本文共 628 字，大约阅读时间需要 2 分钟。

一：演示视频

二：代码实现

using UnityEngine;public class Ball : MonoBehaviour{    private Rigidbody rigid;    private Vector3 lastDir;    public float speed = 30;    private void Awake()    {        rigid = GetComponent
   
    ();        rigid.velocity = new Vector3(1, 0, 1) * speed;    }    private void LateUpdate()    {        lastDir = rigid.velocity;    }    private void OnCollisionEnter(Collision other)    {        if (other.gameObject.tag == "Wall")        {            Vector3 reflexAngle = Vector3.Reflect(lastDir, other.contacts[0].normal);            rigid.velocity = reflexAngle.normalized * lastDir.magnitude;        }    }}
   

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