So I am making a 2D top down shooter similar to Asteroids. I want to add some stars as background and I want them to be generated dynamically in my code. Since there are no boundaries to where the player can go and I don’t want to have thousands of stars on my scene, I made so the stars destroy themselves when they are not visible by the camera. Now here is my problem: I created a variable to count the number of stars, the idea being that whenever I destroy one star, I generate another one immediately. Seems simple enough and yet…
So here are my two class: one is attached to the star itself and the other(StarHandler) is attach to an empty game object.
public class Star : MonoBehaviour
{
public StarHandler starHandler;
private bool hasBeenVisible = false;
private void OnBecameVisible()
{
hasBeenVisible = true;
}
private void OnBecameInvisible()
{
if (hasBeenVisible)
{
Destroy(gameObject);
starHandler.RemoveStar();
}
}
}
This is the the class attached to the sprite, it check if the star is still in the camera and if not, it destroys it and call a the removeStar function in StarHandler.
public class StarHandler : MonoBehaviour
{
public GameObject player;
public GameObject pfStar;
private int nbOfStar = 0;
void Start()
{
Debug.Log(nbOfStar + " Debug 1");
// This one shows 0 as intended
AddStar(10);
}
void AddStar(int starNb)
{
for (int i = 0; i <= starNb; i++)
{
Vector2 pos = new Vector2(Random.Range(-9, 9), Random.Range(-5, 5));
GameObject star = Instantiate(pfStar, pos, Quaternion.identity);
Debug.Log(nbOfStar + " Debug 2");
// this one shows 0 as it is supposed to
}
nbOfStar += starNb;
Debug.Log(nbOfStar + " Debug 3");
// This one shows 10 as it is supposed to
}
public void RemoveStar()
{
nbOfStar--;
Debug.Log(nbOfStar + " Debug 4");
// this one is weird, the value seems to decrease each time I try the game. I tried to reset the
// component in the inspector but it changes nothing. The value is always negative and can range form -250 to
// -1050 and possibly more, it seems somewhat random to me.
}
void Update()
{
Debug.Log(nbOfStar + " Debug 5");
// This one is weird too. The nombre of star will increase up to 35 in console just as intended,
// and then nothing that I have tried as managed to change the number.
// I can destroy every star in the game and still the console will show me 35...
if(nbOfStar < 35)
{
Vector2 pos = new Vector2(Random.Range(player.transform.position.x + 9, player.transform.position.y - 10),
Random.Range(player.transform.position.x + 18, player.transform.position.y + 10));
GameObject star = Instantiate(pfStar, pos, Quaternion.identity);
nbOfStar++;
}
}
}
This is the second script, I have put comments bellow all the Debug.Log() so you can better understand the problem I face.
