koobas.hobune.stream
detect a trigger one time per collision
In my game there are 2 players, Player1-a and Player2, when the players collide, the text on each one of them is changing (Player1-a is Player1 and Player2 is Player2-a). The problem is that it keeps changing texts while the players are colliding (it can switch the texts 2 times for one collision) and i want it to change the texts only one time per collision. And I also need that after a collision it wont be able change texts for 5 seconds because if they will collide again after 1 second it will change the texts again). This is the player1 collision action:
void OnTriggerEnter2D(Collider2D other)
{
if (other.CompareTag("TriggerOn"))
{
if (firstPlayerText.text == "Player1-a")
{
firstPlayerText.text = "Player1";
secondsPlayerText.text = "Player2-a";
}
}
}
and this is the collision action of the other player:
void OnTriggerEnter2D(Collider2D other)
{
if (other.CompareTag("TriggerOn2"))
{
if (secondsPlayerText.text == "Player2-a")
{
firstPlayerText.text = "Player1-a";
secondsPlayerText.text = "Player2";
}
}
}
By the way I also want that after the collision, the player2 with the new text (player2-a) wont be able to move for 5 seconds.
When two objects collide with each other, both receive the collision information.
So, the best practice is to have only one of those patterns :
object minds its own business, does things to itself but leaves the other one alone
object does things to the other object, but does nothing to itself
Or you can also use if (gameObject.GetInstanceID() < other.gameObject.GetInstanceID()) to do things only on one of the two by comparing their InstanceID which will always be unique. As GetInstanceID() has a cost, you can also do it only when (gameObject.tag == other.gameObject.tag). Like :
if (gameObject.tag != other.gameObject.tag || gameObject.GetInstanceID() < other.gameObject.GetInstanceID())
{
// we're different or I was first, I handle collision
}
