export declare function lerp(a: number, b: number, t: number): number;
export declare function lerpCubic(a: number, b: number, c: number, d: number, t: number): number;
export declare function interpolateHermite(t: number): number;
export declare function interpolateQuintic(t: number): number;
export declare function pingPong(t: number): number;
export declare function hashR2(seed: number, xPrimed: number, yPrimed: number): number;
export declare function hashR3(seed: number, xPrimed: number, yPrimed: number, zPrimed: number): number;
export declare function valueCoordinateR2(seed: number, xPrimed: number, yPrimed: number): number;
export declare function valueCoordinateR3(seed: number, xPrimed: number, yPrimed: number, zPrimed: number): number;
export declare function gradientCoordinateR2(seed: number, xPrimed: number, yPrimed: number, xd: number, yd: number): number;
export declare function gradientCoordinateR3(seed: number, xPrimed: number, yPrimed: number, zPrimed: number, xd: number, yd: number, zd: number): number;