/** a general point in Cartesian coordinate system */
export interface Point {
    /** x coordinate */
    x: number;
    /** y coordinate */
    y: number;
    /** polar radius */
    rho?: number;
    /** polar angle (in the unit of `config.angleUnit`) */
    theta?: number;
    /** point orientation (in the unit of `config.angleUnit`) */
    face?: number;
}
/** a sub coordinate system in Cartesian coordinate system */
export default class Coordinate implements Point {
    static from(point: Point): Coordinate;
    x: number;
    y: number;
    $birth?: number;
    private _cos;
    private _sin;
    private _rho;
    private _face;
    private _thetaRadian;
    constructor(x: number, y: number, face?: number);
    face: number;
    readonly rho: number;
    readonly theta: number;
    readonly thetaRadian: number;
    dist2(point: Point): number;
    resolve(point: Point): Coordinate;
    resolve(x: number, y: number, face?: number): Coordinate;
    locate(point: Point): Coordinate;
    locate(x: number, y: number, face?: number): Coordinate;
}