OnCollisionEnter as IEnumerator problem (WaitForSecond)

Question

Hello there! It's me with my seemingly endless Unity problems. This time, I want to create a WaitForSecond function inside an OnCollisionEnter function. So naturally I changed it into IEnumerator. But the WaitForSecond still doesn't occur. What seems to be the problem here?

     void Start() {
     //StartCoroutine("OnCollisionEnter", ????);
 }
 IEnumerator OnCollisionEnter (Collision coll) {
         if(coll.gameObject.tag == "bullet") 
     {
         hitPoints -= bulletDamage;
     } 
 
         if (hitPoints <= 0 && enemy == true)
     { 
         Instantiate(explosionPrefab, transform.position, transform.rotation);
         Destroy(gameObject); // YES, the object destroyed.
         yield return new WaitForSeconds(1); // NO, it didn't wait.
         Time.timeScale = 0; // NO, this didn't happen also.
         info.text = "YOU WIN!"; //NO.
     }
 }

As you can see I've also tried to call the function with StartCoroutine but I can't figure out what parameter should I put into the bracket. Sounds noobish? I am one. Any kinds of help appreciated!

Answer 1

Best Answer

Answer by GoSuNeem · Oct 31, 2011 at 09:11 PM

I would suggest that instead of trying to change the whole function of OnCollisionEnter, just use a Invoke().

http://unity3d.com/support/documentation/ScriptReference/MonoBehaviour.Invoke.html

 void OnCollisionEnter (Collision coll) {
   //do something
   Invoke("MyWaitingFunction",10); //this would make it wait 10 seconds then run the function called "MyWaitingFunction"
 }
 
 void MyWaitingFunction()
 {
   //Stuff here happens after 10 seconds of the collision.
 }

Good Luck!

Add comment · Show 9 · Share

meazant · Oct 31, 2011 at 10:16 PM 0

Share

Thank you for your suggestion, but I can't seem to make the Invoke function work too. Here's the code :

         if (hitPoints <= 0 && enemy == true)
     { 
         Instantiate(explosionPrefab, transform.position, transform.rotation);
         Destroy(gameObject);
         Invoke("YouWin",1);
         
     }

and the function :

 void YouWin() {
     Time.timeScale = 0;
     info.text = "YOU WIN!";
 }

But the timescale doesn't stop, just like what happen when I used WaitForSeconds. Any idea what might cause this?

GoSuNeem · Oct 31, 2011 at 10:23 PM 1

Share

Yeah... sorry should of read your script more carefully ;P

the code----- Destroy(gameObject); is causing the issue here.

When you destroy the object it stops the code at that point. so invoke never gets called.

1 of the few things you can do is just simply hiding your object. but i don't think you can do gameObject.enable = false because i think that also turns off your script. you can just try to turn the alpha of your texture 0 which is pretty hacky :[

If you could, try flipping the invoke function and the destroy function. It might give an error but doesn't hurt to try ;]

Edit: @aldonaletto good answer on dat ;D Votes!

meazant · Oct 31, 2011 at 10:31 PM 0

Share

LOL! That's exactly it! How could I not seen this.. LOL. Thank you so much for your help. Really appreciate it!

GoSuNeem · Oct 31, 2011 at 10:33 PM 0

Share

did switching the order work? or did it just throw an error? just wondering.

meazant · Oct 31, 2011 at 10:39 PM 0

Share

Yeah it worked. But in the end I deleted the Destroy line. I do still need some function from the script.

Show more comments

Answer 2

Answer by aldonaletto · Oct 31, 2011 at 10:28 PM

You're destroying the gameobject to which this script is attached, thus nothing more will happen. If you really want to suicide this object, the instructions after Destroy should be in another script, attached to another object.

       ...
       Destroy(gameObject); // <- this object (and this script) get destroyed
       // this yield may start executing, but before the next update
       // the whole script will disappear
       yield return new WaitForSeconds(1);
       Time.timeScale = 0; // NO, this didn't happen also.
       info.text = "YOU WIN!"; //NO.
    }

Add comment · Show 1 · Share

meazant · Oct 31, 2011 at 10:33 PM 0

Share

Yeah, you're right! I'm such a noob for letting something like this happen. Thank you for you answer. Appreciate your time :)

OnCollisionEnter as IEnumerator problem (WaitForSecond)

2 Replies

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions