Vkm::Engine::Math::Rng Class Reference

PCG32 pseudo-random generator (O'Neill, 2014). More...

#include <random.h>

Public Member Functions
	Rng (uint64_t seed, uint64_t stream=DEFAULT_STREAM)
	Seed with an explicit state and (optionally) stream selector.
void	seed (uint64_t seed, uint64_t stream=DEFAULT_STREAM)
	Re-seed in place, discarding the current sequence position.
uint32_t	nextU32 ()
	Advance the state and return the next raw 32-bit value.

Detailed Description

PCG32 pseudo-random generator (O'Neill, 2014).

Deterministic and seedable, so each owner can have its own reproducible stream.

Constructor & Destructor Documentation

Rng()

Vkm::Engine::Math::Rng::Rng ( uint64_t seed, uint64_t stream = DEFAULT_STREAM )

inlineexplicit

Seed with an explicit state and (optionally) stream selector.

Parameters

seed	Initial state; any value.
stream	Sequence selector; same seed, different stream is uncorrelated.

Member Function Documentation

seed()

void Vkm::Engine::Math::Rng::seed ( uint64_t seed, uint64_t stream = DEFAULT_STREAM )

inline

Re-seed in place, discarding the current sequence position.

Parameters

seed	Initial state; any value.
stream	Sequence selector; see the constructor.

nextU32()

uint32_t Vkm::Engine::Math::Rng::nextU32 ( )

inline

Advance the state and return the next raw 32-bit value.

One LCG step, then PCG's xorshift-then-rotate output permutation.

Returns

A uniform value over the full 32-bit range.

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The documentation for this class was generated from the following file:

• core/math/random.h