integrated particle system into player positions

Cargo.lock

@@ -469,23 +469,6 @@ dependencies = [
  "thiserror",
 ]
 
-[[package]]
-name = "bevy_hanabi"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "371c5bd9edcf42721cd4e769354c221f3c4090e7a1dba0eb0bd6ca29e7828142"
-dependencies = [
- "anyhow",
- "bevy",
- "bitflags",
- "bytemuck",
- "copyless",
- "rand",
- "rand_pcg",
- "ron",
- "serde",
-]
-
 [[package]]
 name = "bevy_hierarchy"
 version = "0.8.0"
@@ -915,11 +898,12 @@ version = "0.1.0"
 dependencies = [
  "bevy",
  "bevy-inspector-egui",
- "bevy_hanabi",
  "bevy_rapier2d",
  "cpal 0.14.0",
  "crossbeam-channel",
  "hexodsp",
+ "rand",
+ "rand_distr",
  "ticktock",
 ]
 
@@ -3131,12 +3115,13 @@ dependencies = [
 ]
 
 [[package]]
-name = "rand_pcg"
+name = "rand_distr"
-version = "0.3.1"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59cad018caf63deb318e5a4586d99a24424a364f40f1e5778c29aca23f4fc73e"
+checksum = "32cb0b9bc82b0a0876c2dd994a7e7a2683d3e7390ca40e6886785ef0c7e3ee31"
 dependencies = [
- "rand_core",
+ "num-traits",
+ "rand",
 ]
 
 [[package]]

Cargo.toml

@@ -7,13 +7,15 @@ edition = "2021"
 
 [dependencies]
 bevy = "0.8.0"
-bevy_hanabi = "0.3.1"
+# bevy_hanabi = "0.3.1"
 bevy-inspector-egui = "0.12.1"
 bevy_rapier2d = "0.16.2"
 cpal = "0.14.0"
 crossbeam-channel = "0.5.6"
 hexodsp = { git = "https://github.com/WeirdConstructor/HexoDSP" }
 ticktock = "0.8.0"
+rand = "0.8.5"
+rand_distr = "0.4.3"
 
 [profile.dev.package."*"]
 opt-level = 3

src/game.rs

@@ -10,7 +10,6 @@ use bevy::{
 	prelude::{shape::Quad, *},
 	sprite::Mesh2dHandle,
 };
-use bevy_hanabi::*;
 use bevy_rapier2d::prelude::*;
 use std::collections::BTreeSet;
 
@@ -32,7 +31,8 @@ impl Plugin for GamePlugin {
 			.add_system_set(
 				SystemSet::on_update(AppState::Game)
 					.with_system(crate::levels::post_setup_level)
-					.with_system(keyboard_input_system),
+					.with_system(keyboard_input_system)
+					.with_system(character_particle_effect_system),
 			)
 			.add_system_set(SystemSet::on_update(AppState::Win).with_system(keyboard_input_system))
 			.add_system_to_stage(CoreStage::PostUpdate, collision_event_system);
@@ -101,7 +101,6 @@ fn setup(
 pub fn spawn_character(
 	commands: &mut Commands,
 	character_meshes: &Res<CharacterMeshes>,
-	effects: &mut ResMut<Assets<EffectAsset>>,
 	materials: &mut ResMut<Assets<ColorMaterial>>,
 	selected_character_id: &mut Mut<SelectedCharacterId>,
 	character_id_list: &mut Mut<CharacterIdList>,
@@ -118,22 +117,6 @@ pub fn spawn_character(
 	);
 	character_id_list.0.insert(character_id);
 
