是否有一个可行的解决方案可以启用/禁用 NavMeshAgent 组件而不丢失 NavMesh？

Question

在开始之前，我先说一下我已经尽力做了功课。

Unity3D 如何连接 NavMesh 和 NavMeshAgent -- 建议我在代理接地后循环组件

        while (!stateManager.cow.isGrounded())
    {
        Debug.Log("Waiting");
        yield return new WaitForEndOfFrame();
    }
    Debug.Log("Did it");
    stateManager.cow.agent.enabled = false;
    stateManager.cow.agent.enabled = true;
    stateManager.cow.agent.SetDestination((Player.instance.gameObject.transform.position - stateManager.cow.gameObject.transform.position).normalized * 5);
    yield return null;

“无法创建 NavAgent”错误，但现在代理的行为就好像我没有给它指定目的地一样。 （世界大小为 750x750，随机距离设置为 100 米，起点为 Vector3.zero，因此我有理由确定 SamplePosition 不是问题，因为所选目的地不可能超出更重要的是，Idle 状态运行相同的 SetDestination() 方法，并输入相同的随机变量，直到 IsBeingAbducted 状态释放 Cow。并且它回到了寻路突然成为问题的地面）

使用 Unity 时收到警告“无法创建代理，因为没有有效的 Navmesh” -- 根本没有答案

unity 中的 NavMeshAgent 无法工作 -- 建议正确烘焙我的网格但是 -

照片显示正确烘焙的 NavMesh 的蓝色覆盖层

另外，我已经查看了 Unity 的 API，但找不到我的错误。

所以这是我正在使用的代码 --

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class BeingAbducted : CowState
{
    public override void EnterState(CattleStateManager stateManager)
    {
        //Debug.Log("Entering BeingAbducted State");

        // Set gravity use to false
        stateManager.cow.rigidBody.useGravity = false;
        // Disable agent control
        stateManager.cow.agent.enabled = false;
        // Set isBeingAbducted to true
        stateManager.cow.isBeingAbducted = true;
        // Set timer for abduction to starting value
        stateManager.cow.abductionTimer = 0.0f;
        // Play the moo hurt sound
        AudioManager.instance.Play(Sounds.HurtMoo_1, stateManager.cow.transform.position);

    }

    public override void UpdateState(CattleStateManager stateManager)
    {
        //Debug.Log("Updating BeingAbducted State");
        // Begin incrementing timer
        stateManager.cow.abductionTimer += Time.deltaTime;
        // Move towards raycast point
        Vector3 newCowPosition = 
        Vector3.MoveTowards(stateManager.cow.gameObject.transform.position, 
        Player.instance.tractorBeam.rayCastOrigin.position, 5 * Time.deltaTime);
        stateManager.cow.agent.baseOffset = newCowPosition.y * 120;
        stateManager.cow.gameObject.transform.position = newCowPosition;
        // suspend in air at set height

        if (stateManager.cow.gameObject.transform.position.y >= 7)
       {
            Vector3 lockedHeightVector = new Vector3(stateManager.cow.gameObject.transform.position.x, 7, stateManager.cow.gameObject.transform.position.z);
            stateManager.cow.gameObject.transform.position = lockedHeightVector;
       }
       // BeginTransition 
    stateManager.cow.skinnedMeshRenderer.material.SetFloat("_DissolveAmount", (stateManager.cow.abductionTimer / stateManager.cow.timeToAbductCow));

        if (stateManager.cow.abductionTimer >= stateManager.cow.timeToAbductCow)
        {
            stateManager.SwitchState(CattleState.Abducted);
        }
    }
    public override void ExitState(CattleStateManager stateManager)
    {
        //Debug.Log("Exiting BeingAbducted State");

        if (stateManager.cow.abductionTimer < stateManager.cow.timeToAbductCow)
        {
            stateManager.cow.skinnedMeshRenderer.material.SetFloat("_DissolveAmount", 0);
            stateManager.cow.rigidBody.useGravity = true;
            stateManager.cow.agent.baseOffset = 0;
        }

    }

    public override void OnCollisionEnter(CattleStateManager stateManager, Collision collision)
    {

    }
}

以及相应的脚本 --

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class RunAway : CowState
{
    public override void EnterState(CattleStateManager stateManager)
    {
        Debug.Log("Entering RunAway State");
        // set agent destination to a random long distance opposite player
        stateManager.StartCoroutine(AgentGrounded(stateManager));
    }

    public override void UpdateState(CattleStateManager stateManager)
    {
        Debug.Log("Updating RunAway State");

        // run the path
        // increase the animation velocity to match the navagent velocity
        // moo a lot
        if (stateManager.cow.agent.isOnNavMesh)
        {
        
stateManager.cow.agent.SetDestination((Player.instance.gameObject.transform.position - stateManager.cow.gameObject.transform.position).normalized * 5);
        }

    }
    public override void ExitState(CattleStateManager stateManager)
    {
        Debug.Log("Exiting RunAway State");
    }

    public override void OnCollisionEnter(CattleStateManager stateManager, Collision collision)
    {

    }

    public IEnumerator AgentGrounded(CattleStateManager stateManager)
    {
        while (!stateManager.cow.isGrounded())
        {
            Debug.Log("Waiting");
            yield return new WaitForEndOfFrame();
        }
        Debug.Log("Did it");
        stateManager.cow.agent.enabled = false;
        stateManager.cow.agent.enabled = true;
        stateManager.cow.agent.SetDestination((Player.instance.gameObject.transform.position - stateManager.cow.gameObject.transform.position).normalized * 5);
        yield return null;
    }
}

所以总而言之，我需要一种方法将牛抬离地面，然后当把它放回地面时，我需要牛逃跑。这是一个简单的 StateMachine 实现，协程存在于静态类中，但由派生自 Monobehavior 的上下文运行。

就像我说的，我尝试的每个问题都会导致相同的错误 - 代理被降低、启用并分配了目的地，但什么也不做。