IsNull()

Determines whether this NavNode is empty of any information.

읽는 시간 1분

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Definition

Type: Method
Namespace: Unity.AI.Navigation.LowLevel
Assembly: UnityEngine.AIModule


public readonly bool IsNull()

Returns

Type	Description
bool	`true` if the NavNode has been created empty and has never pointed to any node in the NavMesh, or `false` otherwise.

Remarks

A null NavNode is the default value of the struct and represents the absence of a reference to any node. This is distinct from a NavNode that once referenced a real node that has since been removed; in that case NavNode.IsNull still returns false. Use NavWorld.IsValid to check whether a non-null node is currently active in the NavMesh.

Examples


using UnityEngine;using Unity.AI.Navigation.LowLevel;public class NavNodeIsNullExample : MonoBehaviour{    NavNode m_Stored;    void Update()    {        // Default-initialized NavNode values are null until you assign one from a NavWorld query.        if (m_Stored.IsNull())        {            using NavWorld world = NavWorld.GetDefaultWorld();            NavLocation location = world.MapLocation(transform.position, Vector3.one, 0);            if (world.IsValid(location))                m_Stored = location.node;        }    }}

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