unity 给地图设置边界代码

 //设置地图边界：1：创建一个类  Boundary(边界)
    public class Boundary
    {
        public float xMin;
        public float xMax;
        public float zMin;
        public float zMax;
    }
    public Transform m_Transform;
    private Rigidbody m_Rigidbody;
    public Boundary boundary;
    void Start () {
        m_Transform = gameObject.GetComponent<Transform>();
        m_Rigidbody = gameObject.GetComponent<Rigidbody>();
        //实例化  Bundary 类 ，并给这些变量赋值；
        boundary = new Boundary()  {  xMin = -3f, xMax = 3f, zMin = -3f, zMax = 3f  };
    }
    
    void Update () {
      
        float fmh = Input.GetAxis("Horizontal");//得到水平移量
        float fmv = Input.GetAxis("Vertical");  //得到垂直移量
        Vector3 move = new Vector3(fmh,0,fmv);  //形成三维向量
      

        if (m_Rigidbody!=null)
        {
            m_Rigidbody.velocity = move *10;    //得到刚体的速度

            //限制刚体的移动范围   Mathf.Clamp   一个范围
            float fx = Mathf.Clamp(m_Rigidbody.position.x,boundary.xMin,boundary.xMax);
            float fz = Mathf.Clamp(m_Rigidbody.position.z,boundary.zMin,boundary.zMax);
            
           m_Rigidbody.position = new Vector3(fx,0.0F,fz);


            ///物体的倾斜角度
            m_Rigidbody.rotation = Quaternion.Euler(0.0F,0.0F,m_Rigidbody.velocity.x*5f);


        }


    }
}