perspective_ex01.tex

% Under Creative Commons Attribution licence 3.0
% (http://creativecommons.org/licences/by/3.0)
% Author: Florian Lesaint
% http://www.texample.net/tikz/examples/cuboid/
\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{calc}

\usepackage{xcolor}
\definecolor{space}{HTML}{0A2543}
\definecolor{earth}{HTML}{0089FA}

\begin{document}
	\begin{tikzpicture}
		\begin{scope}[scale=4]
			\draw [fill=space] (-5,3.5) rectangle (1.5,-0.5);
			\draw [color=earth] (-5,2.75) -- (1.5,2.75);
			%% Fuochi
			\coordinate (P1) at (-12cm,2.75cm); % sx
			\coordinate (P2) at (8cm,2.75cm); % dx
			%
			\coordinate (A1) at (-0.5,0);
			\coordinate (A2) at (0,1);
			\coordinate (A3) at (0.5,0);
			\coordinate (A4) at (-0.5,1);
			\coordinate (A5) at (0,2);
			\coordinate (A6) at (0.5,1);
			\coordinate (A7) at (0,2.5);
			\coordinate (A8) at (0,3);
			\coordinate (C) at (0,2.75);
			%
			\draw [ultra thick, color=white] (A1) -- (A2) -- (A3);
			\draw [ultra thick, color=white] (A2) -- (A7);
			\draw [ultra thick, color=white] (A4) -- (A5) -- (A6);
			\draw [color=white,fill=white]
				let \p1 = ($ (C) - (A7) $),  
				\n1 = {veclen(\x1,\y1)}
				in (C) circle (\n1);			
			%
			\coordinate (L1) at ($(P1)!.7!(A1)$);
			\coordinate (L2) at ($(P1)!.7!(A2)$);
			\coordinate (L3) at ($(P1)!.7!(A3)$);
			\coordinate (L4) at ($(P1)!.7!(A4)$);
			\coordinate (L5) at ($(P1)!.7!(A5)$);
			\coordinate (L6) at ($(P1)!.7!(A6)$);
			\coordinate (L7) at ($(P1)!.7!(A7)$);
			\coordinate (L8) at ($(P1)!.7!(A8)$);
			\coordinate (L) at ($(P1)!.7!(C)$);			
			%
			\draw [ultra thick, color=white] (L1) -- (L2) -- (L3);
			\draw [ultra thick, color=white] (L2) -- (L7);
			\draw [ultra thick, color=white] (L4) -- (L5) -- (L6);
			\draw [color=white,fill=white]  
				let \p1 = ($ (L) - (L7) $),  
				\n1 = {veclen(\x1,\y1)}
				in (L) circle (\n1);
		\end{scope}
	\end{tikzpicture}
\end{document}