Quaternion.FromToRotation 从from到to旋转

static function FromToRotation (fromDirection : Vector3, toDirection : Vector3) : Quaternion

Description描述

Creates a rotation which rotates from fromDirection to toDirection.

从fromDirection到toDirection创建一个旋转。

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.

通常你使用这个旋转一个变换的其中一个轴，例如，在世界空间，y轴跟随一个目标方向toDirection。

using UnityEngine;
using System.Collections;

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

// Sets the rotation so that the transform's y-axis goes along the z-axis
//设置旋转，变换的y轴转向z轴

transform.rotation = Quaternion.FromToRotation (Vector3.up, transform.forward);