Why does NavMeshAgent not change destination?

Questions & Answers
1

I needed an AI that would through a series of checkpoints that are empty objects within the game world. Here is the code for the AI, moving through rigidbody.

        public Transform[] checkpoints;
        private int i;
        private NavMeshAgent agent;
        private Rigidbody rb;
    
        [Header("Steering")]
        public float sight;
        public LayerMask layer;
        private bool onYourRight, onYourLeft;
    
        // Start is called before the first frame update
        void Start()
        {
            i = 0;
            agent = GetComponent<NavMeshAgent>();
            rb = GetComponent<Rigidbody>();
            agent.updatePosition = false;
            agent.updateRotation = false;
            agent.SetDestination(checkpoints[0].position);
    
        }
    
        // Update is called once per frame
        void Update()
        {
           if (agent.pathStatus == NavMeshPathStatus.PathComplete)
           {
              Debug.Log("YOU REACHED IT");
              i++;
              Debug.Log(i);
              this.agent.SetDestination(checkpoints*.position);*

}
}

private void FixedUpdate()
{
rb.velocity = agent.velocity;
agent.nextPosition = rb.position;
}
It should hit that if statement in Update() and move to the next checkpoint in the array. And yet it doesn’t. Why? What am I not seeing? What did I do wrong?
Please answer, this has been troubling me for the past hour.
----------
Update:
I diagnosed the problem in this. The agent skyrockets i to the last index so there is no where else to go. Changed update() to:
if (i < checkpoints.Length)
{
if (this.rb.position == checkpoints*.position)*
{
Debug.Log(“YOU REACHED IT”);
i++;
Debug.Log(i);
this.agent.SetDestination(checkpoints*.position);*
}
}
But now I got a new problem. It never goes to the next index.

2

Why are you mixing Rigidbody to this? Try taking out the FixedUpdate part of the code.

Also to check if Agent has reached the destination use (agent.remainingDistance <= agent.stoppingDistance). You can also try to set stoppingDistance a little over 0.

Here is simplified version (this assumes you set the Agent in the Inspector):

public class MoveTest : MonoBehaviour
{    
    public Transform[] checkpoints;
    public NavMeshAgent agent;
    int i;
    void Start()
    {
        i = 0;
        agent.SetDestination(checkpoints[0].position);
    }
    
    void Update()
    {
        if (i >= checkpoints.Length) return;
        if (agent.remainingDistance <= agent.stoppingDistance)
        {
            Debug.Log("YOU REACHED IT");
            Debug.Log(i);
            if (++i < checkpoints.Length) this.agent.SetDestination(checkpoints*.position); else agent.ResetPath();*

}
}
}