geometry.hpp

#pragma once

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

#include "vector.hpp"

#pragma endregion

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

//-------------------------------------------------------------------------
// Declarations and Definitions: Reflection_t
//-------------------------------------------------------------------------

enum struct Reflection_t
{
	Diffuse,
	Specular,
	Refractive
};

struct Ray final
{

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

	constexpr explicit Ray(Vector3 o, Vector3 d,
						   double tmin = 0.0, double tmax = INFINITY,
						   uint32_t depth = 0) noexcept
		: m_o(std::move(o)), m_d(std::move(d)),
		  m_tmin(tmin), m_tmax(tmax), m_depth(depth){};
	constexpr Ray(const Ray &ray) noexcept = default;
	constexpr Ray(Ray &&ray) noexcept = default;
	~Ray() = default;

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

	constexpr Ray &operator=(const Ray &ray) = default;
	constexpr Ray &operator=(Ray &&ray) = default;

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

	constexpr const Vector3 operator()(double t) const
	{
		// generate vector using direction, position and t
		return m_o + m_d * t;
	}

	friend inline std::ostream &operator<<(std::ostream &os, const Ray &r)
	{
		os << "o: " << r.m_o << std::endl;
		os << "d: " << r.m_d << std::endl;
		return os;
	}

	//---------------------------------------------------------------------
	// Member Variables
	//---------------------------------------------------------------------

	Vector3 m_o, m_d;
	mutable double m_tmin, m_tmax;
	uint32_t m_depth;
};
} // namespace pathtracing