import { type IVec3, type Vec3 } from '../Vec3.js';
import type { IPrng32 } from './prng';
/** Return a pseudorandom number in the range [-1, 1]. */
export declare const randomClosedUnit1Ball: (prng: IPrng32) => number;
/** Return a pseudorandom number in the range (-1, 1). */
export declare const randomOpenUnit1Ball: (prng: IPrng32) => number;
/** Get a pseudorandom point on the unit sphere. */
export declare const uniformSampleSphere: (prng: IPrng32) => Vec3;
/** Get a pseudorandom point on the unit hemisphere. */
export declare const uniformSampleHemisphere: (prng: IPrng32, normal: Readonly<IVec3>) => Vec3;