added on_order handler to entities and components, added visibility map

lib/components/spawner.rb

@@ -1,5 +1,12 @@
 class IMICRTS
   class Spawner < Component
+    attr_accessor :spawnpoint
+
+    def setup
+      @spawnpoint = @parent.position.clone
+      @spawnpoint.y += 64
+    end
+
     def tick(tick_id)
       item = @parent.component(:build_queue).queue.first
 
@@ -12,5 +19,15 @@ class IMICRTS
       item.completed = true
       @parent.director.schedule_order(IMICRTS::Order::BUILD_UNIT_COMPLETE, @parent.player.id, @parent.id)
     end
+
+    def on_order(type, order)
+      case type
+      when IMICRTS::Order::BUILD_UNIT_COMPLETE
+        item = @parent.component(:build_queue).queue.shift
+
+        ent = @parent.director.spawn_entity(player_id: @parent.player.id, name: item.entity.name, position: @spawnpoint)
+        ent.target = @parent.component(:waypoint).waypoint if @parent.component(:waypoint)
+      end
+    end
   end
 end