TigerProject/Assets/Monster/FlyEnemyMovement.cs

using UnityEngine;
using UnityEngine.AI;

public class FlyEnemyMovement : Entity
{
    private GameObject playerObject;
    private NavMeshAgent agent;

    [SerializeField] private float detectionRange = 5.0f; 
    [SerializeField] private float EnemyTime;

    private void Awake()
    {
        agent = GetComponent<NavMeshAgent>();
        agent.updateRotation = false;
        agent.updateUpAxis = false;
    }

    private void Start()
    {
        playerObject = GameObject.FindWithTag("Player");
    }

    public override void RunAI()
    {
        if (playerObject != null)
        {
            float distance = Vector3.Distance(transform.position, playerObject.transform.position);

            if (distance <= detectionRange)
            {
                SetAgentPosition(); 
            }
            else
            {
                if (!agent.isStopped)
                {
                    agent.ResetPath();
                }
            }
        }
    }

    private void SetAgentPosition()
    {
        if (!agent.isActiveAndEnabled || !agent.isOnNavMesh)
        {
            return;
        }

        Vector3 targetPos = playerObject.transform.position;
        agent.SetDestination(new Vector3(targetPos.x, targetPos.y));
    }

    private void OnDrawGizmosSelected()
    {
        Gizmos.color = Color.red;
        Gizmos.DrawWireSphere(transform.position, detectionRange);
    }
}