code: function scale(x, y) {
           y = typeof y !== "undefined" ? y : x;
           return this.setShape(this.pos.x, this.pos.y, this.radiusV.x * 2 * x, this.radiusV.y * 2 * y);
         }
docs: Scale this Ellipse by the specified scalar.
  @name scale
  @memberOf me.Ellipse.prototype
  @function
  @param {Number} x
  @param {Number} [y=x]
  @return {me.Ellipse} Reference to this object for method chaining