function AABB(options){
    options = options || {};

    /**
     * The lower bound of the bounding box.
     * @property lowerBound
     * @type {Vec3}
     */
    this.lowerBound = new Vec3();
    if(options.lowerBound){
        this.lowerBound.copy(options.lowerBound);
    }

    /**
     * The upper bound of the bounding box.
     * @property upperBound
     * @type {Vec3}
     */
    this.upperBound = new Vec3();
    if(options.upperBound){
        this.upperBound.copy(options.upperBound);
    }
}
Axis aligned bounding box class.
@class AABB
@constructor
@param {Object} [options]
@param {Vec3}   [options.upperBound]
@param {Vec3}   [options.lowerBound]