/*
* Copyright (C) 2020 Christopher J. Howard
*
* This file is part of Antkeeper source code.
*
* Antkeeper source code is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Antkeeper source code is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Antkeeper source code. If not, see .
*/
#ifndef ANTKEEPER_MATH_CONSTANTS_HPP
#define ANTKEEPER_MATH_CONSTANTS_HPP
#include "math/matrix-type.hpp"
#include "math/quaternion-type.hpp"
#include "math/transform-type.hpp"
namespace math {
/// @addtogroup utility
/// @{
/**
* Pi.
*/
template
constexpr T pi = T(3.14159265358979323846);
/**
* Pi / 2.
*/
template
constexpr T half_pi = pi * T(0.5);
/**
* Pi * 2.
*/
template
constexpr T two_pi = pi * T(2);
/**
* 2x2 identity matrix.
*/
template
constexpr matrix identity2x2 =
{{
{1, 0},
{0, 1}
}};
/**
* 3x3 identity matrix.
*/
template
constexpr matrix identity3x3 =
{{
{1, 0, 0},
{0, 1, 0},
{0, 0, 1}
}};
/**
* 4x4 identity matrix.
*/
template
constexpr matrix identity4x4 =
{{
{1, 0, 0, 0},
{0, 1, 0, 0},
{0, 0, 1, 0},
{0, 0, 0, 1}
}};
/**
* Unit quaternion.
*/
template
constexpr quaternion identity_quaternion = {T(1), T(0), T(0), T(0)};
/**
* Identity transform.
*/
template
constexpr transform identity_transform =
{
{T(0), T(0), T(0)},
{T(1), T(0), T(0), T(0)},
{T(1), T(1), T(1)}
};
/// @}
} // namespace math
#endif // ANTKEEPER_MATH_CONSTANTS_HPP