-	let mut gradient = Gradient::new();
-	gradient.add_key(
-		0.0,
-		(Vec4::from(color) + Vec4::new(0.1, 0.1, 0.1, 0.0))
-			.clamp(Vec4::new(0., 0., 0., 0.), Vec4::new(1., 1., 1., 0.)),
-	);
-	gradient.add_key(
-		0.2,
-		(Vec4::from(color) + Vec4::new(0.1, 0.1, 0.1, 0.0))
-			.clamp(Vec4::new(0., 0., 0., 0.), Vec4::new(1., 1., 1., 1.)),
-	);
-	gradient.add_key(
-		1.0,
-		(Vec4::from(color) + Vec4::new(0.1, 0.1, 0.1, 0.0))
-			.clamp(Vec4::new(0., 0., 0., 0.), Vec4::new(1., 1., 1., 0.)),
-	);
 	commands
 		.spawn_bundle(ColorMesh2dBundle {
 			mesh: character_meshes.square.clone(),
@@ -156,35 +139,7 @@ pub fn spawn_character(
 			angular_damping: 0.5,
 		})
 		.insert(ExternalImpulse::default())
-		.insert(ActiveEvents::COLLISION_EVENTS)
+		.insert(ActiveEvents::COLLISION_EVENTS);
-		.with_children(|c| {
-			c.spawn_bundle(ParticleEffectBundle {
-				effect: ParticleEffect::new(
-					effects.add(
-						EffectAsset {
-							name: "Particles".into(),
-							capacity: 4096,
-							spawner: Spawner::rate(30.0.into())
-								.with_active(selected_character_id.0.is_none()),
-							..Default::default()
-						}
-						.init(PositionCircleModifier {
-							radius: 30.0,
-							speed: 20.0.into(),
-							dimension: ShapeDimension::Surface,
-							..Default::default()
-						})
-						.init(ParticleLifetimeModifier { lifetime: 0.8 })
-						.render(SizeOverLifetimeModifier {
-							gradient: Gradient::constant(Vec2::splat(4.0)),
-						})
-						.render(ColorOverLifetimeModifier { gradient }),
-					),
-				),
-				transform: Transform::from_xyz(0., 0., 0.1),
-				..Default::default()
-			});
-		});
 
 	// If no character is selected, then select this one
 	if selected_character_id.0.is_none() {
@@ -199,7 +154,6 @@ fn collision_event_system(
 	mut commands: Commands,
 	character_meshes: Res<CharacterMeshes>,
 	mut materials: ResMut<Assets<ColorMaterial>>,
-	mut effects: ResMut<Assets<EffectAsset>>,
 	mut collision_events: EventReader<CollisionEvent>,
 	character_query: Query<(&CharacterId, &CharacterColor, &Transform)>,
 	mut level_query: Query<(&mut SelectedCharacterId, &mut CharacterIdList)>,
@@ -235,7 +189,6 @@ fn collision_event_system(
 					spawn_character(
 						&mut commands,
 						&character_meshes,
-						&mut effects,
 						&mut materials,
 						&mut selected_character_id,
 						&mut character_id_list,
@@ -251,27 +204,14 @@ fn collision_event_system(
 
 fn keyboard_input_system(
 	keyboard_input: Res<Input<KeyCode>>,
-	mut characters: Query<(&CharacterId, &mut Velocity, &CharacterColor, &Children)>,
+	mut characters: Query<(&CharacterId, &mut Velocity, &CharacterColor)>,
 	mut level_query: Query<(&mut SelectedCharacterId, &CharacterIdList)>,
-	mut effect: Query<&mut ParticleEffect>,
 	mut app_state: ResMut<State<AppState>>,
 	audio: Res<crossbeam_channel::Sender<AudioMsg>>,
 ) {
 	if let Ok((mut selected_character_id, character_id_list)) = level_query.get_single_mut() {
 		if keyboard_input.just_pressed(KeyCode::Tab) {
 			let selected = if let Some(selected_character_id) = &mut selected_character_id.0 {
-				if let Some((_character_id, _velocity, _color, children)) = characters
-					.iter_mut()
-					.find(|(character_id, _velocity, _color, _children)| {
-						*character_id == selected_character_id
-					}) {
-					effect
-						.get_mut(children[0])
-						.unwrap()
-						.maybe_spawner()
-						.unwrap()
-						.set_active(false);
-				}
 
