How do I check if a function has been called recently?

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Hi, I'm working on a script where the player takes 1 damage when being crushed in between two objects. However, the issue I'm having is that if the objects are traveling fast enough, the player takes 2 damage.

What I'm currently trying to do is check if a function has recently been called, and if so, to not call the function again. I also tried adding an invulnerability function, but I wasn't able to get that to work. Here's the code as it is-- still learning coding in general, so I apologize if there's some bizarre practice going on. Thank you!

PlayerController script:

 if (isCrushed)
         {
             RaycastHit2D hit = new RaycastHit2D();
             hit = Physics2D.Raycast(transform.position, Vector2.up, 5.0f, whatIsHexPlate);
 
             if (hit.collider != null && hit.collider.tag == "HexPlate")
             {
                 hit.collider.gameObject.transform.GetComponent<Rigidbody2D>().AddForce(upHpm);
             }
 
             //Deduct 1 health.
             playerHealth.TakeDamage(1);
         }

PlayerHealth script:

 public void TakeDamage(int amount)
     {
         damaged = true;
         currentHealth -= amount;
 
         if (currentHealth <= 0 && !isDead)
         {
             Death();
         }
     }
 
     public void Invulnerable(float time)
     {
         damaged = false;
         invulnerableTimeMax = time;
 
         if (Time.deltaTime < invulnerableTimeMax)
         {
             damaged = false;
             isInvulnerable = true;
         }
         else if (Time.deltaTime >= invulnerableTimeMax)
         {
             isInvulnerable = false;
         }
     }

Answer 1

hello FlyingMeta. Making your charakter invulnerable for a short time after hit can be done by various methods. One that I like to use for such things is to make a bool that flips to true and prevents further damaging before flipping back to false.

     public bool invulnerable = false;
     public float invulnerableTime = 2f;

     void Update () {
         if (!invulnerable)
         {
             if (isCrushed)
             {
                 //yourCode
                 //Deduct 1 health.
                 //playerHealth.TakeDamage(1);
                 invulnerable = true;
             }    
         }
         else
         {
             invulnerableTime -= Time.deltaTime;
             if (invulnerableTime <= 0)
             {
                 invulnerableTime = 2f;
                 invulnerable = false;
             }
         }    
     }

you can as well make a coroutine to count down the time and gets started as you are damaged.

     void Update () {
         if (!invulnerable)
         {
             if (isCrushed)
             {
                 //yourCode
                 //Deduct 1 health.
                 //playerHealth.TakeDamage(1);
                 invulnerable = true;
                 StartCoroutine(InvulnerableCountdown(invulnerableTime));
             }
         }
     }
 
     IEnumerator InvulnerableCountdown(float time)
     {
         yield return new WaitForSeconds(time);
         invulnerable = false;
     }

hope it helps (:

How do I check if a function has been called recently?

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