Unity 3D: Loading FBX dynamically using AssetBundle

Question

i am trying to load an already created FBX object into the scene at runtime, i searched around and found that assetbundle can be used to do so. I tried this code but it doesnt seem to instantiate the object in the scene and neither does it pop an error.

Here is the code

using System;
using UnityEngine;
using System.Collections;

public class CachingLoadExample : MonoBehaviour {
    public string BundleURL;
    public string AssetName;
    public int version;

    void Start() {
        StartCoroutine (DownloadAndCache());
    }

    IEnumerator DownloadAndCache (){
       // Wait for the Caching system to be ready
       while (!Caching.ready)
            yield return null;

        // Load the AssetBundle file from Cache if it exists with the same version or download and store it in the cache
        using(WWW www = WWW.LoadFromCacheOrDownload (BundleURL, version)){
            yield return www;
            if (www.error != null)
                throw new Exception("WWW download had an error:" + www.error);
            AssetBundle bundle = www.assetBundle;
            if (AssetName == "")
                Instantiate(bundle.mainAsset);
            else
                Instantiate(bundle.Load(AssetName));
            // Unload the AssetBundles compressed contents to conserve memory
                    bundle.Unload(false);

        } // memory is freed from the web stream (www.Dispose() gets called implicitly)
    }
}

I added a new empty game object, dragged the C# code to that game object, supplied the asset bundle link "file://C:/Users/Sahibzada/Documents/New Unity Project/Assets/100777102370.FBX" but no luck

Can someone please guide me, whats wrong with the code, i am totally new with scripting in Unity, Thanks

Define "no luck". What specifically isn't happening as expected? Are you seeing any error messages? Did you check the console? Are you sure you're using Unity Pro? — rutter
No error pops up, and neither does an object gets added to the scene, the FBX object i am referring to in the BundleURL. — Junaid Noor
Perhaps Caching.isReady is never returning true? Also: are you sure you're using Unity Pro? It's required for use with asset bundles. — rutter

3lcolmo 3lcolmo · Accepted Answer · 2016-05-11T10:17:12

Create a folder named AssetBundles inside your Assets folder, then you need to create the AssetBundle of your FBX with an Editor script as show in: http://docs.unity3d.com/Manual/BuildingAssetBundles.html

using UnityEditor;

public class CreateAssetBundles
{
     [MenuItem ("Assets/Build AssetBundles")]
     static void BuildAllAssetBundles ()
     {
         BuildPipeline.BuildAssetBundles ("Assets/AssetBundles");
     }
}

Lastly you need to introduce, in the BundleURL the URL to the new AssetsBundle:

"file://C:/Users/Sahibzada/Documents/New Unity Project/Assets/AssetsBundles/yourassetbundle"

and on the AssetName you need to introduce "yourassetbundle"

I also recommend not having paths with spaces, this can also be an issue.

Unity 3D: Loading FBX dynamically using AssetBundle

1 Answers