In reply to @6b6279:freiburg.social
That was three years ago, and as far as I know, the project is active. Have you opened an issue at the LuaTeX repository?

In reply to @marcel:2krueger.de
LuaMetaTeX is running with Lua 5.4, I think for LuaTeX there was an explicit decision to avoid it.

In reply to @some.knowit:matrix.org
A completely different question - when do people find it more useful or prefer to use ConTeXt over, say, LuaLaTeX?

In reply to @6b6279:freiburg.social
Is there a way to regenerate random shapes, e.g., starbursts in a tikzpicture? I don't know how but, despite deleting all intermediate files, LaTeX keeps generating the exact same starburst.

I think so. This seems to work:

\documentclass{standalone}
\usepackage{tikz}
\usepackage{pgfmath}
\usepackage{pgffor}

\begin{document}

\begin{tikzpicture}

% Seed the random number generator
\pgfmathsetseed{\pdfuniformdeviate256}

% Function to generate a starburst
\def\starburst{
    \pgfmathsetmacro{\numrays}{int(5 + rand*6)} % Random number of rays between 5 and 10
    \pgfmathsetmacro{\innerradius}{0.5 + rand*0.5} % Random inner radius between 0.5 and 1
    \pgfmathsetmacro{\outerradius}{1.5 + rand*1.5} % Random outer radius between 1.5 and 3

    \foreach \i in {1,...,\numrays}{
        \pgfmathsetmacro{\angle}{\i * 360 / \numrays}
        \pgfmathsetmacro{\nextangle}{(\i + 1) * 360 / \numrays}
        \draw (0,0) -- (\angle:\outerradius) arc[start angle=\angle, end angle=\nextangle, radius=\outerradius] -- cycle;
    }
}
% Draw multiple starbursts at random positions
\foreach \j in {1,...,5} {
    \pgfmathsetmacro{\xpos}{rand*10} % Random x position
    \pgfmathsetmacro{\ypos}{rand*10} % Random y position
    \begin{scope}[shift={(\xpos,\ypos)}]
        \starburst
    \end{scope}
}
\end{tikzpicture}
\end{document}

In reply to @6b6279:freiburg.social
Is there a way to regenerate random shapes, e.g., starbursts in a tikzpicture? I don't know how but, despite deleting all intermediate files, LaTeX keeps generating the exact same starburst.

I think so. This seems to work (ie different output across different compilations):

\documentclass{standalone}
\usepackage{tikz}
\usepackage{pgfmath}
\usepackage{pgffor}

\begin{document}

\begin{tikzpicture}

% Seed the random number generator
\pgfmathsetseed{\pdfuniformdeviate256}

% Function to generate a starburst
\def\starburst{
    \pgfmathsetmacro{\numrays}{int(5 + rand*6)} % Random number of rays between 5 and 10
    \pgfmathsetmacro{\innerradius}{0.5 + rand*0.5} % Random inner radius between 0.5 and 1
    \pgfmathsetmacro{\outerradius}{1.5 + rand*1.5} % Random outer radius between 1.5 and 3

    \foreach \i in {1,...,\numrays}{
        \pgfmathsetmacro{\angle}{\i * 360 / \numrays}
        \pgfmathsetmacro{\nextangle}{(\i + 1) * 360 / \numrays}
        \draw (0,0) -- (\angle:\outerradius) arc[start angle=\angle, end angle=\nextangle, radius=\outerradius] -- cycle;
    }
}
% Draw multiple starbursts at random positions
\foreach \j in {1,...,5} {
    \pgfmathsetmacro{\xpos}{rand*10} % Random x position
    \pgfmathsetmacro{\ypos}{rand*10} % Random y position
    \begin{scope}[shift={(\xpos,\ypos)}]
        \starburst
    \end{scope}
}
\end{tikzpicture}
\end{document}

I see in Koerner2015.lua there exists an exaple that makes use of a simple pedigree layout:

   \tikz \graph [simple pedigree layout, default edge operator=complete bipartite]
    {
      Eve -- [mate] Felix;
      { Eve, Felix } -> [child] { George, Hank };

      Alice -- [mate] Bob;
      { Alice, Bob } -> [child] { Charly, Dave, Eve };
    };

Does anyone know what preamble (eg \usetikzlibrary{graphs,graphdrawing} \usegdlibrary{???} needs to be specified for this example to compile?

