移动跳跃滑步

public class MoveController : MonoBehaviour
{
    public float movementSpeed;
    public float jumpSpeed;
    public float runMultiplier;
    public float gravity = -9.81f;    
    Vector3 velocity; 
    private CharacterController characterController;

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

    void Update()
    {
        if(characterController.isGrounded && velocity.y < 0)
        {
            velocity.y = -2f;
        }

        float x = Input.GetAxis("Horizontal");
        float z = Input.GetAxis("Vertical");

        Vector3 movement = transform.right * x + transform.forward * z;

        characterController.Move(movement * movementSpeed * Time.deltaTime);

        velocity.y += gravity * Time.deltaTime;

        characterController.Move(velocity * Time.deltaTime);

        if(Input.GetButton("Jump") && characterController.isGrounded)
        {
            velocity.y = Mathf.Sqrt(jumpSpeed * -2f * gravity);
        }

        if(Input.GetKey(KeyCode.LeftShift))
        {
            characterController.Move(movement * Time.deltaTime * runMultiplier);
        }

    }
}