Instantiate inactive,Making a GameObject active/instantiate

Questions & Answers
1

Noob question for my first project.

I want to make a GameObject ‘bigBrother’ appear when another two objects collide.

I’ve been trying to do this by having it inactive and using SetActive with an if statement, but I can’t make it work and I realised I can’t even do this without the If statement, not even with a script that says nothing else but SetActive on Start or Wake or Update… I thought that perhaps it is because Unity can’t see objects that are inactive at the start of the game, and some forum posts suggest making the inactive prefab a child of an active empty (Enabling a disabled prefab in the scene - Questions & Answers - Unity Discussions) but this doesn’t seem to make a difference.

So I figure SetActive is not the way and I am trying out Instantiate. This works insofar as it creates a clone in the game but one that is inactive and I can’t get it to activate! I have seen examples of code that just say SetActive.‘name of prefab’ that are supposed to activate the just instantiated clone, but maybe I need to refer to the clone specifically? The in-game name is suffixed with ‘(clone)’

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


public class SpawnBigBrother : MonoBehaviour
{
    public GameObject bigBrother;
        void OnCollisionEnter(Collision col)
    {
        if (col.gameObject.name == "Wall")
            {
                Instantiate(bigBrother);
                bigBrother.SetActive(true);
        }
    }
}
2

Instantiate(bigBrother) creates a clone of the bigbrother object, then with bigBrother.SetActive(true); you activate whatever is your original bigBrother object, not the cloned object. Try this:

GameObject clone = Instantiate(bigBrother) as GameObject;
clone.SetActive(true);
3

Oh yeah that looks useful as it defines the name rather than let it be auto generated - that will be much more better for my intended use.

4

Is your bigBrother game object already in the scene? If it is, then you just need to do: bigBrother.SetActive(true); when the object’s collide

If you want to spawn your bigBrother object into the scene, when you instantiate, you do not save the created game object to a variable, so you cannot access it and set it to active. This will create a game object and set it to active. Instantiate also has parameters to set the position, rotation, and parent of the created game object. Add those, if needed

GameObject clone = Instantiate(bigBrother);
clone.SetActive(true);