# Objective - Followup to #13548 - It added a list of all possible labels to documentation. This seems hard to keep up and doesn't stop people from making spelling mistake ## Solution - Add an enum that can create all the labels possible, and encourage its use rather than manually typed labels --------- Co-authored-by: Alice Cecile <alice.i.cecile@gmail.com> Co-authored-by: Rob Parrett <robparrett@gmail.com>
		
			
				
	
	
		
			67 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			Rust
		
	
	
	
	
	
			
		
		
	
	
			67 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			Rust
		
	
	
	
	
	
//! Rendering a scene with baked lightmaps.
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use bevy::pbr::Lightmap;
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use bevy::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(SceneBundle {
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        scene: asset_server
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            .load(GltfAssetLabel::Scene(0).from_asset("models/CornellBox/CornellBox.glb")),
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        ..default()
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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, &Handle<StandardMaterial>),
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        (With<Handle<Mesh>>, 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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