Using setExtras() on gltf-transform CLI

[Utopiah]

Hi,

• can setExtras() from Property be used directly or
• should a custom configuration be written or
• should it be used by relying on gltf-transform/core

to set additional meta data?

[coderofsalvation]

I support this (would be very handy for https://xrfragment.org glTF's too).

[donmccurdy]

Hi @Utopiah and @coderofsalvation! The CLI doesn't provide any way to assign custom "extras" metadata today, unless you use a custom config.

Are you hoping to assign extras on the root of the glTF file, or to specific objects/meshes/materials/etc within the file? Different options might be easier depending on the purpose. Do you have a preference on how you'd want to do this?

It is definitely possible to use the scripting interface as well... would be something like:

import { NodeIO } from '@gltf-transform/core';
import { ALL_EXTENSIONS } from '@gltf-transform/extensions';

const io = new NodeIO().registerExtensions(ALL_EXTENSIONS);

const document = await io.read('path/to/model.glb');

const node = document.getRoot().listNodes()
  .find((node) => node.getName() === 'MyNode');

node.setExtras({test: true});

await io.write('path/to/output.glb', document);

You might need a bit more configuration in there if you're also using Draco or Meshopt compression, or non-standard extensions, but that's general idea.