code: function (obj, floating) {
              if (floating === true || obj.floating === true) {
                  // check against screen coordinates
                  return me.video.renderer.overlaps(obj.getBounds());
              } else {
                  // check if within the current camera
                  return obj.getBounds().overlaps(this);
              }
          }
docs: check if the specified renderable is in the camera
  @name isVisible
  @memberOf me.Camera2d
  @function
  @param {me.Renderable} object
  @param {Boolean} [floating===object.floating] if visibility check should be done against screen coordinates
  @return {Boolean}