export declare let EPSILON: number;
/**
 * Set the value for EPSILON for various checks
 * @param v - Value to use for EPSILON.
 * @returns previous value of EPSILON;
 */
export declare function setEpsilon(v: number): number;
/**
 * Convert degrees to radians
 * @param degrees - Angle in degrees
 * @returns angle converted to radians
 */
export declare function degToRad(degrees: number): number;
/**
 * Convert radians to degrees
 * @param radians - Angle in radians
 * @returns angle converted to degrees
 */
export declare function radToDeg(radians: number): number;
/**
 * Lerps between a and b via t
 * @param a - starting value
 * @param b - ending value
 * @param t - value where 0 = a and 1 = b
 * @returns a + (b - a) * t
 */
export declare function lerp(a: number, b: number, t: number): number;
/**
 * Compute the opposite of lerp. Given a and b and a value between
 * a and b returns a value between 0 and 1. 0 if a, 1 if b.
 * Note: no clamping is done.
 * @param a - start value
 * @param b - end value
 * @param v - value between a and b
 * @returns (v - a) / (b - a)
 */
export declare function inverseLerp(a: number, b: number, v: number): number;
/**
 * Compute the euclidean modulo
 *
 * ```
 * // table for n / 3
 * -5, -4, -3, -2, -1,  0,  1,  2,  3,  4,  5   <- n
 * ------------------------------------
 * -2  -1  -0  -2  -1   0,  1,  2,  0,  1,  2   <- n % 3
 *  1   2   0   1   2   0,  1,  2,  0,  1,  2   <- euclideanModule(n, 3)
 * ```
 *
 * @param n - dividend
 * @param m - divisor
 * @returns the euclidean modulo of n / m
 */
export declare function euclideanModulo(n: number, m: number): number;