Page about working with GLTF in Bevy #2
Comments
inodentry
added
S-cookbook
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Some of this information is mentioned on the new Assets page in the new 0.5 book. However, that is not enough. I am leaving this issue open, for a proper page about GLTF in Bevy. |
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I am working on this. I am trying to manually do what the |
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So I have some pretty ugly code/first draft that works, at least for the flight helmet GLTF, so let me know what you think, @jamadazi. fn main() {
App::build()
.insert_resource(AmbientLight {
color: Color::WHITE,
brightness: 1.0 / 5.0f32,
})
.insert_resource(Msaa { samples: 4 })
.add_plugins(DefaultPlugins)
.add_startup_system(setup.system())
.add_system(late_setup.system())
.run();
}
struct Model(Handle<Gltf>);
fn setup(mut commands: Commands,
asset_server: Res<AssetServer>) {
let handle : Handle<Gltf> = asset_server.load("models/FlightHelmet/FlightHelmet.gltf");
commands.insert_resource(Model(handle));
commands.spawn_bundle(PerspectiveCameraBundle {
transform: Transform::from_xyz(0.7, 0.7, 1.0).looking_at(Vec3::new(0.0, 0.3, 0.0), Vec3::Y),
..Default::default()
});
commands.spawn_bundle(LightBundle {
transform: Transform::from_xyz(3.0, 5.0, 3.0),
..Default::default()
});
}
fn late_setup(mut commands: Commands,
handle: Res<Model>,
mut done: Local<bool>,
gltfs: Res<Assets<Gltf>>,
gltf_nodes: Res<Assets<GltfNode>>,
gltf_meshes: Res<Assets<GltfMesh>>) {
if !*done {
if let Some(gltf) = gltfs.get(&handle.0) {
let nodes = gltf.nodes.iter().filter_map(|node| gltf_nodes.get(node));
commands.spawn()
.with_children(|parent| create_gltf_entities(parent, &gltf_meshes, nodes));
*done = true;
}
}
}
fn create_gltf_entities<'n>(builder: &mut ChildBuilder,
meshes: &Res<Assets<GltfMesh>>,
nodes: impl IntoIterator<Item = &'n GltfNode>) {
for node in nodes {
let mut entity = builder.spawn_bundle((node.transform.clone(),));
entity.with_children(|parent| create_gltf_entities(parent, meshes, &node.children));
/* grab the first primitve for this node */
let primitive = node.mesh.as_ref()
.and_then(|mesh| meshes.get(mesh))
.and_then(|mesh| mesh.primitives.first());
if let Some(primitive) = primitive {
if let Some(material) = primitive.material.as_ref() {
entity.insert_bundle(PbrBundle {
mesh: primitive.mesh.clone(),
material: material.clone(),
..Default::default()
});
}
}
}
}I need to test the |
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By the way, when I try to load the materials by what I am pretty sure are the exported names, I get an error and nothing shows up in the Bevy window. This works: commands.spawn().with_children(|parent| {
parent.spawn_bundle(PbrBundle {
mesh: asset_server.load("models/FlightHelmet/FlightHelmet.gltf#Mesh0/Primitive0"),
material: asset_server.load("models/FlightHelmet/FlightHelmet.gltf#Material0"),
..Default::default()
});
});This doesn't: commands.spawn().with_children(|parent| {
parent.spawn_bundle(PbrBundle {
mesh: asset_server.load("models/FlightHelmet/FlightHelmet.gltf#Mesh0/Primitive0"),
material: asset_server.load("models/FlightHelmet/FlightHelmet.gltf#HoseMat"),
..Default::default()
});
});The message from bevy_log is: Looking closer at bevy_gltf's loader.rs, I am not convinced that the loader is currently making these sub-assets available by their provided names. The names are exported to the Gltf object under named_nodes, named_meshes, named_materials etc, but I don't think these names can be currently used via an asset server. Checking all the calls to |
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Page on Bevy GLTF exists now and (I believe) covers all the common use cases pretty well. If there is more to be desired, comment or file issues! :) |
Add a section describing how to work with asset labels to address sub-assets in GLTF files.
It should cover how to get individual meshes, scenes, textures, etc. that were loaded from a GLTF file.
It should cover both bevy-generated labels (
Scene0,Primitive0, ...) and custom labels (when a GLTF file was exported with labels included in the file).The text was updated successfully, but these errors were encountered: