code: function clamp(low, high) {
           return new me.ObservableVector3d(me.Math.clamp(this._x, low, high), me.Math.clamp(this._y, low, high), me.Math.clamp(this._z, low, high), {
             onUpdate: this.onUpdate
           });
         }
docs: Clamp the vector value within the specified value range
  @name clamp
  @memberOf me.ObservableVector3d
  @function
  @param {Number} low
  @param {Number} high
  @return {me.ObservableVector3d} new me.ObservableVector3d