export declare class VowlMath {
    static loopFunction: any;
    /**
     * Calculates the normal vector of the path between the two nodes.
     * @param source the first node
     * @param target the second node
     * @param length the length of the calculated normal vector
     * @returns {{x: number, y: number}}
     */
    static calculateNormalVector: (source: any, target: any, length: any) => {
        x: number;
        y: number;
    };
    /**
     * Calculates the path for a link, if it is a loop. Currently only working for circlular nodes.
     * @param link the link
     * @returns {*}
     */
    static getLoopPoints: (link: any) => {
        x: any;
        y: any;
    }[];
    static calculateLoopPath: (link: any) => any;
    static calculateLoopPoints: (link: any) => any[];
    /**
     * @param angle
     * @returns {number} the radian of the angle
     */
    static calculateRadian: (angle: any) => number;
    /**
     * @param radian
     * @returns {number} the angle of the radian
     */
    static calculateAngle: (radian: any) => number;
    /**
     * Calculates the point where the link between the source and target node
     * intersects the border of the target node.
     * @param source the source node
     * @param target the target node
     * @param additionalDistance additional distance the
     * @returns {{x: number, y: number}}
     */
    static calculateIntersection: (source: any, target: any, additionalDistance: any) => {
        x: any;
        y: any;
    };
    static calculateCenter: (firstPoint: any, secondPoint: any) => {
        x: number;
        y: number;
    };
}