Unity3D做二维游戏时，物体跟随鼠标的脚本

烟雨

1. Vector3 screenPosition;//将物体从世界坐标转换为屏幕坐标
   
2. Vector3 mousePositionOnScreen;//获取到点击屏幕的屏幕坐标
   
3. Vector3 mousePositionInWorld;//将点击屏幕的屏幕坐标转换为世界坐标
   
4. public void TureMouseFollow()
   
5. {
   
6.     //获取鼠标在相机中（世界中）的位置，转换为屏幕坐标；
   
7.     screenPosition = Camera.main.WorldToScreenPoint(transform.position);
   
8.     //获取鼠标在场景中坐标
   
9.     mousePositionOnScreen = Input.mousePosition;
   
10.     //让场景中的Z=鼠标坐标的Z
    
11.     mousePositionOnScreen.z = screenPosition.z;
    
12.     //将相机中的坐标转化为世界坐标
    
13.     mousePositionInWorld = Camera.main.ScreenToWorldPoint(mousePositionOnScreen);
    
14.     //物体跟随鼠标移动
    
15.     transform.position = mousePositionInWorld;
    
16.     //物体跟随鼠标X轴移动
    
17.     // transform.position = new Vector3(mousePositionInWorld.x, transform.position.y, transform.position.z);
    
18. }

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