mirror of
https://github.com/bevyengine/bevy
synced 2024-11-25 14:10:19 +00:00
eb51b4c28e
# Objective A step in the migration to required components: scenes! ## Solution As per the [selected proposal](https://hackmd.io/@bevy/required_components/%2FPJtNGVMMQhyM0zIvCJSkbA): - Deprecate `SceneBundle` and `DynamicSceneBundle`. - Add `SceneRoot` and `DynamicSceneRoot` components, which wrap a `Handle<Scene>` and `Handle<DynamicScene>` respectively. ## Migration Guide Asset handles for scenes and dynamic scenes must now be wrapped in the `SceneRoot` and `DynamicSceneRoot` components. Raw handles as components no longer spawn scenes. Additionally, `SceneBundle` and `DynamicSceneBundle` have been deprecated. Instead, use the scene components directly. Previously: ```rust let model_scene = asset_server.load(GltfAssetLabel::Scene(0).from_asset("model.gltf")); commands.spawn(SceneBundle { scene: model_scene, transform: Transform::from_xyz(-4.0, 0.0, -3.0), ..default() }); ``` Now: ```rust let model_scene = asset_server.load(GltfAssetLabel::Scene(0).from_asset("model.gltf")); commands.spawn(( SceneRoot(model_scene), Transform::from_xyz(-4.0, 0.0, -3.0), )); ```
63 lines
1.9 KiB
Rust
63 lines
1.9 KiB
Rust
//! Rendering a scene with baked lightmaps.
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use bevy::{pbr::Lightmap, prelude::*};
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.insert_resource(AmbientLight::NONE)
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.add_systems(Startup, setup)
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.add_systems(Update, add_lightmaps_to_meshes)
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.run();
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}
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fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
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commands.spawn(SceneRoot(asset_server.load(
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GltfAssetLabel::Scene(0).from_asset("models/CornellBox/CornellBox.glb"),
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)));
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commands.spawn(Camera3dBundle {
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transform: Transform::from_xyz(-278.0, 273.0, 800.0),
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..default()
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});
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}
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fn add_lightmaps_to_meshes(
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mut commands: Commands,
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asset_server: Res<AssetServer>,
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mut materials: ResMut<Assets<StandardMaterial>>,
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meshes: Query<
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(Entity, &Name, &MeshMaterial3d<StandardMaterial>),
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(With<Mesh3d>, Without<Lightmap>),
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>,
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) {
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let exposure = 250.0;
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for (entity, name, material) in meshes.iter() {
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if &**name == "large_box" {
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materials.get_mut(material).unwrap().lightmap_exposure = exposure;
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commands.entity(entity).insert(Lightmap {
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image: asset_server.load("lightmaps/CornellBox-Large.zstd.ktx2"),
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..default()
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});
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continue;
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}
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if &**name == "small_box" {
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materials.get_mut(material).unwrap().lightmap_exposure = exposure;
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commands.entity(entity).insert(Lightmap {
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image: asset_server.load("lightmaps/CornellBox-Small.zstd.ktx2"),
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..default()
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});
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continue;
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}
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if name.starts_with("cornell_box") {
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materials.get_mut(material).unwrap().lightmap_exposure = exposure;
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commands.entity(entity).insert(Lightmap {
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image: asset_server.load("lightmaps/CornellBox-Box.zstd.ktx2"),
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..default()
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});
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continue;
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}
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}
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}
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