Unity鼠标拖拽物体

<pre name="code" class="csharp">using UnityEngine;using System;using System.Collections;// 创建一个Cube 将该代码拖拽给Cube然后运行，点击Cube然后拖拽Cube，//Cube会被鼠标拖拽移动// 注意 ： 创建的 Cube 默认带有一个 Box Collider 碰撞盒， //如果拖拽对象上没有 碰撞盒， 则不能被检测到拖拽 public class Test : MonoBehaviour{    Transform myTransform;    Vector3 selfScenePosition;    void Start()    {        myTransform = transform;        //将自身坐标转换为屏幕坐标        selfScenePosition = Camera.main.WorldToScreenPoint(myTransform.position);         print("scenePosition   :  " + selfScenePosition);    }    void OnMouseDrag() //鼠标拖拽时系统自动调用该方法    {        //获取拖拽点鼠标坐标        print(Input.mousePosition.x + "     y  " + Input.mousePosition.y + "     z  " + Input.mousePosition.z);        //新的屏幕点坐标        Vector3 currentScenePosition = new Vector3(Input.mousePosition.x, Input.mousePosition.y, selfScenePosition.z);        //将屏幕坐标转换为世界坐标        Vector3 crrrentWorldPosition = Camera.main.ScreenToWorldPoint(currentScenePosition);         //设置对象位置为鼠标的世界位置        myTransform.position = crrrentWorldPosition;    }    void OnMouseDrag()    {        print("鼠标拖动该模型区域时");    }    void OnMouseDown()    {        print("鼠标按下时");    }    void OnMouseUp()    {        print("鼠标抬起时");    }    void OnMouseEnter()    {        print("鼠标进入该对象区域时");    }    void OnMouseExit()    {        print("鼠标离开该模型区域时");    }}