Question How can I make my enemy AI stop shooting the player if they are behind the wall?

I am pretty new to unity and now working with enemy AI for my game. I made some progress and added attack, chase and patroling states but now I am stuck with one issue where enemy tries to shoot through walls. Is there any way to fix this? Here is my enemy AI script:

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.AI;
3.  
4. public class EnemyAi : MonoBehaviour
5. {
6.     public NavMeshAgent agent;
7.  
8.     public Transform player;
9.  
10.     public LayerMask whatIsGround, whatIsPlayer;
11.  
12.     public int maxHealth;
13.     public int currentHealth;
14.     Ragdoll ragdoll;
15.     public bool isDead;
16.  
17.     //Patroling
18.     public Vector3 walkPoint;
19.     bool walkPointSet;
20.     public float walkPointRange;
21.  
22.     //Attacking
23.     public float timeBetweenAttacks;
24.     bool alreadyAttacked;
25.     public GameObject projectile;
26.     public Transform projectilePos;
27.  
28.     //States
29.     public float sightRange, attackRange;
30.     public bool playerInSightRange, playerInAttackRange;
31.  
32.     Animator animator;
33.  
34.     private void Awake()
35.     {
36.         currentHealth = maxHealth;
37.         player = GameObject.Find("Player").transform;
38.         agent = GetComponent<NavMeshAgent>();
39.         animator = GetComponent<Animator>();
40.         ragdoll = GetComponent<Ragdoll>();
41.     }
42.  
43.     private void Update()
44.     {
45.         //Check for sight and attack range
46.         playerInSightRange = Physics.CheckSphere(transform.position, sightRange, whatIsPlayer);
47.         playerInAttackRange = Physics.CheckSphere(transform.position, attackRange, whatIsPlayer);
48.  
49.         if (!playerInSightRange && !playerInAttackRange) Patroling();
50.         if (playerInSightRange && !playerInAttackRange) ChasePlayer();
51.         if (playerInAttackRange && playerInSightRange) AttackPlayer();
52.  
53.         animator.SetFloat("Speed", agent.velocity.magnitude);
54.     }
55.  
56.     private void Patroling()
57.     {
58.         if (!walkPointSet) SearchWalkPoint();
59.  
60.         if (walkPointSet) agent.SetDestination(walkPoint);
61.  
62.         Vector3 distanceToWalkPoint = transform.position - walkPoint;
63.  
64.         //Walkpoint reached
65.         if (distanceToWalkPoint.magnitude < 0.1f) walkPointSet = false;
66.     }
67.  
68.     private void SearchWalkPoint()
69.     {
70.         //Calculate random point in range
71.         float randomZ = Random.Range(-walkPointRange, walkPointRange);
72.         float randomX = Random.Range(-walkPointRange, walkPointRange);
73.  
74.         walkPoint = new Vector3(transform.position.x + randomX, transform.position.y, transform.position.z + randomZ);
75.  
76.         if (Physics.Raycast(walkPoint, -transform.up, 2f, whatIsGround)) walkPointSet = true;
77.     }
78.  
79.     private void ChasePlayer()
80.     {
81.         agent.SetDestination(player.position);
82.     }
83.  
84.     private void AttackPlayer()
85.     {
86.         //Make sure enemy doesn't move
87.         agent.SetDestination(transform.position);
88.  
89.         transform.LookAt(player);
90.  
91.         if (!alreadyAttacked)
92.         {
93.             //Attack code here
94.             Rigidbody rb = Instantiate(projectile, projectilePos.position, projectilePos.rotation).GetComponent<Rigidbody>();
95.             rb.AddForce(transform.forward * 32f, ForceMode.Impulse);
96.             rb.AddForce(transform.up * 0f, ForceMode.Impulse);
97.             animator.SetTrigger("Shoot");
98.  
99.             alreadyAttacked = true;
100.             Invoke(nameof(ResetAttack), timeBetweenAttacks);
101.         }
102.     }
103.  
104.     private void ResetAttack()
105.     {
106.         alreadyAttacked = false;
107.     }
108.  
109.     public void TakeDamage(int damage)
110.     {
111.         currentHealth -= damage;
112.         if (currentHealth <= 0)
113.         {
114.             Die();
115.         }
116.     }
117.  
118.     private void Die()
119.     {
120.         isDead = true;
121.  
122.         EnemyAi enemyMovement = GetComponent<EnemyAi>();
123.         NavMeshAgent enemyMovement2 = GetComponent<NavMeshAgent>();
124.         if (enemyMovement != null)
125.         {
126.             enemyMovement.enabled = false;
127.             enemyMovement2.enabled = false;
128.         }
129.  
130.  
131.         ragdoll.ActivateRagdoll();
132.         Invoke("Delay", 5f);
133.     }
134.  
135.     private void Delay()
136.     {
137.         Destroy(gameObject);
138.     }
139. }

 

After the player is nearby, you also need to raycast to him. And if the ray did not collide with the player, then there is a wall between you.