Version: 2018.1
public static Quaternion FromToRotation (Vector3 fromDirection, Vector3 toDirection);


Creates a rotation which rotates from fromDirection to toDirection.

Usually you use this to rotate a transform so that one of its axes eg. the y-axis - follows a target direction toDirection in world space.

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { void Example() { transform.rotation = Quaternion.FromToRotation(Vector3.up, transform.forward); } }