private void handleDamage(DamageEvent evt)
        {
            if (entity.IsDead || entity[Key_IsInvulnerable])
            {
                return;
            }

            int health = entity[Key_Health];

            health            -= evt.Damage;
            entity[Key_Health] = health;

            if (health <= 0)
            {
                int lifes = entity[Key_Lifes];
                lifes            -= 1;
                entity[Key_Lifes] = lifes;
                entity.State      = EntityState.Dying;

                if (entity.Type == "player")
                {
                    HudEvent hudEvent = HudEvent.UpdateLifes(lifes);
                    eventManager.Queue(hudEvent);

                    CreateEntityEvent createEvt = CreateEntityEvent.New("player_death");
                    Vector2D          position  = entity[SpatialBehavior.Key_Position];
                    position.X -= 90;
                    position.Y -= 90;
                    createEvt.AddAttribute(SpatialBehavior.Key_Position, position);
                    eventManager.Queue(createEvt);

                    entity[RenderBehavior.Key_IsRenderable] = false;
                }

                if (lifes <= 0)
                {
                    Entity projectile      = entity.Game.World.Entities[evt.SourceEntityID];
                    Entity projectileOwner = projectile[ProjectileBehavior.Key_ProjectileOwner];

                    int destroyedByEntityID = projectile.ID;
                    if (projectileOwner != null)
                    {
                        destroyedByEntityID = projectileOwner.ID;
                    }

                    eventManager.Queue(DestroyEntityEvent.Destroy(entity.ID, destroyedByEntityID));

                    Console.WriteLine("[" + this.GetType().Name + "] Entity " + entity + " died a horrible death!");
                }
                else
                {
                    RespawnEntityEvent respawnEvent = RespawnEntityEvent.Respawn(entity.ID);
                    eventManager.Queue(respawnEvent);

                    Console.WriteLine("[" + this.GetType().Name + "] Entity " + entity + " lost a life. " + lifes
                                      + " lifes remaining. Respawning...");
                }
            }
        }
        private void createAndInitializeAlien(string type, float x, float y)
        {
            CreateEntityEvent evt = CreateEntityEvent.New(type);

            Vector2D position = new Vector2D(x, y);

            evt.AddAttribute(SpatialBehavior.Key_Position, position);

            EventManager.Queue(evt);
        }
        private void createAndInitializePlayer()
        {
            CreateEntityEvent evt = CreateEntityEvent.New("player");

            float    startX   = Width / 2f - (75f / 2f);
            float    startY   = 75 - (75f / 2f);
            Vector2D position = new Vector2D(startX, startY);

            evt.AddAttribute(SpatialBehavior.Key_Position, position);

            EventManager.Queue(evt);
        }