fileIO-airfoil_from_data.tex

% http://www.texample.net/tikz/examples/airfoil-profiles/
% Read airfoils from data files
% Airfoil profiles from the UIUC Airfoil Coordinates Database
% http://www.ae.uiuc.edu/m-selig/ads/coord_database.html
% Data is released under the GNU General Public Licence. See
% http://www.ae.uiuc.edu/m-selig/pd/gpl.html for more details. 
\documentclass{standalone}

\usepackage{tikz}
\usepackage{verbatim}

\begin{comment}
:Title: Airfoil profiles
:Tags: Plots, External file, Foreach

A few airfoil profiles from the extensive `UIUC Airfoil Coordinates Database`_. The data
is provided in a convenient x,y coordinate format suitable for plotting using PGF/TikZ's
``plot file`` construct.

Note that the data is released under the `GNU General Public License`_. To use the
data files with PGF/TikZ, you have to comment out the lines not containing coordinates.

Download the airfoils used in the example: `airfoildata.zip`_

.. _UIUC Airfoil Coordinates Database: http://www.ae.uiuc.edu/m-selig/ads/coord_database.html
.. _GNU General Public License: http://www.ae.uiuc.edu/m-selig/pd/gpl.html
.. _airfoildata.zip: http://www.fauskes.net/media/pgftikzexamples/data/airfoildata.zip
\end{comment}

\begin{document}

\newcounter{y}
\setcounter{y}{0}

\begin{tikzpicture}
    % read all the data files. Don't set the data folder here
    % read the label \lbl and the filename \fn with the for loop
    \foreach \lbl / \fn in {EPPLER 625/e625.dat,
                            WORTMANN FX 2/fx2.dat,
                            EPPLER 664 (EXTENDED)/e664ex.dat,
                            CLARK Y/clarcy.dat,
                            Eiffel 10 (Wright)/eiffel10.dat,
                            FX 69-PR-281/fx69pr281.dat,
                            NACA Munk M-4 airfoil/m4.dat}
    {
        % Some profiles look better when using plot[smooth]
        \draw[yshift=-\arabic{y}cm,scale=3] node[left=0.5cm] {\lbl}
        % set the data folder in the next line
        plot file{data/\fn} -- cycle;
        \stepcounter{y}
    }
\end{tikzpicture}

\end{document}