Why is part of my script not showing up for my enemy AI?

Questions & Answers
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1

Hi all, struggling to work out the reason as to why my code is not doing what it does in the tutorial I watched

In the tutorial, he puts the layermasks on the enemy AI called WhatIsPlayer and WhatIsGround; however, they don’t show up as options for mine. I’m fairly sure it’s the reason why my script isn’t working as someone suggested on a previous post.

Any help would be appreciated! Thanks!

using UnityEngine;
using UnityEngine.AI;

public class EnemyAI : MonoBehaviour
{
    public NavMeshAgent agent;

    public Transform player;

    public LayerMask whatIsGround, whatIsPlayer;

    //patrolling
    public Vector3 walkPoint;
    bool walkPointSet;
    public float walkPointRange;

    //attacking
    public float timeBeteenAttacks;
    bool alreadyAttacked;

    //states
    public float sightRange, attackRange;
    public bool playerInSightRange, playerInAttackingRange;

    private void Awake()
    {
        player = GameObject.Find("Player").transform;
        agent = GetComponent<NavMeshAgent>();
    }

    private void Update()
    {
        //check for sight and attack range
        playerInSightRange = Physics.CheckSphere(transform.position, sightRange, whatIsPlayer);
        playerInAttackingRange = Physics.CheckSphere(transform.position, attackRange, whatIsPlayer);

        if (!playerInSightRange && !playerInAttackingRange) Patrolling();
        if (playerInSightRange && !playerInAttackingRange) ChasePlayer();
        if (playerInAttackingRange && playerInSightRange) AttackPlayer();
    }

    private void Patrolling()
    {
        if (!walkPointSet) SearchWalkPoint();

        if (walkPointSet)
            agent.SetDestination(walkPoint);
        Vector3 distanceToWalkPoint = transform.position - walkPoint;

        //walkpoint reached
        if (distanceToWalkPoint.magnitude < 1f)
            walkPointSet = false;
    }

    private void SearchWalkPoint()
    {
        //calculate random point in range
        float randomZ = Random.Range(-walkPointRange, walkPointRange);
        float randomX = Random.Range(-walkPointRange, walkPointRange);

        walkPoint = new Vector3(transform.position.x + randomX, transform.position.y, transform.position.z + randomZ);

        if(Physics.Raycast(walkPoint, -transform.up, 2f, whatIsGround))
            walkPointSet = true;
    }

    private void ChasePlayer()
    {
        agent.SetDestination(player.position);
    }

    private void AttackPlayer()
    {
        //make sure enemy doesn't move
        agent.SetDestination(transform.position);

        transform.LookAt(player);

        if (!alreadyAttacked)
        {

            alreadyAttacked = true;
            Invoke(nameof(ResetAttack), timeBeteenAttacks);
        }

    }
    private void ResetAttack()
    {
        alreadyAttacked = false;
    }
}

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2

You have to manually create two layers in the Editor. One for the ground, and one for the player.

  1. Select a GameObject, select the Layer drop-down in the Inspector
    window, and select Add Layer from the menu.
  2. Enter two new layer names. One to be used for ground, and one two be used for the player. You can name these whatever you’d like.
  3. Select the ground gameObject, select the Layer drop-down in the Inspector
    window, choose the layer for the ground.
  4. Do the same for the player

Now in the “What Is Ground” and “What is Player” drop-downs, you should see the two layers you’ve just created.