How to prevent a NavMeshAgent to constantly spin along its y axis?

Questions & Answers
1

I did this C# script and attached to my NPC, which is supposed to continuously patrol a maze. The agent seems to move correctly from one point to another, but sometimes, while changing its direction, it starts to spin along its y axis without stopping! I would like to prevent this behavior butI don’t know what it’s going wrong. This is the code of my script:

using UnityEngine;
using UnityEngine.AI;
using System.Collections;


public class MyChase : MonoBehaviour {

	public Transform[] points;
	private Transform play;
	private int destPoint = 0;
	private NavMeshAgent agent;
	private GameObject pointsHolder;
	private int numOfPoints;
	Animator anim;

	void Start () {
		agent = GetComponent<NavMeshAgent>();
		play = GameObject.FindWithTag("Player").transform;
		anim = GetComponent<Animator> ();

		agent.autoBraking = false;

		pointsHolder = GameObject.FindGameObjectWithTag("PatrolPath");
		numOfPoints = pointsHolder.transform.childCount;
		points = new Transform[numOfPoints];

		for (int t = 0; t < numOfPoints; t++) {
			points [t] = pointsHolder.transform.GetChild (t).transform;
		}


		GotoNextPoint();
	}


	void GotoNextPoint() {

		if (points.Length == 0)
			return;

		agent.destination = points[destPoint].position;

		destPoint = (destPoint + 1) % points.Length;
	}


	void Update () {

		if (!agent.pathPending && agent.remainingDistance < 0.5f)
			GotoNextPoint();
	}
}

P.s.: I have to add the animation after solving this problem, if you’re asking to yourself why I’ve declared an animator object.

2

Add a rigid body to the object and add a constraint to the y rotation.