import { Point } from '.';
export declare class Vector extends Point {
    constructor(x: number, y: number);
    add(vector: Vector): Vector;
    subtract(vector: Vector): Vector;
    length(): number;
    multiply(multiplier: number): Vector;
    /**
     * Allows us to determine a vector coming 90º from any
     * vector.
     * @param  {Vector} vector [description]
     * @return {number}        [description]
     */
    cross(vector: Vector): number;
    /**
     * Allows us to determine whether two vectors are pointing
     * in the same direction.
     * @param  {Vector} vector [description]
     * @return {number}        [description]
     */
    dot(vector: Vector): number;
}