using UnityEngine;

​

public class PlayerMovement : MonoBehaviour

{

    [SerializeField]

    private float maximumSpeed;

​

    [SerializeField]

    private float rotationSpeed;

​

    [SerializeField]

    private float jumpSpeed;

​

    [SerializeField]

    private float jumpButtonGracePeriod;

​

    [SerializeField]

    private Transform cameraTransform;

​

    private Animator animator;

    private CharacterController characterController;

    private float ySpeed;

    private float originalStepOffset;

    private float? lastGroundedTime;

    private float? jumpButtonPressedTime;

​

    // Start is called before the first frame update

    void Start()

    {

        animator = GetComponent<Animator>();

        characterController = GetComponent<CharacterController>();

        originalStepOffset = characterController.stepOffset;

    }

​

    // Update is called once per frame

    void Update()

    {

        float horizontalInput = Input.GetAxis("Horizontal");

        float verticalInput = Input.GetAxis("Vertical");

​

        Vector3 movementDirection = new Vector3(horizontalInput, 0, verticalInput);

        float inputMagnitude = Mathf.Clamp01(movementDirection.magnitude);

        if (Input.GetKey(KeyCode.LeftShift) || Input.GetKey(KeyCode.RightShift))

        {

            inputMagnitude /= 2;

        }

​

        animator.SetFloat("Input Magnitude", inputMagnitude, 0.05f, Time.deltaTime);

​

        float speed = inputMagnitude * maximumSpeed;

        movementDirection = Quaternion.AngleAxis(cameraTransform.rotation.eulerAngles.y, Vector3.up) * movementDirection;

        movementDirection.Normalize();

​

        ySpeed += Physics.gravity.y * Time.deltaTime;

​

        if (characterController.isGrounded)

        {

            lastGroundedTime = Time.time;

        }

​

        if (Input.GetButtonDown("Jump"))

        {

            jumpButtonPressedTime = Time.time;

        }

​

                 characterController.stepOffset = originalStepOffset;

            ySpeed = -0.5f;

​

            if (Time.time - jumpButtonPressedTime <= jumpButtonGracePeriod)

            {

                ySpeed = jumpSpeed;

                jumpButtonPressedTime = null;

                lastGroundedTime = null;

            }

        }

        else

        {

            characterController.stepOffset = 0;

        }

​

        Vector3 velocity = movementDirection * speed;

        velocity.y = ySpeed;

​

        characterController.Move(velocity * Time.deltaTime);

​

        if (movementDirection != Vector3.zero)

        {

            Quaternion toRotation = Quaternion.LookRotation(movementDirection, Vector3.up);

​

            transform.rotation = Quaternion.RotateTowards(transform.rotation, toRotation, rotationSpeed * Time.deltaTime);

        }        

    }

​

    private void OnApplicationFocus(bool focus)

    {

        if (focus)

        {

            Cursor.lockState = CursorLockMode.Locked;

        }

        else

        {

            Cursor.lockState = CursorLockMode.None;

        }

    }

}   if (Time.time - lastGroundedTime <= jumpButtonGracePeriod)

        {

            characterController.stepOffset = originalStepOffset;

            ySpeed = -0.5f;

​

            if (Time.time - jumpButtonPressedTime <= jumpButtonGracePeriod)

            {

                ySpeed = jumpSpeed;

                jumpButtonPressedTime = null;

                lastGroundedTime = null;

            }

        }

        else

        {

            characterController.stepOffset = 0;

        }

​

        Vector3 velocity = movementDirection * speed;

        velocity.y = ySpeed;

​

        characterController.Move(velocity * Time.deltaTime);

​

        if (movementDirection != Vector3.zero)

        {

            Quaternion toRotation = Quaternion.LookRotation(movementDirection, Vector3.up);

​

            transform.rotation = Quaternion.RotateTowards(transform.rotation, toRotation, rotationSpeed * Time.deltaTime);

        }        

    }

​

    private void OnApplicationFocus(bool focus)

    {

        if (focus)

        {

            Cursor.lockState = CursorLockMode.Locked;

        }

        else

        {

            Cursor.lockState = CursorLockMode.None;

        }

    }

}