opti(particles): fetch ThreadRng only once in a system

README.md

@@ -17,7 +17,9 @@
 * (?) multiplayer
 * more audio
 * "jumpable" component to avoid jumping on sensors
-* bug: in level2, move the blue character to win, then reset. The characters are lighter than expected.
+* bug: in level2, move the blue character to win, then reset. The characters are lighter than expected. (also level 4)
+* redshift warning
+* itchio test
 
 ## Build
 

src/game.rs

@@ -52,7 +52,8 @@ impl Plugin for GamePlugin {
 					.with_system(player_movement_system)
 					.with_system(level_keyboard_system)
 					.with_system(move_camera)
-					.with_system(character_particle_effect_system),
+					.with_system(character_particle_effect_system)
+					.with_system(move_win_text_system),
 			)
 			.add_system_to_stage(CoreStage::PostUpdate, collision_event_system);
 	}
@@ -101,6 +102,9 @@ pub struct CollisionCount(usize);
 #[derive(Component)]
 pub struct Melty(pub Color);
 
+#[derive(Component)]
+pub struct WinText;
+
 // Systems
 
 fn setup(
@@ -286,8 +290,7 @@ fn collision_event_system(
 							.clamp(Vec4::ZERO, Vec4::ONE);
 
 						// If color approximately white
-						if app_state.current() == &AppState::Game
-							&& Vec4::from(new_color).min_element() >= 0.9
+						if app_state.current() == &AppState::Game && new_color.min_element() >= 0.9
 						{
 							app_state.replace(AppState::Win).ok();
 						}
@@ -491,7 +494,8 @@ fn win_setup(
 			transform: Transform::from_xyz(0., 0., 3.),
 			..default()
 		})
-		.insert(Level);
+		.insert(Level)
+		.insert(WinText);
 	commands
 		.spawn_bundle(Text2dBundle {
 			text: Text::from_section(
@@ -506,7 +510,8 @@ fn win_setup(
 			transform: Transform::from_xyz(0., 0., 4.),
 			..Default::default()
 		})
-		.insert(Level);
+		.insert(Level)
+		.insert(WinText);
 }
 
 fn move_camera(
@@ -535,6 +540,17 @@ fn move_camera(
 	}
 }
 
+fn move_win_text_system(
+	camera_query: Query<&Transform, With<Camera>>,
+	mut win_text_query: Query<&mut Transform, (With<WinText>, Without<Camera>)>,
+) {
+	let camera_pos = camera_query.single();
+	for mut pos in win_text_query.iter_mut() {
+		pos.translation.x = camera_pos.translation.x;
+		pos.translation.y = camera_pos.translation.y;
+	}
+}
+
 fn level_keyboard_system(
 	mut commands: Commands,
 	mut current_level: ResMut<CurrentLevel>,

src/menu.rs

@@ -20,6 +20,22 @@ impl Plugin for MenuPlugin {
 
 fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
 	let font = asset_server.get_handle("UacariLegacy-Thin.ttf");
+	#[cfg(target_arch = "wasm32")]
+	commands
+		.spawn_bundle(Text2dBundle {
+			text: Text::from_section(
+				"Note:\nAudio is NOT available in the WASM build.",
+				TextStyle {
+					font: font.clone(),
+					font_size: 24.0,
+					color: Color::rgba(1., 0.4, 0.4, 1.),
+				},
+			)
+			.with_alignment(TextAlignment::CENTER),
+			transform: Transform::from_xyz(0., -128.0, 0.),
+			..Default::default()
+		})
+		.insert(Menu);
 	commands
 		.spawn_bundle(Text2dBundle {
 			text: Text::from_section(

src/particle_effect.rs

@@ -1,5 +1,5 @@
 use bevy::{prelude::*, sprite::Mesh2dHandle};
-use rand::Rng;
+use rand::{rngs::ThreadRng, Rng};
 use rand_distr::{Distribution, UnitCircle};
 
 #[cfg(not(target_arch = "wasm32"))]
@@ -68,15 +68,20 @@ pub struct ParticleComponent {
 }
 
 impl ParticleComponent {
-	pub fn new() -> Self {
+	pub fn new(rng: &mut ThreadRng) -> Self {
 		let mut particle_component: Self = Self::default();
-		particle_component.randomize_velocity(MIN_VELOCITY, MAX_VELOCITY);
+		particle_component.randomize_velocity(rng, MIN_VELOCITY, MAX_VELOCITY);
 		particle_component
 	}
 
-	pub fn randomize_velocity(&mut self, min_velocity: f32, max_velocity: f32) {
-		let random_direction: [f32; 2] = UnitCircle.sample(&mut rand::thread_rng());
-		let random_magnitude: f32 = rand::thread_rng().gen_range(min_velocity..max_velocity);
+	pub fn randomize_velocity(
+		&mut self,
+		rng: &mut ThreadRng,
+		min_velocity: f32,
+		max_velocity: f32,
+	) {
+		let random_direction: [f32; 2] = UnitCircle.sample(rng);
+		let random_magnitude: f32 = rng.gen_range(min_velocity..max_velocity);
 		self.velocity = Vec3::new(random_direction[0], random_direction[1], 0.0) * random_magnitude;
 	}
 }
@@ -87,6 +92,8 @@ fn particle_effect_startup(
 	particle_mesh: Res<ParticleMesh>,
 	mut materials: ResMut<Assets<ColorMaterial>>,
 ) {
+	let mut rng = rand::thread_rng();
+
 	for _p in 0..POOL_COUNT {
 		let color_mesh = ColorMesh2dBundle {
 			mesh: particle_mesh.square.clone(),
@@ -96,7 +103,7 @@ fn particle_effect_startup(
 
 		commands
 			.spawn_bundle(color_mesh)
-			.insert(ParticleComponent::new());
+			.insert(ParticleComponent::new(&mut rng));
 	}
 }
 
@@ -110,6 +117,8 @@ fn particle_effect_system(
 	mut particle_effect: ResMut<ParticleEffectResource>,
 	time: Res<Time>,
 ) {
+	let mut rng = rand::thread_rng();
+
 	let delta_seconds: f32 = f32::max(0.001, time.delta_seconds());
 	let delta_position: Vec3 = particle_effect.translation - particle_effect.prev_translation;
 	// let overall_velocity: Vec3 = delta_position / delta_seconds;
@@ -124,7 +133,7 @@ fn particle_effect_system(
 			.distance_squared(particle_effect.translation);
 		if squared_distance > particle_effect.radius_squared {
 			transform.translation = particle_effect.translation;
-			particle_component.randomize_velocity(MIN_VELOCITY, MAX_VELOCITY);
+			particle_component.randomize_velocity(&mut rng, MIN_VELOCITY, MAX_VELOCITY);
 		}
 
 		if let Some(material) = materials.get_mut(color_material) {