Finally got to try this. Does this make anymore sense to you @bghgary? Maybe it is trying to reference an array of functions after it has been destroyed/nulled??.
Using the falback js decoder the error stack is:
draco_decoder_gltf.js:25 Uncaught TypeError: l[o[((o[(a >> 2)] + 4) >> 2)]] is not a function
at tb (draco_decoder_gltf.js:25)
at Module._emscripten_bind_Mesh___destroy___0 (draco_decoder_gltf.js:35)
at Mesh.destroy.Mesh.destroy (draco_decoder_gltf.js:35)
at Object.destroy (draco_decoder_gltf.js:35)
at fh (b9f22697-73e5-4160-9d2d-79b8badee94d:1)
at b9f22697-73e5-4160-9d2d-79b8badee94d:1
at Object.Module.then (draco_decoder_gltf.js:35)
at onmessage (b9f22697-73e5-4160-9d2d-79b8badee94d:1)
tb @ draco_decoder_gltf.js:25
Module._emscripten_bind_Mesh___destroy___0 @ draco_decoder_gltf.js:35
Mesh.destroy.Mesh.destroy @ draco_decoder_gltf.js:35
destroy @ draco_decoder_gltf.js:35
fh @ b9f22697-73e5-4160-9d2d-79b8badee94d:1
(anonymous) @ b9f22697-73e5-4160-9d2d-79b8badee94d:1
Module.then @ draco_decoder_gltf.js:35
onmessage @ b9f22697-73e5-4160-9d2d-79b8badee94d:1
KHR_draco_mesh_compression.ts:99 Uncaught (in promise) Error: /meshes/2/primitives/0: Uncaught TypeError: l[o[((o[(a >> 2)] + 4) >> 2)]] is not a function
at KHR_draco_mesh_compression.ts:99
at async Promise.all (/WebXR/index 0)
at async Promise.all (/WebXR/index 0)
at async Promise.all (/WebXR/index 2)
at async Promise.all (/WebXR/index 0)
at async Promise.all (/WebXR/index 0)
at async Promise.all (/WebXR/index 0)
Not sure how to do that. In the code snippet I included above the error is being trapped in KHR_draco_mesh_compression.ts and then rethrown as a new error. I would need to modify my cached version of that code but I donât know how to.
Ok, I have figured out how to modified the cached version and replaced the throw of a new error with âthrow errorâ, and it seems to be coming from the last line of this snippet - in a (mangled) function called fh(e, t, i, n, r):
try {
var l = c.GetEncodedGeometryType(o);
switch (l) {
case e.TRIANGULAR_MESH:
a = new e.Mesh,
s = c.DecodeBufferToMesh(o, a);
break;
case e.POINT_CLOUD:
a = new e.PointCloud,
s = c.DecodeBufferToPointCloud(o, a);
break;
default:
throw new Error("Invalid geometry type " + l)
}
if (!s.ok() || !a.ptr)
throw new Error(s.error_msg());
At least I am making progress and learning some bits along the way.
You shouldnât have to modify the code. In the browser, there is usually a way to stop at an exception (even if it is caught). But yeah, this error is from Dracoâs code.
I have raised an issue on the Draco github - issue 662 - so I will see if they can suggest anything.
In prepping for that issue I exported the model again from Blender with a lower compression level and without shape keys and skinning (because when I viewed the model in a validator it said it was a valid model but had a warning about empty skinning or some such). This new model works so it might be either the skinning or compression level (previously I used 6 this time I used 3).
Anyway, hopefully that will be enough information for them to suggest somethingâŚin any event I have a model that works on mobile albeit without the animation working properly.
Yeah it loads fine in Donâs viewer. It does give the same 3 warnings about NODE_SKINNED_MESH_NON_ROOT. I saw these warnings in the GLTF Validation block in the Inspector in the BJS sandbox which is what led me to export without skinning which gave me a model that would load on mobile without the error but without the animations having an effect. I have detailed this in the draco issue and I am pretty sure it must be something to do with the animation/skinning.
Sorry I should have been more specific. The model with the skinning. But I could only triy it on PC, I couldnât get Donâs viewer to load the model on mobile, it just wouldnât give me the option to upload it, the Upload button does nothing and I couldnât work out drag/drop on the phone.
It may not have been the skinning. The other option I changed was compression level from 6 to 3. What I should do is turn on skinning again and try with compression level 3.
