Controller Unity3D

PlayerController.cs

using UnityEngine;
using System.Collections;

public class PlayerController : MonoBehaviour {

    private float _speed;
    public float walkSpeed = 2f;
    public float runSpeed = 4f;
    private Rigidbody _playerRigidbody;
    private Vector3 _movimentVector3;
    private Animator _playerAnimator;


    void Start()
    {
        _playerRigidbody = GetComponent<Rigidbody>();
        _playerAnimator = GetComponent<Animator>();

    }

    
    private void Update() {

        float _horizontal = Input.GetAxis("Horizontal");
        float _vertical = Input.GetAxis("Vertical");
        bool _run = Input.GetKey(KeyCode.LeftShift);
        
        _movimentVector3 = new Vector3(_horizontal, 0, _vertical);

        print("CheckFire - Fire2: "+CheckFire("Fire2"));
        
        if(_movimentVector3 != new Vector3(0,0,0) && !_run){
            _speed = walkSpeed;
            if (CheckFire("Fire2")){
                _playerAnimator.SetBool("IsAimingWalk",true);
            }else{
            _playerAnimator.SetBool("IsWalking",true);
            }
        }else if(_movimentVector3 != new Vector3(0,0,0) && _run){
            _speed = runSpeed;
            if (CheckFire("Fire2")){
                _playerAnimator.SetBool("IsAimingRun",true);
            }else{
            _playerAnimator.SetBool("IsRunning",true);
            }
        }else{
            _speed = 0;
            ResetAnimation();

        }

        MovimentPlayer();
        
    }

    private void ResetAnimation(){
        _playerAnimator.SetBool("IsRunning",false);
        _playerAnimator.SetBool("IsWalking",false);
        _playerAnimator.SetBool("IsAimingWalk",false);
        _playerAnimator.SetBool("IsAimingRun",false);
    }
    
    private void FixedUpdate()
    {
        RotacionarPlayer();
    }

    bool CheckFire(string _fire){

        if (Input.GetAxisRaw(_fire) != 0){
            return true;
        }else{
            return false;
        }


    }

    void MovimentPlayer(){

        _playerRigidbody.MovePosition(transform.position + _movimentVector3 * _speed * Time.deltaTime);
        //transform.rotation = Quaternion.LookRotation(_movimentVector3);
    }

    void RotacionarPlayer(){

        Vector3 _positionOnScreen = Camera.main.WorldToViewportPoint(transform.position);
        Vector3 _mouseOnScreen = (Vector2)Camera.main.ScreenToViewportPoint(Input.mousePosition);

        Vector3 _direction = _mouseOnScreen - _positionOnScreen;
        float angle = Mathf.Atan2(_direction.y,_direction.x) * Mathf.Rad2Deg -90.0f;
        transform.rotation = Quaternion.Euler(new Vector3(0, -angle, 0));
    }

}