Error when loading glTF files exported with Needle in regular three.js

🌵 Needle Engine
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I’m getting this error pretty often when exporting avatars using Needle, using the GLTF loader. Do you think this is a bug with the Needle exporter or the Threejs GLTF loader? Can have a crack at fixing it if it’s the loader. Thanks :blush:

threejs_loader_error.png
threejs_loader_error.png718×169 6.66 KB

Original Post on Discord

by user 617973759852281873

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can send a few models if it helps!

by user 617973759852281873

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Hey there, can you send the full stacktrace of the error? Do you use the default avatar or another one?

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Does it happen when developing locally?
Models would help :slightly_smiling_face:
You could send a small repo (e.g. when your scene is open just click “Help/Needle Engine/zip project” to create a minimal zip with just the assets used in your current scene)

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If you have it uploaded somewhere the link would also help :slightly_smiling_face:

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Have discovered it imports fine if i remove the animator component, before exporting

by user 617973759852281873

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sent you an exported glb

by user 617973759852281873

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Hey, I know that error

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So the thing is that we export with KHR_animation_pointer by default, thus allowing all kinds of animations to be exported (not just transforms that move around)

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We’ve added that to three.js and the PR is open, but hasn’t been merged yet, and what you’re seeing there is that error

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aw cool you’re already onto it! thanks :blush:

by user 617973759852281873

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Right thats possibly it - you can try using our fork for that "three": "github:needle-tools/three.js#needle-dev-5",

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Its three v 144 (soon 145)

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spotted it: GLTFLoader: add arbitrary property animation through KHR_animation_pointer support by hybridherbst · Pull Request #24108 · mrdoob/three.js · GitHub will have a go at adding it to the loader we’re using, thanks!

by user 617973759852281873

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Currently you’ll have to merge at least these two into three core to use it:
unknown.png

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Problem ist that the core is / was not flexible enough to do something as extensive as KHR_animation_pointer, we had to fix a few things there first and add the right callbacks

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Changed the channel name: Error when loading glTF files exported with Needle in regular three.js

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Summary for others finding this thread:

  • Needle Engine uses KHR_animation_pointer by default, which allows animating all properties of a glTF file
  • That extension is not yet supported on three.js main, but it is supported in Babylon, Gestaltor, and our fork of three.js
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Here is our fork GitHub - needle-tools/three.js: JavaScript 3D Library.
Current branch: GitHub - needle-tools/three.js at needle-dev-6

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Pinned a message.