improve portal collider to prevent unwanted teleportation

Assets/Portal/Runtime/PortalCollider.cs

@@ -0,0 +1,42 @@
+using EscapeRoomEngine.Engine.Runtime.Utilities;
+using NaughtyAttributes;
+using UnityEngine;
+
+namespace EscapeRoomEngine.Portal.Runtime
+{
+    [RequireComponent(typeof(Collider))]
+    public class PortalCollider : MonoBehaviour
+    {
+        [BoxGroup("Internal")] [SerializeField] private Portal portal;
+        
+        private void Awake()
+        {
+            // check whether the collider is set up correctly
+            if (!GetComponent<Collider>().isTrigger) throw new EngineException("Collider must be a trigger.");
+        }
+
+        private void OnTriggerEnter(Collider other)
+        {
+            if (portal.Connected)
+            {
+                var portalDriver = other.GetComponent<PortalDriver>();
+                if (portalDriver && !portal.closePortalDrivers.Contains(portalDriver))
+                {
+                    portal.StartTrackingDriver(portalDriver, portal.CalculateSide(portalDriver.transform));
+                }
+            }
+        }
+
+        private void OnTriggerExit(Collider other)
+        {
+            if (portal.Connected)
+            {
+                var portalDriver = other.GetComponent<PortalDriver>();
+                if (portalDriver)
+                {
+                    portal.StopTrackingDriver(portalDriver);
+                }
+            }
+        }
+    }
+}