座標間の角度

Example.cs

using UnityEngine;

public class Example : MonoBehaviour
{
    public Transform from = null;
    public Transform to = null;
    
    private void Update ()
    {
        // fromをtoへ向ける
        Quaternion rotation = Quaternion.LookRotation (to.position - from.position);
        to.rotation = rotation;
    }
}