/**
     * Convert from radians to degrees
     *
     * @param {number} radians
     * @returns {number} degrees
     */
export declare function radiansToDegrees(radians: number): number;
/**
     * Convert from degrees to radians
     *
     * @param {number} degrees
     * @returns {number} radians
     */
export declare function degreesToRadians(degrees: number): number;
/**
     * Normalize an arbitrary angle to the interval [-180, 180)
     *
     * @param {number} n
     * @returns {number}
     */
export declare function normalizeHalf(n: any): number;
/**
     * Normalize an arbitrary angle to the interval [0, 360)
     *
     * @param {number} n
     * @returns {number}
     */
export declare function normalize(n: any): number;
/**
     * Gets the shortest direction to rotate to another angle
     *
     * @param {number} from
     * @param {number} to
     * @returns {number}
     */
export declare function shortestDirection(from: any, to: any): 0 | 1 | -1;
/**
     * Checks if an angle is between two other angles
     *
     * @param {number} n
     * @param {number} a
     * @param {number} b
     * @returns {boolean}
     */
export declare function between(n: any, a: any, b: any): boolean;
/**
     * Calculates the angular difference between two angles
     * @param {number} a
     * @param {number} b
     * @returns {number}
     */
export declare function diff(a: any, b: any): number;
/**
     * Calculate the minimal distance between two angles
     *
     * @param {number} a
     * @param {number} b
     * @returns {number}
     */
export declare function distance(a: any, b: any): number;
/**
     * Calculate radians from current angle
     *
     * @param {number} n
     * @returns {number}
     */
export declare function toRad(n: any): number;
/**
     * Calculate degrees from current angle
     *
     * @param {number} n
     * @returns {number}
     */
export declare function toDeg(n: any): number;
/**
     * Calculate gons from current angle
     *
     * @param {number} n
     * @returns {number}
     */
export declare function toGon(n: any): number;
/**
     * Given the sine and cosine of an angle, what is the original angle?
     *
     * @param {number} sin
     * @param {number} cos
     * @returns {number}
     */
export declare function fromSinCos(sin: any, cos: any): number;
/**
     * What is the angle of two points making a line
     *
     * @param {Array} p1
     * @param {Array} p2
     * @returns {number}
     */
export declare function fromSlope(p1: any, p2: any): number;
/**
     * Returns the quadrant
     *
     * @param {number} x The point x-coordinate
     * @param {number} y The point y-coordinate
     * @param {number=} k The optional number of regions in the coordinate-system
     * @param {number=} shift An optional angle to rotate the coordinate system
     * @returns {number}
     */
export declare function quadrant(x: any, y: any, k: any, shift: any): number;
/**
     * Calculates the compass direction of the given angle
     *
     * @param {number} angle
     * @returns {string}
     */
export declare function compass(course: any): string;
/**
     * Calculates the linear interpolation of two angles
     *
     * @param {number} a Angle one
     * @param {number} b Angle two
     * @param {number} p Percentage
     * @param {number} dir Direction (either 1 [=CW] or -1 [=CCW])
     * @returns {number}
     */
export declare function lerp(a: any, b: any, p: any, dir: any): any;