ticker awaits an empty particle queue

src/main.rs

@@ -269,7 +269,7 @@ impl GameState for State {
                 }
             }
             RunState::Ticking => {
-                while new_runstate == RunState::Ticking {
+                while new_runstate == RunState::Ticking && particle_system::check_queue(&self.ecs) {
                     self.run_systems();
                     self.ecs.maintain();
                     try_spawn_interval(&mut self.ecs);

src/particle_system.rs

@@ -31,6 +31,14 @@ fn cull_dead_particles(ecs: &mut World, ctx: &Rltk) {
     }
 }
 
+pub fn check_queue(ecs: &World) -> bool {
+    let particle_builder = ecs.read_resource::<ParticleBuilder>();
+    if particle_builder.delayed_requests.is_empty() && particle_builder.requests.is_empty() {
+        return true;
+    }
+    return false;
+}
+
 fn create_delayed_particles(ecs: &mut World, ctx: &Rltk) {
     let mut particle_builder = ecs.write_resource::<ParticleBuilder>();
     let mut handled_particles: Vec<ParticleRequest> = Vec::new();