Random (FS-Skia-UI)

Random Module

Type	Description
RngState	Opaque pure RNG state (the xorshift64 stream word). Carry it through your `Model`; thread it with `nextRng`/`nextBelow`. The representation is `private` — construct it only via `seedRng`, advance it only via `nextRng`/`nextBelow`.

Function or value	Description
`nextBelow n state` Full Usage: `nextBelow n state` Parameters: n : `int` state : `RngState` Returns: `int * RngState`	Uniform-ish value in `[0, n)`; requires `n > 0` (raises otherwise). Threads the state like `nextRng`. n : `int` state : `RngState` Returns: `int * RngState`
`nextRng state` Full Usage: `nextRng state` Parameters: state : `RngState` Returns: `uint64 * RngState`	One xorshift64 step: the next 64-bit value and the advanced state. state : `RngState` Returns: `uint64 * RngState`
`seedRng seed` Full Usage: `seedRng seed` Parameters: seed : `uint64` Returns: `RngState`	Expand a seed into an initial state. splitmix64 avoids the all-zero xorshift64 fixed point, so any `seed` (including `0UL`) yields a usable stream. seed : `uint64` Returns: `RngState`