C# UnmanagedType example

C# UnmanagedType example.cs

public struct Vector3
{
    public float X { get; set; }
    public float Y { get; set; }
    public float Z { get; set; }

    public Vector3(float x, float y, float z)
    {
        X = x;
        Y = y;
        Z = z;
    }
}

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Ansi)]
public struct Enemy
{
    public Enemy(Vector3 position, float health, Vector3[] bones)
    {
        Position = position;
        Health = health;
        Bones = bones;
    }

    [MarshalAs(UnmanagedType.Struct)]
    public Vector3 Position;
    [MarshalAs(UnmanagedType.R4)]
    public float Health;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 6)]
    public Vector3[] Bones;
}

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Ansi)]
public struct ResponseEnemyData
{
    // Unmanaged array has size: 50
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 50)]
    public Enemy[] Enemies;
    [MarshalAs(UnmanagedType.I4)]
    public int EnemyCount;
}

// Init unmanaged array
{
    ...
    ResponseEnemyData resp;
    resp.Enemies = new Enemy[50];
    ...
}



public enum CommandID
{
    NONE = 0x1,
    CLOSE_NAMEDPIPE_SERVER,
};

[StructLayout(LayoutKind.Sequential, Pack = 1, CharSet = CharSet.Ansi)]
public struct RequestCommand
{
    [MarshalAs(UnmanagedType.I4)]
    public CommandID CommandID;
}