import { Point } from './../models/point.model';
export declare class NlsMathService {
    /**
     * Calculate distance between to points with coordinates.
     * @param a
     * @param b
     */
    Δ(a: Point, b: Point): number;
    getClosestCenter(point: Point, matrix: any): any;
    getFarestCenter(point: Point, matrix: any): any;
    randomPoint(matrix: any, overlap: number): {
        x: any;
        y: any;
    };
    centerOfArea(width: any, height: any): Point;
    centerOfPoints(p1: Point, p2: Point): {
        x: number;
        y: number;
    };
    centerOfCurve(curve: Point[]): {
        x: number;
        y: number;
    } & {
        ascent: number;
    };
    medianOfCurve(curve: Point[]): Point & {
        ascent: number;
    };
    angleRadians(p1: Point, p2: Point): number;
    angleDegree(p1: Point, p2: Point): number;
    medianIndex(list: any): number;
    medianPoint(points: Point[]): IterableIterator<Point>;
    /**
     * Generator for sine bounce
     *
     * @param start 0 indicates to initiate with positive numbers, 1 indicates to
     * start with negative numbers first
     * @param amplitude default to 1 indicates the amplitude in positive as well
     * in negative range
     * @param decimals amount of decimal places
     */
    bounce(amplitude?: number, decimals?: number, start?: number): IterableIterator<number>;
    flipSign(startPositive?: boolean): IterableIterator<number>;
}