这两个碰撞对象的相对线性速度(只读)。
// Play a sound when we hit an object with a big velocity using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { AudioSource audioSource;
void Start() { audioSource = GetComponent<AudioSource>(); }
void OnCollisionEnter(Collision collision) { if (collision.relativeVelocity.magnitude > 2) audioSource.Play(); } }