Enemy AI patrols between points Script

Guard AI part 2

In this article we will make our guard move between waypoints.

Guard Patrol between Waypoints Pseudocode/logic

if waypoints exist .count > 0 && currenttarget != null

check distance between guard and destination
if the distance is less than 1 unit

if currenttarget == waypoints.count
turn on reverse
if currenttarget == 0
turn off reverse

if reverse is off increment currenttarget
if reverse is on then decrease currenttarget

set destination to current target

Guard Patrol between Waypoints Code

private NavMeshAgent _agent;
public List<Transform> waypoints;
private int currentTarget = 0;
private bool _isReverse = false;
void Start ()
{
    _agent = GetComponent<NavMeshAgent>();
}
 
void Update ()
{
    if (waypoints.Count > 0 && waypoints[currentTarget] != null)
    {
        float distance = Vector3.Distance(transform.position, waypoints[currentTarget].position);
        if (distance < 1)
        {
            if (currentTarget >= waypoints.Count - 1)
            {
                _isReverse = true;
            }
            else if (currentTarget <= 0)
            {
                _isReverse = false;
            }
            if (_isReverse == true)
            {
                currentTarget--;
            }
            else if (_isReverse == false)
            {
                currentTarget++;
            }
        }
        _agent.SetDestination(waypoints[currentTarget].position);
   }
}