noob question: .babylon -> .gltf tool

[HoloLite]

Noob question: do we have .babylon -> gltf conversion tool ? 

I am trying to convert some existing scene in .babylon format into gltf.

Thanks

 

[Guest]

Yes you can

Thanks to our wonderful gltf serializer: https://github.com/BabylonJS/Babylon.js/tree/master/serializers/src/glTF/2.0

You can load the scene in babylonjs and then call BABYLON.GLTF2Export.GLTF(scene)

[HoloLite]

@Deltakosh

I just tried the api, but getting the following popup error during the api call.

First I loaded the scene from .babylon format, and this step actually succeeded. The scene was displayed.

Then called the converter. Here is my call:

   BABYLON.GLTF2Export.GLTF(scene, "mygtlft");

 

[Guest]

Can you provide a repro in the PG?

@kcoley will comment soon:)

[HoloLite]

@Deltakosh I just created the PG: http://www.babylonjs-playground.com/#I74IFH#4

See the console log for errors.

The call to  BABYLON.GLTF2Export.GLB(this.scene, "mygtlft") throws exception with the following error message:

1. HTML1300: Navigation occurred.
   www.babylonjs-playground.com (1,1)
2.  
   BJS - [09:55:43]: Babylon.js engine (v3.2.0-alpha10) launched
   babylon.js (4,7860)
3.  
   converting to glb...
   eval code (13) (18,13)
4. BJS - [09:55:46]: default material: Standard Material is currently not fully supported/implemented in glTF serializer
   babylon.js (4,8035)
5. BJS - [09:55:46]: default material: Back-face culling enabled and two-sided lighting disabled is not supported in glTF.
   babylon.js (4,8035)
6. BJS - [09:55:46]: SkyCarLightGlows: Standard Material is currently not fully supported/implemented in glTF serializer
   babylon.js (4,8035)
7. BJS - [09:55:46]: SkyCarLightGlows: Back-face culling enabled and two-sided lighting disabled is not supported in glTF.
   babylon.js (4,8035)
8. BJS - [09:55:46]: Unable to load from https://raw.githubusercontent.com/hololite/gltf-samples/master/babylonjs/car/MyScene.babylon: Error in onSuccess callback
   babylon.js (4,8230)
9. WEBGL11046: INVALID_ENUM: framebufferTexture2D: Invalid or unsupported texture target
   babylon.js (8,11324)
10. WEBGL11088: INVALID_FRAMEBUFFER_OPERATION: readPixels: No attachments present
    babylon.js (8,11779)

The 'conversion done' log is never generated.

[kcoley]

Hi @HoloLite, thanks for setting up the playground.  I'll look into this now.

[HoloLite]

Sorry, the PG has been updated, please use this: http://www.babylonjs-playground.com/#I74IFH#4

[kcoley]

No problem!  I'll load that playground .

[davrous]

I've got a similar issue with this PG: http://playground.babylonjs.com/#QGS3UQ#2

if it can help you debugging  

 

[kcoley]

I found the issue and am working on a fix now. 

[kcoley]

I committed the fix for the export issues .  I am working on a final texture conversion from specular glossiness to metallic roughness, which I plan on having completed tomorrow.  I'll update when that is ready!

Thanks for the playgrounds, which helped me troubleshoot this!

 

[kcoley]

Specular glossiness to metallic roughness conversion was recently merged, which should support PBRMaterials.  Feel free to create an issue on GitHub if you run into problems.

I am tracking features for the glTF serializer here: https://github.com/BabylonJS/Babylon.js/issues/3601

Thanks!

[HoloLite]

@kcoley, I've move things around in my git rep, so the scene url has changed and might break the PG in the near future.

Here is the update PG with the correct scene url.

http://www.babylonjs-playground.com/#I74IFH#5

I just tried the PG now, I don't see the error popup yet, but looks like the call is still throwing exception inside ?

I don't see the 'conversion done' trace being logged on the console.

[kcoley]

Hi @HoloLite,

I made a few tweeks to your playground to get it to work:

http://playground.babylonjs.com/#8BNBM9

To use the glTF serializer, the scene must be completely loaded first, so I added the executeWhenReady callback.  Also, to prevent including the skybox in the scene, I defined a shouldExportMesh option, which excludes meshes from being included in the final glTF scene.  Let me know if that makes sense.

[HoloLite]

Nice work! Thanks. Yeah the callback made sense. I just ran it and use the Builder 3d to view the generated gltf.

Will this be in the next alpha?