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a dinosaur
2024-09-01 02:09:49 +10:00
parent c99155fb47
commit 1f74b79ea2
6 changed files with 62 additions and 60 deletions
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18
Sources/Voxelotl/Random/PCG32Random.swift
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@ -1,5 +1,6 @@
public struct PCG32Random: RandomProvider, RandomStateAccess {
public struct PCG32Random: RandomProvider, RandomSeedable, RandomStateAccess {
public typealias Output = UInt32
public typealias SeedType = (UInt64, UInt64)
public typealias StateType = (UInt64, UInt64)
public static var min: UInt32 { .min }
@ -21,11 +22,20 @@ public struct PCG32Random: RandomProvider, RandomStateAccess {
}
public init(state: (UInt64, UInt64)) {
self.init()
self.reset(state: state.0, sequence: state.1)
self._state = state.0
self._inc = state.1
}
public mutating func reset(state: UInt64, sequence: UInt64) {
public init(seed: (UInt64, UInt64)) {
self.init()
self.seed(state: seed.0, sequence: seed.1)
}
public mutating func seed(_ seed: (UInt64, UInt64)) {
self.seed(state: seed.0, sequence: seed.1)
}
public mutating func seed(state: UInt64, sequence: UInt64) {
self._state = 0
self._inc = sequence << 1 | 0x1
_ = next()