les calculs propres \`{a} l'anamorphose. C'est termin\'{e}, la macro est op\'{e}rationnelle !
\end{enumerate}


\subsection{Exemple}

\begin{center}
\begin{pspicture}(-6,-6)(6,6)
\pscircle[doubleline=true]{3}
\psset{type=conical}
\pscircle[linecolor=blue](0,0){1}
\pscircleA[linecolor=blue](0,0){1}
\pscircle[linecolor=blue](0,0){2}
\pscircleA[linecolor=blue](0,0){2}
\psframeA[linecolor=blue,fillstyle=solid,fillcolor=cyan](1,1)(2,2)
\psframeA[linecolor=blue,fillstyle=solid,fillcolor=cyan](-1,-1)(-2,-2)
\psframeA[linecolor=blue,fillstyle=solid,fillcolor=cyan](-1,1)(-2,2)
\psframeA[linecolor=blue,fillstyle=solid,fillcolor=cyan](1,-1)(2,-2)
\psframe[linecolor=blue,fillstyle=solid,fillcolor=cyan](1,1)(2,2)
\psframe[linecolor=blue,fillstyle=solid,fillcolor=cyan](-1,-1)(-2,-2)
\psframe[linecolor=blue,fillstyle=solid,fillcolor=cyan](-1,1)(-2,2)
\psframe[linecolor=blue,fillstyle=solid,fillcolor=cyan](1,-1)(2,-2)
\parametricplotA[plotpoints=3600,linecolor=red,linewidth=1mm]{0}{360}{%
  /Radius 1.5 0.5 t 10 mul sin mul add def
  Radius t cos mul
  Radius t sin mul
    }
\parametricplot[plotpoints=3600,linecolor=red,linewidth=1mm]{0}{360}{%
  /Radius 1.5 0.5 t 10 mul sin mul add def
  Radius t cos mul
  Radius t sin mul
    }
\multido{\n=0.5+0.5,\N=0.5+0.5}{4}{%
    \pnode(! \n\space -2){A}
    \pnode(! \n\space 2){B}
    \psline(A)(B)
    \pslineA(A)(B)
    \pnode(!-2 \N){A}
    \pnode(!2 \N){B}
    \pslineA(A)(B)
    \psline(A)(B)
    }
\multido{\n=-2.0+0.5,\N=-2.0+0.5}{4}{%
    \pnode(! \n\space -2){A}
    \pnode(! \n\space 2){B}
    \psline(A)(B)
    \pslineA(A)(B)
    \pnode(!-2 \N){A}
    \pnode(!2 \N){B}
    \pslineA(A)(B)
    \psline(A)(B)
    }
\psline(-2,0)(2,0)
\psline(0,-2)(0,2)
\pslineA(0,-2)(0,-0.5)
\pslineA(0,2)(0,0.5)
\pslineA(-2,0)(-0.5,0)
\pslineA(2,0)(0.5,0)
\psdot[dotstyle=x,dotsize=.2](0,0)
\end{pspicture}
\end{center}
\begin{lstlisting}
\parametricplotA[plotpoints=3600,linecolor=red,linewidth=1mm]{0}{360}{%
  /Radius 1.5 0.5 t 10 mul sin mul add def
  Radius t cos mul
  Radius t sin mul
    }
\parametricplot[plotpoints=3600,linecolor=red,linewidth=1mm]{0}{360}{%
  /Radius 1.5 0.5 t 10 mul sin mul add def
  Radius t cos mul
  Radius t sin mul
\end{lstlisting}


