Draft: Use Bundlex for Binding GDExtension to Elixir for Libgodot to Implement a Distributed Simulation

Context

The V-Sekai development team is striving to enhance the simulation experience in our VR game. We aim to create a more immersive and interactive environment for our players.

Problem Statement

We can bind GDExtension to a C-like language for libgodot to implement a distributed simulation.

Proposed Solution

Instead of godot-zig, we propose using Bundlex, a multi-platform tool for compiling C and C++ code along with Elixir projects. This will allow us to use the power of Elixir’s concurrency and fault-tolerance features, which are ideal for creating distributed simulations.

defmodule MyProject do
  use Bundlex.Project

  def project() do
    [
      app: :my_project,
      compilers: [:bundlex],
      deps: deps()
    ]
  end

  defp deps do
    [
      {:bundlex, "~> 0.2"}
    ]
  end
end

Benefits

Enhanced simulation performance due to Elixir’s efficient handling of concurrent processes.
Improved fault tolerance, as Elixir’s supervisor trees can automatically recover from errors.
Increased developer productivity, as Elixir’s syntax is concise and expressive.

Downsides

Requires learning a new programming language (Elixir), which may increase the development time initially.
Potential compatibility issues between Elixir and existing parts of the system.

Alternatives Considered

We considered using other languages like Rust or Go, but they did not offer the same level of concurrency and fault-tolerance features as Elixir.

Infrequent Use Case

This proposal may not be suitable for smaller projects that do not require complex distributed simulations.

Implementation

The V-Sekai development team will implement this proposal.

Status

Status: Draft

Decision Makers

V-Sekai development team

References

Bundlex. 2026. https://hex.pm/packages/bundlex.