proc.hash

Deterministic, portable scoped hashing for the procgen evaluator.

scoped(seed, graphId, compositePath, nodeId, channel, elementId) -> number folds its arguments with 32-bit FNV-1a (via an exact 16-bit-split mul32) and a final avalanche, producing a bit-identical u32 on native, WASM, and Android. unitFloat(...) maps the same scope to a value in [0, 1) for deterministic random draws. scopePrefix(seed, graphId, compositePath, nodeId, channel) folds a scope without its element, and scopedFrom(prefix, elementId) resumes it to the same number scoped answers.

hashInts(seed, ...) and unitFromInts(seed, ...) hash a seed and integer coordinates, and latticeCell2 / latticeCell3 (unitCell2 / unitCell3) answer the corner hashes of one lattice cell, which proc.noise is built on. valueHash(v) is an order-sensitive structural hash of any acyclic Luau value, an integer in [0, 2^52) used for content-addressed cache keys, and valueHashBetween(v, between) is the same digest for a large value, calling between as it walks.

Integer arithmetic alone decides every answer, so the same inputs hash the same on every platform. The per-element scope (elementId) keeps a given element's draw stable as unrelated element counts grow.

local r = proc.hash.unitFloat(42, "cash_pile", "", "scatter", 0, 7)