 				*selected_character_id = *character_id_list
 					.0
@@ -284,16 +224,10 @@ fn keyboard_input_system(
 				CharacterId(0)
 			};
 
-			if let Some((_character_id, _velocity, color, children)) = characters
+			if let Some((_character_id, _velocity, color)) = characters
 				.iter_mut()
-				.find(|(character_id, _velocity, _color, _children)| **character_id == selected)
+				.find(|(character_id, _velocity, _color)| **character_id == selected)
 			{
-				effect
-					.get_mut(children[0])
-					.unwrap()
-					.maybe_spawner()
-					.unwrap()
-					.set_active(true);
 				audio
 					.send(AudioMsg::Color([color.0.r(), color.0.g(), color.0.b()]))
 					.ok();
@@ -306,9 +240,9 @@ fn keyboard_input_system(
 			keyboard_input.pressed(KeyCode::Left) || keyboard_input.pressed(KeyCode::A);
 
 		if let Some(selected_character_id) = &selected_character_id.0 {
-			if let Some((_character_id, mut velocity, _color, _children)) = characters
+			if let Some((_character_id, mut velocity, _color)) = characters
 				.iter_mut()
-				.find(|(character_id, _velocity, _color, _children)| {
+				.find(|(character_id, _velocity, _color)| {
 					*character_id == selected_character_id
 				}) {
 				velocity.linvel.x = 200. * (right_pressed as i8 - left_pressed as i8) as f32;
@@ -326,6 +260,25 @@ fn keyboard_input_system(
 	}
 }
 
+fn character_particle_effect_system(
+	mut characters: Query<(&CharacterId, &Transform, &CharacterColor)>,
+    mut particle_effect: ResMut<crate::particle_effect::ParticleEffectResource>,
+	mut level_query: Query<(&SelectedCharacterId)>,
+) {
+	if let Ok(selected_character_id) = level_query.get_single_mut() {
+		if let Some(selected_character_id) = &selected_character_id.0 {
+			if let Some((_character_id, transform, color)) = characters
+				.iter_mut()
+				.find(|(character_id, _transform, _color)| {
+					*character_id == selected_character_id
+				}) {
+				particle_effect.translation = transform.translation;
+				particle_effect.color = color.0;
+			}
+		}
+	}
+}
+
 fn win_setup(mut commands: Commands, asset_server: Res<AssetServer>) {
 	let font = asset_server.get_handle("UacariLegacy-Thin.ttf");
 	commands

src/levels.rs

@@ -7,7 +7,6 @@ mod level1;
 use crate::game::*;
 
 use bevy::prelude::*;
-use bevy_hanabi::*;
 use std::collections::BTreeSet;
 
 pub fn setup_level(
@@ -37,7 +36,6 @@ pub fn despawn_level(mut commands: Commands, level_query: Query<Entity, With<Lev
 pub fn post_setup_level(
 	mut commands: Commands,
 	character_meshes: Res<CharacterMeshes>,
-	mut effects: ResMut<Assets<EffectAsset>>,
 	mut materials: ResMut<Assets<ColorMaterial>>,
 	current_level: Res<CurrentLevel>,
 	mut level_query: Query<(&mut SelectedCharacterId, &mut CharacterIdList)>,
@@ -54,7 +52,6 @@ pub fn post_setup_level(
 					0 => level0::setup(
 						&mut commands,
 						&character_meshes,
-						&mut effects,
 						&mut materials,
 						&mut selected_character_id,
 						&mut character_id_list,
@@ -63,7 +60,6 @@ pub fn post_setup_level(
 					1 => level1::setup(
 						&mut commands,
 						&character_meshes,
-						&mut effects,
 						&mut materials,
 						&mut selected_character_id,
 						&mut character_id_list,

src/levels/level0.rs

@@ -1,13 +1,11 @@
 use crate::game::*;
 
