/**
                         * @description
                         *
                         * CG.Vector
                         *
                         * @class CG.Vector
                         * @extends CG.Point
                         */
                        CG.Point.extend('Vector', {
                            /**
                             * @constructor
                             * @method init
                             * @param x {Number} the x position
                             * @param y {Number} the y position
                             * @param z {Number} the z position
                             */
                            init:function (x, y, z) {
                                this._super(this, x, y)
                                /**
                                 @property z {Number}
                                 */
                                this.z = z || 0
                            }
                        })