import type { Point2d } from './types.ts';
/**
 * Operations with two-dimensional vector.
 */
export declare class Vector2 implements Point2d {
    /** Coordinate in x axis. */
    x: number;
    /** Coordinate in y axis. */
    y: number;
    /**
     * Vector2 constructor.
     * @param x X coordinate.
     * @param y Y coordinate.
     */
    constructor(x: number, y: number);
    /**
     * Takes coordinates and returns vector.
     * @param x X coordinate.
     * @param y Y coordinate.
     * @returns Vector.
     */
    static of(x?: number, y?: number): Vector2;
    /**
     * Returns vector from point-like interface.
     * @param source Point-like interface.
     * @returns Vector.
     */
    static from<T extends Point2d>(source: T): Vector2;
    /**
     * Returns plain object with coordinates of vector.
     * @returns Plain object.
     */
    toJSON(): Point2d;
    /**
     * Returns new instance of Vector2 with same x and y.
     * @returns New instance.
     */
    clone(): Vector2;
    /**
     * Copies coordinates from given vector.
     * @param vector Vector.
     * @returns This.
     */
    copy(vector: Point2d): this;
    /**
     * Sets the X coordinate.
     * @param x X coordinate.
     * @returns This.
     */
    setX(x: number): this;
    /**
     * Sets the Y coordinate.
     * @param y Y coordinate.
     * @returns This.
     */
    setY(y: number): this;
    /**
     * Adds value to the X coordinate.
     * @param x X coordinate.
     * @returns This.
     */
    addX(x: number): this;
    /**
     * Adds value to the Y coordinate.
     * @param y Y coordinate.
     * @returns This.
     */
    addY(y: number): this;
    /**
     * Subtracts value to the X coordinate.
     * @param x X coordinate.
     * @returns This.
     */
    subX(x: number): this;
    /**
     * Subtracts value to the Y coordinate.
     * @param y Y coordinate.
     * @returns This.
     */
    subY(y: number): this;
    /**
     * Vector addition.
     * @param vector Vector.
     * @returns This.
     */
    add(vector: Point2d): this;
    /**
     * Vector subtraction.
     * @param vector Vector.
     * @returns This.
     */
    subtract(vector: Point2d): this;
    /**
     * Multiplies this vector by given vector.
     * @param vector Vector.
     * @returns This.
     */
    multiply(vector: Point2d): this;
    /**
     * Multiplying a vector by a scalar.
     * @param scalar Scalar.
     * @returns This.
     */
    scale(scalar: number): this;
    /**
     * Makes length equals to 1.
     * @returns This.
     */
    normalize(): this;
    /**
     * Check that two vectors are equal.
     * @param vector Vector.
     * @returns True if vectors are equal, false otherwise.
     */
    equalsTo(vector: Point2d): boolean;
    /**
     * Returns distance between two vectors.
     * @param vector Vector.
     * @returns Distance.
     */
    getDistance(vector: Point2d): number;
    /**
     * Returns length of vector.
     * @returns Length.
     */
    getLength(): number;
    /**
     * Rotates vector around origin.
     * @param radians Angle in radians.
     * @returns This.
     */
    rotate(radians: number): this;
    /**
     * Rotates vector around given pivot.
     * @param pivot Pivot.
     * @param radians Angle in radians.
     * @returns This.
     */
    rotateAround(pivot: Point2d, radians: number): this;
}