6f7d0e5725
# Objective
Currently text is recomputed unnecessarily on any changes to its color,
which is extremely expensive.
## Solution
Split up `TextStyle` into two separate components `TextFont` and
`TextColor`.
## Testing
I added this system to `many_buttons`:
```rust
fn set_text_colors_changed(mut colors: Query<&mut TextColor>) {
for mut text_color in colors.iter_mut() {
text_color.set_changed();
}
}
```
reports ~4fps on main, ~50fps with this PR.
## Migration Guide
`TextStyle` has been renamed to `TextFont` and its `color` field has
been moved to a separate component named `TextColor` which newtypes
`Color`.
92 lines
2.4 KiB
Rust
92 lines
2.4 KiB
Rust
//! Loads and renders a glTF file as a scene, and list all the different `gltf_extras`.
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use bevy::{
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gltf::{GltfExtras, GltfMaterialExtras, GltfMeshExtras, GltfSceneExtras},
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prelude::*,
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};
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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.add_systems(Startup, setup)
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.add_systems(Update, check_for_gltf_extras)
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.run();
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}
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#[derive(Component)]
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struct ExampleDisplay;
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fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
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commands.spawn((
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Camera3d::default(),
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Transform::from_xyz(2.0, 2.0, 2.0).looking_at(Vec3::ZERO, Vec3::Y),
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));
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commands.spawn(DirectionalLight {
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shadows_enabled: true,
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..default()
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});
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// a barebones scene containing one of each gltf_extra type
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commands.spawn(SceneRoot(asset_server.load(
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GltfAssetLabel::Scene(0).from_asset("models/extras/gltf_extras.glb"),
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)));
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// a place to display the extras on screen
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commands.spawn((
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Text::default(),
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TextFont {
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font_size: 15.,
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..default()
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},
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Style {
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position_type: PositionType::Absolute,
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top: Val::Px(12.0),
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left: Val::Px(12.0),
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..default()
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},
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ExampleDisplay,
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));
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}
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fn check_for_gltf_extras(
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gltf_extras_per_entity: Query<(
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Entity,
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Option<&Name>,
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Option<&GltfSceneExtras>,
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Option<&GltfExtras>,
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Option<&GltfMeshExtras>,
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Option<&GltfMaterialExtras>,
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)>,
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mut display: Query<&mut Text, With<ExampleDisplay>>,
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) {
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let mut gltf_extra_infos_lines: Vec<String> = vec![];
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for (id, name, scene_extras, extras, mesh_extras, material_extras) in
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gltf_extras_per_entity.iter()
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{
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if scene_extras.is_some()
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|| extras.is_some()
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|| mesh_extras.is_some()
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|| material_extras.is_some()
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{
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let formatted_extras = format!(
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"Extras per entity {} ('Name: {}'):
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- scene extras: {:?}
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- primitive extras: {:?}
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- mesh extras: {:?}
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- material extras: {:?}
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",
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id,
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name.unwrap_or(&Name::default()),
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scene_extras,
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extras,
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mesh_extras,
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material_extras
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);
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gltf_extra_infos_lines.push(formatted_extras);
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}
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**display.single_mut() = gltf_extra_infos_lines.join("\n");
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}
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}
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