i-mic-fps/lib/managers/entity_manager.rb

class IMICFPS
  TextureCoordinate = Struct.new(:u, :v, :weight)
  Point = Struct.new(:x, :y)
  Color = Struct.new(:red, :green, :blue, :alpha)
  Face  = Struct.new(:vertices, :uvs, :normals, :material, :smoothing)

  module EntityManager # Get included into GameState context
    def add_entity(entity)
      @collision_manager.add(entity)# Add every entity to collision manager
      @entities << entity
    end

    def find_entity(entity)
      @entities.detect {|entity| entity == entity}
    end

    def remove_entity(entity)
      ent = @entities.detect {|entity| entity == entity}
      if ent
        @collision_manager.remove(entity)
        @entities.delete(ent)
      end
    end

    def entities
      @entities
    end
  end
end