目標地点に近づいたら、目標地点を更新する

SimpleLookat.cs

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

public class SimpleLookat : MonoBehaviour {

	// ゴール
	[SerializeField] List<Transform> targets;

	// カーソル
	[SerializeField] Transform cursor;

	IEnumerator<Transform> currentTargets;

	Quaternion offsetRotation;

	void Start()
	{
		currentTargets = targets.GetEnumerator();
		currentTargets.MoveNext ();
	}

	// Update is called once per frame
	void Update () 
	{
		if (Vector3.Distance (transform.position, currentTargets.Current.position) < 3) {
			currentTargets.MoveNext ();
		}
		cursor.LookAt (currentTargets.Current);
	}
}