/** A direction or point in two-dimensional Cartesian space. */
export declare class Vector {
    /** Zero length vector representing the origin. */
    static readonly Zero: Vector;
    /** Unit vector in the positive x direction. */
    static readonly X: Vector;
    /** Unit vector in the positive y direction. */
    static readonly Y: Vector;
    /** Unit vector at an angle of PI/6 from the x axis. */
    static readonly PI_6: Vector;
    /** Unit vector at an angle of PI/3 from the x axis. */
    static readonly PI_3: Vector;
    /** Creates a unit vector given its angle in radians from the x axis. */
    static direction(radians: number): Vector;
    /** The x coordinate. */
    readonly x: number;
    /** The y coordinate. */
    readonly y: number;
    /** Constructs a vector given its x and y coordinates. */
    constructor(x: number, y: number);
    /** Returns true if this vector has the same coordinates as the given vector. */
    equals(v: Vector): boolean;
    /** Returns the length of this vector. */
    length(): number;
    /** Returns the dot product of this vector with the given vector. */
    dot(v: Vector): number;
    /** Returns the vector that results from adding this vector and the given vector. */
    plus(v: Vector): Vector;
    /** Returns the vector that results from subtracting the given vector from this vector. */
    minus(v: Vector): Vector;
    /**
     * Returns the vector that results from scaling the coordinates by the given x and y factors.
     * If only one factor is given, it is used for both coordinates.
     */
    scaledBy(kx: number, ky?: number): Vector;
}