using System.Collections;using System.Collections.Generic;using UnityEngine;public class ModelDrages : MonoBehaviour {//發(fā)射射線的攝像機(jī)private Camera cam;//射線碰撞的物體private GameObject go;//射線碰撞物體的名字public static string btnName;private Vector3 screenSpace;private Vector3 offset;private bool isDrage = false;// Use this for initializationvoid Start (){ cam = Camera.main;}// Update is called once per frame void Update (){ //整體初始位置 Ray ray = cam.ScreenPointToRay(Input.mousePosition); //從攝像機(jī)發(fā)出到點(diǎn)擊坐標(biāo)的射線 RaycastHit hitInfo; if (isDrage == false) {  if(Physics .Raycast (ray,out hitInfo))  {   //劃出射線 只有在Scene視圖中才能看到   Debug.DrawLine(ray.origin, hitInfo.point);   go = hitInfo.collider.gameObject;   print(btnName);   screenSpace = cam.WorldToScreenPoint(go.transform.position);   offset = go.transform.position - cam.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, Input.mousePosition.z));   //物體的名字   btnName = go.name;   //組件的名字  }  else  {   btnName = null;  } } if(Input.GetMouseButton(0)) {  Vector3 currentScreenSpace = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenSpace.z);  Vector3 currentPosition = cam.ScreenToWorldPoint(currentScreenSpace) + offset;  if (btnName != null)  {   go.transform.position = currentPosition;  }  isDrage = true; } else {  isDrage = false; } }}