Dynamically create GameObject

Unity Engine
,
1

Hello everyone,

I am working on a project in Unity with Meta VR, in which I have to load an AssetBundle (which cointains my object) into the scene at runtime.

I have a script that works and loads the object correctly, but in order to make the object appear in the scene, I have to create a new GameObject manually in the Hierarchy and then assign my scritp to it. I want to know if there is a way to avoid this step of “manually” creating the gameobject and assigning the script to it; I want to make everything from script without a lot of manual actions in unity.

Thanks in advance, this is the script that I use to load the assetbundle from a local file in my PC.

using System.Collections;
using UnityEngine;
using UnityEngine.Networking;

public class DownloadAssetBundleSimplifyWay : MonoBehaviour
{
    // Percorso del file locale
    public string filePath = "C:/Users/nicol/OneDrive/Desktop/MAGISTRALE/Comp graphics/Progetto/ProvePrefab/myfirstassetbundleprefab";

    // Start is called before the first frame update
    public void Start()
    {
        StartCoroutine(DownloadAssetBundleFromLocal());
    }

    private IEnumerator DownloadAssetBundleFromLocal()
    {
        GameObject go = null;

        using (UnityWebRequest www = UnityWebRequestAssetBundle.GetAssetBundle(filePath))
        {
            yield return www.SendWebRequest();

            if (www.result == UnityWebRequest.Result.ConnectionError || www.result == UnityWebRequest.Result.ProtocolError)
            {
                Debug.LogWarning("Error on the get request at " + filePath + " " + www.error);
            }
            else
            {
                AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(www);
                go = bundle.LoadAsset<GameObject>(bundle.GetAllAssetNames()[0]) as GameObject;
                bundle.Unload(false);
                yield return new WaitForEndOfFrame();
            }

            www.Dispose();
        }

        InstantiateGameObjectFromAssetBundle(go);
    }

    private void InstantiateGameObjectFromAssetBundle(GameObject go)
    {
        if (go != null)
        {
            GameObject instanceGo = Instantiate(go) as GameObject;
            instanceGo.transform.position = Vector3.zero;
        }
        else
        {
            Debug.LogWarning("Your asset bundle GameObject is null");
        }
    }
}

Thanks in advance.

2

The GameObject from the bundle is a prefab. You have to instantiate it in order to have it in the scene. There is no way around instantiating a prefab.

You could instead create a scene with the game object already instantiated, and add that scene to the AssetBundle. Then additively load that bundled scene.