鼠标坐标转换成世界坐标

using UnityEngine;using System.Collections;public class shubiao : MonoBehaviour {RaycastHit hitt = new RaycastHit();// Use this for initializationvoid Start () {}// Update is called once per framevoid Update () {Ray ray = camera.ScreenPointToRay(Input.mousePosition);Physics.Raycast(ray,out hitt);Debug.Log(hitt.point.x);}}