Instantiate a prefab and another object as its child

🌵 Needle Engine
1

I want to instantiate a prefab assigned from the unity and instantiate another model from url as its child.

2

To instantiate a prefab in Unity and load another model from a URL as its child, follow these steps in your code:

  1. Instantiate the Prefab: Use Unity’s Instantiate() method to create the prefab in your scene.
  2. Load the Model from URL: Use a web request to fetch the model, and then instantiate it as a child of the previously created prefab.

Here’s a pseudocode outline of the operation:

1. Specify the prefab you want to instantiate.
2. Use Instantiate(prefab) to create an instance in the scene.
3. Define the URL of the model you want to load.
4. Use an async method to fetch the model from the URL.
5. Convert the loaded model into a GameObject.
6. Set the instantiated model as a child of the prefab instance.

Now, here’s a basic code example to demonstrate this in C#:

using UnityEngine;
using UnityEngine.Networking;

public class PrefabLoader : MonoBehaviour
{
    public GameObject prefab; // Assign your prefab in the inspector

    void Start()
    {
        InstantiatePrefabWithChild("https://example.com/path/to/your/model.glb");
    }

    void InstantiatePrefabWithChild(string modelUrl)
    {
        // Instantiate the prefab
        GameObject prefabInstance = Instantiate(prefab, Vector3.zero, Quaternion.identity);

        // Load the model from the URL
        StartCoroutine(LoadModelFromUrl(modelUrl, prefabInstance.transform));
    }

    IEnumerator LoadModelFromUrl(string url, Transform parent)
    {
        // Fetching the model
        using (UnityWebRequest www = UnityWebRequestAssetBundle.GetAssetBundle(url))
        {
            yield return www.SendWebRequest();

            if (www.result != UnityWebRequest.Result.Success)
            {
                Debug.LogError(www.error);
            }
            else
            {
                // Assuming here we get an AssetBundle
                AssetBundle bundle = DownloadHandlerAssetBundle.GetContent(www);
                var loadedModel = bundle.LoadAsset<GameObject>("ModelName"); // Replace with the name of the model
                GameObject modelInstance = Instantiate(loadedModel, parent);
                modelInstance.transform.SetParent(parent); // Set as child
            }
        }
    }
}

Make sure to replace "https://example.com/path/to/your/model.glb" with the actual URL of your model and adjust "ModelName" to match the name of the asset in the bundle.

Let me know if you need further assistance or adjustments!

3 replies left
thread_mwXVZLmQ0NKWs98Biwm0Xu3C
Reply to this message to continue the conversation

3

Show something in ts not in c#

4

Thinking :thinking:
thread_mwXVZLmQ0NKWs98Biwm0Xu3C

1 Like