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- /*
- * 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 <http://www.gnu.org/licenses/>.
- */
-
- #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 <class T>
- constexpr T pi = T(3.14159265358979323846);
-
- /**
- * Pi / 2.
- */
- template <class T>
- constexpr T half_pi = pi<T> * T(0.5);
-
- /**
- * Pi * 2.
- */
- template <class T>
- constexpr T two_pi = pi<T> * T(2);
-
- /**
- * 2x2 identity matrix.
- */
- template <class T>
- constexpr matrix<T, 2, 2> identity2x2 =
- {{
- {1, 0},
- {0, 1}
- }};
-
- /**
- * 3x3 identity matrix.
- */
- template <class T>
- constexpr matrix<T, 3, 3> identity3x3 =
- {{
- {1, 0, 0},
- {0, 1, 0},
- {0, 0, 1}
- }};
-
- /**
- * 4x4 identity matrix.
- */
- template <class T>
- constexpr matrix<T, 4, 4> identity4x4 =
- {{
- {1, 0, 0, 0},
- {0, 1, 0, 0},
- {0, 0, 1, 0},
- {0, 0, 0, 1}
- }};
-
- /**
- * Unit quaternion.
- */
- template <class T>
- constexpr quaternion<T> identity_quaternion = {T(1), T(0), T(0), T(0)};
-
- /**
- * Identity transform.
- */
- template <class T>
- constexpr transform<T> 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
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