ElasticMaterial.cs

using UnityEngine;public class ElasticMaterial : MonoBehaviour{    public float BounceForce = 25;//弹力    public float FrictionQuotiety = 0.988f;//摩擦系数    Rigidbody2D m_rigidbody;    void Start()    {        gameObject.AddMissingComponent<Rigidbody2D>();        m_rigidbody = GetComponent<Rigidbody2D>();    }    void Update()    {        m_rigidbody.velocity = m_rigidbody.velocity * FrictionQuotiety;//增加摩擦系数以免无限反弹        if (m_rigidbody.velocity.sqrMagnitude < 0.01f) m_rigidbody.velocity = Vector3.zero;//速度过小则停止    }    void OnCollisionStay2D(Collision2D collision)    {        if (m_rigidbody == default(Rigidbody2D)) return;        for (var i = 0; i < collision.contacts.Length; i++)        {            var contact = collision.contacts[i];            m_rigidbody.AddForce(contact.normal * BounceForce, ForceMode2D.Force);            Debug.DrawRay(contact.point, contact.normal, Color.blue);//绘制法线,用于测试参考        }    }}