Transform.root 根

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void OnCollisionEnter(Collision collision) {
		if (collision.transform.root != transform.root)
			print("The colliding objects are not in the same hierarchy");

	}
}

// Is a collision between two objects in different hierarchies?
//碰撞的两个物体在不同的层次？
function OnCollisionEnter(collision : Collision) {
	if ( collision.transform.root != transform.root ) {
		print("The colliding objects are not in the same hierarchy");
	}
}