Quaternion.LookRotation

Quaternion.LookRotation

public static Quaternion LookRotation(Vector3 forward, Vector3 upwards = Vector3.up);

Parameters

forward	The direction to look in.
upwards	The vector that defines in which direction up is.

Description

Creates a rotation with the specified forward and upwards directions.

Z axis will be aligned with forward, X axis aligned with cross product between forward and upwards, and Y axis aligned with cross product between Z and X.

Returns identity if forward or upwards magnitude is zero.
Returns identity if forward and upwards are colinear.

// You can also use transform.LookAtusing UnityEngine;
using System.Collections;public class ExampleClass : MonoBehaviour
{
    public Transform target;    void Update()
    {
        Vector3 relativePos = target.position - transform.position;        // the second argument, upwards, defaults to Vector3.up
        Quaternion rotation = Quaternion.LookRotation(relativePos, Vector3.up);
        transform.rotation = rotation;
    }
}