operator !=(NavWorld, NavWorld)
Checks whether two NavWorld values refer to different underlying NavMesh worlds.
Read time 2 minutesLast updated a month ago
Definition
- Type: Operator
- Namespace: Unity.AI.Navigation.LowLevel
- Assembly: UnityEngine.AIModule
public static bool operator !=(NavWorld left, NavWorld right)
Parameters
Returns
Type | Description |
|---|---|
| bool | |
Remarks
This operator is a syntactic shortcut equivalent to negating the result of NavWorld.Equals. Use it inside expressions where the syntax is more concise than an explicit method call. Two NavWorld values are different when they point to separate internal navigation systems.
!=Examples
using UnityEngine;using UnityEngine.AI;using Unity.AI.Navigation.LowLevel;public class NavWorldEqualityExample : MonoBehaviour{ NavWorld m_World; int m_CachedWorldHash; void OnEnable() { m_World = NavWorld.GetDefaultWorld(); m_CachedWorldHash = m_World.GetHashCode(); Debug.Log($"Cached the NavMesh world hash {m_CachedWorldHash}"); CompareNavigationWorldToPrevious(); // Destroying all the data makes every existing handle to the old world invalid. NavMesh.RemoveAllNavMeshData(); Debug.Log($"Removed all NavMesh data."); //m_CachedWorldHash = m_World.GetHashCode(); //Debug.Log($"Cached the NavMesh world, hash {m_CachedWorldHash}"); CompareNavigationWorldToPrevious(); } public void CompareNavigationWorldToPrevious() { NavWorld currentWorld = NavWorld.GetDefaultWorld(); // Equals, == and != compare the underlying navigation system rather than the struct // copy, so two handles obtained from the same world always compare equal. if (currentWorld == m_World) { Debug.Log($"The navigation world is the same as before."); // The handles are interchangeable, so keep one and release the duplicate. currentWorld.Dispose(); return; } Debug.Log($"The world was re-created: hash {m_CachedWorldHash} became {currentWorld.GetHashCode()}"); // Release the stale handle before replacing it, otherwise its safety handle leaks. m_World.Dispose(); m_World = currentWorld; m_CachedWorldHash = m_World.GetHashCode(); } void OnDisable() { m_World.Dispose(); }}