I see in Koerner2015.lua there exists an example that makes use of a simple pedigree layout:

   \tikz \graph [simple pedigree layout, default edge operator=complete bipartite]
    {
      Eve -- [mate] Felix;
      { Eve, Felix } -> [child] { George, Hank };

      Alice -- [mate] Bob;
      { Alice, Bob } -> [child] { Charly, Dave, Eve };
    };

Does anyone know what preamble (eg \usetikzlibrary{graphs,graphdrawing} \usegdlibrary{???} needs to be specified for this example to compile?

In reply to @some.knowit:matrix.org

I see in Koerner2015.lua there exists an example that makes use of a simple pedigree layout:

   \tikz \graph [simple pedigree layout, default edge operator=complete bipartite]
    {
      Eve -- [mate] Felix;
      { Eve, Felix } -> [child] { George, Hank };

      Alice -- [mate] Bob;
      { Alice, Bob } -> [child] { Charly, Dave, Eve };
    };

Does anyone know what preamble (eg \usetikzlibrary{graphs,graphdrawing} \usegdlibrary{???} needs to be specified for this example to compile?

I see there are BalloonLayout.lua and CircularLayout.lua. Are these actually in use or are they work in progress? The example code, for instance, involves a CircularLayout:

\tikz \graph [CircularLayout, part sep=1cm] {
  a -- b -- c -- a -- d -- e -- f -- g -- d;
  b -- {x,y,z};
};

But as far as I understand to use a circular layout, we would do something like the following instead:

\usetikzlibrary{graphs,graphdrawing} \usegdlibrary{circular}
\begin{document}

\tikz \graph [simple necklace layout, part sep=1cm] {
      a -- b -- c -- a -- d -- e -- f -- g -- d;
      b -- {x,y,z};
    };
\end{document}

What am I missing?

I see there are BalloonLayout.lua and CircularLayout.lua. Are these actually in use or are they work in progress? The example code in these files, for instance, involves a CircularLayout:

\tikz \graph [CircularLayout, part sep=1cm] {
  a -- b -- c -- a -- d -- e -- f -- g -- d;
  b -- {x,y,z};
};

But as far as I understand to use a circular layout, we would do something like the following instead:

\usetikzlibrary{graphs,graphdrawing} \usegdlibrary{circular}
\begin{document}

\tikz \graph [simple necklace layout, part sep=1cm] {
      a -- b -- c -- a -- d -- e -- f -- g -- d;
      b -- {x,y,z};
    };
\end{document}

What am I missing?

I see there are BalloonLayout.lua and CircularLayout.lua. Are these actually in use or are they work in progress? The example code in these files, for instance, involves a CircularLayout:

\tikz \graph [CircularLayout, part sep=1cm] {
  a -- b -- c -- a -- d -- e -- f -- g -- d;
  b -- {x,y,z};
};

But as far as I understand to use a circular layout, we would do something like the following instead:

\usetikzlibrary{graphs,graphdrawing} \usegdlibrary{circular}
\begin{document}
\tikz \graph [simple necklace layout, part sep=1cm] {
      a -- b -- c -- a -- d -- e -- f -- g -- d;
      b -- {x,y,z};
    };
\end{document}

What am I missing?

In reply to @some.knowit:matrix.org

I see there are BalloonLayout.lua and CircularLayout.lua. Are these actually in use or are they work in progress? The example code in these files, for instance, involves a CircularLayout:

\tikz \graph [CircularLayout, part sep=1cm] {
  a -- b -- c -- a -- d -- e -- f -- g -- d;
  b -- {x,y,z};
};

But as far as I understand to use a circular layout, we would do something like the following instead:

\usetikzlibrary{graphs,graphdrawing} \usegdlibrary{circular}
\begin{document}
\tikz \graph [simple necklace layout, part sep=1cm] {
      a -- b -- c -- a -- d -- e -- f -- g -- d;
      b -- {x,y,z};
    };
\end{document}

What am I missing?

In reply to @some.knowit:matrix.org

I see there are BalloonLayout.lua and CircularLayout.lua. Are these actually in use or are they work in progress? The example code in these files, for instance, involves a CircularLayout:

\tikz \graph [CircularLayout, part sep=1cm] {
  a -- b -- c -- a -- d -- e -- f -- g -- d;
  b -- {x,y,z};
};

But as far as I understand to use a circular layout, we would do something like the following instead:

\usetikzlibrary{graphs,graphdrawing} \usegdlibrary{circular}
\begin{document}
\tikz \graph [simple necklace layout, part sep=1cm] {
      a -- b -- c -- a -- d -- e -- f -- g -- d;
      b -- {x,y,z};
    };
\end{document}

What am I missing?