Quaternion.AngleAxis

public static Quaternion AngleAxis (float angle, Vector3 axis);

説明

axis の周りを angle 度回転する回転を作成します。

using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour {
    void Example() {
        transform.rotation = Quaternion.AngleAxis(30, Vector3.up);
    }
}