[Unity FPS Tutorial 1] First Person Shooter in UNITY

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Player : LivingEntity
{
    [SerializeField]
    private CameraController cameraController;
    private PlayerMovement playerMovement;

    void Awake()
    {
        playerMovement = GetComponent<PlayerMovement>();
    }

    void Update()
    {
        float x = Input.GetAxisRaw("Horizontal");
        float y = Input.GetAxisRaw("Vertical");

        playerMovement.MoveTo(new Vector3(x, 0, y));

        if (Input.GetKeyDown(KeyCode.Space))
        {
            playerMovement.Jump();
        }

        if (Input.GetKeyDown(KeyCode.LeftShift))
        {
            playerMovement.speed = 70f;
        }

        float mouseX = Input.GetAxis("Mouse X");	// 마우스 좌/우 움직임
		    float mouseY = Input.GetAxis("Mouse Y");	// 마우스 위/아래 움직임

		    cameraController.RotateTo(mouseX, mouseY);
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerMovement : MonoBehaviour
{
    [HideInInspector]
    public float speed = 30f;
    private float jumpForce = 3f;
    private float gravity = -9.8f;
    private Vector3 moveDirection;

    [SerializeField]
    private Transform cameraTransform;
    private CharacterController characterController;

    private void Awake()
    {
        characterController = GetComponent<CharacterController>();
    }

    void Update()
    {
        //공중이라면 중력 적용
        if(!characterController.isGrounded)
            moveDirection.y += gravity * Time.deltaTime;

        characterController.Move(moveDirection * speed * Time.deltaTime);
        transform.rotation = cameraTransform.rotation;
    }

    public void MoveTo(Vector3 direction)
    {
		Vector3 movedis = cameraTransform.rotation * direction;
		moveDirection = new Vector3(movedis.x, moveDirection.y, movedis.z);
    }

    public void Jump()
    {
        if (characterController.isGrounded)
            moveDirection.y = jumpForce;
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class CameraController : MonoBehaviour
{
    private float rotateSpeedX = 3f;
    private float rotateSpeedY = 5f;

    //x축 회전 각도 제한
    private float limitMinX = -25f;
    private float limitMaxX = 50f;
    
    private float euerAngleX;
    private float euerAngleY;

    public void RotateTo(float mouseX, float mouseY)
    {
        //마우스 좌/우는 카메라 y축
        //마우스 상/하는 카메라 x축
        euerAngleY += mouseX * rotateSpeedX;
        euerAngleX -= mouseY * rotateSpeedY;

        //X축 각도 제한
        euerAngleX = ClampAngle(euerAngleX, limitMinX, limitMaxX);
        transform.rotation = Quaternion.Euler(euerAngleX, euerAngleY, 0);
    }

    private float ClampAngle(float angle, float min, float max)
    {
        if (angle < -360)
            angle += 360;
        if (angle > 360)
            angle -= 360;
        return Mathf.Clamp(angle, min, max);
    }
}