: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. :desc Generates a noise value for the given 'index' and 'seed' values. :see >noise :related **PHP:** There is no built-in PHP equivalent; this is closest to userland noise or deterministic pseudo-random helpers **JavaScript / Node.js:** There is no built-in browser equivalent; closest matches are userland noise libraries or deterministic PRNG helpers