CODEWITHSUNDEEP
c#unity-game-engine
Pookie
Pookie

Reputation: 1279

Trigger not activating in Unity

I am trying to get the scene to switch when a method in the script TrippleBall returns 0. I know it returns 0 at the appropriate time because I have tested it. Here is my code to switch scenes:

void OnTriggerEnter(Collider col)
{
    if (col.gameObject.tag == "ball")
    {
        col.gameObject.GetComponent<Ball>().setIsOffScreen(true);
      /*error*/ if (GameObject.Find("TrippleBalls").GetComponent<TripleBall>().getBallCount() == 0) {

            Debug.Log("Loading next screen...");
            SceneManager.LoadScene("GameOverScene");
        }

    }

}

Here is an image to show where TrippleBalls is

enter image description here

The script TrippleBall is in the component TrippleBalls

Here is an image to show where the code above is located.

enter image description here

The code above is in a class called SceneTrigger which has been put in LBackBoard and RBackBoard

When I test the code, and the getBallCount returns 0 (to satisfy the condition above) I get the following error:

Object reference not set to an instance of an object

This error line sends me to where i marked error in the code above.

If anyone can help me figure this out, that would be awesome. Thank you!

Upvotes: 0

Views: 81

Answers (1)

Programmer
Programmer

Reputation: 125455

You GameObject is named TrippleBall in the Scene but you are looking for TrippleBalls in the Scene. Simply change GameObject.Find("TrippleBalls") to GameObject.Find("TrippleBall");.

Also Don't use GameObject.Find in the OnTrigger function. It will slow down your game.Cach TripleBall in a local variable then you can re-use it.

TripleBall myTripleBall = null;

void Strt(){
//Cache TripleBall
myTripleBall = GameObject.Find("TrippleBalls").GetComponent<TripleBall>()
}

Now you can re-use it any time.

void OnTriggerEnter(Collider col)
{
    if (col.gameObject.tag == "ball")
    {
        Debug.Log("COUNT IS: "+myTripleBall.getBallCount());
        col.gameObject.GetComponent<Ball>().setIsOffScreen(true);
        if (myTripleBall.getBallCount() == 0) {

            Debug.Log("Loading next screen...");
            SceneManager.LoadScene("GameOverScene");
        }
    }
}

Make sure to Add the GameOverScene scene in your Build Setting. enter image description here

Advice: Advice for you is that when Looking for another GameObject inside another GameObject, Use '/' like you would in a folder path. For example, TrippleBall is under Specialties GameObject. So use GameObject.Find("Specialties/TrippleBall"); instead of GameObject.Find("TrippleBall");

Upvotes: 3

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