export declare class Point {
    x: number;
    y: number;
    constructor(x?: number, y?: number);
    clone(): Point;
    magnitude(): number;
    multiply(a: number): Point;
    invert(): Point;
    add(p: Point): Point;
    subtract(p: Point): Point;
    normalize(n?: number): Point;
    distance(p: Point): number;
}