GLB export doesn't include mesh names

[aussar]

The GLTF exporter does not include the names of the meshes when a scene or a 3D object is exported as GLB.

I recreated this by exporting a simple cube from Blender in GLTF format and exported it to GLB using the gltf-exporter (see attached files)

You can see the meshes in the GLB file do not contain the names. Any help to sort out this?

cube.gltf (4.4 KB)
cube.glb (2.7 KB)

[donmccurdy]

In three.js, a THREE.Mesh is a subclass of THREE.Object3D, and so meshes appear directly in the scene graph. In glTF, meshes are resources that can be attached to any ‘node’, more like a BufferGeometry in three.js. So I think the name of your mesh has been attached to the glTF “node” and not the glTF “mesh” here — if you open the file you’ll see three named nodes: “Cube”, “Camera”, and “Light”.

[aussar]

Thank @donmccurdy

I will provide some background info. I tried to use GitHub - facebookincubator/glTFVariantMeld: An application that accepts files on the glTF format, interprets them as variants of an over-arching whole, and melds them together. with the Three JS exported GLB models. But it returned an error as meshes do not have names.

I assume my best approach is to add mesh names to the GLTF JSON object and convert it to GLB. I know glTFVariantMeld is out of the ThreeJS, but appreciate it if you have any suggestions.

[donmccurdy]

Editing the JSON “meshes” entries should be fine. Another option would be to run a script like this in the https://gltf.report script editor, applying the node names to the meshes:

const scene = document.getRoot().listScenes()[0];

scene.traverse((node) => {
	const name = node.getName();
	const mesh = node.getMesh();
	if (mesh && name) {
		mesh.setName(name);
	}
});