class Rng
rng.ts:13
Members
constructor
- seedSeed
- Undocumented
bool
bool(probability: number) → boolean
- probabilitynumber
- Undocumented
fork
Branch off an independent stream by label.
Use this rather than continuing to draw from the parent when the number of draws a sub-generator makes might change: a branch keeps the parent's subsequent values stable.
- labelstring
- Undocumented
fromSeedstatic
- seedSeed
- Undocumented
gaussian
gaussian(mean: number, stdDev: number) → number
Standard normal, Box–Muller. Both draws are consumed so streams stay aligned.
- meannumber
- Undocumented
- stdDevnumber
- Undocumented
int
int(min: number, max: number) → number
Uniform integer in [min, max].
- minnumber
- Undocumented
- maxnumber
- Undocumented
next
next() → number
Uniform in [0, 1) with 32 bits of resolution.
nextFloat53
nextFloat53() → number
Uniform in [0, 1) with the full 53 bits a double can hold.
nextUint32
nextUint32() → number
Uniform uint32.
pick
pick<T>(items: readonly T[]) → T
- itemsreadonly T[]
- Undocumented
powerLaw
powerLaw(alpha: number, min: number, max: number) → number
Power-law sample in [min, max] with exponent alpha, by inverse CDF.
Stellar masses and asteroid sizes both want this rather than a uniform.
- alphanumber
- Undocumented
- minnumber
- Undocumented
- maxnumber
- Undocumented
range
range(min: number, max: number) → number
Uniform in [min, max).
- minnumber
- Undocumented
- maxnumber
- Undocumented
shuffle
shuffle<T>(items: T[]) → T[]
Fisher–Yates, in place.
- itemsT[]
- Undocumented
unitVector
unitVector() → { x: number; y: number; z: number }
Uniformly distributed direction on the unit sphere (Marsaglia).
weightedIndex
weightedIndex(weights: readonly number[]) → number
Index into a weight table, proportional to the weights.
- weightsreadonly number[]
- Undocumented