Do something only "for" Gameobjects in trigger

Questions & Answers
1

Hey, I want to do something few times (in for) but only for gameobjects in trigger. (I’m using tag to determine gameobjects but I can’t use OnTriggerEnter etc.)
If something in this for will make gameobject leave the trigger i don’t want it to participate in the next for. What should I use? ///// P.S. I don’t need to use trigger if there’s something better but idea is to randomly pick gameobject from the gameobject[] and teleport it somewhere in 1st “for” and don’t use it in next “for” so it’ll not be picked again.

2

So If I’m understanding this right you want to keep track of every GameObject that is touching a trigger, then pick a random item from this list of items, and then delete it from the list.

Your question isn’t exactly worded clearly but assuming that’s it, this is what I would do:

I’m not sure why you can’t use OnTriggerEnter, it’s the simplest way to tell if one thing is in the collision of another, so I would make something like this:

using System.Collections.Generic;
using UnityEngine;

public class ObjList : MonoBehaviour
{
    public static List<GameObject> objects; // stores the objects currently in contact with the trigger

    private void OnTriggerEnter(Collider2D collision)
    {
        if (collision.gameObject.CompareTag("Object")) // If the object is tagged as an object
        {
            objects.Add(collision.gameObject); // Add the Object to the List
        }
    }


    private void OnTriggerExit(Collider2D collision)
    {
        if (collision.gameObject.CompareTag("Object")) // If the object is tagged as an object
        {
            objects.Remove(collision.gameObject); // Remove the Object from the List
        }
    }
}

That should track objects tagged “Object” currently touching the object and keep them in a list called objects. Then to select a random object from that list and remove it, write a function like this:

private GameObject PickRandom()
{
    System.Random rnd = new System.Random();
    int index = rnd.Next(0, (objects.Count)-1);
    return objects[index];
    }

And now you can use PickRandom() to pick a random GameObject from the ones currently touching the GameObject this script is on. From there you can teleport that Object or co whatever you need to iy