Ebbinghaus' illusion

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Author:

cmhughes

Last Updated:

há 10 anos

License:

Creative Commons CC BY 4.0

Abstract:

Submitted as an answer to the Showcase of Optical Illusions question on TeX SX.

Click the Illusions tag below to see more!

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\begin{now}

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% Source: http://tex.stackexchange.com/a/129302/23931
% arara: pdflatex
% !arara: indent: {overwrite: yes}
\documentclass{standalone}

\usepackage{tikz}

\begin{document}
\begin{tikzpicture}[baseline=(X.base)]
    \node[circle,fill=orange,draw=orange,minimum size=2cm] (X) at (0,0) {};
    \foreach \i in {0,60,...,330}{
        \filldraw[blue!50!white]  (\i:3.4) circle (1.6);}
\end{tikzpicture}
\hspace{1cm}
\begin{tikzpicture}[baseline=(X.base)]
    \node[circle,fill=orange,draw=orange,minimum size=2cm] (X) at (0,0) {};
    \foreach \i in {0,45,...,360}{
        \filldraw[blue!50!white]  (\i:1.5)  circle (.4);}
\end{tikzpicture}
\end{document}

Ebbinghaus' illusion

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