 use bevy::prelude::*;
-use bevy_hanabi::*;
 use bevy_rapier2d::prelude::*;
 
 pub fn setup(
 	commands: &mut Commands,
 	character_meshes: &Res<CharacterMeshes>,
-	effects: &mut ResMut<Assets<EffectAsset>>,
 	materials: &mut ResMut<Assets<ColorMaterial>>,
 	selected_character_id: &mut Mut<SelectedCharacterId>,
 	character_id_list: &mut Mut<CharacterIdList>,
@@ -21,7 +19,6 @@ pub fn setup(
 	spawn_character(
 		commands,
 		character_meshes,
-		effects,
 		materials,
 		selected_character_id,
 		character_id_list,
@@ -32,7 +29,6 @@ pub fn setup(
 	spawn_character(
 		commands,
 		character_meshes,
-		effects,
 		materials,
 		selected_character_id,
 		character_id_list,
@@ -43,7 +39,6 @@ pub fn setup(
 	spawn_character(
 		commands,
 		character_meshes,
-		effects,
 		materials,
 		selected_character_id,
 		character_id_list,

src/levels/level1.rs

@@ -1,13 +1,11 @@
 use crate::game::*;
 
 use bevy::prelude::*;
-use bevy_hanabi::*;
 use bevy_rapier2d::prelude::*;
 
 pub fn setup(
 	commands: &mut Commands,
 	character_meshes: &Res<CharacterMeshes>,
-	effects: &mut ResMut<Assets<EffectAsset>>,
 	materials: &mut ResMut<Assets<ColorMaterial>>,
 	selected_character_id: &mut Mut<SelectedCharacterId>,
 	character_id_list: &mut Mut<CharacterIdList>,
@@ -27,7 +25,6 @@ pub fn setup(
 	spawn_character(
 		commands,
 		character_meshes,
-		effects,
 		materials,
 		selected_character_id,
 		character_id_list,
@@ -38,7 +35,6 @@ pub fn setup(
 	spawn_character(
 		commands,
 		character_meshes,
-		effects,
 		materials,
 		selected_character_id,
 		character_id_list,
@@ -49,7 +45,6 @@ pub fn setup(
 	spawn_character(
 		commands,
 		character_meshes,
-		effects,
 		materials,
 		selected_character_id,
 		character_id_list,

src/main.rs

@@ -9,7 +9,6 @@ use bevy::{
 	prelude::*,
 	render::settings::{WgpuFeatures, WgpuSettings},
 };
-use bevy_hanabi::*;
 use bevy_rapier2d::prelude::*;
 
 #[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
@@ -33,11 +32,11 @@ fn main() {
 		.insert_resource(audio_event_sender)
 		.add_state(AppState::Menu)
 		.add_plugins(DefaultPlugins)
-		.add_plugin(HanabiPlugin)
 		.add_plugin(RapierPhysicsPlugin::<NoUserData>::pixels_per_meter(64.0))
 		.add_plugin(RapierDebugRenderPlugin::default())
 		.add_plugin(menu::MenuPlugin)
 		.add_plugin(game::GamePlugin)
+		.add_plugin(particle_effect::ParticleEffectPlugin)
 		.add_plugin(bevy_inspector_egui::WorldInspectorPlugin::new())
 		.add_startup_system(setup)
 		.run();

src/particle_effect.rs

@@ -1,4 +1,13 @@
 use bevy::{prelude::*, sprite::Mesh2dHandle};
+use rand::Rng;
+use rand_distr::{UnitCircle, Distribution};
+
+pub const POOL_COUNT: usize = 100;
+
+pub const MIN_VELOCITY: f32 = 10.0;
+pub const MAX_VELOCITY: f32 = 100.0;
+pub const VELOCITY_SCALE: f32 = 0.1;
+pub const PARTICLE_EFFECT_RADIUS: f32 = 70.0;
 
 pub struct ParticleEffectPlugin;
 
