/**
 * @see https://www.shadertoy.com/view/stVfWc
 * @param {number[]} out
 * @param {number} out_offset
 * @param {number[]} normal
 * @param {number} normal_offset
 * @param {function():number} random
 */
export function getCosineDirection(out: number[], out_offset: number, normal: number[], normal_offset: number, random: () => number): void;
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