Documentation for loading glb primitives | Bevy | Page 1

woeful abyss Aug 4, 2023, 9:52 AM

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Is there any documentation around asset_server in particular loading glb files?
In particular I'm struggling with loading colliders for this house, there's a few different shapes in the blender scene - in particular the original cube I started with is not exported which I assume is why I get a panic on line 2.

For more specifics; attached is a screenshot, I want the boarding to be 'collidable', but I'm not sure without just trial and error what the mesh/primitive values should be.

let house_prim = asset_server.load("models/house.glb#Mesh0/Primitive0");
let house_mesh = meshes.get(&house_prim).unwrap();
let collider = Collider::from_bevy_mesh(house_mesh, &ComputedColliderShape::TriMesh)
        .unwrap_or(Collider::default());

fair fox Aug 4, 2023, 10:07 AM

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I discuss this briefly in https://devildahu.ch/devlog/making-of-klod-tech/#the-editor

devildahu.ch

Behind the Klod

The making of Klod, our 2nd bevy game jam entry

woeful abyss Aug 4, 2023, 10:20 AM

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It is possible to name object in glb scenes in blender using the Outliner dock (the tree view at the top right) and double-clicking object names.
This is interesting in the linked scene hook repo. I guess this is more of a blender question, but the concept of primitives seems a little different there. Is that quote suggesting I can change Cube.005 to awesomename and import it like asset_server.load("models/house.glb#boarding/awesomename")?

fair fox Aug 4, 2023, 10:21 AM

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I don't think so, have you tried? I think it might be possible (not sure) to do asset_server.load("models/house.glb#awesomename") though

woeful abyss Aug 4, 2023, 10:24 AM

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Just tried now, neither asset_server.load("models/house.glb#awesomename") nor asset_server.load("models/house.glb#Boarding/awesomename") worked 😦

fair fox Aug 4, 2023, 10:25 AM

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hmm it might be a different syntax

woeful abyss Aug 4, 2023, 10:36 AM

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What's interesting is scouring github I found this repo, with some more complex glb examples: https://github.com/eyzi/bevy-study/blob/b0fd817c98c48deb892cbdd21241a42045ccc020/examples/chess/game/pieces.rs#L9-L16
And their blender looks like this

fair fox Aug 4, 2023, 10:36 AM

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Seems like you can use the index of the mesh in the scene?

woeful abyss Aug 4, 2023, 10:58 AM

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Trouble is I don't remember which order I spawned them in in blender. Can't seem to find it either. See how their bishop is mesh6, but appears first in blender as it sorts alphabetically 🤔

livid shell Aug 4, 2023, 11:08 AM

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I've done it previously using this method, but it's not as easy as just putting a special name at the end of the import path. Hopefully working with gltf becomes easier in future versions of bevy. https://bevy-cheatbook.github.io/3d/gltf.html#using-gltf-sub-assets-in-bevy

3D Models and Scenes (GLTF) - Unofficial Bevy Cheat Book

woeful abyss Aug 4, 2023, 11:11 AM

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I was just rereading that page now. Going to go super slow and hopefully find my mistake

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I suspect some combination of what I tried would have worked, however the glb file just won't have loaded in time for the unwrap()

livid shell Aug 4, 2023, 11:14 AM

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yep it will prob need to be in another system that can check each frame to see if it's loaded

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I put a Vec in a resource and would keep the "loading" ones there so I knew what to check for, and remove them once they'd loaded

woeful abyss Aug 4, 2023, 11:14 AM

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Oooh, that's smart

stiff moss Aug 4, 2023, 6:45 PM

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.glb#Mesh0/Primitive0 works for me if I have a single object in my Blender scene. I'm making sure it's loaded with bevy_asset_loader

#Documentation for loading glb primitives