quantum-space-buddies/QSB/Player/PlayerMapMarker.cs

using UnityEngine;

namespace QSB.Player
{
	public class PlayerMapMarker : MonoBehaviour
	{
		public string PlayerName;
		private Transform _playerTransform;
		private CanvasMapMarker _canvasMarker;
		private bool _canvasMarkerInitialized;

		public void Awake()
		{
			GlobalMessenger.AddListener("EnterMapView", new Callback(OnEnterMapView));
			GlobalMessenger.AddListener("ExitMapView", new Callback(OnExitMapView));
		}

		public void Start()
		{
			enabled = false;
			_playerTransform = Locator.GetPlayerTransform();
		}

		public void OnDestroy()
		{
			GlobalMessenger.RemoveListener("EnterMapView", new Callback(OnEnterMapView));
			GlobalMessenger.RemoveListener("ExitMapView", new Callback(OnExitMapView));
		}

		public void InitMarker()
		{
			var obj = GameObject.FindWithTag("MapCamera");
			var markerManager = obj.GetRequiredComponent<MapController>().GetMarkerManager();
			_canvasMarker = markerManager.InstantiateNewMarker(true);
			var component = GetComponent<OWRigidbody>();
			if (component != null)
			{
				markerManager.RegisterMarker(_canvasMarker, component);
			}
			else
			{
				markerManager.RegisterMarker(_canvasMarker, transform);
			}

			_canvasMarker.SetLabel(PlayerName.ToUpper());
			_canvasMarker.SetColor(Color.white);
			_canvasMarker.SetVisibility(false);
			_canvasMarkerInitialized = true;
		}

		private void OnEnterMapView() => enabled = true;
		private void OnExitMapView() => enabled = false;

		public void LateUpdate()
		{
			if (!_canvasMarkerInitialized)
			{
				InitMarker();
			}

			var a = Locator.GetActiveCamera().WorldToScreenPoint(transform.position);
			var b = Locator.GetActiveCamera().WorldToScreenPoint(_playerTransform.position);
			var vector = a - b;
			vector.z = 0f;
			var flag = a.z > 0f;
			if (_canvasMarker.IsVisible() != flag)
			{
				_canvasMarker.SetVisibility(flag);
			}
		}
	}
}