我正在制作一个游戏，玩家需要能够躲避敌人。当敌人看到我时，它会追随我，但当我在我们之间放置一堵墙时，射线检测会忽略这堵墙，导致敌人仍然继续追随我。我没有使用层，因为我不太理解它们的作用。甚至我也不知道是否应该使用它们。以下是我的敌人AI脚本，用C#编写：

using UnityEngine; using System.Collections;public class EnemyAI : MonoBehaviour { private GameObject playerTarget;private SphereCollider col;public Transform target;public int moveSpeed;public int rotationSpeed;public int maxDistance;private Transform myTransform;public int RayDist;public Vector3 position;public float RayDir;void Start (){    playerTarget = GameObject.FindGameObjectWithTag ("Player");    col = GetComponent<SphereCollider>();    myTransform = transform;    GameObject go = GameObject.FindGameObjectWithTag("Player");    character = GetComponent<CharacterController>();    target = go.transform;      var diagonal = transform.TransformDirection(1, 0, 1);     position = transform.position-transform.right*3;}CharacterController character;void Update(){}void OnTriggerStay (Collider other){    if(other.gameObject == playerTarget)    {           RaycastHit hit;        Vector3 dir = target.position - myTransform.position; dir.y = 0;         Vector3 fwd = transform.TransformDirection(Vector3.forward * RayDist);        if(Physics.Raycast(transform.position, fwd, out hit,10))        {            if (hit.transform.gameObject == playerTarget)            {            Debug.Log ("Raycast entered ");            myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(dir), rotationSpeed * Time.deltaTime);             if (dir.magnitude > maxDistance)             {                 character.Move(myTransform.forward * moveSpeed * Time.deltaTime);             }             }        }        Debug.DrawRay (transform.position, fwd, Color.green);        Vector3 slightright = transform.TransformDirection(new Vector3(RayDir,0,2) * RayDist);        if(Physics.Raycast (transform.position, slightright, out hit, 10)){            if (hit.transform.gameObject == playerTarget)            {            Debug.Log ("slightright Raycast entered");            myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(dir), rotationSpeed * Time.deltaTime);             if (dir.magnitude > maxDistance)             {                 Debug.Log ("Left Raycast move function entered");                character.Move(myTransform.forward * moveSpeed * Time.deltaTime);             }         }        }        Debug.DrawRay (transform.position, slightright, Color.magenta);        Vector3 right = transform.TransformDirection(new Vector3(RayDir,0,1) * RayDist);        if(Physics.Raycast (transform.position, right, out hit, 10)){            if (hit.transform.gameObject == playerTarget)            {            Debug.Log ("Right Raycast entered");            myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(dir), rotationSpeed * Time.deltaTime);             if (dir.magnitude > maxDistance)             {                 character.Move(myTransform.forward * moveSpeed * Time.deltaTime);             }         }        }        Debug.DrawRay (transform.position, right, Color.blue);        Vector3 left = transform.TransformDirection(new Vector3(-RayDir,0,1) * RayDist);        if(Physics.Raycast (transform.position, left, out hit, 10)){            if (hit.transform.gameObject == playerTarget)            {            Debug.Log ("Left Raycast entered");            myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(dir), rotationSpeed * Time.deltaTime);             if (dir.magnitude > maxDistance)             {                 Debug.Log ("Left Raycast move function entered");                character.Move(myTransform.forward * moveSpeed * Time.deltaTime);             }         }        }        Debug.DrawRay (transform.position, left, Color.red);        Vector3 slightleft = transform.TransformDirection(new Vector3(-RayDir,0,2) * RayDist);        if(Physics.Raycast (transform.position, slightleft, out hit, 10)){            if (hit.transform.gameObject == playerTarget)            {            Debug.Log ("Left Raycast entered");            myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(dir), rotationSpeed * Time.deltaTime);             if (dir.magnitude > maxDistance)             {                 Debug.Log ("Left Raycast move function entered");                character.Move(myTransform.forward * moveSpeed * Time.deltaTime);             }         }        }        Debug.DrawRay (transform.position, slightleft, Color.cyan);    }}

}

回答：

你没有检查射线检测击中的对象是否真的是玩家。所以你的代码基本上是说：“如果这个射线检测击中了任何东西，就跟随玩家。”要检查射线检测击中的是哪个对象，只需创建一个RaycastHit对象，并将其作为参数添加到Physics.Raycast调用中。所以你的第一个射线检测应该看起来像这样：

RaycastHit hit;if(Physics.Raycast(transform.position, fwd, out hit ,10)){    if (hit.transform.gameObject == playerTarget)    {        Debug.Log ("Raycast entered ");        myTransform.rotation = Quaternion.Slerp(myTransform.rotation, Quaternion.LookRotation(dir), rotationSpeed * Time.deltaTime);         if (dir.magnitude > maxDistance)         {             character.Move(myTransform.forward * moveSpeed * Time.deltaTime);         }    }}