koobas.hobune.stream
Looping Between Waypoints
While putting together my own AI mostly from scratch, I've hit a bump in the patrol state I have setup. After reaching one waypoint, my AI won't continue to the next one, despite being quite sure that my conditions to set the next point trigger and that I set the next one properly. I'll copy the piece of code in question below:
public override void Update(enemyAI_FSM enemy)
{
// Check how close the enemy is to the player
if (enemy.distance <= enemy.lookRadius)
{
enemy.TransitionToState(enemy.ShootState);
}
// If the Waypoint Index is set to less than or equal to the total number of waypoints, start moving toward the currently selected waypoint
if (waypointIdx <= enemy.waypointList.Length && pointDistance > enemy.stopDistance)
{
enemy.transform.position = Vector3.MoveTowards(enemy.transform.position, currentPoint.transform.position, enemy.moveSpeed * Time.deltaTime);
}
// Then check if the waypoint has been reached, and select the next one
else if (pointDistance <= enemy.stopDistance)
{
Debug.Log("Waypoint reached");
if (waypointIdx < enemy.waypointList.Length)
{
waypointIdx++;
}
else if (waypointIdx >= enemy.waypointList.Length)
{
waypointIdx = 0;
}
currentPoint = enemy.waypointList[waypointIdx];
}
}
So, is there something obvious I'm missing? Thank you to anyone who can help
Where do you set pointDistance? Are you sure this is updating properly?
Now that you mention it, I see that issue. I had it in my EnterState method. It wasn't updating at all. I even made this mistake once already
I don't know what the pointDistance is? But most probably it was the issue as pointDistance > enemy.stopDistance is always set to be true in that if condition. The else if part never gets executed. I copy-pasted your code in unity and modified it a bit (because I didn't have all the variables and it's values)
public class WaypointScript : MonoBehaviour
{
private int waypointIdx = 0;
public Transform[] waypointList;
private float stopDistance = 3, moveSpeed = 10; //i am assuming stopDistance is the distance from your waypoint where the waypointIdx should update
private Transform currentPoint;
private void Start()
{
currentPoint = waypointList[0];
}
private void Update()
{
if (waypointIdx <= waypointList.Length)
{
transform.position = Vector3.MoveTowards(transform.position, currentPoint.transform.position, moveSpeed * Time.deltaTime);
if (Vector3.Distance(transform.position, waypointList[waypointIdx].transform.position) <= stopDistance)
{
Debug.Log("Waypoint reached");
Debug.Log(waypointIdx);
if (waypointIdx < waypointList.Length - 1)
{
waypointIdx++;
}
else if (waypointIdx >= waypointList.Length - 1)
{
waypointIdx = 0;
}
currentPoint = waypointList[waypointIdx];
}
}
}
}
I Tested the code. It works like a charm. I hope it helps a bit.
Keep learning :)
