Unity 自动计算所有物体包围盒的中心点

美术在做场景的时候可能会出现这个情况？ 如下图所示，这个地块的中心点远离模型十万八千里？与其相信美术或者策划我觉得程序要更相信自己！！

	[MenuItem ("MyMenu/Do Test")]
	static void Test () 
	{
		Transform parent = 	Selection.activeGameObject.transform;
		Vector3 postion = parent.position;
		Quaternion rotation = parent.rotation;
		Vector3 scale = parent.localScale;
		parent.position = Vector3.zero;
		parent.rotation = Quaternion.Euler(Vector3.zero);
		parent.localScale = Vector3.one;
 
		Vector3 center = Vector3.zero;
		Renderer[] renders = parent.GetComponentsInChildren();
		foreach (Renderer child in renders){
			center += child.bounds.center;   
		}
		center /= parent.GetComponentsInChildren().Length; 
		Bounds bounds = new Bounds(center,Vector3.zero);
		foreach (Renderer child in renders){
			bounds.Encapsulate(child.bounds);   
		}
	
		parent.position = postion;
		parent.rotation = rotation;
		parent.localScale = scale;
 
		foreach(Transform t in parent){
			t.position = t.position -  bounds.center;
		}
		parent.transform.position = bounds.center + parent.position;
 
	}

OK 大功告成。 中心点居中了。。