Troll Fix

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

public class TrolAI_II : MonoBehaviour
{

    // Public variables
    public GameObject           player;
    public Animator             anim; // Animator to animate character behavior
    public List<GameObject>     waypoints = new List<GameObject>();
    public List<GameObject>     TrollEnemies = new List<GameObject>();
    public float                attackRange = 2.0f;
    public float                moveSpeed = 1.0f;
    public float                followSpeed = 1.0f;

    // Private variables
    GameObject TrolEnemy = null;
    int num = 0;


    void Start()
    {
    }

    void Update()
    {
        if (TrollEnemies.Capacity > 0)
        {
            // If there are any enemies on the list, follow the first one
            anim.SetBool("Walk", true);
            Debug.Log("Following enemy");
            float enemyDistance = Vector3.Distance(TrollEnemies[0].gameObject.transform.position, transform.position);
            transform.LookAt((TrollEnemies[0].gameObject.transform.position));
            transform.position += transform.forward * followSpeed * Time.deltaTime;

            // If enemy is in attack range, attack it!
            if (enemyDistance < attackRange)
            {
                Debug.Log( "Attacking enemy!" );
                anim.SetBool("Attack", true);

                // This might not be the best way to do this because it will be called every frame!
                // It's good to remember that you are attacking and do nothing until attack ends, then you resume
                // with following the enemy or attacking it.
            }

        } else {
            // No enemies on the list, just walk around the waypoints...
            Patrol();
        }
    }


    // Link to this method from attack animation so you know when the HIT happens / when the attack ends
    public void OnAttack()
    {
    }


    private void Patrol()
    {
        float dist = Vector3.Distance(transform.position, waypoints[num].transform.position);
        if (dist > 1)
        {
            anim.SetBool("Walk", true);
            transform.LookAt(waypoints[num].transform.position);
            transform.position += transform.forward * moveSpeed * Time.deltaTime;
        }
        else
        {
            num++;
            if( num >= waypoints.Capacity ) num = 0;
        }


    }
    private void OnTriggerEnter(Collider other)
    {
        if (other.tag == "Player")
        {

            TrollEnemies.Add(other.gameObject);
            Debug.Log("aghhhhhh!!!!");
        }
    }

    private void OnTriggerExit(Collider other)
    {
        TrollEnemies.Remove(GameObject.Find(other.name));
    }
}