unity脚本出现BUG，关于寻路的问题

敌人的寻路相关问题报错，用的是unity自带的navigation，目前只有一处错误，求解答
还有就是玩家的镜头问题，现在玩家的视角，只能左右移动，上下没有办法移动，这个是代码出现问题了么
再者就是玩家的前后左右移动问题，不能跟随视角移动，按W键只能前进，转移视角之后，就要按A或者D键前进，这是什么原因，怎么解决
敌人的寻路代码

using UnityEngine;
using System.Collections;

public class Enemy : MonoBehaviour 
{
    Transform m_transform;
    Player m_player;
    NavMeshAgent m_agent;
    float m_movSpeed = 2.5f;
    void Start()
    {
        m_transform = this.transform;
        m_player = GameObject.FindGameObjectWithTag("Player").GetComponent<Player>();
        m_agent = GetComponent<NavMeshAgent>();
        m_agent.speed = m_movSpeed;
        m_agent.SetDestination(m_player.m_transform.position);
    }

}

玩家代码

using UnityEngine;
using System.Collections;

public class Player : MonoBehaviour 
{
    public Transform m_transform;
    CharacterController m_ch;
    float m_movSpeed = 5.0f;
    float m_gravity = 6.0f;
    public int m_life = 5;
    public float m_jumpSpeed = 10.0f;
    private Vector3 m_movDirection = Vector3.zero;
    Transform m_camTransform;
    Vector3 m_camRot;
    float m_camHeight = 1.4f;
    void Start()
    {
        m_transform = this.transform;
        m_ch = this.GetComponent<CharacterController> ();
        m_camTransform = Camera.main.transform;
        Vector3 pos = m_transform.position;
        pos.y += m_camHeight;
        m_camTransform.position = pos;
        m_camTransform.rotation = m_transform.rotation;
        m_camRot = m_camTransform.eulerAngles;
        Screen.lockCursor = true;
    }
    void Update()
    {
        if (m_life <= 0)
            return;
        Control ();
    }
    void Control()
    {
        float rh = Input.GetAxis ("Mouse X");
        float rv = Input.GetAxis ("Mouse Y");
        m_camRot.x -= rv;
        m_camRot.y += rh;
        m_camTransform.eulerAngles = m_camRot; 
        Vector3 camRot = m_camTransform.eulerAngles;
        camRot.x = 0;
        camRot.z = 0;
        m_camTransform.eulerAngles = camRot;
        Vector3 pos = m_transform.position;
        pos.y += m_camHeight;
        m_camTransform.position = pos;
        float xm = 0, ym = 0, zm = 0;
        ym -= m_gravity * Time.deltaTime;
        if (Input.GetKey (KeyCode.W)) 
        {
            zm += m_movSpeed * Time.deltaTime;
        }
        else if (Input.GetKey (KeyCode.S)) 
        {
            zm -= m_movSpeed * Time.deltaTime;
        }
        if (Input.GetKey (KeyCode.A)) 
        {
            xm -= m_movSpeed * Time.deltaTime;
        }
        else if (Input.GetKey (KeyCode.D)) 
        {
            xm += m_movSpeed * Time.deltaTime;
        }
        if (Input.GetKeyDown (KeyCode.Space)) 
        {
            m_movDirection.y = m_jumpSpeed;
        }
        m_movDirection.y -= m_gravity * Time.deltaTime;
        m_ch.Move (m_transform.TransformDirection (new Vector3 (xm, ym, zm)));
        m_ch.Move (m_movDirection * Time.deltaTime);
    }


}

报错内容
UnassignedReferenceException: The variable m_transform of Player has not been assigned.
You probably need to assign the m_transform variable of the Player script in the inspector.
UnityEngine.Transform.get_position () (at C:/buildslave/unity/build/artifacts/EditorGenerated/UnityEngineTransform.cs:28)
Enemy.Start () (at Assets/Scripts/Enemy.cs:16)

具体的现象就是，敌人的模型站在那不动

是不是时序问题？同个start上。你可以把player的Start改成Awake试试。
还有其实直接用player.transform就可以了，不需要再用一个m_transform来初始化获取，然后把Player.cs挂到你要的模型预制件上。

Player的变量m_transform没有被赋值。

你需要为Player脚本的m_transform变量赋值。
Transform m_transform;
m_transform = this.transform;
自己赋值给自己，明显有问题

你debug一下你enemy脚本中find到的player，估计就没获取到。