Assets/Code/Scripts/Interaction/PressurePlateButton.cs

@@ -20,6 +20,7 @@ public class PressurePlateButton : MonoBehaviour
     public UnityEvent OnReleased;
 
     private readonly HashSet<Collider> m_validCollidersOnPlate = new HashSet<Collider>();
+    private readonly HashSet<Collider> m_stayedThisPhysicsFrame = new HashSet<Collider>();
     private bool m_isPressed;
 
     private void Reset()
@@ -42,8 +43,16 @@ public class PressurePlateButton : MonoBehaviour
         }
     }
 
+    private void OnTriggerStay(Collider other)
+    {
+        if (IsValidActivator(other))
+            m_stayedThisPhysicsFrame.Add(other);
+    }
+
     private void OnTriggerExit(Collider other)
     {
+        m_stayedThisPhysicsFrame.Remove(other);
+
         if (!m_validCollidersOnPlate.Remove(other))
             return;
 
@@ -54,6 +63,26 @@ public class PressurePlateButton : MonoBehaviour
         }
     }
 
+    private void FixedUpdate()
+    {
+        if (m_validCollidersOnPlate.Count == 0)
+        {
+            m_stayedThisPhysicsFrame.Clear();
+            return;
+        }
+
+        m_validCollidersOnPlate.RemoveWhere(c => c == null || !c.enabled || !c.gameObject.activeInHierarchy);
+
+        m_validCollidersOnPlate.IntersectWith(m_stayedThisPhysicsFrame);
+        m_stayedThisPhysicsFrame.Clear();
+
+        if (m_validCollidersOnPlate.Count == 0 && m_isPressed)
+        {
+            m_isPressed = false;
+            OnReleased?.Invoke();
+        }
+    }
+
     private bool IsValidActivator(Collider other)
     {
         if (((1 << other.gameObject.layer) & detectionMask) == 0)