File:Turing-machine.svg

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Original file(SVG file, nominally 385 × 83 pixels, file size: 23 KB)

Summary[edit]

Description
English: Turing-machine

Created using the tikz package and compiled with pdflatex.

\documentclass{standalone}
\usepackage[utf8]{inputenc}
\usepackage{ifthen}
\usepackage{tikz}
\usetikzlibrary{chains}
\usetikzlibrary{calc, decorations.pathmorphing}
\tikzstyle{track}=[thick, draw, minimum height=5mm, minimum width=7mm, fill=green!35,outer sep=0pt]
\tikzstyle{head}=[very thick, draw, minimum height=6mm, minimum width=5mm, fill=none,outer sep=0pt]

\def\DrawTrack#1{
\begin{scope}[start chain=1 going right,node distance=-0.15mm]
    % start track
    \node [on chain=1,track,draw=none, track, fill=none, draw=none] at (0,-\i*0.5) (node\i0){};
    \draw [fill=green!35,thick] (node\i0.north east) -- ++(.15,0) 
    {-- ($(node\i0.north east)+(-\shiftl-\rate*\i,0)$)}
    decorate [decoration={zigzag, segment length=.10cm, amplitude=.015cm}] 
    {-- ($(node\i0.south east)+(-\shiftl-\rate*\i-\rate,0)$)} -- (node\i0.south east) -- cycle;
    % draw track
      \foreach [count=\j] \element in \adlist {     
	  \ifthenelse{\j = \head}{ % read-write heads current position
		    \node [on chain=1,track, fill=red!35] (node\i\j){\element};
	      }
	      {
		    \node [on chain=1,track] (node\i\j) {\element};
	      }
      }    
    % close track
    \draw [fill=green!35, thick] (node\i\j.north east) -- ++(.15,0) 
    {-- ($(node\i\j.north east)+(\shiftr-\rate*\i,0)$)}
    decorate [decoration={zigzag, segment length=.10cm, amplitude=.015cm}] 
    {-- ($(node\i\j.south east)+(\shiftr-\rate*\i-\rate,0)$)} -- (node\i\j.south east) -- cycle;
    \node [on chain=1,track, fill=none, draw=none] (end\i) {};
    \node [right = of end\i]{\tiny tape};
    
\end{scope}
}

\newcount\lastnode
\begin{document}
% Define the turing machine as a list of lists of symbols on each track of the tape.
\newcommand{\tracks}{{1,1,,1, 0, 1 , 0,, 1 , 1, 0, 1}}
\newcommand{\head}{9}

% parameters
\newcommand{\shiftr}{0.35} % increase for more tracks
\newcommand{\shiftl}{0.1} % increase for more tracks
\newcommand{\rate}{0.05}
\begin{tikzpicture}
% Draw program node
\draw (4.3, 1) node [draw, thick, rectangle, minimum height= 1cm, minimum width=4cm, fill=white, rounded corners] (program){program};

% Draw tracks
\foreach [count=\i] \adlist in \tracks {
    \DrawTrack{\i, \adlist}   
}
% Draw Head
\draw[very thick] {($(node1\head.north west)+(-0,0.07)$)} 
		  {-- ($(node1\head.north east)+(+0,0.07)$)}
		  {-- ($(node\i\head.south east)+(+0,-0.07)$)}
		  {-- ($(node\i\head.south west)+(-0,-0.07)$)}
		  -- cycle;
\draw[thick, rounded corners=3pt] (program) {-- node[right]{\tiny head} ($(node1\head.north)+(+0,0.07)$)};
\end{tikzpicture}
\end{document}
Date
Source Own work
Author Wdvorak

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I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons

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Date/TimeThumbnailDimensionsUserComment
current20:31, 2 September 2016Thumbnail for version as of 20:31, 2 September 2016385 × 83 (23 KB)Wdvorak (talk | contribs)User created page with UploadWizard
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