solved getMeshByName Undefined Except ImportMesh

[VoyVoda]

Hello to everyone,

I believe it's a simple question, but I can't find the answer. This is what I want to do. I am adding a design to my scene with ImportMesh. I want to reach object106 using getMeshByName. Here's my code.

These are also the outputs of the inspector.
I can access object106 with getMeshByName in ImportMesh. But it is undefined outside ImportMesh.

This first output in the inspector:

2nd output:

What is the reason of this? Why undefined?

And My 2nd written console log why did work before?

Additional:

I wanted to add a click to object106. But this isn't working. No alert ?

[JohnK]

1 hour ago, VoyVoda said:

I can access object106 with getMeshByName in ImportMesh. But it is undefined outside ImportMesh.

When using SceneLoader.ImportMesh  before you can access any mesh stored in the file that file has to load. The parameter function(newMeshes) {......} is a callback function, that is it is only executed when the file has been loaded. While it is being loaded any code following SceneLoader.ImportMesh will still be executed, which is a call to console.log and as the file has not yet loaded obje106 does not yet exist.

 

1 hour ago, VoyVoda said:

I wanted to add a click to object106. But this isn't working. No alert ?

Cannot see what is wrong here. A version working  in the playground https://www.babylonjs-playground.com/#ARI3S1

[VoyVoda]

1 hour ago, JohnK said:

When using SceneLoader.ImportMesh  before you can access any mesh stored in the file that file has to load. The parameter function(newMeshes) {......} is a callback function, that is it is only executed when the file has been loaded. While it is being loaded any code following SceneLoader.ImportMesh will still be executed, which is a call to console.log and as the file has not yet loaded obje106 does not yet exist.

Thank you for the answer. Just like I thought.

Do you have a solution for the above?

1 hour ago, JohnK said:

Cannot see what is wrong here. A version working  in the playground https://www.babylonjs-playground.com/#ARI3S1

Not working on my project. I've tried it many times. I've refreshed the page a lot. Interestingly, sometimes it works, sometimes it doesn't work. It usually doesn't work. Could there be a problem with getMeshByName?

Edit:

I noticed something new right now. The click does not work when the scene is first loaded. But it works after opening Inspector ?? Really interesting ?

Is there a known reason for this?

[JohnK]

1 hour ago, VoyVoda said:

Do you have a solution for the above?

Not really to do anything with an imported mesh you have to wait for it to load so all code for it has to be in the function(newMeshes) {....}.

Using the assetsManager it is possible to import and store a number of meshes from a variety of files and keep the code that accesses the meshes separate. This code is only run when the assetsManager has finished.

 

Do not know the reason why (probably something to do with skeletons or submeshes) but in the PG I posted if you replace

var rabbit = newMeshes[1];

with

var rabbit = newMeshes[0];

The 'rabbit' loads but is not clickable.

In your project it might be worth replacing

BABYLON.SceneLoader.ImportMesh("", "./design/", "statue.babylon", scene, function (newMeshes) {
        
      obje106 = scene.getMeshByName("obje106");

with

BABYLON.SceneLoader.ImportMesh("obje106", "./design/", "statue.babylon", scene, function (newMeshes) {
        
      obje106 = newMeshes[0];

      console.log(newMeshes);

The console.log to check exactly what is in newMeshes and where!

[VoyVoda]

Thanks again for your reply.

I think I asked my question wrong.
Think of a house in my project. There are many objects in it. I don't want to click on the house. I just want to click on a chair inside this house. The name of this chair is object106. So I want to use getMeshByName.
Think like this: I don't want to completely click on after I import the rabbit. I just want to click on one ear.

[Sebavan]

getMeshByName should work, I do not see any reason why it would not. Can you create a repro in the playground ? 

 

[JohnK]

This will help you to use your assets in the playground https://doc.babylonjs.com/resources/external_pg_assets

[VoyVoda]

I think rawgit no longer supports. I couldn't add the object to the playground. But what I want is this: I want to click on the front sail.

like this: https://www.babylonjs-playground.com/#IRRN4C

I want to click on the front sail of the yacht in this picture. This sail's name is "obje128"

[JohnK]

Disappointing about rawgit.

A couple of things in your playground

1. you assign obje106 to mesh named obje128  so console.log(obje128) will always be undefined.

2. you cannot load directly from github but you can the raw file

3. The console.log outside the import loop will always give you undefined.

So here we have the yacht loading but not all the textures (we will need to find a replacement for rawgit)

https://www.babylonjs-playground.com/#IRRN4C#1

[VoyVoda]

Thank you very much for the answers.
For rawgit I'll also try to find a replacement.

Everything is fine for now. Only one problem remained. I mentioned above. I want to click on only 1 object in this complex design. Not the click yacht. I just want to click on the front sail.

Here I left a sample right here: https://www.babylonjs-playground.com/#IRRN4C#2

I'll mark this problem as resolved after fixing it.

 

I respect you for the answers. Thanks again ?

[Sebavan]

obj needs to be pickable for it to work:

https://www.babylonjs-playground.com/#IRRN4C#3

[VoyVoda]

That's it!
Thank you. I'm very careless. It's that simple, but I didn't see it. Problem solved, thanks.

Correct if I'm wrong:
1- With ImportMesh, the object contained in getMeshByName from a complex design is defined only in ImportMesh? Other than ImportMesh is undefined.
2- To click on anything in a complex design added to the stage, mesh.isPickable = true; we need to add

[Sebavan]

1 - it is defined on the scene after the import succeeded

2 - Yup it is better to limit the number of pickable obj for perf