public Vector3 relativeVelocity ;

説明

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 OnCollisionEnter(Collision collision) { if (collision.relativeVelocity.magnitude > 2) audioSource.Play(); } }