73605f43b6
As mentioned in #2926, it's better to have an explicit type that clearly communicates the intent of the timer mode rather than an opaque boolean, which can be only understood when knowing the signature or having to look up the documentation. This also opens up a way to merge different timers, such as `Stopwatch`, and possibly future ones, such as `DiscreteStopwatch` and `DiscreteTimer` from #2683, into one struct. Signed-off-by: Lena Milizé <me@lvmn.org> # Objective Fixes #2926. ## Solution Introduce `TimerMode` which replaces the `bool` argument of `Timer` constructors. A `Default` value for `TimerMode` is `Once`. --- ## Changelog ### Added - `TimerMode` enum, along with variants `TimerMode::Once` and `TimerMode::Repeating` ### Changed - Replace `bool` argument of `Timer::new` and `Timer::from_seconds` with `TimerMode` - Change `repeating: bool` field of `Timer` with `mode: TimerMode` ## Migration Guide - Replace `Timer::new(duration, false)` with `Timer::new(duration, TimerMode::Once)`. - Replace `Timer::new(duration, true)` with `Timer::new(duration, TimerMode::Repeating)`. - Replace `Timer::from_seconds(seconds, false)` with `Timer::from_seconds(seconds, TimerMode::Once)`. - Replace `Timer::from_seconds(seconds, true)` with `Timer::from_seconds(seconds, TimerMode::Repeating)`. - Change `timer.repeating()` to `timer.mode() == TimerMode::Repeating`.
118 lines
3.7 KiB
Rust
118 lines
3.7 KiB
Rust
//! Renders a lot of sprites to allow performance testing.
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//! See <https://github.com/bevyengine/bevy/pull/1492>
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//!
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//! It sets up many sprites in different sizes and rotations, and at different scales in the world,
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//! and moves the camera over them to see how well frustum culling works.
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//!
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//! Add the `--colored` arg to run with color tinted sprites. This will cause the sprites to be rendered
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//! in multiple batches, reducing performance but useful for testing.
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use bevy::{
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diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
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prelude::*,
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window::PresentMode,
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};
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use rand::Rng;
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const CAMERA_SPEED: f32 = 1000.0;
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const COLORS: [Color; 3] = [Color::BLUE, Color::WHITE, Color::RED];
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#[derive(Resource)]
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struct ColorTint(bool);
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fn main() {
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App::new()
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.insert_resource(WindowDescriptor {
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present_mode: PresentMode::AutoNoVsync,
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..default()
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})
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.insert_resource(ColorTint(
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std::env::args().nth(1).unwrap_or_default() == "--colored",
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))
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// Since this is also used as a benchmark, we want it to display performance data.
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.add_plugin(LogDiagnosticsPlugin::default())
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.add_plugin(FrameTimeDiagnosticsPlugin::default())
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.add_plugins(DefaultPlugins)
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.add_startup_system(setup)
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.add_system(print_sprite_count)
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.add_system(move_camera.after(print_sprite_count))
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.run();
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}
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fn setup(mut commands: Commands, assets: Res<AssetServer>, color_tint: Res<ColorTint>) {
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warn!(include_str!("warning_string.txt"));
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let mut rng = rand::thread_rng();
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let tile_size = Vec2::splat(64.0);
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let map_size = Vec2::splat(320.0);
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let half_x = (map_size.x / 2.0) as i32;
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let half_y = (map_size.y / 2.0) as i32;
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let sprite_handle = assets.load("branding/icon.png");
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// Spawns the camera
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commands.spawn(Camera2dBundle::default());
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// Builds and spawns the sprites
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let mut sprites = vec![];
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for y in -half_y..half_y {
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for x in -half_x..half_x {
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let position = Vec2::new(x as f32, y as f32);
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let translation = (position * tile_size).extend(rng.gen::<f32>());
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let rotation = Quat::from_rotation_z(rng.gen::<f32>());
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let scale = Vec3::splat(rng.gen::<f32>() * 2.0);
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sprites.push(SpriteBundle {
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texture: sprite_handle.clone(),
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transform: Transform {
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translation,
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rotation,
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scale,
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},
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sprite: Sprite {
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custom_size: Some(tile_size),
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color: if color_tint.0 {
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COLORS[rng.gen_range(0..3)]
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} else {
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Color::WHITE
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},
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..default()
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},
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..default()
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});
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}
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}
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commands.spawn_batch(sprites);
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}
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// System for rotating and translating the camera
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fn move_camera(time: Res<Time>, mut camera_query: Query<&mut Transform, With<Camera>>) {
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let mut camera_transform = camera_query.single_mut();
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camera_transform.rotate_z(time.delta_seconds() * 0.5);
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*camera_transform = *camera_transform
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* Transform::from_translation(Vec3::X * CAMERA_SPEED * time.delta_seconds());
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}
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#[derive(Deref, DerefMut)]
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struct PrintingTimer(Timer);
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impl Default for PrintingTimer {
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fn default() -> Self {
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Self(Timer::from_seconds(1.0, TimerMode::Repeating))
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}
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}
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// System for printing the number of sprites on every tick of the timer
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fn print_sprite_count(time: Res<Time>, mut timer: Local<PrintingTimer>, sprites: Query<&Sprite>) {
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timer.tick(time.delta());
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if timer.just_finished() {
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info!("Sprites: {}", sprites.iter().count(),);
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}
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}
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