load_gltf_extras/
load_gltf_extras.rs

1//! Loads and renders a glTF file as a scene, and list all the different `gltf_extras`.
2
3use bevy::{
4    gltf::{GltfExtras, GltfMaterialExtras, GltfMeshExtras, GltfSceneExtras},
5    prelude::*,
6};
7
8fn main() {
9    App::new()
10        .add_plugins(DefaultPlugins)
11        .add_systems(Startup, setup)
12        .add_systems(Update, check_for_gltf_extras)
13        .run();
14}
15
16#[derive(Component)]
17struct ExampleDisplay;
18
19fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
20    commands.spawn((
21        Camera3d::default(),
22        Transform::from_xyz(2.0, 2.0, 2.0).looking_at(Vec3::ZERO, Vec3::Y),
23    ));
24
25    commands.spawn(DirectionalLight {
26        shadows_enabled: true,
27        ..default()
28    });
29
30    // a barebones scene containing one of each gltf_extra type
31    commands.spawn(SceneRoot(asset_server.load(
32        GltfAssetLabel::Scene(0).from_asset("models/extras/gltf_extras.glb"),
33    )));
34
35    // a place to display the extras on screen
36    commands.spawn((
37        Text::default(),
38        TextFont {
39            font_size: 15.,
40            ..default()
41        },
42        Node {
43            position_type: PositionType::Absolute,
44            top: px(12),
45            left: px(12),
46            ..default()
47        },
48        ExampleDisplay,
49    ));
50}
51
52fn check_for_gltf_extras(
53    gltf_extras_per_entity: Query<(
54        Entity,
55        Option<&Name>,
56        Option<&GltfSceneExtras>,
57        Option<&GltfExtras>,
58        Option<&GltfMeshExtras>,
59        Option<&GltfMaterialExtras>,
60    )>,
61    mut display: Single<&mut Text, With<ExampleDisplay>>,
62) {
63    let mut gltf_extra_infos_lines: Vec<String> = vec![];
64
65    for (id, name, scene_extras, extras, mesh_extras, material_extras) in
66        gltf_extras_per_entity.iter()
67    {
68        if scene_extras.is_some()
69            || extras.is_some()
70            || mesh_extras.is_some()
71            || material_extras.is_some()
72        {
73            let formatted_extras = format!(
74                "Extras per entity {} ('Name: {}'):
75    - scene extras:     {:?}
76    - primitive extras: {:?}
77    - mesh extras:      {:?}
78    - material extras:  {:?}
79                ",
80                id,
81                name.unwrap_or(&Name::default()),
82                scene_extras,
83                extras,
84                mesh_extras,
85                material_extras
86            );
87            gltf_extra_infos_lines.push(formatted_extras);
88        }
89        display.0 = gltf_extra_infos_lines.join("\n");
90    }
91}
load_gltf_extras/load_gltf_extras.rs

load_gltf_extras/
load_gltf_extras.rs
