Added spawner and waypoint components, added building_set_waypoint order, particle emitters can now toggle their emission, buildings can now build and spawn units, buildings now dynamically emit smoke when working and no longer when building, added player2 to default game for testing.

lib/map.rb

@@ -95,6 +95,10 @@ class IMICRTS
       return _tiles
     end
 
+    def world_to_grid(vector)
+      vector / @tile_size
+    end
+
     def tile_at(x, y)
       @tiles.dig(x, y)
     end