declare class Vec2D {
    x: number;
    y: number;
    /**
     * A 2D vector.
     *
     * @param x X-coordinate
     * @param y Y-coordinate
     * @return New Vec2D object
     */
    constructor(x: number, y: number);
    /**
     * Create a copy of the current vector.
     *
     * @return New Vec2D object
     */
    copy(): Vec2D;
    /**
     * Test if a vector is equivalent to the current one.
     *
     * @param b Other vector
     * @return Are the vectors equal?
     */
    equals(b: Vec2D): boolean;
    /**
     * Add a new vector to the current one.
     *
     * @param b Addend vector
     * @return Resultant sum of the vectors
     */
    add(b: Vec2D): Vec2D;
    /**
     * Subtract a vector from the current one.
     *
     * @param b Subtrahend vector
     * @return Resultant difference of the vectors
     */
    sub(b: Vec2D): Vec2D;
    /**
     * Multiply the current vector by a scalar value.
     *
     * @param s Scalar value
     * @return Resultant product
     */
    scale(s: number): Vec2D;
    /**
     * Calculate the dot product with another vector.
     *
     * @param b Other vector
     * @return Resultant dot product
     */
    dot(b: Vec2D): number;
    /**
     * Get the squared length of the vector.
     *
     * @return Squared length
     */
    lengthSq(): number;
    /**
     * Get the cartesian length of the vector.
     *
     * @return Cartesian length
     */
    length(): number;
    /**
     * Get the unit vector.
     *
     * @return Directional vector of length 1.
     */
    unit(): Vec2D;
    /**
     * Get the array representation of the vector.
     *
     * @return Ordered list of coordinate values
     */
    get(): number[];
    /**
     * Grab the string representation of the vector.
     *
     * @return Comma-separated values
     */
    toString(): string;
    /**
     * Create a new Vec2D object from a comma-separated string.
     *
     * @param string Comma-separated values
     * @return New Vec2D object
     */
    static fromString(string: string): Vec2D;
}
export { Vec2D };