Error reading glb file

[freyatech]

Hi! I'm trying to read glb file with NodeIO read but I keep getting an error:
"Uncaught (in promise) Error: Cannot read properties of undefined (reading 'DT_FLOAT32')".
Any ideas what I might be doing wrong? gltf-transform/cli is able to read and transform the file.

thanks for any info.

[donmccurdy]

DT_FLOAT32 is a Draco constant, it sounds like the file you're trying to load might require Draco decompression? If so, you'd need to use the draco3dgltf npm package and register it as shown here:

https://gltf-transform.donmccurdy.com/classes/extensions.dracomeshcompression.html#example

import { NodeIO } from '@gltf-transform/core';
import { KHRONOS_EXTENSIONS } from '@gltf-transform/extensions';
import draco3d from 'draco3dgltf';

// ...

const io = new NodeIO()
    .registerExtensions(KHRONOS_EXTENSIONS)
    .registerDependencies({
        'draco3d.decoder': await draco3d.createDecoderModule(), // Optional.
        'draco3d.encoder': await draco3d.createEncoderModule(), // Optional.
    });

I had thought that NodeIO gave a clearer error when this dependency was missing though... will take a look at that.

[freyatech]

Hi Don! Thank you for your reply. I’ve tried to implement it both in node and front end but keep getting the same error: Uncaught (in promise) RuntimeError: abort(CompileError: WebAssembly.instantiate(): expected magic word 00 61 73 6d, found 3c 21 44 4f @+0). Build with -s ASSERTIONS=1 for more info. Any ideas? Thanks Lucas

…

On 28 Sep 2021, at 16:49, Don McCurdy ***@***.***> wrote: DT_FLOAT32 is a Draco constant, it sounds like the file you're trying to load might require Draco decompression? If so, you'd need to use the draco3dgltf npm package and register it as shown here: https://gltf-transform.donmccurdy.com/classes/extensions.dracomeshcompression.html#example <https://gltf-transform.donmccurdy.com/classes/extensions.dracomeshcompression.html#example> import { NodeIO } from ***@***.***/core'; import { KHRONOS_EXTENSIONS } from ***@***.***/extensions'; import draco3d from 'draco3dgltf'; // ... const io = new NodeIO() .registerExtensions(KHRONOS_EXTENSIONS) .registerDependencies({ 'draco3d.decoder': await draco3d.createDecoderModule(), // Optional. 'draco3d.encoder': await draco3d.createEncoderModule(), // Optional. }); — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#366 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AMWCBSCMGILHH46LM5FUR5DUEHIX3ANCNFSM5E5QFOFQ>. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.

[donmccurdy]

The draco3dgltf package will only work in Node.js I think. For use on the frontend see this answer. Unfortunately I can't tell much from that error, can you share enough of your code (and build process, if any?) for me to reproduce that?

[freyatech]

Hi! What I'm trying to run it on is electron app with react as UI. As I'm quite new to electron development I'm not sure whether electron's main process is classed as node environment or the whole setup is classed as front end since it's running in Chrome. I've still got few ideas that I want to try, but if that clears the issue for you and you've got some suggestions I'd be extremely grateful. Regards Lucas ⁣Sent from BlueMail ​

…

On 29 Sep 2021, 18:38, at 18:38, Don McCurdy ***@***.***> wrote: The `draco3dgltf` package will only work in Node.js I think. For use on the frontend see [this answer](https://stackoverflow.com/a/66979159/1314762). Unfortunately I can't tell much from that error, can you share enough of your code (and build process, if any?) for me to reproduce that? -- You are receiving this because you authored the thread. Reply to this email directly or view it on GitHub: #366 (reply in thread)

[donmccurdy]

Hm, that's a great question. I would think either WebIO or NodeIO could work in Electron, but I'm not sure. If you just include await draco3d.createDecoderModule(), does that alone throw an error? The second error (WebAssembly.instantiate()) is something about the Draco library failing to load its WASM dependencies. :/