\section{\textbackslash{}psframeA}

\verb+\psframeA(x1,y1)(x2,y2)+ a les m\^{e}mes propri\'{e}t\'{e}s que \verb+\psframe+
\begin{center}
\begin{pspicture}(-6,-6)(6,6.5)
\psset{type=conical,Rmirror=3}
\psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](-0.25,-0.25)(-0.01,-0.01)
\psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](-0.25,0.25)(-0.01,0.01)
\psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](0.01,0.01)(0.25,0.25)
\psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](0.01,-0.01)(0.25,-0.25)
\multido{\ry=-2.75+1,\rY=-2.25+1}{6}{
\multido{\n=-2.75+1.00,\N=-2.25+1.00}{7}{%
    \psframeA[fillstyle=solid,fillcolor=red,linecolor=red](\n,\ry)(\N,\rY)}
    }
\multido{\ry=-3.25+1,\rY=-2.75+1}{3}{
\multido{\n=-3.25+1.00,\N=-2.75+1.00}{7}{%
    \psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](\n,\ry)(\N,\rY)}
    }
\multido{\ry=0.75+1,\rY=1.25+1}{3}{
\multido{\n=-3.25+1.00,\N=-2.75+1.00}{7}{%
    \psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](\n,\ry)(\N,\rY)}
    }
\multido{\n=-3.25+1.00,\N=-2.75+1.00}{3}{%
    \psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](\n,-0.25)(\N,0.25)}
\multido{\n=0.75+1.00,\N=1.25+1.00}{3}{%
    \psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](\n,-0.25)(\N,0.25)}
\begin{psclip}{\pscircle[fillstyle=solid,fillcolor=white,linestyle=none]{3}}
\multido{\ry=-2.75+1,\rY=-2.25+1}{6}{
\multido{\n=-2.75+1.00,\N=-2.25+1.00}{6}{%
    \psframe*[linecolor=red](\n,\ry)(\N,\rY)}
    }
\multido{\ry=-3.25+1,\rY=-2.75+1}{7}{
\multido{\n=-3.25+1.00,\N=-2.75+1.00}{7}{%
    \psframe*[linecolor=blue](\n,\ry)(\N,\rY)}
    }
\pscircle[doubleline=true]{3}
\end{psclip}
\end{pspicture}
\end{center}
\begin{lstlisting}
    \multido{\ry=-2.75+1,\rY=-2.25+1}{6}{
\multido{\n=-2.75+1.00,\N=-2.25+1.00}{7}{%
    \psframeA[fillstyle=solid,fillcolor=red,linecolor=red](\n,\ry)(\N,\rY)}
    }
\multido{\ry=-3.25+1,\rY=-2.75+1}{3}{
\multido{\n=-3.25+1.00,\N=-2.75+1.00}{7}{%
    \psframeA[fillstyle=solid,fillcolor=blue,linecolor=blue](\n,\ry)(\N,\rY)}
    }
\end{lstlisting}


\section{\textbackslash{}pspolygonA}

En r\'{e}alit\'{e} la macro \verb+pspolygonA+ n'a pas \'{e}t\'{e} \'{e}crite. En effet il suffit de servir de \verb+\pslineA+ et de boucler le chemin en revenant au point origine.
\begin{center}
\begin{pspicture}(-5,-5)(5,5)
\psset{type=conical,Rmirror=3}
\pspolygon[linecolor=red,linewidth=1mm](2.5;30)(2.5;90)(2.5;150)(2.5;210)(2.5;270)(2.5;330)
\pslineA[linecolor=red,linewidth=1mm](2.5;30)(2.5;90)(2.5;150)(2.5;210)(2.5;270)(2.5;330)(2.5;30)
\rput(1.25,1){\pspolygon[linecolor=blue,fillstyle=solid,linewidth=1mm,fillcolor={[rgb]{1 0.875 0.5}}](0.75;30)(0.75;90)(0.75;150)(0.75;210)(0.75;270)(0.75;330)}
\multido{\i=30+60,\I=1+1}{6}{%
    \pnode(!\i\space cos 0.75 mul 1.25 add \i\space sin 0.75 mul 1 add){A\I}
    }
\pslineA[linecolor=blue,fillstyle=solid,linewidth=1mm,fillcolor={[rgb]{1 0.875 0.5}}](A1)(A2)(A3)(A4)(A5)(A1)
\pscircle[doubleline=true]{3}
\psdot[dotstyle=x](0,0)
\end{pspicture}
\end{center}
\begin{lstlisting}
\begin{pspicture}(-5,-5)(5,5)
\psset{type=conical,Rmirror=3}
\pspolygon[linecolor=red,linewidth=1mm](2.5;30)(2.5;90)(2.5;150)(2.5;210)(2.5;270)(2.5;330)
\pslineA[linecolor=red,linewidth=1mm](2.5;30)(2.5;90)(2.5;150)(2.5;210)(2.5;270)(2.5;330)(2.5;30)
\rput(1.25,1){\pspolygon[linecolor=blue,fillstyle=solid,linewidth=1mm,fillcolor={[rgb]{1 0.875 0.5}}](0.75;30)(0.75;90)(0.75;150)(0.75;210)(0.75;270)(0.75;330)}
\multido{\i=30+60,\I=1+1}{6}{%
    \pnode(!\i\space cos 0.75 mul 1.25 add \i\space sin 0.75 mul 1 add){A\I}
    }
\pslineA[linecolor=blue,fillstyle=solid,linewidth=1mm,fillcolor={[rgb]{1 0.875 0.5}}](A1)(A2)(A3)(A4)(A5)(A1)
\pscircle[doubleline=true]{3}
\psdot[dotstyle=x](0,0)
\end{pspicture}
\end{lstlisting}
On remarquera que le \verb+\rput(1.25,1)+ doit \^{e}tre remplac\'{e} par un calcul adapt\'{e}. La macro \verb+\rputA+ n'a pas \'{e}t\'{e} d\'{e}finie.
\end{document}