using UnityEngine; using System.Collections;  public class cameramove : MonoBehaviour {      private Vector3 world;      private float speed = 0;//物體移動的速度      // Use this for initialization     void Start()     {         world.x = -2;         world.y = 0;         world.z = 6;     }      // Update is called once per frame     void Update()     {         Vector2 screenpos = Camera.main.WorldToScreenPoint(transform.position);//物體的世界坐標轉化成屏幕坐標         Vector3 e = Input.mousePosition;//鼠標的位置                   //當點擊鼠標中鍵時          if (Input.GetMouseButtonDown(2))         {             //e.z=screenpos.z;//1.因為鼠標的屏幕 Z 坐標的默認值是0，所以需要一個z坐標             //e.z=1;//將鼠標             //攝像機要垂直于x-z平面             //world=Camera.main.ScreenToWorldPoint(e);             world = new Vector3(Input.mousePosition.x/Screen.width,Input.mousePosition.y/Screen.height,106f );             Vector3 world1= Camera.main.ViewportToWorldPoint(new Vector3(world.x, world.y, 106f));             //world.x = Camera.main.ScreenToWorldPoint(Input.mousePosition).x;             //world.z = Camera.main.ScreenToWorldPoint(Input.mousePosition).y;             //world.y = transform.position.y;              print("new x:" + world.x);             print("new y:" + world.y);             print("new z:" + world.z);              //創建物體             //GameObject goNew = GameObject.CreatePrimitive(PrimitiveType.Sphere);             //goNew.transform.position = world1;             transform.LookAt(world1);         }     } } 

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