**Three property binding failed to load animation track** gltf loader, morph targets

[BryanChrisBrown]

I'm currently getting an issue when trying to load a glb file that I converted into a jsx element. I am getting the following error when I try to play it.

THREE.PropertyBinding: Trying to update property for track: <AnimationName>.morphTargetInfluences but it wasn't found.

After testing with multiple models on sketchfab it appears to be a problem with using morph targets.

Models currently exported from sketchfab that were imported using the alembic file type reproduce this issue. https://sketchfab.com/search?features=downloadable+animated&q=alembic&sort_by=-relevance&type=models

Models that do not use morph targets do not have this issue.

Expected, object animates

Current Result, error is thrown.

Is there a workaround for this? These models animate correctly using donmccurdy's gltf viewer: https://gltf-viewer.donmccurdy.com

[gsimone]

Can you share a reproduction on codesandbox?

[BryanChrisBrown]

https://codesandbox.io/s/r3f-basic-demo-8klcn?file=/src/PathDeform.js

Here's a link to a sandbox that reproduces the issue.

[drcmda]

must be some gltfjsx export issue, using primitive works: https://codesandbox.io/s/r3f-basic-demo-mz0im

r3f does nothing to support or disallow animations, that's purely threejs. it may be that in order to have it declaratively it's missing a prop or whatever, but im only a beginner when it comes to three animations so i dont know what it is.

this box does the same thing as yours and it's working: https://codesandbox.io/embed/r3f-gltf-fonts-c671i

if you figure out what's missing i can put it into gltfjsx.

[BryanChrisBrown]

Thanks Paul! I'll try to figure out what's missing and let you know!

[BryanChrisBrown]

So after taking a look at the example you showed, I was able to fix the gltf-jsx.

The file was missing the "name" property, adding that solved the problem.

https://codesandbox.io/s/r3f-basic-demo-swugm

[drcmda]

interesting, so it needs the name? i think gltfjsx strips it by default, but it should probably retain names if animations are exported.

[drcmda]

published a gltfjsx patch, hopefully that does it.

[BryanChrisBrown]

patch worked, thanks for updating it!

I think it only needs the name in regards to morph target animations. Animations that don't use morph targets seem to work without the patch. I only tested one non morph target model.