防护等级制作变量无法访问

我正在尝试使用Unity和C＃来制作第一人称游戏。使用我自己创建的脚本之一，我试图访问股票“FirstPersonController”中的运行速度和行走速度变量。防护等级制作变量无法访问

我已经改变了所需的变量公开，我甚至可以看到它们在属性检查器窗口，但我自己的脚本是无法访问他们，以下错误：

1）无法访问变量运行和步行速度。

Assets/PlayerVitals.cs(134,30): error CS0122: `UnityStandardAssets.Characters.FirstPerson.FirstPersonController.m_RunSpeed' is inaccessible due to its protection level

2）无法访问变量我加入FirstPersonController，声称它不存在（尽管它显示在Unity属性检查器 - 截图附后）

Assets/PlayerVitals.cs(134,60): error CS1061: Type `UnityStandardAssets.Characters.FirstPerson.FirstPersonController' does not contain a definition for `m_NormRunSpeed' and no extension method `m_NormRunSpeed' of type `UnityStandardAssets.Characters.FirstPerson.FirstPersonController' could be found. Are you missing an assembly reference?

以下是有关两个代码的一部分：

FirstPersonController.cs：

namespace UnityStandardAssets.Characters.FirstPerson 
{ 
    [RequireComponent(typeof (CharacterController))] 
    [RequireComponent(typeof (AudioSource))] 
    public class FirstPersonController : MonoBehaviour 
    { 
     [SerializeField] private bool m_IsWalking; 
     [SerializeField] public float m_WalkSpeed; 
     [SerializeField] public float m_RunSpeed; 
     [SerializeField] public float m_NormRunSpeed;

个PlayerVitals.cs：

using UnityStandardAssets.Characters.FirstPerson; 

public class PlayerVitals : MonoBehaviour { 
public FirstPersonController playerController; 
playerController = GetComponent<FirstPersonController>(); 
. 
. 
currentSpeed = playerController.m_RunSpeed;