ContactPoint.normal 法线

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void OnCollisionEnter(Collision other) {
		print("Points colliding: " + other.contacts.Length);
		print("First normal of the point that collide: " + other.contacts[0].normal);
	}
}

// Print how many points are colliding this transform
//打印这个变换有多少碰撞点
// And print the first point normal that is colliding.
//并打印第一个碰撞点的法线
function OnCollisionEnter(other : Collision) {
	print("Points colliding: " + other.contacts.Length);
	print("First normal of the point that collide: " + other.contacts[0].normal);
}