具有角色移动、视角、重力和跳跃的完整PlayerController代码。

public class PlayerController : MonoBehaviour
{
    [Header("Unity组件")]
    public CharacterController m_Controller;
    public Transform playerCamera;

    [Header("玩家数值")]
    public float moveSpeed = 6.0F;
    public float mouseSensitivity = 1000.0F;
    public float playerGravity = 9.8F;
    public float jumpHeight = 2F;
    public float verticalVelocity = 0;// 垂直速度
    private float x_RotationOffset = 0;// 累计x旋转
    private float y_RotationOffset = 0;// 累计y旋转


    void Start()
    {
        m_Controller = this.GetComponent<CharacterController>();
        Cursor.lockState = CursorLockMode.Locked;// 鼠标锁定
    }

    
    private void FixedUpdate()
    {
        PlayerRotation();
        PlayerMovement();
    }

    // 控制角色移动
    public void PlayerMovement()
    {
        Vector3 moveDirection = Vector3.zero;
        // 获取键盘输入：Horizontal左右移动；Vertical前后移动
        // 加入自身tranform方向
        moveDirection = Vector3.zero;
        moveDirection += transform.forward  * Input.GetAxis("Vertical");
        moveDirection += transform.right * Input.GetAxis("Horizontal");
        moveDirection *= Time.fixedDeltaTime * moveSpeed;
        // 重力
        if (!m_Controller.isGrounded)
            verticalVelocity -= playerGravity * Time.fixedDeltaTime;// a*t=v
        else
            verticalVelocity = 0.0F;
        // 跳跃
        if (Input.GetButton("Jump"))
        {
            // 得在地面才能跳
            if (m_Controller.isGrounded)
            {
                verticalVelocity = Mathf.Sqrt(jumpHeight * 2 / playerGravity) * playerGravity;// 初始向上速度
            }
        }
        moveDirection.y += verticalVelocity * Time.fixedDeltaTime;// v*t=s
        // 移动
        m_Controller.Move(moveDirection);
    }

    // 控制角色视角
    private void PlayerRotation()
    {
        // 获取鼠标移动
        x_RotationOffset += Input.GetAxis("Mouse X")* Time.fixedDeltaTime * mouseSensitivity;// 水平方向
        y_RotationOffset += Input.GetAxis("Mouse Y")* Time.fixedDeltaTime * mouseSensitivity;// 垂直方向
        // 限制垂直旋转角度
        y_RotationOffset = Mathf.Clamp(y_RotationOffset, -45f, 45f);
        // 旋转
        transform.rotation = Quaternion.Euler(new Vector3(0, x_RotationOffset, 0));// Player旋转
        playerCamera.localRotation= Quaternion.Euler(new Vector3(y_RotationOffset, playerCamera.localEulerAngles.y, playerCamera.localEulerAngles.z));// Camera旋转
    }
}