Chapter 20

src/particle_system.rs

@@ -7,7 +7,7 @@ pub fn cull_dead_particles(ecs: &mut World, ctx: &Rltk) {
     let mut dead_particles: Vec<Entity> = Vec::new();
     {
         let mut particles = ecs.write_storage::<ParticleLifetime>();
-        let mut entities = ecs.entities();
+        let entities = ecs.entities();
         for (entity, mut particle) in (&entities, &mut particles).join() {
             particle.lifetime_ms -= ctx.frame_time_ms;
             if particle.lifetime_ms < 0. {