@@ -6,8 +15,9 @@ impl Plugin for ParticleEffectPlugin {
     fn build(&self, app: &mut App) {
         app
 			.init_resource::<ParticleMesh>()
-            .insert_resource(PoolCount(1000))
+            .insert_resource(ParticleEffectResource::new(Vec3::new(10000.0, 10000.0, 0.0)))
-            .add_startup_system(particle_effect_startup);
+            .add_startup_system(particle_effect_startup)
+			.add_system(particle_effect_system);
     }
 }
 
@@ -18,6 +28,7 @@ pub struct ParticleMesh {
 impl FromWorld for ParticleMesh {
 	fn from_world(world: &mut World) -> Self {
 		let mut meshes = world.get_resource_mut::<Assets<Mesh>>().unwrap();
+
 		Self {
 			square: meshes
 				.add(Mesh::from(shape::Quad {
@@ -29,29 +40,87 @@ impl FromWorld for ParticleMesh {
 	}
 }
 
-pub struct PoolCount(usize);
+#[derive(bevy_inspector_egui::Inspectable)]
+pub struct ParticleEffectResource {
+    pub translation: Vec3,
+	pub prev_translation: Vec3,
+    pub radius_squared: f32,
+	pub color: Color,
+}
 
-#[derive(Component)]
+impl ParticleEffectResource {
-pub struct ParticleComponent;
+	fn new(init_translation: Vec3) -> Self {
+		Self {
+			translation: init_translation,
+			prev_translation: init_translation,
+			radius_squared: PARTICLE_EFFECT_RADIUS * PARTICLE_EFFECT_RADIUS,
+			color: Color::WHITE,
+		}
+	}
+}
+
+#[derive(Default, Component)]
+pub struct ParticleComponent {
+	pub velocity: Vec3,
+}
+
+impl ParticleComponent {
+	pub fn new() -> Self {
+		let mut particle_component: Self = Self::default();
+        particle_component.randomize_velocity(MIN_VELOCITY, MAX_VELOCITY);
+        return 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);
+        self.velocity = Vec3::new(random_direction[0], random_direction[1], 0.0) * random_magnitude;
+	}
+}
 
 fn particle_effect_startup(
     mut commands: Commands,
 
 	particle_mesh: Res<ParticleMesh>,
-    pool_count: ResMut<PoolCount>,
 	mut materials: ResMut<Assets<ColorMaterial>>,
 ) {
-    for _p in 0 .. pool_count.0 {
+    for _p in 0 .. POOL_COUNT {
         let color_mesh = ColorMesh2dBundle {
 			mesh: particle_mesh.square.clone(),
 			material: materials.add(ColorMaterial::from(Color::WHITE)),
-            // default to invisible
-            visibility: Visibility {is_visible: false},
 			..default()
 		};
 
         commands
             .spawn_bundle(color_mesh)
-            .insert(ParticleComponent);
+            .insert(ParticleComponent::new());
+    }
+}
+
+fn particle_effect_system(
+	mut materials: ResMut<Assets<ColorMaterial>>,
+    mut query: Query<(&mut Transform, &mut ParticleComponent, &Handle<ColorMaterial>)>,
+    mut particle_effect: ResMut<ParticleEffectResource>,
+    time: Res<Time>,
+) {
+    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;
+	particle_effect.prev_translation = particle_effect.translation;
+
+	for (mut transform, mut particle_component, color_material) in query.iter_mut() {
+        // particle_component.velocity -= overall_velocity * VELOCITY_SCALE;
+        transform.translation += particle_component.velocity * delta_seconds + delta_position;
+
+		let squared_distance: f32 = transform.translation.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);
+		}
+
+		if let Some(material) = materials.get_mut(color_material) {
+			material.color = particle_effect.color;
+			material.color.set_a((particle_effect.radius_squared - squared_distance) / particle_effect.radius_squared);
+		}
 	}
 }