Dynamic import of collada asset

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Hi everybody.

I absolutely need to import a collada (.dae) asset dynamically through a script. Dynamically because I'm building an application which models a mesh accordingly to some user input, so I cannot recompile in Unity.

I tried to use AssetBundles but I'm quite a newbie in Unity, maybe I'm missing some important point.

Here my few lines of code, the script is attached to a empty game object in unity. Basically I want to import the collada asset in the path and put the object "monkey" inside the scene. :-|

WWW urlExternalAsset = new WWW("file://D:/Unity/monkey.dae"); GameObject go; void Start () { AssetBundle bundle = urlExternalAsset.assetBundle; go = bundle.Load("monkey", typeof(GameObject)) as GameObject; Instantiate(go); }

Thank you for your help. I'm doing a project with my university and this part is fundametal for me;)

Luca

Answer 1

Answer by ricardo_arango · Apr 27, 2012 at 05:17 PM

To use AssetBundles you need to:

1 Build an AssetBundle that includes the Monkey Asset. Note that this is not the collada file, but the Asset that you see in the Project folder. The instructions to do that you can find in these places:

http://unity3d.com/support/documentation/Manual/AssetBundles http://unity3d.com/support/documentation/ScriptReference/BuildPipeline.BuildAssetBundle.html

*Note: The file extension for the AssetBundle is not important.

2 Put that AssetBundle file in a location where you will load it from:

D:/Unity/monkey.assetbundle

3 Download the AssetBundle using the WWW class:

 IEnumerator Start (){
    WWW urlExternalAsset = new WWW("file://D:/Unity/monkey.assetbundle");
    yield return www;
 
    // 4. Retrieve the AssetBundle from the WWW object:
    AssetBundle bundle = urlExternalAsset.assetBundle;
 
    // 5. Load the Mokey GameObject from the AssetBundle:
    GameObject go = bundle.Load("monkey", typeof(GameObject)) as GameObject;
 
    // 6. Instantiate the GameObject:
    Instantiate(go);
 }

Enjoy!

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Eldamir88 · Nov 20, 2019 at 03:04 PM 0

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This does not address the "dynamic" part. The app is already running, and doesn't have access to the Unity Editor. It can pickup the DAE file from disk, but how does it turn into a GameObject? I have read in another place that the DAE parser is part of the Editor, not the app runtime, so the functionality that turns a DAE file into an asset is not accessible outside of the Unity Editor. But then how can it be done?

Can the unity editor be controlled through scripts to sit in the background and build AssetBundles on request?

Answer 2

Ok. I think that what I've done is just what you described in point 3.

I can't understand the meaning of what is described in the first 2 points...what does build the asset bundle mean? Considering that I'm creating the .dae file runtime I need to load it also runtime in a previously built file. I can't launch the unity editor, I can just use scripts.

I will try to summarize of does my pipeline work

I have a C# program continuosly getting infos from a Kinect
On the other side, I have a unity .exe (which I already created), that shows a 3d avatar.
After an acquisition phase I stop getting data from the Kinect and I run the previously built Unity .exe, which should use the data acquired runtime to build the 3d world. I did it successfully with textures...now I want to apply the same procedure also to meshes. --> That's why I need to import collada .dae dynamically.

Do you think this is possible with AssetBundles? What could use if not?

Thank you so much.

Luca

Dynamic import of collada asset

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