Flag of the United Kingdom
Författare
Senan Sekhon
Last Updated
a year ago
Licens
Creative Commons CC BY 4.0
Sammanfattning
Flag of the United Kingdom of Great Britain and Northern Ireland, according to official government specifications
Flag of the United Kingdom of Great Britain and Northern Ireland, according to official government specifications
\documentclass[10pt]{article}
%This is the minimal setup required to render the flag
\usepackage[paperwidth=60cm, paperheight=30cm, top=0cm, bottom=0cm, left=0cm, right=0cm]{geometry}
%Paper width is set to 60cm by 30 cm to match the UK Government-specified aspect ratio (2:1)
\usepackage{tikz}
%\usepackage[dvipsnames]{xcolor} % Optional unless you want to use colors pre-defined by the xcolor package
% UK Government-specified colors for the flag
\definecolor{ukred}{RGB}{200,16,46}
\definecolor{ukwhite}{RGB}{255,255,255}
\definecolor{ukblue}{RGB}{1,33,105}
% Other government specifications include:
% White cross (upright) is 1/3 flag width, here it is 10 cm
% White St. Andrew's Cross (diagonal) is 1/5 flag width, here it is 6 cm
% Red cross (upright) is 1/5 flag width, here it is 6 cm
% Red St. Patrick's Cross (diagonal) is 1/15 flag width, here it is 2 cm
%Sources:
%https://www.flaginstitute.org/wp/british-flags-2/the-union-jack-or-the-union-flag/union-flag-bill-2008/
%http://www.jdawiseman.com/papers/union-jack/union-jack.html
%https://flagcolor.com/british-flag-colors/#:~:text=The%20United%20Kingdom%20flag%20is,your%20digital%20or%20print%20projects.
%Created by Senan Sekhon, December 2, 2020
\begin{document}
\begin{center}
\begin{tikzpicture}[scale=1] %Scale must be changed to make the flag fit on letter/A4 paper (scale=1 produces a 60 cm by 30 cm flag)
\clip (-30,-15) rectangle (30,15); %Optional, crops the flag to the correct size
\draw[-] (-30,-15)--(30,-15)--(30,15)--(-30,15)--cycle; %Optional, draws a border around the flag
%Blue background:
\fill[ukblue] (-30,-15)--(30,-15)--(30,15)--(-30,15)--cycle;
%White upright cross:
\fill[ukwhite] (5,15)--(5,5)--(30,5)--(30,-5)--(5,-5)--(5,-15)--(-5,-15)--(-5,-5)--(-30,-5)--(-30,5)--(-30,5)--(-5,5)--(-5,15)--cycle;
%White St. Andrew's Cross:
\fill[ukwhite] (-30,-15)--(-30,{-15+3/2*sqrt(5)})--({30-3*sqrt(5)},15)--(30,15)--(30,{15-3/2*sqrt(5)})--({-30+3*sqrt(5)},-15)--cycle; %Lower-left to upper-right
\fill[ukwhite] (-30,15)--(-30,{15-3/2*sqrt(5)})--({30-3*sqrt(5)},-15)--(30,-15)--(30,{-15+3/2*sqrt(5)})--({-30+3*sqrt(5)},15)--cycle; %Upper-left to lower-right
%Red upright Cross:
\fill[ukred] (3,15)--(3,3)--(30,3)--(30,-3)--(3,-3)--(3,-15)--(-3,-15)--(-3,-3)--(-30,-3)--(-30,3)--(-30,3)--(-3,3)--(-3,15)--cycle;
%Red St. Patrick's Cross:
\fill[ukred] ({10-2*sqrt(5)},5)--(10,5)--(30,15)--({30-2*sqrt(5)},15)--cycle; %Upper-right diagonal
\fill[ukred] (-10,5)--({-10-2*sqrt(5)},5)--(-30,{15-sqrt(5)})--(-30,15)--cycle; %Upper-left diagonal
\fill[ukred] ({-10+2*sqrt(5)},-5)--(-10,-5)--(-30,-15)--({-30+2*sqrt(5)},-15)--cycle; %Lower-left diagonal
\fill[ukred] (10,-5)--({10+2*sqrt(5)},-5)--(30,{-15+sqrt(5)})--(30,-15)--cycle; %Lower-right diagonal
\end{tikzpicture}
\end{center}
%This prints the two white crosses (upright and St. Andrew's) as a single (28-sided) shape, it is not required for the flag:
%\fill[ukwhite] (5,15)--(5,{5+2*sqrt(-11+5*sqrt(5))})--({30-3*sqrt(5)},15)--(30,15)--(30,{15-3/2*sqrt(5)})--({10+3*sqrt(5)},5)--(30,5)--(30,-5)--({10+3*sqrt(5)},-5)--(30,{-15+3/2*sqrt(5)})--(30,-15)--({30-3*sqrt(5)},-15)--(5,{-5-2*sqrt(-11+5*sqrt(5))})--(5,-15)--(-5,-15)--(-5,{-5-2*sqrt(-11+5*sqrt(5))})--({-30+3*sqrt(5)},-15)--(-30,-15)--(-30,{-15+3/2*sqrt(5)})--({-10-3*sqrt(5)},-5)--(-30,-5)--(-30,5)--({-10-3*sqrt(5)},5)--(-30,{15-3/2*sqrt(5)})--(-30,15)--({-30+3*sqrt(5)},15)--(-5,{5+2*sqrt(-11+5*sqrt(5))})--(-5,15)--cycle;
\end{document}