/**
 *  The Point class is an immutable data type to encapsulate a
 *  two-dimensional point with real-value coordinates.
 *  <p>
 *  Note: in order to deal with the difference behavior of double and
 *  Double with respect to -0.0 and +0.0, the Point2D constructor converts
 *  any coordinates that are -0.0 to +0.0.
 *  <p>
 *  For additional documentation,
 *  see <a href="https://algs4.cs.princeton.edu/12oop">Section 1.2</a> of
 *  <i>Algorithms, 4th Edition</i> by Robert Sedgewick and Kevin Wayne.
 *
 */
export default class Point2D {
    private _x;
    private _y;
    constructor(x: number, y: number);
    x(): number;
    y(): number;
    /**
     * Returns the polar radius of this point.
     * @return the polar radius of this point in polar coordinates: sqrt(x*x + y*y)
     */
    r(): number;
    /**
     * Returns the angle of this point in polar coordinates.
     * @return the angle (in radians) of this point in polar coordinates (between –&pi; and &pi;)
     */
    theta(): number;
    /**
     * Returns the Euclidean distance between this point and that point.
     * @param that the other point
     * @return the Euclidean distance between this point and that point
     */
    distanceTo(that: Point2D): number;
    /**
     * Plot this point using standard draw.
     */
    draw(): void;
    /**
     * Return a string representation of this point.
     * @return a string representation of this point in the format (x, y)
     */
    toString(): string;
}