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 audioSource;
void Start() { audioSource = GetComponent<AudioSource>(); }
void OnCollisionEnter2D(Collision2D collision) { if (collision.relativeVelocity.magnitude > 2) audioSource.Play(); } }