Netcode tutorial doesn't handle multiple MainEntityCamera from different clients but uses HasSingleton<MainEntityCamera>

[brian-mpg]

If you follow the directions in https://github.com/Unity-Technologies/CharacterControllerSamples/blob/master/_Documentation/Tutorial/tutorial-netcodecharacters.md

Everything works in the editor fine, that is until a second client connects. That's when that world creates a 2nd MainEntityCamera entity and the MainCameraSystem breaks.

Considering it's a tutorial for netcode it should be assumed it's for multiplayer and multiple clients.

[Gaudon]

[UpdateInGroup(typeof(PresentationSystemGroup))]
public partial class MainCameraSystem : SystemBase
{
    private Entity _mainCameraEntity;
    private bool _initialized;
    protected override void OnUpdate()
    {
        if (!_initialized)
        {
            Initialize();
        }
        else
        {
            LocalToWorld targetLocalToWorld = SystemAPI.GetComponent<LocalToWorld>(_mainCameraEntity);
            MainGameObjectCamera.Instance.transform.SetPositionAndRotation(targetLocalToWorld.Position, targetLocalToWorld.Rotation);
        }
    }

    private void Initialize()
    {
        foreach (var (mainCameraEntity, entity) in SystemAPI.Query<RefRO<MainEntityCamera>>().WithAll<GhostOwnerIsLocal>().WithEntityAccess())
        {
            _mainCameraEntity = entity;
            _initialized = true;
        }
    }
}

I modified the default MainCameraSystem.cs file in this way to get around it. Seems to work fine for me in the short term.