Add system labels

src/components.rs

@@ -288,7 +288,7 @@ pub struct Playing;
 pub struct RunningState {
     /// Tracks the current amount of time since the start of the system.
     ///
-    /// This is reset when the running time surpases the ``system_duration_seconds``.
+    /// This is reset when the running time surpasses the ``system_duration_seconds``.
     pub running_time: f32,
 
     /// The truncated current second.

src/lib.rs

@@ -63,7 +63,9 @@ mod systems;
 pub mod values;
 
 use bevy_app::prelude::{App, Plugin};
+use bevy_ecs::prelude::{IntoSystemDescriptor, SystemSet};
 pub use components::*;
+pub use systems::ParticleSystemLabel;
 use systems::{
     particle_cleanup, particle_color, particle_lifetime, particle_spawner, particle_transform,
 };
@@ -91,12 +93,17 @@ pub struct ParticleSystemPlugin;
 
 impl Plugin for ParticleSystemPlugin {
     fn build(&self, app: &mut App) {
-        app.add_system(particle_spawner)
-            .add_system(particle_lifetime)
-            .add_system(particle_color)
-            .add_system(particle_transform)
-            .add_system(particle_cleanup)
-            .register_type::<ParticleSystem>()
+        app.add_system(particle_spawner.label(ParticleSystemLabel::ParticleSpawn));
+        app.add_system_set(
+            SystemSet::new()
+                .label(ParticleSystemLabel::ParticleUpdate)
+                .after(ParticleSystemLabel::ParticleSpawn)
+                .with_system(particle_lifetime)
+                .with_system(particle_color)
+                .with_system(particle_transform),
+        );
+        app.add_system(particle_cleanup.label(ParticleSystemLabel::ParticleCleanup));
+        app.register_type::<ParticleSystem>()
             .register_type::<ParticleCount>()
             .register_type::<RunningState>()
             .register_type::<BurstIndex>();

src/systems.rs

@@ -1,4 +1,5 @@
 use bevy_ecs::prelude::{Commands, Entity, Query, Res, With};
+use bevy_ecs::schedule::SystemLabel;
 use bevy_hierarchy::BuildChildren;
 use bevy_math::Vec3;
 use bevy_sprite::prelude::{Sprite, SpriteBundle};
@@ -16,6 +17,17 @@ use crate::{
     DistanceTraveled, ParticleTexture,
 };
 
+/// Label enum for the systems relating to transform propagation
+#[derive(Debug, Hash, PartialEq, Eq, Clone, SystemLabel)]
+pub enum ParticleSystemLabel {
+    /// Spawn particles
+    ParticleSpawn,
+    /// Update particles
+    ParticleUpdate,
+    /// Cleanup particles
+    ParticleCleanup,
+}
+
 #[allow(
     clippy::cast_sign_loss,
     clippy::cast_precision_loss,