No estoy seguro de cómo evitar que se acelere para siempre.
[SerializeField] float moveSpeed; [SerializeField] float turnSpeed; [SerializeField] float maxForwardVelocity; private Rigidbody rigidbody; private void Start() { rigidbody = GetComponent<Rigidbody>(); } private void Update() { if(Input.GetAxis("Vertical") != 0) { float rotateInput = Input.GetAxis("Horizontal") * turnSpeed * Time.deltaTime; transform.eulerAngles += new Vector3(0f, rotateInput, 0f); } float forwardInput = Input.GetAxis("Vertical") * moveSpeed * Time.deltaTime; rigidbody.AddRelativeForce(new Vector3(forwardInput, 0f, 0f)); }Primero, debe hacer cálculos de física en FixedUpdate .
Segundo, usando algunas matemáticas vectoriales puedes calcular la aceleración a aplicar. Explicación en comentarios:
float rotateInput; float forwardInput; private void Update() { rotateInput = 0f; if(Input.GetAxis("Vertical") != 0) { rotateInput = Input.GetAxis("Horizontal") * turnSpeed; } forwardInput = Input.GetAxis("Vertical") * moveSpeed; } void FixedUpdate() { transform.eulerAngles += new Vector3(0f, rotateInput * Time.deltaTime, 0f); // How much the current frame wants to change velocity in the forward direction float uncappedForwardDS = forwardInput * Time.deltaTime * Time.deltaTime / rigidbody.mass; // How fast are we going in the forward direction float curForwardSpeed = Vector3.Dot(transform.forward, rigidbody.velocity); // prevent braking effect when going forward (don't "accelerate" less than 0) float availableForwardDS = Mathf.Max(0f, maxForwardVelocity - curForwardSpeed); // Cap the relative delta speed float cappedRelDS = Mathf.Min(uncappedForwardDS, availableForwardDS); // Mass and deltaTime of frame already accounted for, so apply with VelocityChange rigidbody.AddRelativeForce(new Vector3(cappedRelDS, 0f, 0f), ForceMode.VelocityChange); }