鼠标拖动克隆无限克隆

Question

因此，我正在制作一个马里奥制造商“克隆”，我希望它实例化对象，当我举行控制和拖动。它使几乎无限的瓷砖。如果新位置与对象的旧位置相同，我希望它只生成一个对象。一切由1块

public GameObject tilePrefab; 

     void OnMouseDrag(){ 
     Vector2 pos = Input.mousePosition; 
     pos = Camera.main.ScreenToWorldPoint (pos); 
     pos.x = Mathf.Round(pos.x); 
     pos.y = Mathf.Round(pos.y); 
     transform.position = pos; 
     if (Input.GetKey (KeyCode.LeftControl)) { 
      if (transform.position != GameObject.Find ("SomePrefabName").transform.position) { 
       GameObject myGameObject = Instantiate (tilePrefab) as GameObject; 
       myGameObject.name = "SomePrefabName"; 
      } 
     } 
    } 

Answer 1

尝试更改为这个捕捉到的1网格：

public GameObject tilePrefab; 
     void OnMouseDrag(){ 
     Vector2 pos = Input.mousePosition; 
     pos = Camera.main.ScreenToWorldPoint (pos); 
     pos.x = Mathf.Round(pos.x); 
     pos.y = Mathf.Round(pos.y); 
     transform.position = pos; 
     var hitColliders = Physics.OverlapSphere(transform.position, 1); 
     if (Input.GetKey (KeyCode.LeftControl)) { 
      if (hitColliders.Length == 0) { 
       GameObject myGameObject = Instantiate (tilePrefab) as GameObject; 
       myGameObject.name = "SomePrefabName"; 
      } 
     } 
    } 

这里我们使用Physics.OverlapSphere来检测，如果我们在想要的位置有一个对撞机，如果不是，在这种情况下，我们继续执行代码