rng.hpp

#pragma once

//-----------------------------------------------------------------------------
// SYstem Includes
//-----------------------------------------------------------------------------
#pragma region

#include <stdint.h>
#include <random>

#pragma endregion

//-----------------------------------------------------------------------------
// Declarations and Definitions
//-----------------------------------------------------------------------------
namespace pathtracing
{

class RNG final
{

  public:
	//---------------------------------------------------------------------
	// Constructors and Destructors
	//---------------------------------------------------------------------

	explicit RNG(uint32_t seed = 606418532) noexcept
		: m_generator(),
		  m_distribution(std::uniform_real_distribution<double>(0.0, 1.0))
	{

		Seed(seed);
	}
	RNG(const RNG &rng)
	noexcept = default;
	RNG(RNG &&rng)
	noexcept = default;
	~RNG() = default;

	//---------------------------------------------------------------------
	// Assignment Operators
	//---------------------------------------------------------------------

	RNG &operator=(const RNG &v) = delete;
	RNG &operator=(RNG &&v) = delete;

	//---------------------------------------------------------------------
	// Member Methods
	//---------------------------------------------------------------------

	void Seed(uint32_t seed) noexcept
	{
		m_generator.seed(seed);
	}

	double UniformFloat() noexcept
	{
		return m_distribution(m_generator);
	}

  private:
	//---------------------------------------------------------------------
	// Member Variables
	//---------------------------------------------------------------------

	std::default_random_engine m_generator;
	std::uniform_real_distribution<double> m_distribution;
};
} // namespace pathtracing