Unity3D-模拟物理完全弹性碰撞反弹

根据入射方向得到反射方向，并保留相同速率

    private Vector3 m_preVelocity = Vector3.zero;//上一帧速度    public void OnCollisionEnter(Collision collision)    {        if (collision.gameObject.name == "wall")        {            ContactPoint contactPoint = collision.contacts[0];            Vector3 newDir = Vector3.zero;            Vector3 curDir = transform.TransformDirection(Vector3.forward);            newDir = Vector3.Reflect(curDir, contactPoint.normal);            Quaternion rotation = Quaternion.FromToRotation(Vector3.forward, newDir);            transform.rotation = rotation;            rigidbody.velocity = newDir.normalized * m_preVelocity.x / m_preVelocity.normalized.x;        }
    }转自http://blog.csdn.net/wsc122181582/article/details/52790317