:sig u32 noise64(u64 index, u64 seed = 0) :params index : index position seed : seed set (defaults to 0) return value : a noise value given the 'index' and 'seed' values. :see >noise :content Generates a deterministic 64-bit-indexed noise value for the given `index` and `seed`. ## Related Concepts - PHP: no built-in equivalent; closest matches are userland noise or deterministic pseudo-random helpers - JavaScript / Node.js: no built-in browser equivalent; closest matches are userland noise libraries or deterministic PRNG helpers