How to make one jump to Unity2D platformer? When you hold W, it starts to fly, how to limit it to one jump?

Question

C++ / C#

using UnityEngine;

public class Hero : MonoBehavior
{
[SerializeField] private float speed;
public float force;
public Rigidbody2D rigidbody;

void Update()

{
if (Input.GetKey(KeyCode.A))
{
transform.Translate(Vector2.left * Time.deltaTime * speed);
}
if (Input.GetKey(KeyCode.D))
{
transform.Translate(Vector2.right * Time.deltaTime * speed);
}
if (Input.GetKey(KeyCode.W))
{
rigidbody.AddForce(Vector2.up * force, ForceMode2D.Impulse);
}
}
}

Answer 1

You can either check "whether it's on the ground", as they do in the tutorials, or just do a cooldown
. Here's the cooldown:
[SerializeField] private float speed;
public float force;
public Rigidbody2D rigidbody;
public float timeCoolDown; //Collapse time
private bool heJumped = false; //Check "Did the player jump?"
void Update()
{
if (Input.GetKey(KeyCode.A))
{
transform.Translate(Vector2.left * Time.deltaTime * speed);
}
if (Input.GetKey(KeyCode.D))
{
transform.Translate(Vector2.right * Time.deltaTime * speed);
}
if (Input.GetKey(KeyCode.W) && heJumped == false)
{
rigidbody.AddForce(Vector2.up * force, ForceMode2D.Impulse);
StartCoroutine(CoolDown());
}
}
IEnumerator CoolDown()
{
heJumped = true;
yield return new WaitForSeconds(timeCoolDown);
heJumped=false;
}
the code has not been checked, so if there are errors - write
Here is the ground check:
[SerializeField] private float speed;
public float force;
public Rigidbody2D rigidbody;
public bool isGrounded; //Check "Whether the player is on the ground"
void Update()
{
if (Input.GetKey(KeyCode.A))
{
transform.Translate(Vector2.left * Time.deltaTime * speed);
}
if (Input.GetKey(KeyCode.D))
{
transform.Translate(Vector2.right * Time.deltaTime * speed);
}
if (Input.GetKey(KeyCode.W) && isGrounded == true)
{
rigidbody.AddForce(Vector2.up * force, ForceMode2D.Impulse);
}
}
private void OnCollisionEnter2D(Collision2D collision)
{
if (collision.gameObject.CompareTag("Ground"))
{
isGrounded = true;
}
}
private void OnCollisionExit2D(Collision2D collision)
{
if (collision.gameObject.CompareTag("Ground"))
{
isGrounded = false;
}
}