Como mostrar todo o índice, passo a passo, em uma apresentação do Beamer?

Question

Gostaria de mostrar todo o índice da minha apresentação, passo a passo, seção após seção. Para fazer isso, acho que tenho que reorganizar esta parte do meu preâmbulo conforme aparece abaixo no meu MWE:\AtBeginSubsection[]

Como eu poderia consertar isso?

\documentclass{beamer}
\setbeamertemplate{section in toc}{\hspace*{1em}\inserttocsectionnumber.~\inserttocsection\par}
\setbeamertemplate{subsection in toc}{\hspace*{2em}\inserttocsectionnumber.\inserttocsubsectionnumber.~\inserttocsubsection\par}
\setbeamertemplate{subsubsection in toc}{\hspace*{3em}\inserttocsectionnumber.\inserttocsubsectionnumber.\inserttocsubsubsectionnumber.~\inserttocsubsubsection\par}

\AtBeginSubsection[]
{
\begin{frame}<beamer>
\frametitle{Outline}
\tableofcontents[
  currentsection,
  sectionstyle=show/show,
  subsectionstyle=show/shaded/hide,
  subsubsectionstyle=show/shaded,
]
\end{frame}
}


\begin{document}

\begin{frame}{outline}
\tableofcontents    
\end{frame}

\section{Section title}
\begin{frame}{Section frame}
\end{frame}

\subsection{Subsection title}
\begin{frame}{Subsection frame}
\end{frame}

\subsubsection{Subsubsection title}
\begin{frame}{Subsubsection frame}
\end{frame}

\end{document}

Answer 1

Em cada nova seção, o toc com todas as entradas até e incluindo esta seção.

\AtBeginSection
{
\begin{frame}
  \frametitle{Outline}
   \tableofcontents[sections={1-\thesection}]
\end{frame}
}

O código geral

\documentclass{beamer}
\setbeamertemplate{section in toc}{\hspace*{1em}\inserttocsectionnumber.~\inserttocsection\par}
\setbeamertemplate{subsection in toc}{\hspace*{2em}\inserttocsectionnumber.\inserttocsubsectionnumber.~\inserttocsubsection\par}
\setbeamertemplate{subsubsection in toc}{\hspace*{3em}\inserttocsectionnumber.\inserttocsubsectionnumber.\inserttocsubsubsectionnumber.~\inserttocsubsubsection\par}

%\AtBeginSubsection[]
\AtBeginSection
{
\begin{frame}<beamer>
\frametitle{Outline}
\tableofcontents[
    sections={1-\thesection},
%   currentsection,
%   sectionstyle=show/show,
%   subsectionstyle=show/shaded/hide,
%   subsubsectionstyle=show/shaded,
]
\end{frame}
}


\begin{document}

\begin{frame}{outline}
\tableofcontents
\end{frame}

\section{First section title}
\begin{frame}{Section frame}
\end{frame}

\subsection{Subsection title}
\begin{frame}{Subsection frame}
\end{frame}

\subsubsection{Subsubsection title}
\begin{frame}{Subsubsection frame}
\end{frame}

\section{Second section title}
\begin{frame}{Section frame}
\end{frame}

\subsection{Subsection title}
\begin{frame}{Subsection frame}
\end{frame}

\subsubsection{Subsubsection title}
\begin{frame}{Subsubsection frame}
\end{frame}

\section{Third section title}
\begin{frame}{Section frame}
\end{frame}

\subsection{Subsection title}
\begin{frame}{Subsection frame}
\end{frame}

\subsubsection{Subsubsection title}
\begin{frame}{Subsubsection frame}
\end{frame}
\end{document}