problem with instantiate

Questions & Answers
1

Hey guys, i’m making a 2D game but i’have problem with my enemy shoot, when he instantiate a bullet, he instantiate many bullet but i would like one by one, this is the code of the enemy :

function OnTriggerStay(col : Collider) { if(col.gameObject.tag == "Player") { Instantiate(lazerBullet, shooter.transform.position, lazerBullet.transform.rotation); } }

and the code of the bullet :

//var perso : Transform;
var shootSpeed : int;

function Start ()
{
	
}

function Update ()
{
	var shoot = Time.deltaTime * shootSpeed;
	transform.Translate(0,-shoot,0);
}
3

Perhaps try this?

var shootSpeed : int;
// Set in Editor to be how many shots are fired per second
var shotsPerSecond : float;
private var shotTimer : float;
private var shotTimerElapsed : float;

function Start ()
{
    shotTimer = 1 / shotsPerSecond;
    shotTimerElapsed = 0;
}
 
function Update ()
{
    shotTimerElapsed = shotTimerElapsed + Time.deltaTime;
}

function OnTriggerStay(col : Collider)
{
    if (col.gameObject.tag == "Player") { 
        if (shotTimerElapsed >= shotTimer)
        {
            shotTimerElapsed = 0;
            Instantiate(lazerBullet, shooter.transform.position, lazerBullet.transform.rotation);
        }
    }
}

You don’t really want to be increasing a timer in a collision or trigger event since it can happen multiple times in the same frame depending on how many things are colliding in that frame.

2

OnTriggerStay will repeatedly activate as long as the collider is touching. You could add in a delay, such as:

var delay = 0.0;
var delayAmount = 1.0;

function OnTriggerStay(col : Collider)
{
    if (col.gameObject.tag == "Player" && Time.time > delay)
    {
        delay = Time.time + delayAmount;
        Instantiate(lazerBullet, shooter.transform.position, lazerBullet.transform.rotation);
    }
}

That way, you’ll force it to wait (in this case) a second before firing again.

4

it WORK’s, thank you so much dude and sorry if my english is not well, i’m French lol