Simulation

Library providing a way to broadcast messages to added listeners.

Running simulators

Simulators contain and update systems:

public static void Main()
{
    using Simulator simulator = new();
    simulator.Add(new ProgramSystems());
    // do work
    simulator.Remove<ProgramSystems>();
}

public class ProgramSystems : IDisposable
{
    public ProgramSystems()
    {
        //before addition
    }

    public void Dispose()
    {
        //after removal
    }
}

Receiving messages

A system that is partial, and implementing the IListener<T> interface will allow it to receive messages broadcast by the simulator:

simulator.Broadcast(32f);
simulator.Broadcast(32f);
simulator.Broadcast(32f);

public partial class ListenerSystem : IListener<float>
{
    void IListener<float>.Receive(ref float message)
    {
    }
}

Messages can also be broadcast by reference, allowing systems to modify them, and use it to communicate between different projects:

LoadRequest request = new();
simulator.Broadcast(ref request);
Assert.That(request.loaded, Is.True);

public partial class LoadSystem : IListener<LoadRequest>
{
    void IListener<float>.Receive(ref LoadRequest message)
    {
        message.loaded = true;
    }
}

public struct LoadRequest
{
    public bool loaded;
}

Global simulator

Another way to have listeners and broadcasting setup, is using the included GlobalSimulator type. This approach is slimmer than with the Simulator, at the cost of the listeners being global to the entire runtime.

public class Program
{
    public static void Main()
    {
        GlobalSimulatorLoader.Load();
        GlobalSimulator.Broadcast(32f);
        GlobalSimulator.Broadcast(32f);
        GlobalSimulator.Broadcast(32f);
    }
}

public static class Systems
{
    [Listener<float>]
    public static void Update(ref float message)
    {
    }
}

Contributing and design

This library is created for composing behaviour of programs using systems, ideally created by separate isolated projects.

Contributions to this goal are welcome.