preamble.tex

\usepackage{ifxetex,ifluatex}

\newif\ifxetexorluatex
\ifxetex
  \xetexorluatextrue
\else
  \ifluatex
    \xetexorluatextrue
  \else
    \xetexorluatexfalse
  \fi
\fi

%gets rid of bottom navigation bars
\setbeamertemplate{footline}[frame number]{}

%gets rid of bottom navigation symbols
\setbeamertemplate{navigation symbols}{}

%gets rid of footer
%will override 'frame number' instruction above
%comment out to revert to previous/default definitions
\setbeamertemplate{footline}{}

\usepackage{tikz}
\usepackage{graphicx}
\usepackage{standalone}
\usepackage{float}
\usepackage{tcolorbox}
\usepackage{url}
\usepackage{hyperref}
\hypersetup{
    colorlinks=true,
    }

\usetikzlibrary{calc}
\usetikzlibrary{external}
\tikzexternalize[prefix=output/]

\usepackage{environ}

%\setmainfont[Ligatures=TeX]{BwModelica-ExtraBold.otf}
\ifxetexorluatex
    % If using xelatex or lualatex:
    \usepackage{fontspec}
    \setmainfont{BwModelica}[
    Extension = .otf ,
    UprightFont = *-Bold ,
    ItalicFont = *-BoldItalic ,
    BoldFont = BwModelica-ExtraBold ,
    BoldItalicFont = BwModelica-ExtraBoldItalic,
    ]
\else
    % If using pdflatex:
    \PackageError{UCLouvainFont}{Don't use pdfLaTeX}{Please switch your compiler to either XeTeX or LuaTeX.}
\fi

\NewEnviron{visual}[1][unnamed]
    {%
    \begin{frame}
        \frametitle{#1}
        \tikzsetnextfilename{#1}
        \centering
        \fbox{\BODY}
    \end{frame}
    }

\definecolor{blue-light}{HTML}{9db6d7}
\definecolor{blue-medium}{HTML}{6eb7e8}
\definecolor{blue-dark}{HTML}{15213b}