lyra-wasm-scripting-test/guests/csharp/dotnet-guest-test/ExampleWorldImpl.cs

namespace ExampleWorld;

using System.Diagnostics.CodeAnalysis;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using ExampleWorld.wit.imports.lyra.api;
using LyraApi;
using LyraApi.Ecs;

[StructLayout(LayoutKind.Sequential)]
struct Vec3(float x, float y, float z) : IComponent
{
    /// <summary>
    /// The X component.
    /// </summary>
    public float X { get; set; } = x;
    /// <summary>
    /// The Y component
    /// </summary>
    public float Y { get; set; } = y;
    /// <summary>
    /// The Z component
    /// </summary>
    public float Z { get; set; } = z;

    public static string HostName => "Vec3";
    public static ulong HostSize => (ulong)Marshal.SizeOf<Vec3>();
    public static ulong HostAlignment => (ulong)MarshalUtils.AlignmentOf<Vec3>();
    public static ulong TypeId => 4124409524;

    public static object? TakeFromBytes(byte[] bytes)
    {
        byte[] taken = bytes.Take((int)HostSize).ToArray();
        return MarshalUtils.FromBytes<Vec3>(taken);
    }
}

public class ExampleWorldImpl : IExampleWorld
{
    public static void OnInit(IEcs.EcsWorld gameWorld, IEcs.Entity owningEntity)
    {
        var world = new World(gameWorld);
        Entity entity = world.Spawn(new Vec3(7.0f, 30.0f, 18.0f));
        Console.WriteLine("C#:   Spawned entity with id {0}", entity.Id);

        foreach ((Entity en, Vec3 comp) in world.View<Vec3>())
        {
            Console.WriteLine("C#:   Found entity at ({0}, {1}, {2})", comp.X, comp.Y, comp.Z);
        }
    }

    public static void OnUpdate(IEcs.EcsWorld gameWorld, IEcs.Entity owningEntity)
    {
        throw new NotImplementedException();
    }
}