/**
 * 2-dimensional noise function.
 * Returns a number in range from -1 to 1.
 * The result is not actually random;
 * it is based on Simplex noise,
 * which means that the return values for two input values that are near one another tend to be near one another.
 * This type of noise is useful when you want a sequence of seemingly random numbers that don’t vary wildly from one to the other.
 */
export declare function noise2D(x: number, y: number): number;
/**
 * 3-dimensional noise function.
 * Returns a number in range from -1 to 1.
 * The result is not actually random;
 * it is based on Simplex noise,
 * which means that the return values for two input values that are near one another tend to be near one another.
 * This type of noise is useful when you want a sequence of seemingly random numbers that don’t vary wildly from one to the other.
 */
export declare function noise3D(x: number, y: number, z: number): number;
/**
 * 4-dimensional noise function.
 * Returns a number in range from -1 to 1.
 * The result is not actually random;
 * it is based on Simplex noise,
 * which means that the return values for two input values that are near one another tend to be near one another.
 * This type of noise is useful when you want a sequence of seemingly random numbers that don’t vary wildly from one to the other.
 */
export declare function noise4D(x: number, y: number, z: number, w: number): number;
/**
 * Random integer in the interval [low, high].
 */
export declare function randInt(low: number, high: number): number;
/**
 * Random float in the interval [low, high].
 */
export declare function randFloat(low: number, high: number): number;