Collision.contacts 接触点列表

# [Collision](Collision.html).contacts 接触点列表

var *contacts* : [ContactPoint](../ContactPoint/ContactPoint.html)[]

*Description* 描述

The contact points generated by the physics engine.

接触点由物理引擎产生。

Every contact contains a contact point, normal and the two colliders that
collided (see [ContactPoint](../ContactPoint/ContactPoint.html)).
From inside [OnCollisionStay](../Collider/Collider.OnCollisionStay.html) or [OnCollisionEnter](../Collider/Collider.OnCollisionEnter.html) you can
always be sure that contacts has at least one element.

每一个接触（contact）包含一个接触点、法线和两个碰撞的碰撞器（看 [ContactPoint](../ContactPoint/ContactPoint.html)）。在 [OnCollisionStay](../Collider/Collider.OnCollisionStay.html) 或 [OnCollisionEnter](../Collider/Collider.OnCollisionEnter.html) 里你确保 contacts 至少有一个元素。

* [C#](#)
* [JavaScript](#)

```
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	void OnCollisionStay(Collision collision) {
		foreach (ContactPoint contact in collision.contacts) {
			print(contact.thisCollider.name + " hit " + contact.otherCollider.name);
			Debug.DrawRay(contact.point, contact.normal, Color.white);
		}
	}
}
```

```
function OnCollisionStay(collision : Collision) {
	// Check if the collider we hit has a rigidbody
	// Then apply the force
	//检查如果碰撞的碰撞器有刚体，然后应用力
	for (var contact : ContactPoint in collision.contacts) {
		print(contact.thisCollider.name + " hit " + contact.otherCollider.name);
		// Visualize the contact point
		//可视化接触点
		Debug.DrawRay(contact.point, contact.normal, Color.white);
	}
}
```

* [C#](#)
* [JavaScript](#)

```
using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
	public Transform explosionPrefab;
	void OnCollisionEnter(Collision collision) {
		ContactPoint contact = collision.contacts[0];
		Quaternion rot = Quaternion.FromToRotation(Vector3.up, contact.normal);
		Vector3 pos = contact.point;
		Instantiate(explosionPrefab, pos, rot);
		Destroy(gameObject);
	}
}
```

```
// A grenade
//一个手榴弹
// - instantiates a explosion prefab when hitting a surface
// - then destroys itself
//当碰到表面时，实例化一个爆炸预设
var explosionPrefab : Transform;

function OnCollisionEnter(collision : Collision) {
	// Rotate the object so that the y-axis faces along the normal of the surface
	//旋转物体，y轴面沿着表面的法线。
	var contact = collision.contacts[0];
	var rot = Quaternion.FromToRotation(Vector3.up, contact.normal);
	var pos = contact.point;
	Instantiate(explosionPrefab, pos, rot);
	// Destroy the projectile
	//销毁手榴弹
	Destroy (gameObject);
}
```