code: function overlaps(rect) {
           return rect.left < this.getWidth() && rect.right > 0 && rect.top < this.getHeight() && rect.bottom > 0;
         }
docs: check if the given rectangle overlaps with the renderer screen coordinates
  @name overlaps
  @memberOf me.Renderer.prototype
  @function
  @param  {me.Rect} rect
  @return {boolean} true if overlaps