衝突した 2 つのオブジェクトの相対的な速度(読み取り専用)
// Play a sound when we hit an object with a big velocity using UnityEngine; using System.Collections;
public class ExampleClass : MonoBehaviour { AudioSource audio; void Start() { audio = GetComponent<AudioSource>(); } void OnCollisionEnter(Collision collision) { if (collision.relativeVelocity.magnitude > 2) audio.Play(); } }